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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
And it is also a step in the direction of killing the separation of data and text maps in map_groups. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-rrds86kb3wx5wk8v38v56gw8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2164 lines
53 KiB
C
2164 lines
53 KiB
C
/*
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* intel_pt.c: Intel Processor Trace support
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* Copyright (c) 2013-2015, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include "../perf.h"
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#include "session.h"
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#include "machine.h"
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#include "sort.h"
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#include "tool.h"
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#include "event.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "map.h"
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#include "color.h"
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#include "util.h"
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#include "thread.h"
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#include "thread-stack.h"
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#include "symbol.h"
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#include "callchain.h"
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#include "dso.h"
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#include "debug.h"
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#include "auxtrace.h"
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#include "tsc.h"
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#include "intel-pt.h"
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#include "intel-pt-decoder/intel-pt-log.h"
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#include "intel-pt-decoder/intel-pt-decoder.h"
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#include "intel-pt-decoder/intel-pt-insn-decoder.h"
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#include "intel-pt-decoder/intel-pt-pkt-decoder.h"
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#define MAX_TIMESTAMP (~0ULL)
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struct intel_pt {
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struct auxtrace auxtrace;
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struct auxtrace_queues queues;
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struct auxtrace_heap heap;
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u32 auxtrace_type;
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struct perf_session *session;
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struct machine *machine;
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struct perf_evsel *switch_evsel;
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struct thread *unknown_thread;
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bool timeless_decoding;
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bool sampling_mode;
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bool snapshot_mode;
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bool per_cpu_mmaps;
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bool have_tsc;
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bool data_queued;
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bool est_tsc;
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bool sync_switch;
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bool mispred_all;
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int have_sched_switch;
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u32 pmu_type;
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u64 kernel_start;
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u64 switch_ip;
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u64 ptss_ip;
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struct perf_tsc_conversion tc;
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bool cap_user_time_zero;
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struct itrace_synth_opts synth_opts;
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bool sample_instructions;
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u64 instructions_sample_type;
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u64 instructions_sample_period;
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u64 instructions_id;
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bool sample_branches;
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u32 branches_filter;
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u64 branches_sample_type;
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u64 branches_id;
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bool sample_transactions;
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u64 transactions_sample_type;
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u64 transactions_id;
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bool synth_needs_swap;
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u64 tsc_bit;
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u64 mtc_bit;
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u64 mtc_freq_bits;
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u32 tsc_ctc_ratio_n;
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u32 tsc_ctc_ratio_d;
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u64 cyc_bit;
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u64 noretcomp_bit;
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unsigned max_non_turbo_ratio;
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};
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enum switch_state {
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INTEL_PT_SS_NOT_TRACING,
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INTEL_PT_SS_UNKNOWN,
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INTEL_PT_SS_TRACING,
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INTEL_PT_SS_EXPECTING_SWITCH_EVENT,
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INTEL_PT_SS_EXPECTING_SWITCH_IP,
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};
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struct intel_pt_queue {
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struct intel_pt *pt;
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unsigned int queue_nr;
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struct auxtrace_buffer *buffer;
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void *decoder;
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const struct intel_pt_state *state;
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struct ip_callchain *chain;
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struct branch_stack *last_branch;
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struct branch_stack *last_branch_rb;
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size_t last_branch_pos;
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union perf_event *event_buf;
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bool on_heap;
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bool stop;
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bool step_through_buffers;
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bool use_buffer_pid_tid;
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pid_t pid, tid;
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int cpu;
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int switch_state;
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pid_t next_tid;
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struct thread *thread;
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bool exclude_kernel;
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bool have_sample;
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u64 time;
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u64 timestamp;
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u32 flags;
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u16 insn_len;
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u64 last_insn_cnt;
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};
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static void intel_pt_dump(struct intel_pt *pt __maybe_unused,
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unsigned char *buf, size_t len)
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{
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struct intel_pt_pkt packet;
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size_t pos = 0;
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int ret, pkt_len, i;
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char desc[INTEL_PT_PKT_DESC_MAX];
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const char *color = PERF_COLOR_BLUE;
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color_fprintf(stdout, color,
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". ... Intel Processor Trace data: size %zu bytes\n",
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len);
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while (len) {
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ret = intel_pt_get_packet(buf, len, &packet);
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if (ret > 0)
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pkt_len = ret;
