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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
It was returning the searched map just on the addr_location passed, with the function itself returning void. Make it return the map so that we can make the code more compact. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-tzlrrzdeoof4i6ktyqv1t6ks@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
945 lines
23 KiB
C
945 lines
23 KiB
C
/*
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* intel-bts.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 <endian.h>
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#include <errno.h>
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#include <byteswap.h>
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#include <inttypes.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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#include "cpumap.h"
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#include "color.h"
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#include "evsel.h"
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#include "evlist.h"
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#include "machine.h"
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#include "session.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 "debug.h"
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#include "tsc.h"
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#include "auxtrace.h"
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#include "intel-pt-decoder/intel-pt-insn-decoder.h"
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#include "intel-bts.h"
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#define MAX_TIMESTAMP (~0ULL)
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#define INTEL_BTS_ERR_NOINSN 5
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#define INTEL_BTS_ERR_LOST 9
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define le64_to_cpu bswap_64
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#else
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#define le64_to_cpu
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#endif
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struct intel_bts {
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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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bool sampling_mode;
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bool snapshot_mode;
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bool data_queued;
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u32 pmu_type;
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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_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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size_t branches_event_size;
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unsigned long num_events;
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};
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struct intel_bts_queue {
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struct intel_bts *bts;
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unsigned int queue_nr;
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struct auxtrace_buffer *buffer;
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bool on_heap;
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bool done;
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pid_t pid;
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pid_t tid;
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int cpu;
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u64 time;
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struct intel_pt_insn intel_pt_insn;
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u32 sample_flags;
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};
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struct branch {
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u64 from;
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u64 to;
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u64 misc;
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};
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static void intel_bts_dump(struct intel_bts *bts __maybe_unused,
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unsigned char *buf, size_t len)
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{
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struct branch *branch;
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size_t i, pos = 0, br_sz = sizeof(struct branch), sz;
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const char *color = PERF_COLOR_BLUE;
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color_fprintf(stdout, color,
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". ... Intel BTS data: size %zu bytes\n",
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len);
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while (len) {
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if (len >= br_sz)
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sz = br_sz;
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else
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sz = len;
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printf(".");
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color_fprintf(stdout, color, " %08x: ", pos);
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for (i = 0; i < sz; i++)
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color_fprintf(stdout, color, " %02x", buf[i]);
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for (; i < br_sz; i++)
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color_fprintf(stdout, color, " ");
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if (len >= br_sz) {
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branch = (struct branch *)buf;
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color_fprintf(stdout, color, " %"PRIx64" -> %"PRIx64" %s\n",
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le64_to_cpu(branch->from),
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le64_to_cpu(branch->to),
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le64_to_cpu(branch->misc) & 0x10 ?
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"pred" : "miss");
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} else {
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color_fprintf(stdout, color, " Bad record!\n");
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}
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pos += sz;
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buf += sz;
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len -= sz;
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}
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}
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static void intel_bts_dump_event(struct intel_bts *bts, 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_bts_dump(bts, buf, len);
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}
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static int intel_bts_lost(struct intel_bts *bts, struct perf_sample *sample)
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{
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union perf_event event;
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int err;
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auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
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INTEL_BTS_ERR_LOST, sample->cpu, sample->pid,
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sample->tid, 0, "Lost trace data");
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err = perf_session__deliver_synth_event(bts->session, &event, NULL);
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if (err)
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pr_err("Intel BTS: failed to deliver error event, error %d\n",
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err);
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return err;
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}
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static struct intel_bts_queue *intel_bts_alloc_queue(struct intel_bts *bts,
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unsigned int queue_nr)
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{
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struct intel_bts_queue *btsq;
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btsq = zalloc(sizeof(struct intel_bts_queue));
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if (!btsq)
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return NULL;
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btsq->bts = bts;
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btsq->queue_nr = queue_nr;
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btsq->pid = -1;
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btsq->tid = -1;
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btsq->cpu = -1;
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return btsq;
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}
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static int intel_bts_setup_queue(struct intel_bts *bts,
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struct auxtrace_queue *queue,
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unsigned int queue_nr)
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{
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struct intel_bts_queue *btsq = queue->priv;
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if (list_empty(&queue->head))
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return 0;
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if (!btsq) {
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btsq = intel_bts_alloc_queue(bts, queue_nr);
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if (!btsq)
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return -ENOMEM;
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queue->priv = btsq;
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if (queue->cpu != -1)
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btsq->cpu = queue->cpu;
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btsq->tid = queue->tid;
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}
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if (bts->sampling_mode)
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return 0;
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if (!btsq->on_heap && !btsq->buffer) {
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int ret;
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btsq->buffer = auxtrace_buffer__next(queue, NULL);
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if (!btsq->buffer)
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return 0;
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ret = auxtrace_heap__add(&bts->heap, queue_nr,
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btsq->buffer->reference);
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if (ret)
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return ret;
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btsq->on_heap = true;
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}
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return 0;
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}
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static int intel_bts_setup_queues(struct intel_bts *bts)
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{
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unsigned int i;