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else
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pkt_len = 1;
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printf(".");
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color_fprintf(stdout, color, " %08x: ", pos);
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for (i = 0; i < pkt_len; i++)
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color_fprintf(stdout, color, " %02x", buf[i]);
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for (; i < 16; i++)
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color_fprintf(stdout, color, " ");
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if (ret > 0) {
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ret = intel_pt_pkt_desc(&packet, desc,
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INTEL_PT_PKT_DESC_MAX);
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if (ret > 0)
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color_fprintf(stdout, color, " %s\n", desc);
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} else {
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color_fprintf(stdout, color, " Bad packet!\n");
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}
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pos += pkt_len;
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buf += pkt_len;
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len -= pkt_len;
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}
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}
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static void intel_pt_dump_event(struct intel_pt *pt, unsigned char *buf,
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size_t len)
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{
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printf(".\n");
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intel_pt_dump(pt, buf, len);
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}
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static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a,
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struct auxtrace_buffer *b)
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{
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void *start;
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start = intel_pt_find_overlap(a->data, a->size, b->data, b->size,
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pt->have_tsc);
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if (!start)
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return -EINVAL;
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b->use_size = b->data + b->size - start;
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b->use_data = start;
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return 0;
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}
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static void intel_pt_use_buffer_pid_tid(struct intel_pt_queue *ptq,
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struct auxtrace_queue *queue,
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struct auxtrace_buffer *buffer)
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{
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if (queue->cpu == -1 && buffer->cpu != -1)
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ptq->cpu = buffer->cpu;
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ptq->pid = buffer->pid;
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ptq->tid = buffer->tid;
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intel_pt_log("queue %u cpu %d pid %d tid %d\n",
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ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
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thread__zput(ptq->thread);
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if (ptq->tid != -1) {
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if (ptq->pid != -1)
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ptq->thread = machine__findnew_thread(ptq->pt->machine,
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ptq->pid,
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ptq->tid);
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else
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ptq->thread = machine__find_thread(ptq->pt->machine, -1,
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ptq->tid);
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}
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}
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/* This function assumes data is processed sequentially only */
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static int intel_pt_get_trace(struct intel_pt_buffer *b, void *data)
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{
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struct intel_pt_queue *ptq = data;
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struct auxtrace_buffer *buffer = ptq->buffer, *old_buffer = buffer;
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struct auxtrace_queue *queue;
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if (ptq->stop) {
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b->len = 0;
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return 0;
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}
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queue = &ptq->pt->queues.queue_array[ptq->queue_nr];
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buffer = auxtrace_buffer__next(queue, buffer);
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if (!buffer) {
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if (old_buffer)
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auxtrace_buffer__drop_data(old_buffer);
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b->len = 0;
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return 0;
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}
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ptq->buffer = buffer;
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if (!buffer->data) {
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int fd = perf_data_file__fd(ptq->pt->session->file);
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buffer->data = auxtrace_buffer__get_data(buffer, fd);
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if (!buffer->data)
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return -ENOMEM;
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}
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if (ptq->pt->snapshot_mode && !buffer->consecutive && old_buffer &&
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intel_pt_do_fix_overlap(ptq->pt, old_buffer, buffer))
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return -ENOMEM;
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if (old_buffer)
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auxtrace_buffer__drop_data(old_buffer);
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if (buffer->use_data) {
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b->len = buffer->use_size;
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b->buf = buffer->use_data;
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} else {
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b->len = buffer->size;
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b->buf = buffer->data;
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}
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b->ref_timestamp = buffer->reference;
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if (!old_buffer || ptq->pt->sampling_mode || (ptq->pt->snapshot_mode &&
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!buffer->consecutive)) {
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b->consecutive = false;
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b->trace_nr = buffer->buffer_nr + 1;
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} else {
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b->consecutive = true;
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}
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if (ptq->use_buffer_pid_tid && (ptq->pid != buffer->pid ||
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ptq->tid != buffer->tid))
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intel_pt_use_buffer_pid_tid(ptq, queue, buffer);
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if (ptq->step_through_buffers)
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ptq->stop = true;
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if (!b->len)
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return intel_pt_get_trace(b, data);
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return 0;
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}
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struct intel_pt_cache_entry {
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struct auxtrace_cache_entry entry;
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u64 insn_cnt;
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u64 byte_cnt;
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enum intel_pt_insn_op op;
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enum intel_pt_insn_branch branch;
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int length;
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int32_t rel;
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};
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static int intel_pt_config_div(const char *var, const char *value, void *data)
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{
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int *d = data;
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long val;
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if (!strcmp(var, "intel-pt.cache-divisor")) {
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val = strtol(value, NULL, 0);
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if (val > 0 && val <= INT_MAX)
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*d = val;
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}
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return 0;
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}
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static int intel_pt_cache_divisor(void)
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{
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static int d;
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if (d)
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return d;
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perf_config(intel_pt_config_div, &d);
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if (!d)
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d = 64;
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return d;
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}
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static unsigned int intel_pt_cache_size(struct dso *dso,
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struct machine *machine)
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{
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off_t size;
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size = dso__data_size(dso, machine);
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size /= intel_pt_cache_divisor();
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if (size < 1000)
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return 10;
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if (size > (1 << 21))
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return 21;
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return 32 - __builtin_clz(size);
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}
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static struct auxtrace_cache *intel_pt_cache(struct dso *dso,
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struct machine *machine)
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{
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struct auxtrace_cache *c;
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unsigned int bits;
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if (dso->auxtrace_cache)
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return dso->auxtrace_cache;
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bits = intel_pt_cache_size(dso, machine);
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/* Ignoring cache creation failure */
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c = auxtrace_cache__new(bits, sizeof(struct intel_pt_cache_entry), 200);
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dso->auxtrace_cache = c;
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return c;
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}
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static int intel_pt_cache_add(struct dso *dso, struct machine *machine,
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u64 offset, u64 insn_cnt, u64 byte_cnt,
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struct intel_pt_insn *intel_pt_insn)
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{
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struct auxtrace_cache *c = intel_pt_cache(dso, machine);
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struct intel_pt_cache_entry *e;
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int err;
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if (!c)
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return -ENOMEM;
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e = auxtrace_cache__alloc_entry(c);
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if (!e)
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return -ENOMEM;
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e->insn_cnt = insn_cnt;
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e->byte_cnt = byte_cnt;
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e->op = intel_pt_insn->op;
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e->branch = intel_pt_insn->branch;
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e->length = intel_pt_insn->length;
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e->rel = intel_pt_insn->rel;
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err = auxtrace_cache__add(c, offset, &e->entry);
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if (err)
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auxtrace_cache__free_entry(c, e);
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return err;
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}
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static struct intel_pt_cache_entry *
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intel_pt_cache_lookup(struct dso *dso, struct machine *machine, u64 offset)
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{
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struct auxtrace_cache *c = intel_pt_cache(dso, machine);
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if (!c)
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return NULL;
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return auxtrace_cache__lookup(dso->auxtrace_cache, offset);
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}
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static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
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uint64_t *insn_cnt_ptr, uint64_t *ip,
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uint64_t to_ip, uint64_t max_insn_cnt,
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void *data)
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{
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struct intel_pt_queue *ptq = data;
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struct machine *machine = ptq->pt->machine;
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struct thread *thread;
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struct addr_location al;
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unsigned char buf[1024];
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size_t bufsz;
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ssize_t len;
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int x86_64;
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u8 cpumode;
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u64 offset, start_offset, start_ip;
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u64 insn_cnt = 0;
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bool one_map = true;
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if (to_ip && *ip == to_ip)
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goto out_no_cache;
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bufsz = intel_pt_insn_max_size();
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if (*ip >= ptq->pt->kernel_start)
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cpumode = PERF_RECORD_MISC_KERNEL;
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else
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cpumode = PERF_RECORD_MISC_USER;
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thread = ptq->thread;
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if (!thread) {
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if (cpumode != PERF_RECORD_MISC_KERNEL)
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return -EINVAL;
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thread = ptq->pt->unknown_thread;
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}
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while (1) {
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thread__find_addr_map(thread, cpumode, MAP__FUNCTION, *ip, &al);
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if (!al.map || !al.map->dso)
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return -EINVAL;
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|
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if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
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dso__data_status_seen(al.map->dso,
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DSO_DATA_STATUS_SEEN_ITRACE))
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return -ENOENT;
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|
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offset = al.map->map_ip(al.map, *ip);
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|
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if (!to_ip && one_map) {
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struct intel_pt_cache_entry *e;
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|
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e = intel_pt_cache_lookup(al.map->dso, machine, offset);
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if (e &&
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(!max_insn_cnt || e->insn_cnt <= max_insn_cnt)) {
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*insn_cnt_ptr = e->insn_cnt;
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*ip += e->byte_cnt;
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intel_pt_insn->op = e->op;
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intel_pt_insn->branch = e->branch;
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intel_pt_insn->length = e->length;
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intel_pt_insn->rel = e->rel;
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intel_pt_log_insn_no_data(intel_pt_insn, *ip);
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return 0;
|
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}
|
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}
|
|
|
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start_offset = offset;
|
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start_ip = *ip;
|
|
|
|
/* Load maps to ensure dso->is_64_bit has been updated */
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map__load(al.map, machine->symbol_filter);
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|
|
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x86_64 = al.map->dso->is_64_bit;
|
|
|
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while (1) {
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len = dso__data_read_offset(al.map->dso, machine,
|
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offset, buf, bufsz);
|
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if (len <= 0)
|
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return -EINVAL;
|
|
|
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if (intel_pt_get_insn(buf, len, x86_64, intel_pt_insn))
|
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return -EINVAL;
|
|
|
|
intel_pt_log_insn(intel_pt_insn, *ip);
|
|
|
|
insn_cnt += 1;
|
|
|
|
if (intel_pt_insn->branch != INTEL_PT_BR_NO_BRANCH)
|
|
goto out;
|
|
|
|
if (max_insn_cnt && insn_cnt >= max_insn_cnt)
|
|
goto out_no_cache;
|
|
|
|
*ip += intel_pt_insn->length;
|
|
|
|
if (to_ip && *ip == to_ip)
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goto out_no_cache;
|
|
|
|
if (*ip >= al.map->end)
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|
break;
|
|
|
|
offset += intel_pt_insn->length;
|
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}
|
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one_map = false;
|
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}
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out:
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*insn_cnt_ptr = insn_cnt;
|
|
|
|
if (!one_map)
|
|
goto out_no_cache;
|
|
|
|
/*
|
|
* Didn't lookup in the 'to_ip' case, so do it now to prevent duplicate
|
|
* entries.
|
|
*/
|
|
if (to_ip) {
|
|
struct intel_pt_cache_entry *e;
|
|
|
|
e = intel_pt_cache_lookup(al.map->dso, machine, start_offset);
|
|
if (e)
|
|
return 0;
|
|
}
|
|
|
|
/* Ignore cache errors */
|
|
intel_pt_cache_add(al.map->dso, machine, start_offset, insn_cnt,
|
|
*ip - start_ip, intel_pt_insn);
|
|
|
|
return 0;
|
|
|
|
out_no_cache:
|
|
*insn_cnt_ptr = insn_cnt;
|
|
return 0;
|
|
}
|
|
|
|
static bool intel_pt_get_config(struct intel_pt *pt,
|
|
struct perf_event_attr *attr, u64 *config)
|
|
{
|
|
if (attr->type == pt->pmu_type) {
|
|
if (config)
|
|
*config = attr->config;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool intel_pt_exclude_kernel(struct intel_pt *pt)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each(pt->session->evlist, evsel) {
|
|
if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
|
|
!evsel->attr.exclude_kernel)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool intel_pt_return_compression(struct intel_pt *pt)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
u64 config;
|
|
|
|
if (!pt->noretcomp_bit)
|
|
return true;
|
|
|
|
evlist__for_each(pt->session->evlist, evsel) {
|
|
if (intel_pt_get_config(pt, &evsel->attr, &config) &&
|
|
(config & pt->noretcomp_bit))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static unsigned int intel_pt_mtc_period(struct intel_pt *pt)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
unsigned int shift;
|
|
u64 config;
|
|
|
|
if (!pt->mtc_freq_bits)
|
|
return 0;
|
|
|
|
for (shift = 0, config = pt->mtc_freq_bits; !(config & 1); shift++)
|
|
config >>= 1;
|
|
|
|
evlist__for_each(pt->session->evlist, evsel) {
|
|
if (intel_pt_get_config(pt, &evsel->attr, &config))
|
|
return (config & pt->mtc_freq_bits) >> shift;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool intel_pt_timeless_decoding(struct intel_pt *pt)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
bool timeless_decoding = true;
|
|
u64 config;
|
|
|
|
if (!pt->tsc_bit || !pt->cap_user_time_zero)
|
|
return true;
|
|
|
|
evlist__for_each(pt->session->evlist, evsel) {
|
|
if (!(evsel->attr.sample_type & PERF_SAMPLE_TIME))
|
|
return true;
|
|
if (intel_pt_get_config(pt, &evsel->attr, &config)) {
|
|
if (config & pt->tsc_bit)
|
|
timeless_decoding = false;
|
|
else
|
|
return true;
|
|
}
|
|
}
|
|
return timeless_decoding;
|
|
}
|
|
|
|
static bool intel_pt_tracing_kernel(struct intel_pt *pt)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each(pt->session->evlist, evsel) {
|
|
if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
|
|
!evsel->attr.exclude_kernel)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool intel_pt_have_tsc(struct intel_pt *pt)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
bool have_tsc = false;
|
|
u64 config;
|
|
|
|
if (!pt->tsc_bit)
|
|
return false;
|
|
|
|
evlist__for_each(pt->session->evlist, evsel) {
|
|
if (intel_pt_get_config(pt, &evsel->attr, &config)) {
|
|
if (config & pt->tsc_bit)
|
|
have_tsc = true;
|
|
else
|
|
return false;
|
|
}
|
|
}
|
|
return have_tsc;
|
|
}
|
|
|
|
static u64 intel_pt_ns_to_ticks(const struct intel_pt *pt, u64 ns)
|
|
{
|
|
u64 quot, rem;
|
|
|
|
quot = ns / pt->tc.time_mult;
|
|
rem = ns % pt->tc.time_mult;
|
|
return (quot << pt->tc.time_shift) + (rem << pt->tc.time_shift) /
|
|
pt->tc.time_mult;
|
|
}
|
|
|
|
static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
|
|
unsigned int queue_nr)
|
|
{
|
|
struct intel_pt_params params = { .get_trace = 0, };
|
|
struct intel_pt_queue *ptq;
|
|
|
|
ptq = zalloc(sizeof(struct intel_pt_queue));
|
|
if (!ptq)
|
|
return NULL;
|
|
|
|
if (pt->synth_opts.callchain) {
|
|
size_t sz = sizeof(struct ip_callchain);
|
|
|
|
sz += pt->synth_opts.callchain_sz * sizeof(u64);
|
|
ptq->chain = zalloc(sz);
|
|
if (!ptq->chain)
|
|
goto out_free;
|
|
}
|
|
|
|
if (pt->synth_opts.last_branch) {
|
|
size_t sz = sizeof(struct branch_stack);
|
|
|
|
sz += pt->synth_opts.last_branch_sz *
|
|
sizeof(struct branch_entry);
|
|
ptq->last_branch = zalloc(sz);
|
|
if (!ptq->last_branch)
|
|
goto out_free;
|
|
ptq->last_branch_rb = zalloc(sz);
|
|
if (!ptq->last_branch_rb)
|
|
goto out_free;
|
|
}
|
|
|
|
ptq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE);
|
|
if (!ptq->event_buf)
|
|
goto out_free;
|
|
|
|
ptq->pt = pt;
|
|
ptq->queue_nr = queue_nr;
|
|
ptq->exclude_kernel = intel_pt_exclude_kernel(pt);
|
|
ptq->pid = -1;
|
|
ptq->tid = -1;
|
|
ptq->cpu = -1;
|
|
ptq->next_tid = -1;
|
|
|
|
params.get_trace = intel_pt_get_trace;
|
|
params.walk_insn = intel_pt_walk_next_insn;
|
|
params.data = ptq;
|
|
params.return_compression = intel_pt_return_compression(pt);
|
|
params.max_non_turbo_ratio = pt->max_non_turbo_ratio;
|
|
params.mtc_period = intel_pt_mtc_period(pt);
|
|
params.tsc_ctc_ratio_n = pt->tsc_ctc_ratio_n;
|
|
params.tsc_ctc_ratio_d = pt->tsc_ctc_ratio_d;
|
|
|
|
if (pt->synth_opts.instructions) {
|
|
if (pt->synth_opts.period) {
|
|
switch (pt->synth_opts.period_type) {
|
|
case PERF_ITRACE_PERIOD_INSTRUCTIONS:
|
|
params.period_type =
|
|
INTEL_PT_PERIOD_INSTRUCTIONS;
|
|
params.period = pt->synth_opts.period;
|
|
break;
|
|
case PERF_ITRACE_PERIOD_TICKS:
|
|
params.period_type = INTEL_PT_PERIOD_TICKS;
|
|
params.period = pt->synth_opts.period;
|
|
break;
|
|
case PERF_ITRACE_PERIOD_NANOSECS:
|
|
params.period_type = INTEL_PT_PERIOD_TICKS;
|
|
params.period = intel_pt_ns_to_ticks(pt,
|
|
pt->synth_opts.period);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!params.period) {
|
|
params.period_type = INTEL_PT_PERIOD_INSTRUCTIONS;
|
|
params.period = 1;
|
|
}
|
|
}
|
|
|
|
ptq->decoder = intel_pt_decoder_new(¶ms);
|
|
if (!ptq->decoder)
|
|
goto out_free;
|
|
|
|
return ptq;
|
|
|
|
out_free:
|
|
zfree(&ptq->event_buf);
|
|
zfree(&ptq->last_branch);
|
|
zfree(&ptq->last_branch_rb);
|
|
zfree(&ptq->chain);
|
|
free(ptq);
|
|
return NULL;
|
|
}
|
|
|
|
static void intel_pt_free_queue(void *priv)
|
|
{
|
|
struct intel_pt_queue *ptq = priv;
|
|
|
|
if (!ptq)
|
|
return;
|
|
thread__zput(ptq->thread);
|
|
intel_pt_decoder_free(ptq->decoder);
|
|
zfree(&ptq->event_buf);
|
|
zfree(&ptq->last_branch);
|
|
zfree(&ptq->last_branch_rb);
|
|
zfree(&ptq->chain);
|
|
free(ptq);
|
|
}
|
|
|
|
static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt,
|
|
struct auxtrace_queue *queue)
|
|
{
|
|
struct intel_pt_queue *ptq = queue->priv;
|
|
|
|
if (queue->tid == -1 || pt->have_sched_switch) {
|
|
ptq->tid = machine__get_current_tid(pt->machine, ptq->cpu);
|
|
thread__zput(ptq->thread);
|
|
}
|
|
|
|
if (!ptq->thread && ptq->tid != -1)
|
|
ptq->thread = machine__find_thread(pt->machine, -1, ptq->tid);
|
|
|
|
if (ptq->thread) {
|
|
ptq->pid = ptq->thread->pid_;
|
|
if (queue->cpu == -1)
|
|
ptq->cpu = ptq->thread->cpu;
|
|
}
|
|
}
|
|
|
|
static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
|
|
{
|
|
if (ptq->state->flags & INTEL_PT_ABORT_TX) {
|
|
ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT;
|
|
} else if (ptq->state->flags & INTEL_PT_ASYNC) {
|
|
if (ptq->state->to_ip)
|
|
ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
|
|
PERF_IP_FLAG_ASYNC |
|
|
PERF_IP_FLAG_INTERRUPT;
|
|
else
|
|
ptq->flags = PERF_IP_FLAG_BRANCH |
|
|
PERF_IP_FLAG_TRACE_END;
|
|
ptq->insn_len = 0;
|
|
} else {
|
|
if (ptq->state->from_ip)
|
|
ptq->flags = intel_pt_insn_type(ptq->state->insn_op);
|
|
else
|
|
ptq->flags = PERF_IP_FLAG_BRANCH |
|
|
PERF_IP_FLAG_TRACE_BEGIN;
|
|
if (ptq->state->flags & INTEL_PT_IN_TX)
|
|
ptq->flags |= PERF_IP_FLAG_IN_TX;
|
|
ptq->insn_len = ptq->state->insn_len;
|
|
}
|
|
}
|
|
|
|
static int intel_pt_setup_queue(struct intel_pt *pt,
|
|
struct auxtrace_queue *queue,
|
|
unsigned int queue_nr)
|
|
{
|
|
struct intel_pt_queue *ptq = queue->priv;
|
|
|
|
if (list_empty(&queue->head))
|
|
return 0;
|
|
|
|
if (!ptq) {
|
|
ptq = intel_pt_alloc_queue(pt, queue_nr);
|
|
if (!ptq)
|
|
return -ENOMEM;
|
|
queue->priv = ptq;
|
|
|
|
if (queue->cpu != -1)
|
|
ptq->cpu = queue->cpu;
|
|
ptq->tid = queue->tid;
|
|
|
|
if (pt->sampling_mode) {
|
|
if (pt->timeless_decoding)
|
|
ptq->step_through_buffers = true;
|
|
if (pt->timeless_decoding || !pt->have_sched_switch)
|
|
ptq->use_buffer_pid_tid = true;
|
|
}
|
|
}
|
|
|
|
if (!ptq->on_heap &&
|
|
(!pt->sync_switch ||
|
|
ptq->switch_state != INTEL_PT_SS_EXPECTING_SWITCH_EVENT)) {
|
|
const struct intel_pt_state *state;
|
|
int ret;
|
|
|
|
if (pt->timeless_decoding)
|
|
return 0;
|
|
|
|
intel_pt_log("queue %u getting timestamp\n", queue_nr);
|
|
intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
|
|
queue_nr, ptq->cpu, ptq->pid, ptq->tid);
|
|
while (1) {
|
|
state = intel_pt_decode(ptq->decoder);
|
|
if (state->err) {
|
|
if (state->err == INTEL_PT_ERR_NODATA) {
|
|
intel_pt_log("queue %u has no timestamp\n",
|
|
queue_nr);
|
|
return 0;
|
|
}
|
|
continue;
|
|
}
|
|
if (state->timestamp)
|
|
break;
|
|
}
|
|
|
|
ptq->timestamp = state->timestamp;
|
|
intel_pt_log("queue %u timestamp 0x%" PRIx64 "\n",
|
|
queue_nr, ptq->timestamp);
|
|
ptq->state = state;
|
|
ptq->have_sample = true;
|
|
intel_pt_sample_flags(ptq);
|
|
ret = auxtrace_heap__add(&pt->heap, queue_nr, ptq->timestamp);
|
|
if (ret)
|
|
return ret;
|
|
ptq->on_heap = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_pt_setup_queues(struct intel_pt *pt)
|
|
{
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
for (i = 0; i < pt->queues.nr_queues; i++) {
|
|
ret = intel_pt_setup_queue(pt, &pt->queues.queue_array[i], i);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void intel_pt_copy_last_branch_rb(struct intel_pt_queue *ptq)
|
|
{
|
|
struct branch_stack *bs_src = ptq->last_branch_rb;
|
|
struct branch_stack *bs_dst = ptq->last_branch;
|
|
size_t nr = 0;
|
|
|
|
bs_dst->nr = bs_src->nr;
|
|
|
|
if (!bs_src->nr)
|
|
return;
|
|
|
|
nr = ptq->pt->synth_opts.last_branch_sz - ptq->last_branch_pos;
|
|
memcpy(&bs_dst->entries[0],
|
|
&bs_src->entries[ptq->last_branch_pos],
|
|
sizeof(struct branch_entry) * nr);
|
|
|
|
if (bs_src->nr >= ptq->pt->synth_opts.last_branch_sz) {
|
|
memcpy(&bs_dst->entries[nr],
|
|
&bs_src->entries[0],
|
|
sizeof(struct branch_entry) * ptq->last_branch_pos);
|
|
}
|
|
}
|
|
|
|
static inline void intel_pt_reset_last_branch_rb(struct intel_pt_queue *ptq)
|
|
{
|
|
ptq->last_branch_pos = 0;
|
|
ptq->last_branch_rb->nr = 0;
|
|
}
|
|
|
|
static void intel_pt_update_last_branch_rb(struct intel_pt_queue *ptq)
|
|
{
|
|
const struct intel_pt_state *state = ptq->state;
|
|
struct branch_stack *bs = ptq->last_branch_rb;
|
|
struct branch_entry *be;
|
|
|
|
if (!ptq->last_branch_pos)
|
|
ptq->last_branch_pos = ptq->pt->synth_opts.last_branch_sz;
|
|
|
|
ptq->last_branch_pos -= 1;
|
|
|
|
be = &bs->entries[ptq->last_branch_pos];
|
|
be->from = state->from_ip;
|
|
be->to = state->to_ip;
|
|
be->flags.abort = !!(state->flags & INTEL_PT_ABORT_TX);
|
|
be->flags.in_tx = !!(state->flags & INTEL_PT_IN_TX);
|
|
/* No support for mispredict */
|
|
be->flags.mispred = ptq->pt->mispred_all;
|
|
|
|
if (bs->nr < ptq->pt->synth_opts.last_branch_sz)
|
|
bs->nr += 1;
|
|
}
|
|
|
|
static int intel_pt_inject_event(union perf_event *event,
|
|
struct perf_sample *sample, u64 type,
|
|
bool swapped)
|
|
{
|
|
event->header.size = perf_event__sample_event_size(sample, type, 0);
|
|
return perf_event__synthesize_sample(event, type, 0, sample, swapped);
|
|
}
|
|
|
|
static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
|
|
{
|
|
int ret;
|
|
struct intel_pt *pt = ptq->pt;
|
|
union perf_event *event = ptq->event_buf;
|
|
struct perf_sample sample = { .ip = 0, };
|
|
struct dummy_branch_stack {
|
|
u64 nr;
|
|
struct branch_entry entries;
|
|
} dummy_bs;
|
|
|
|
if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
|
|
return 0;
|
|
|
|
event->sample.header.type = PERF_RECORD_SAMPLE;
|
|
event->sample.header.misc = PERF_RECORD_MISC_USER;
|
|
event->sample.header.size = sizeof(struct perf_event_header);
|
|
|
|
if (!pt->timeless_decoding)
|
|
sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
|
|
|
|
sample.ip = ptq->state->from_ip;
|
|
sample.pid = ptq->pid;
|
|
sample.tid = ptq->tid;
|
|
sample.addr = ptq->state->to_ip;
|
|
sample.id = ptq->pt->branches_id;
|
|
sample.stream_id = ptq->pt->branches_id;
|
|
sample.period = 1;
|
|
sample.cpu = ptq->cpu;
|
|
sample.flags = ptq->flags;
|
|
sample.insn_len = ptq->insn_len;
|
|
|
|
/*
|
|
* perf report cannot handle events without a branch stack when using
|
|
* SORT_MODE__BRANCH so make a dummy one.
|
|
*/
|
|
if (pt->synth_opts.last_branch && sort__mode == SORT_MODE__BRANCH) {
|
|
dummy_bs = (struct dummy_branch_stack){
|
|
.nr = 1,
|
|
.entries = {
|
|
.from = sample.ip,
|
|
.to = sample.addr,
|
|
},
|
|
};
|
|
sample.branch_stack = (struct branch_stack *)&dummy_bs;
|
|
}
|
|
|
|
if (pt->synth_opts.inject) {
|
|
ret = intel_pt_inject_event(event, &sample,
|
|
pt->branches_sample_type,
|
|
pt->synth_needs_swap);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = perf_session__deliver_synth_event(pt->session, event, &sample);
|
|
if (ret)
|
|
pr_err("Intel Processor Trace: failed to deliver branch event, error %d\n",
|
|
ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq)
|
|
{
|
|
int ret;
|
|
struct intel_pt *pt = ptq->pt;
|
|
union perf_event *event = ptq->event_buf;
|
|
struct perf_sample sample = { .ip = 0, };
|
|
|
|
event->sample.header.type = PERF_RECORD_SAMPLE;
|
|
event->sample.header.misc = PERF_RECORD_MISC_USER;
|
|
event->sample.header.size = sizeof(struct perf_event_header);
|
|
|
|
if (!pt->timeless_decoding)
|
|
sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
|
|
|
|
sample.ip = ptq->state->from_ip;
|
|
sample.pid = ptq->pid;
|
|
sample.tid = ptq->tid;
|
|
sample.addr = ptq->state->to_ip;
|
|
sample.id = ptq->pt->instructions_id;
|
|
sample.stream_id = ptq->pt->instructions_id;
|
|
sample.period = ptq->state->tot_insn_cnt - ptq->last_insn_cnt;
|
|
sample.cpu = ptq->cpu;
|
|
sample.flags = ptq->flags;
|
|
sample.insn_len = ptq->insn_len;
|
|
|
|
ptq->last_insn_cnt = ptq->state->tot_insn_cnt;
|
|
|
|
if (pt->synth_opts.callchain) {
|
|
thread_stack__sample(ptq->thread, ptq->chain,
|
|
pt->synth_opts.callchain_sz, sample.ip);
|
|
sample.callchain = ptq->chain;
|
|
}
|
|
|
|
if (pt->synth_opts.last_branch) {
|
|
intel_pt_copy_last_branch_rb(ptq);
|
|
sample.branch_stack = ptq->last_branch;
|
|
}
|
|
|
|
if (pt->synth_opts.inject) {
|
|
ret = intel_pt_inject_event(event, &sample,
|
|
pt->instructions_sample_type,
|
|
pt->synth_needs_swap);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = perf_session__deliver_synth_event(pt->session, event, &sample);
|
|
if (ret)
|
|
pr_err("Intel Processor Trace: failed to deliver instruction event, error %d\n",
|
|
ret);
|
|
|
|
if (pt->synth_opts.last_branch)
|
|
intel_pt_reset_last_branch_rb(ptq);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq)
|
|
{
|
|
int ret;
|
|
struct intel_pt *pt = ptq->pt;
|
|
union perf_event *event = ptq->event_buf;
|
|
struct perf_sample sample = { .ip = 0, };
|
|
|
|
event->sample.header.type = PERF_RECORD_SAMPLE;
|
|
event->sample.header.misc = PERF_RECORD_MISC_USER;
|
|
event->sample.header.size = sizeof(struct perf_event_header);
|
|
|
|
if (!pt->timeless_decoding)
|
|
sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
|
|
|
|
sample.ip = ptq->state->from_ip;
|
|
sample.pid = ptq->pid;
|
|
sample.tid = ptq->tid;
|
|
sample.addr = ptq->state->to_ip;
|
|
sample.id = ptq->pt->transactions_id;
|
|
sample.stream_id = ptq->pt->transactions_id;
|
|
sample.period = 1;
|
|
sample.cpu = ptq->cpu;
|
|
sample.flags = ptq->flags;
|
|
sample.insn_len = ptq->insn_len;
|
|
|
|
if (pt->synth_opts.callchain) {
|
|
thread_stack__sample(ptq->thread, ptq->chain,
|
|
pt->synth_opts.callchain_sz, sample.ip);
|
|
sample.callchain = ptq->chain;
|
|
}
|
|
|
|
if (pt->synth_opts.last_branch) {
|
|
intel_pt_copy_last_branch_rb(ptq);
|
|
sample.branch_stack = ptq->last_branch;
|
|
}
|
|
|
|
if (pt->synth_opts.inject) {
|
|
ret = intel_pt_inject_event(event, &sample,
|
|
pt->transactions_sample_type,
|
|
pt->synth_needs_swap);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = perf_session__deliver_synth_event(pt->session, event, &sample);
|
|
if (ret)
|
|
pr_err("Intel Processor Trace: failed to deliver transaction event, error %d\n",
|
|
ret);
|
|
|
|
if (pt->synth_opts.callchain)
|
|
intel_pt_reset_last_branch_rb(ptq);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
|
|
pid_t pid, pid_t tid, u64 ip)
|
|
{
|
|
union perf_event event;
|
|
char msg[MAX_AUXTRACE_ERROR_MSG];
|
|
int err;
|
|
|
|
intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG);
|
|
|
|
auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
|
|
code, cpu, pid, tid, ip, msg);
|
|
|
|
err = perf_session__deliver_synth_event(pt->session, &event, NULL);
|
|
if (err)
|
|
pr_err("Intel Processor Trace: failed to deliver error event, error %d\n",
|
|
err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int intel_pt_next_tid(struct intel_pt *pt, struct intel_pt_queue *ptq)
|
|
{
|
|
struct auxtrace_queue *queue;
|
|
pid_t tid = ptq->next_tid;
|
|
int err;
|
|
|
|
if (tid == -1)
|
|
return 0;
|
|
|
|
intel_pt_log("switch: cpu %d tid %d\n", ptq->cpu, tid);
|
|
|
|
err = machine__set_current_tid(pt->machine, ptq->cpu, -1, tid);
|
|
|
|
queue = &pt->queues.queue_array[ptq->queue_nr];
|
|
intel_pt_set_pid_tid_cpu(pt, queue);
|
|
|
|
ptq->next_tid = -1;
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline bool intel_pt_is_switch_ip(struct intel_pt_queue *ptq, u64 ip)
|
|
{
|
|
struct intel_pt *pt = ptq->pt;
|
|
|
|
return ip == pt->switch_ip &&
|
|
(ptq->flags & PERF_IP_FLAG_BRANCH) &&
|
|
!(ptq->flags & (PERF_IP_FLAG_CONDITIONAL | PERF_IP_FLAG_ASYNC |
|
|
PERF_IP_FLAG_INTERRUPT | PERF_IP_FLAG_TX_ABORT));
|
|
}
|
|
|
|
static int intel_pt_sample(struct intel_pt_queue *ptq)
|
|
{
|
|
const struct intel_pt_state *state = ptq->state;
|
|
struct intel_pt *pt = ptq->pt;
|
|
int err;
|
|
|
|
if (!ptq->have_sample)
|
|
return 0;
|
|
|
|
ptq->have_sample = false;
|
|
|
|
if (pt->sample_instructions &&
|
|
(state->type & INTEL_PT_INSTRUCTION)) {
|
|
err = intel_pt_synth_instruction_sample(ptq);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (pt->sample_transactions &&
|
|
(state->type & INTEL_PT_TRANSACTION)) {
|
|
err = intel_pt_synth_transaction_sample(ptq);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (!(state->type & INTEL_PT_BRANCH))
|
|
return 0;
|
|
|
|
if (pt->synth_opts.callchain)
|
|
thread_stack__event(ptq->thread, ptq->flags, state->from_ip,
|
|
state->to_ip, ptq->insn_len,
|
|
state->trace_nr);
|
|
else
|
|
thread_stack__set_trace_nr(ptq->thread, state->trace_nr);
|
|
|
|
if (pt->sample_branches) {
|
|
err = intel_pt_synth_branch_sample(ptq);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (pt->synth_opts.last_branch)
|
|
intel_pt_update_last_branch_rb(ptq);
|
|
|
|
if (!pt->sync_switch)
|
|
return 0;
|
|
|
|
if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
|
|
switch (ptq->switch_state) {
|
|
case INTEL_PT_SS_UNKNOWN:
|
|
case INTEL_PT_SS_EXPECTING_SWITCH_IP:
|
|
err = intel_pt_next_tid(pt, ptq);
|
|
if (err)
|
|
return err;
|
|
ptq->switch_state = INTEL_PT_SS_TRACING;
|
|
break;
|
|
default:
|
|
ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_EVENT;
|
|
return 1;
|
|
}
|
|
} else if (!state->to_ip) {
|
|
ptq->switch_state = INTEL_PT_SS_NOT_TRACING;
|
|
} else if (ptq->switch_state == INTEL_PT_SS_NOT_TRACING) {
|
|
ptq->switch_state = INTEL_PT_SS_UNKNOWN;
|
|
} else if (ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
|
|
state->to_ip == pt->ptss_ip &&
|
|
(ptq->flags & PERF_IP_FLAG_CALL)) {
|
|
ptq->switch_state = INTEL_PT_SS_TRACING;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 intel_pt_switch_ip(struct intel_pt *pt, u64 *ptss_ip)
|
|
{
|
|
struct machine *machine = pt->machine;
|
|
struct map *map;
|
|
struct symbol *sym, *start;
|
|
u64 ip, switch_ip = 0;
|
|
const char *ptss;
|
|
|
|
if (ptss_ip)
|
|
*ptss_ip = 0;
|
|
|
|
map = machine__kernel_map(machine);
|
|
if (!map)
|
|
return 0;
|
|
|
|
if (map__load(map, machine->symbol_filter))
|
|
return 0;
|
|
|
|
start = dso__first_symbol(map->dso, MAP__FUNCTION);
|
|
|
|
for (sym = start; sym; sym = dso__next_symbol(sym)) {
|
|
if (sym->binding == STB_GLOBAL &&
|
|
!strcmp(sym->name, "__switch_to")) {
|
|
ip = map->unmap_ip(map, sym->start);
|
|
if (ip >= map->start && ip < map->end) {
|
|
switch_ip = ip;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!switch_ip || !ptss_ip)
|
|
return 0;
|
|
|
|
if (pt->have_sched_switch == 1)
|
|
ptss = "perf_trace_sched_switch";
|
|
else
|
|
ptss = "__perf_event_task_sched_out";
|
|
|
|
for (sym = start; sym; sym = dso__next_symbol(sym)) {
|
|
if (!strcmp(sym->name, ptss)) {
|
|
ip = map->unmap_ip(map, sym->start);
|
|
if (ip >= map->start && ip < map->end) {
|
|
*ptss_ip = ip;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return switch_ip;
|
|
}
|
|
|
|
static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp)
|
|
{
|
|
const struct intel_pt_state *state = ptq->state;
|
|
struct intel_pt *pt = ptq->pt;
|
|
int err;
|
|
|
|
if (!pt->kernel_start) {
|
|
pt->kernel_start = machine__kernel_start(pt->machine);
|
|
if (pt->per_cpu_mmaps &&
|
|
(pt->have_sched_switch == 1 || pt->have_sched_switch == 3) &&
|
|
!pt->timeless_decoding && intel_pt_tracing_kernel(pt) &&
|
|
!pt->sampling_mode) {
|
|
pt->switch_ip = intel_pt_switch_ip(pt, &pt->ptss_ip);
|
|
if (pt->switch_ip) {
|
|
intel_pt_log("switch_ip: %"PRIx64" ptss_ip: %"PRIx64"\n",
|
|
pt->switch_ip, pt->ptss_ip);
|
|
pt->sync_switch = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
|
|
ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
|
|
while (1) {
|
|
err = intel_pt_sample(ptq);
|
|
if (err)
|
|
return err;
|
|
|
|
state = intel_pt_decode(ptq->decoder);
|
|
if (state->err) {
|
|
if (state->err == INTEL_PT_ERR_NODATA)
|
|
return 1;
|
|
if (pt->sync_switch &&
|
|
state->from_ip >= pt->kernel_start) {
|
|
pt->sync_switch = false;
|
|
intel_pt_next_tid(pt, ptq);
|
|
}
|
|
if (pt->synth_opts.errors) {
|
|
err = intel_pt_synth_error(pt, state->err,
|
|
ptq->cpu, ptq->pid,
|
|
ptq->tid,
|
|
state->from_ip);
|
|
if (err)
|
|
return err;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
ptq->state = state;
|
|
ptq->have_sample = true;
|
|
intel_pt_sample_flags(ptq);
|
|
|
|
/* Use estimated TSC upon return to user space */
|
|
if (pt->est_tsc &&
|
|
(state->from_ip >= pt->kernel_start || !state->from_ip) &&
|
|
state->to_ip && state->to_ip < pt->kernel_start) {
|
|
intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
|
|
state->timestamp, state->est_timestamp);
|
|
ptq->timestamp = state->est_timestamp;
|
|
/* Use estimated TSC in unknown switch state */
|
|
} else if (pt->sync_switch &&
|
|
ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
|
|
intel_pt_is_switch_ip(ptq, state->to_ip) &&
|
|
ptq->next_tid == -1) {
|
|
intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
|
|
state->timestamp, state->est_timestamp);
|
|
ptq->timestamp = state->est_timestamp;
|
|
} else if (state->timestamp > ptq->timestamp) {
|
|
ptq->timestamp = state->timestamp;
|
|
}
|
|
|
|
if (!pt->timeless_decoding && ptq->timestamp >= *timestamp) {
|
|
*timestamp = ptq->timestamp;
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int intel_pt_update_queues(struct intel_pt *pt)
|
|
{
|
|
if (pt->queues.new_data) {
|
|
pt->queues.new_data = false;
|
|
return intel_pt_setup_queues(pt);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int intel_pt_process_queues(struct intel_pt *pt, u64 timestamp)
|
|
{
|
|
unsigned int queue_nr;
|
|
u64 ts;
|
|
int ret;
|
|
|
|
while (1) {
|
|
struct auxtrace_queue *queue;
|
|
struct intel_pt_queue *ptq;
|
|
|
|
if (!pt->heap.heap_cnt)
|
|
return 0;
|
|
|
|
if (pt->heap.heap_array[0].ordinal >= timestamp)
|
|
return 0;
|
|
|
|
queue_nr = pt->heap.heap_array[0].queue_nr;
|
|
queue = &pt->queues.queue_array[queue_nr];
|
|
ptq = queue->priv;
|
|
|
|
intel_pt_log("queue %u processing 0x%" PRIx64 " to 0x%" PRIx64 "\n",
|
|
queue_nr, pt->heap.heap_array[0].ordinal,
|
|
timestamp);
|
|
|
|
auxtrace_heap__pop(&pt->heap);
|
|
|
|
if (pt->heap.heap_cnt) {
|
|
ts = pt->heap.heap_array[0].ordinal + 1;
|
|
if (ts > timestamp)
|
|
ts = timestamp;
|
|
} else {
|
|
ts = timestamp;
|
|
}
|
|
|
|
intel_pt_set_pid_tid_cpu(pt, queue);
|
|
|
|
ret = intel_pt_run_decoder(ptq, &ts);
|
|
|
|
if (ret < 0) {
|
|
auxtrace_heap__add(&pt->heap, queue_nr, ts);
|
|
return ret;
|
|
}
|
|
|
|
if (!ret) {
|
|
ret = auxtrace_heap__add(&pt->heap, queue_nr, ts);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
ptq->on_heap = false;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_pt_process_timeless_queues(struct intel_pt *pt, pid_t tid,
|
|
u64 time_)
|
|
{
|
|
struct auxtrace_queues *queues = &pt->queues;
|
|
unsigned int i;
|
|
u64 ts = 0;
|
|
|
|
for (i = 0; i < queues->nr_queues; i++) {
|
|
struct auxtrace_queue *queue = &pt->queues.queue_array[i];
|
|
struct intel_pt_queue *ptq = queue->priv;
|
|
|
|
if (ptq && (tid == -1 || ptq->tid == tid)) {
|
|
ptq->time = time_;
|
|
intel_pt_set_pid_tid_cpu(pt, queue);
|
|
intel_pt_run_decoder(ptq, &ts);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int intel_pt_lost(struct intel_pt *pt, struct perf_sample *sample)
|
|
{
|
|
return intel_pt_synth_error(pt, INTEL_PT_ERR_LOST, sample->cpu,
|
|
sample->pid, sample->tid, 0);
|
|
}
|
|
|
|
static struct intel_pt_queue *intel_pt_cpu_to_ptq(struct intel_pt *pt, int cpu)
|
|
{
|
|
unsigned i, j;
|
|
|
|
if (cpu < 0 || !pt->queues.nr_queues)
|
|
return NULL;
|
|
|
|
if ((unsigned)cpu >= pt->queues.nr_queues)
|
|
i = pt->queues.nr_queues - 1;
|
|
else
|
|
i = cpu;
|
|
|
|
if (pt->queues.queue_array[i].cpu == cpu)
|
|
return pt->queues.queue_array[i].priv;
|
|
|
|
for (j = 0; i > 0; j++) {
|
|
if (pt->queues.queue_array[--i].cpu == cpu)
|
|
return pt->queues.queue_array[i].priv;
|
|
}
|
|
|
|
for (; j < pt->queues.nr_queues; j++) {
|
|
if (pt->queues.queue_array[j].cpu == cpu)
|
|
return pt->queues.queue_array[j].priv;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int intel_pt_sync_switch(struct intel_pt *pt, int cpu, pid_t tid,
|
|
u64 timestamp)
|
|
{
|
|
struct intel_pt_queue *ptq;
|
|
int err;
|
|
|
|
if (!pt->sync_switch)
|
|
return 1;
|
|
|
|
ptq = intel_pt_cpu_to_ptq(pt, cpu);
|
|
if (!ptq)
|
|
return 1;
|
|
|
|
switch (ptq->switch_state) {
|
|
case INTEL_PT_SS_NOT_TRACING:
|
|
ptq->next_tid = -1;
|
|
break;
|
|
case INTEL_PT_SS_UNKNOWN:
|
|
case INTEL_PT_SS_TRACING:
|
|
ptq->next_tid = tid;
|
|
ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_IP;
|
|
return 0;
|
|
case INTEL_PT_SS_EXPECTING_SWITCH_EVENT:
|
|
if (!ptq->on_heap) {
|
|
ptq->timestamp = perf_time_to_tsc(timestamp,
|
|
&pt->tc);
|
|
err = auxtrace_heap__add(&pt->heap, ptq->queue_nr,
|
|
ptq->timestamp);
|
|
if (err)
|
|
return err;
|
|
ptq->on_heap = true;
|
|
}
|
|
ptq->switch_state = INTEL_PT_SS_TRACING;
|
|
break;
|
|
case INTEL_PT_SS_EXPECTING_SWITCH_IP:
|
|
ptq->next_tid = tid;
|
|
intel_pt_log("ERROR: cpu %d expecting switch ip\n", cpu);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int intel_pt_process_switch(struct intel_pt *pt,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
pid_t tid;
|
|
int cpu, ret;
|
|
|
|
evsel = perf_evlist__id2evsel(pt->session->evlist, sample->id);
|
|
if (evsel != pt->switch_evsel)
|
|
return 0;
|
|
|
|
tid = perf_evsel__intval(evsel, sample, "next_pid");
|
|
cpu = sample->cpu;
|
|
|
|
intel_pt_log("sched_switch: cpu %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
|
|
cpu, tid, sample->time, perf_time_to_tsc(sample->time,
|
|
&pt->tc));
|
|
|
|
ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
|
|
if (ret <= 0)
|
|
return ret;
|
|
|
|
return machine__set_current_tid(pt->machine, cpu, -1, tid);
|
|
}
|
|
|
|
static int intel_pt_context_switch(struct intel_pt *pt, union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
|
|
pid_t pid, tid;
|
|
int cpu, ret;
|
|
|
|
cpu = sample->cpu;
|
|
|
|
if (pt->have_sched_switch == 3) {
|
|
if (!out)
|
|
return 0;
|
|
if (event->header.type != PERF_RECORD_SWITCH_CPU_WIDE) {
|
|
pr_err("Expecting CPU-wide context switch event\n");
|
|
return -EINVAL;
|
|
}
|
|
pid = event->context_switch.next_prev_pid;
|
|
tid = event->context_switch.next_prev_tid;
|
|
} else {
|
|
if (out)
|
|
return 0;
|
|
pid = sample->pid;
|
|
tid = sample->tid;
|
|
}
|
|
|
|
if (tid == -1) {
|
|
pr_err("context_switch event has no tid\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
intel_pt_log("context_switch: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
|
|
cpu, pid, tid, sample->time, perf_time_to_tsc(sample->time,
|
|
&pt->tc));
|
|
|
|
ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
|
|
if (ret <= 0)
|
|
return ret;
|
|
|
|
return machine__set_current_tid(pt->machine, cpu, pid, tid);
|
|
}
|
|
|
|
static int intel_pt_process_itrace_start(struct intel_pt *pt,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
if (!pt->per_cpu_mmaps)
|
|
return 0;
|
|
|
|
intel_pt_log("itrace_start: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
|
|
sample->cpu, event->itrace_start.pid,
|
|
event->itrace_start.tid, sample->time,
|
|
perf_time_to_tsc(sample->time, &pt->tc));
|
|
|
|
return machine__set_current_tid(pt->machine, sample->cpu,
|
|
event->itrace_start.pid,
|
|
event->itrace_start.tid);
|
|
}
|
|
|
|
static int intel_pt_process_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_tool *tool)
|
|
{
|
|
struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
|
|
auxtrace);
|
|
u64 timestamp;
|
|
int err = 0;
|
|
|
|
if (dump_trace)
|
|
return 0;
|
|
|
|
if (!tool->ordered_events) {
|
|
pr_err("Intel Processor Trace requires ordered events\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (sample->time && sample->time != (u64)-1)
|
|
timestamp = perf_time_to_tsc(sample->time, &pt->tc);
|
|
else
|
|
timestamp = 0;
|
|
|
|
if (timestamp || pt->timeless_decoding) {
|
|
err = intel_pt_update_queues(pt);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (pt->timeless_decoding) {
|
|
if (event->header.type == PERF_RECORD_EXIT) {
|
|
err = intel_pt_process_timeless_queues(pt,
|
|
event->fork.tid,
|
|
sample->time);
|
|
}
|
|
} else if (timestamp) {
|
|
err = intel_pt_process_queues(pt, timestamp);
|
|
}
|
|
if (err)
|
|
return err;
|
|
|
|
if (event->header.type == PERF_RECORD_AUX &&
|
|
(event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
|
|
pt->synth_opts.errors) {
|
|
err = intel_pt_lost(pt, sample);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (pt->switch_evsel && event->header.type == PERF_RECORD_SAMPLE)
|
|
err = intel_pt_process_switch(pt, sample);
|
|
else if (event->header.type == PERF_RECORD_ITRACE_START)
|
|
err = intel_pt_process_itrace_start(pt, event, sample);
|
|
else if (event->header.type == PERF_RECORD_SWITCH ||
|
|
event->header.type == PERF_RECORD_SWITCH_CPU_WIDE)
|
|
err = intel_pt_context_switch(pt, event, sample);
|
|
|
|
intel_pt_log("event %s (%u): cpu %d time %"PRIu64" tsc %#"PRIx64"\n",
|
|
perf_event__name(event->header.type), event->header.type,
|
|
sample->cpu, sample->time, timestamp);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int intel_pt_flush(struct perf_session *session, struct perf_tool *tool)
|
|
{
|
|
struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
|
|
auxtrace);
|
|
int ret;
|
|
|
|
if (dump_trace)
|
|
return 0;
|
|
|
|
if (!tool->ordered_events)
|
|
return -EINVAL;
|
|
|
|
ret = intel_pt_update_queues(pt);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (pt->timeless_decoding)
|
|
return intel_pt_process_timeless_queues(pt, -1,
|
|
MAX_TIMESTAMP - 1);
|
|
|
|
return intel_pt_process_queues(pt, MAX_TIMESTAMP);
|
|
}
|
|
|
|
static void intel_pt_free_events(struct perf_session *session)
|
|
{
|
|
struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
|
|
auxtrace);
|
|
struct auxtrace_queues *queues = &pt->queues;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < queues->nr_queues; i++) {
|
|
intel_pt_free_queue(queues->queue_array[i].priv);
|
|
queues->queue_array[i].priv = NULL;
|
|
}
|
|
intel_pt_log_disable();
|
|
auxtrace_queues__free(queues);
|
|
}
|
|
|
|
static void intel_pt_free(struct perf_session *session)
|
|
{
|
|
struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
|
|
auxtrace);
|
|
|
|
auxtrace_heap__free(&pt->heap);
|
|
intel_pt_free_events(session);
|
|
session->auxtrace = NULL;
|
|
thread__delete(pt->unknown_thread);
|
|
free(pt);
|
|
}
|
|
|
|
static int intel_pt_process_auxtrace_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_tool *tool __maybe_unused)
|
|
{
|
|
struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
|
|
auxtrace);
|
|
|
|
if (pt->sampling_mode)
|
|
return 0;
|
|
|
|
if (!pt->data_queued) {
|
|
struct auxtrace_buffer *buffer;
|
|
off_t data_offset;
|
|
int fd = perf_data_file__fd(session->file);
|
|
int err;
|
|
|
|
if (perf_data_file__is_pipe(session->file)) {
|
|
data_offset = 0;
|
|
} else {
|
|
data_offset = lseek(fd, 0, SEEK_CUR);
|
|
if (data_offset == -1)
|
|
return -errno;
|
|
}
|
|
|
|
err = auxtrace_queues__add_event(&pt->queues, session, event,
|
|
data_offset, &buffer);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Dump here now we have copied a piped trace out of the pipe */
|
|
if (dump_trace) {
|
|
if (auxtrace_buffer__get_data(buffer, fd)) {
|
|
intel_pt_dump_event(pt, buffer->data,
|
|
buffer->size);
|
|
auxtrace_buffer__put_data(buffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct intel_pt_synth {
|
|
struct perf_tool dummy_tool;
|
|
struct perf_session *session;
|
|
};
|
|
|
|
static int intel_pt_event_synth(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample __maybe_unused,
|
|
struct machine *machine __maybe_unused)
|
|
{
|
|
struct intel_pt_synth *intel_pt_synth =
|
|
container_of(tool, struct intel_pt_synth, dummy_tool);
|
|
|
|
return perf_session__deliver_synth_event(intel_pt_synth->session, event,
|
|
NULL);
|
|
}
|
|
|
|
static int intel_pt_synth_event(struct perf_session *session,
|
|
struct perf_event_attr *attr, u64 id)
|
|
{
|
|
struct intel_pt_synth intel_pt_synth;
|
|
|
|
memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth));
|
|
intel_pt_synth.session = session;
|
|
|
|
return perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1,
|
|
&id, intel_pt_event_synth);
|
|
}
|
|
|
|
static int intel_pt_synth_events(struct intel_pt *pt,
|
|
struct perf_session *session)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct perf_evsel *evsel;
|
|
struct perf_event_attr attr;
|
|
bool found = false;
|
|
u64 id;
|
|
int err;
|
|
|
|
evlist__for_each(evlist, evsel) {
|
|
if (evsel->attr.type == pt->pmu_type && evsel->ids) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
pr_debug("There are no selected events with Intel Processor Trace data\n");
|
|
return 0;
|
|
}
|
|
|
|
memset(&attr, 0, sizeof(struct perf_event_attr));
|
|
attr.size = sizeof(struct perf_event_attr);
|
|
attr.type = PERF_TYPE_HARDWARE;
|
|
attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK;
|
|
attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
|
|
PERF_SAMPLE_PERIOD;
|
|
if (pt->timeless_decoding)
|
|
attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
|
|
else
|
|
attr.sample_type |= PERF_SAMPLE_TIME;
|
|
if (!pt->per_cpu_mmaps)
|
|
attr.sample_type &= ~(u64)PERF_SAMPLE_CPU;
|
|
attr.exclude_user = evsel->attr.exclude_user;
|
|
attr.exclude_kernel = evsel->attr.exclude_kernel;
|
|
attr.exclude_hv = evsel->attr.exclude_hv;
|
|
attr.exclude_host = evsel->attr.exclude_host;
|
|
attr.exclude_guest = evsel->attr.exclude_guest;
|
|
attr.sample_id_all = evsel->attr.sample_id_all;
|
|
attr.read_format = evsel->attr.read_format;
|
|
|
|
id = evsel->id[0] + 1000000000;
|
|
if (!id)
|
|
id = 1;
|
|
|
|
if (pt->synth_opts.instructions) {
|
|
attr.config = PERF_COUNT_HW_INSTRUCTIONS;
|
|
if (pt->synth_opts.period_type == PERF_ITRACE_PERIOD_NANOSECS)
|
|
attr.sample_period =
|
|
intel_pt_ns_to_ticks(pt, pt->synth_opts.period);
|
|
else
|
|
attr.sample_period = pt->synth_opts.period;
|
|
pt->instructions_sample_period = attr.sample_period;
|
|
if (pt->synth_opts.callchain)
|
|
attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
|
|
if (pt->synth_opts.last_branch)
|
|
attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
|
|
pr_debug("Synthesizing 'instructions' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
|
|
id, (u64)attr.sample_type);
|
|
err = intel_pt_synth_event(session, &attr, id);
|
|
if (err) {
|
|
pr_err("%s: failed to synthesize 'instructions' event type\n",
|
|
__func__);
|
|
return err;
|
|
}
|
|
pt->sample_instructions = true;
|
|
pt->instructions_sample_type = attr.sample_type;
|
|
pt->instructions_id = id;
|
|
id += 1;
|
|
}
|
|
|
|
if (pt->synth_opts.transactions) {
|
|
attr.config = PERF_COUNT_HW_INSTRUCTIONS;
|
|
attr.sample_period = 1;
|
|
if (pt->synth_opts.callchain)
|
|
attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
|
|
if (pt->synth_opts.last_branch)
|
|
attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
|
|
pr_debug("Synthesizing 'transactions' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
|
|
id, (u64)attr.sample_type);
|
|
err = intel_pt_synth_event(session, &attr, id);
|
|
if (err) {
|
|
pr_err("%s: failed to synthesize 'transactions' event type\n",
|
|
__func__);
|
|
return err;
|
|
}
|
|
pt->sample_transactions = true;
|
|
pt->transactions_id = id;
|
|
id += 1;
|
|
evlist__for_each(evlist, evsel) {
|
|
if (evsel->id && evsel->id[0] == pt->transactions_id) {
|
|
if (evsel->name)
|
|
zfree(&evsel->name);
|
|
evsel->name = strdup("transactions");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pt->synth_opts.branches) {
|
|
attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
|
|
attr.sample_period = 1;
|
|
attr.sample_type |= PERF_SAMPLE_ADDR;
|
|
attr.sample_type &= ~(u64)PERF_SAMPLE_CALLCHAIN;
|
|
attr.sample_type &= ~(u64)PERF_SAMPLE_BRANCH_STACK;
|
|
pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
|
|
id, (u64)attr.sample_type);
|
|
err = intel_pt_synth_event(session, &attr, id);
|
|
if (err) {
|
|
pr_err("%s: failed to synthesize 'branches' event type\n",
|
|
__func__);
|
|
return err;
|
|
}
|
|
pt->sample_branches = true;
|
|
pt->branches_sample_type = attr.sample_type;
|
|
pt->branches_id = id;
|
|
}
|
|
|
|
pt->synth_needs_swap = evsel->needs_swap;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct perf_evsel *intel_pt_find_sched_switch(struct perf_evlist *evlist)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each_reverse(evlist, evsel) {
|
|
const char *name = perf_evsel__name(evsel);
|
|
|
|
if (!strcmp(name, "sched:sched_switch"))
|
|
return evsel;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static bool intel_pt_find_switch(struct perf_evlist *evlist)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each(evlist, evsel) {
|
|
if (evsel->attr.context_switch)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int intel_pt_perf_config(const char *var, const char *value, void *data)
|
|
{
|
|
struct intel_pt *pt = data;
|
|
|
|
if (!strcmp(var, "intel-pt.mispred-all"))
|
|
pt->mispred_all = perf_config_bool(var, value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const intel_pt_info_fmts[] = {
|
|
[INTEL_PT_PMU_TYPE] = " PMU Type %"PRId64"\n",
|
|
[INTEL_PT_TIME_SHIFT] = " Time Shift %"PRIu64"\n",
|
|
[INTEL_PT_TIME_MULT] = " Time Muliplier %"PRIu64"\n",
|
|
[INTEL_PT_TIME_ZERO] = " Time Zero %"PRIu64"\n",
|
|
[INTEL_PT_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n",
|
|
[INTEL_PT_TSC_BIT] = " TSC bit %#"PRIx64"\n",
|
|
[INTEL_PT_NORETCOMP_BIT] = " NoRETComp bit %#"PRIx64"\n",
|
|
[INTEL_PT_HAVE_SCHED_SWITCH] = " Have sched_switch %"PRId64"\n",
|
|
[INTEL_PT_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n",
|
|
[INTEL_PT_PER_CPU_MMAPS] = " Per-cpu maps %"PRId64"\n",
|
|
[INTEL_PT_MTC_BIT] = " MTC bit %#"PRIx64"\n",
|
|
[INTEL_PT_TSC_CTC_N] = " TSC:CTC numerator %"PRIu64"\n",
|
|
[INTEL_PT_TSC_CTC_D] = " TSC:CTC denominator %"PRIu64"\n",
|
|
[INTEL_PT_CYC_BIT] = " CYC bit %#"PRIx64"\n",
|
|
};
|
|
|
|
static void intel_pt_print_info(u64 *arr, int start, int finish)
|
|
{
|
|
int i;
|
|
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
for (i = start; i <= finish; i++)
|
|
fprintf(stdout, intel_pt_info_fmts[i], arr[i]);
|
|
}
|
|
|
|
int intel_pt_process_auxtrace_info(union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
|
|
size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS;
|
|
struct intel_pt *pt;
|
|
int err;
|
|
|
|
if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
|
|
min_sz)
|
|
return -EINVAL;
|
|
|
|
pt = zalloc(sizeof(struct intel_pt));
|
|
if (!pt)
|
|
return -ENOMEM;
|
|
|
|
perf_config(intel_pt_perf_config, pt);
|
|
|
|
err = auxtrace_queues__init(&pt->queues);
|
|
if (err)
|
|
goto err_free;
|
|
|
|
intel_pt_log_set_name(INTEL_PT_PMU_NAME);
|
|
|
|
pt->session = session;
|
|
pt->machine = &session->machines.host; /* No kvm support */
|
|
pt->auxtrace_type = auxtrace_info->type;
|
|
pt->pmu_type = auxtrace_info->priv[INTEL_PT_PMU_TYPE];
|
|
pt->tc.time_shift = auxtrace_info->priv[INTEL_PT_TIME_SHIFT];
|
|
pt->tc.time_mult = auxtrace_info->priv[INTEL_PT_TIME_MULT];
|
|
pt->tc.time_zero = auxtrace_info->priv[INTEL_PT_TIME_ZERO];
|
|
pt->cap_user_time_zero = auxtrace_info->priv[INTEL_PT_CAP_USER_TIME_ZERO];
|
|
pt->tsc_bit = auxtrace_info->priv[INTEL_PT_TSC_BIT];
|
|
pt->noretcomp_bit = auxtrace_info->priv[INTEL_PT_NORETCOMP_BIT];
|
|
pt->have_sched_switch = auxtrace_info->priv[INTEL_PT_HAVE_SCHED_SWITCH];
|
|
pt->snapshot_mode = auxtrace_info->priv[INTEL_PT_SNAPSHOT_MODE];
|
|
pt->per_cpu_mmaps = auxtrace_info->priv[INTEL_PT_PER_CPU_MMAPS];
|
|
intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_PMU_TYPE,
|
|
INTEL_PT_PER_CPU_MMAPS);
|
|
|
|
if (auxtrace_info->header.size >= sizeof(struct auxtrace_info_event) +
|
|
(sizeof(u64) * INTEL_PT_CYC_BIT)) {
|
|
pt->mtc_bit = auxtrace_info->priv[INTEL_PT_MTC_BIT];
|
|
pt->mtc_freq_bits = auxtrace_info->priv[INTEL_PT_MTC_FREQ_BITS];
|
|
pt->tsc_ctc_ratio_n = auxtrace_info->priv[INTEL_PT_TSC_CTC_N];
|
|
pt->tsc_ctc_ratio_d = auxtrace_info->priv[INTEL_PT_TSC_CTC_D];
|
|
pt->cyc_bit = auxtrace_info->priv[INTEL_PT_CYC_BIT];
|
|
intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_MTC_BIT,
|
|
INTEL_PT_CYC_BIT);
|
|
}
|
|
|
|
pt->timeless_decoding = intel_pt_timeless_decoding(pt);
|
|
pt->have_tsc = intel_pt_have_tsc(pt);
|
|
pt->sampling_mode = false;
|
|
pt->est_tsc = !pt->timeless_decoding;
|
|
|
|
pt->unknown_thread = thread__new(999999999, 999999999);
|
|
if (!pt->unknown_thread) {
|
|
err = -ENOMEM;
|
|
goto err_free_queues;
|
|
}
|
|
err = thread__set_comm(pt->unknown_thread, "unknown", 0);
|
|
if (err)
|
|
goto err_delete_thread;
|
|
if (thread__init_map_groups(pt->unknown_thread, pt->machine)) {
|
|
err = -ENOMEM;
|
|
goto err_delete_thread;
|
|
}
|
|
|
|
pt->auxtrace.process_event = intel_pt_process_event;
|
|
pt->auxtrace.process_auxtrace_event = intel_pt_process_auxtrace_event;
|
|
pt->auxtrace.flush_events = intel_pt_flush;
|
|
pt->auxtrace.free_events = intel_pt_free_events;
|
|
pt->auxtrace.free = intel_pt_free;
|
|
session->auxtrace = &pt->auxtrace;
|
|
|
|
if (dump_trace)
|
|
return 0;
|
|
|
|
if (pt->have_sched_switch == 1) {
|
|
pt->switch_evsel = intel_pt_find_sched_switch(session->evlist);
|
|
if (!pt->switch_evsel) {
|
|
pr_err("%s: missing sched_switch event\n", __func__);
|
|
goto err_delete_thread;
|
|
}
|
|
} else if (pt->have_sched_switch == 2 &&
|
|
!intel_pt_find_switch(session->evlist)) {
|
|
pr_err("%s: missing context_switch attribute flag\n", __func__);
|
|
goto err_delete_thread;
|
|
}
|
|
|
|
if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
|
|
pt->synth_opts = *session->itrace_synth_opts;
|
|
} else {
|
|
itrace_synth_opts__set_default(&pt->synth_opts);
|
|
if (use_browser != -1) {
|
|
pt->synth_opts.branches = false;
|
|
pt->synth_opts.callchain = true;
|
|
}
|
|
}
|
|
|
|
if (pt->synth_opts.log)
|
|
intel_pt_log_enable();
|
|
|
|
/* Maximum non-turbo ratio is TSC freq / 100 MHz */
|
|
if (pt->tc.time_mult) {
|
|
u64 tsc_freq = intel_pt_ns_to_ticks(pt, 1000000000);
|
|
|
|
pt->max_non_turbo_ratio = (tsc_freq + 50000000) / 100000000;
|
|
intel_pt_log("TSC frequency %"PRIu64"\n", tsc_freq);
|
|
intel_pt_log("Maximum non-turbo ratio %u\n",
|
|
pt->max_non_turbo_ratio);
|
|
}
|
|
|
|
if (pt->synth_opts.calls)
|
|
pt->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
|
|
PERF_IP_FLAG_TRACE_END;
|
|
if (pt->synth_opts.returns)
|
|
pt->branches_filter |= PERF_IP_FLAG_RETURN |
|
|
PERF_IP_FLAG_TRACE_BEGIN;
|
|
|
|
if (pt->synth_opts.callchain && !symbol_conf.use_callchain) {
|
|
symbol_conf.use_callchain = true;
|
|
if (callchain_register_param(&callchain_param) < 0) {
|
|
symbol_conf.use_callchain = false;
|
|
pt->synth_opts.callchain = false;
|
|
}
|
|
}
|
|
|
|
err = intel_pt_synth_events(pt, session);
|
|
if (err)
|
|
goto err_delete_thread;
|
|
|
|
err = auxtrace_queues__process_index(&pt->queues, session);
|
|
if (err)
|
|
goto err_delete_thread;
|
|
|
|
if (pt->queues.populated)
|
|
pt->data_queued = true;
|
|
|
|
if (pt->timeless_decoding)
|
|
pr_debug2("Intel PT decoding without timestamps\n");
|
|
|
|
return 0;
|
|
|
|
err_delete_thread:
|
|
thread__delete(pt->unknown_thread);
|
|
err_free_queues:
|
|
intel_pt_log_disable();
|
|
auxtrace_queues__free(&pt->queues);
|
|
session->auxtrace = NULL;
|
|
err_free:
|
|
free(pt);
|
|
return err;
|
|
}
|