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int ret;
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for (i = 0; i < bts->queues.nr_queues; i++) {
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ret = intel_bts_setup_queue(bts, &bts->queues.queue_array[i],
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i);
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if (ret)
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return ret;
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}
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return 0;
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}
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static inline int intel_bts_update_queues(struct intel_bts *bts)
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{
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if (bts->queues.new_data) {
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bts->queues.new_data = false;
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return intel_bts_setup_queues(bts);
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}
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return 0;
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}
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static unsigned char *intel_bts_find_overlap(unsigned char *buf_a, size_t len_a,
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unsigned char *buf_b, size_t len_b)
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{
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size_t offs, len;
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if (len_a > len_b)
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offs = len_a - len_b;
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else
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offs = 0;
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for (; offs < len_a; offs += sizeof(struct branch)) {
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len = len_a - offs;
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if (!memcmp(buf_a + offs, buf_b, len))
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return buf_b + len;
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}
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return buf_b;
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}
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static int intel_bts_do_fix_overlap(struct auxtrace_queue *queue,
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struct auxtrace_buffer *b)
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{
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struct auxtrace_buffer *a;
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void *start;
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if (b->list.prev == &queue->head)
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return 0;
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a = list_entry(b->list.prev, struct auxtrace_buffer, list);
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start = intel_bts_find_overlap(a->data, a->size, b->data, b->size);
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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 int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
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struct branch *branch)
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{
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int ret;
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struct intel_bts *bts = btsq->bts;
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union perf_event event;
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struct perf_sample sample = { .ip = 0, };
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if (bts->synth_opts.initial_skip &&
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bts->num_events++ <= bts->synth_opts.initial_skip)
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return 0;
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event.sample.header.type = PERF_RECORD_SAMPLE;
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event.sample.header.misc = PERF_RECORD_MISC_USER;
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event.sample.header.size = sizeof(struct perf_event_header);
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sample.cpumode = PERF_RECORD_MISC_USER;
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sample.ip = le64_to_cpu(branch->from);
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sample.pid = btsq->pid;
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sample.tid = btsq->tid;
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sample.addr = le64_to_cpu(branch->to);
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sample.id = btsq->bts->branches_id;
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sample.stream_id = btsq->bts->branches_id;
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sample.period = 1;
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sample.cpu = btsq->cpu;
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sample.flags = btsq->sample_flags;
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sample.insn_len = btsq->intel_pt_insn.length;
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memcpy(sample.insn, btsq->intel_pt_insn.buf, INTEL_PT_INSN_BUF_SZ);
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if (bts->synth_opts.inject) {
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event.sample.header.size = bts->branches_event_size;
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ret = perf_event__synthesize_sample(&event,
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bts->branches_sample_type,
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0, &sample);
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if (ret)
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return ret;
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}
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ret = perf_session__deliver_synth_event(bts->session, &event, &sample);
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if (ret)
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pr_err("Intel BTS: failed to deliver branch event, error %d\n",
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ret);
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return ret;
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}
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static int intel_bts_get_next_insn(struct intel_bts_queue *btsq, u64 ip)
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{
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struct machine *machine = btsq->bts->machine;
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struct thread *thread;
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struct addr_location al;
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unsigned char buf[INTEL_PT_INSN_BUF_SZ];
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ssize_t len;
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int x86_64;
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uint8_t cpumode;
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int err = -1;
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if (machine__kernel_ip(machine, ip))
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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 = machine__find_thread(machine, -1, btsq->tid);
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if (!thread)
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return -1;
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if (!thread__find_map(thread, cpumode, ip, &al) || !al.map->dso)
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goto out_put;
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len = dso__data_read_addr(al.map->dso, al.map, machine, ip, buf,
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INTEL_PT_INSN_BUF_SZ);
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if (len <= 0)
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goto out_put;
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/* Load maps to ensure dso->is_64_bit has been updated */
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map__load(al.map);
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x86_64 = al.map->dso->is_64_bit;
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if (intel_pt_get_insn(buf, len, x86_64, &btsq->intel_pt_insn))
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goto out_put;
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err = 0;
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out_put:
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thread__put(thread);
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return err;
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}
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static int intel_bts_synth_error(struct intel_bts *bts, int cpu, pid_t pid,
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pid_t tid, u64 ip)
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{
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union perf_event event;
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int err;
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auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
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INTEL_BTS_ERR_NOINSN, cpu, pid, tid, ip,
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"Failed to get instruction");
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err = perf_session__deliver_synth_event(bts->session, &event, NULL);
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if (err)
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pr_err("Intel BTS: failed to deliver error event, error %d\n",
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err);
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return err;
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}
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static int intel_bts_get_branch_type(struct intel_bts_queue *btsq,
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struct branch *branch)
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{
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int err;
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if (!branch->from) {
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if (branch->to)
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btsq->sample_flags = PERF_IP_FLAG_BRANCH |
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PERF_IP_FLAG_TRACE_BEGIN;
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else
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btsq->sample_flags = 0;
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btsq->intel_pt_insn.length = 0;
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} else if (!branch->to) {
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btsq->sample_flags = PERF_IP_FLAG_BRANCH |
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PERF_IP_FLAG_TRACE_END;
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btsq->intel_pt_insn.length = 0;
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} else {
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err = intel_bts_get_next_insn(btsq, branch->from);
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if (err) {
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btsq->sample_flags = 0;
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btsq->intel_pt_insn.length = 0;
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if (!btsq->bts->synth_opts.errors)
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return 0;
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err = intel_bts_synth_error(btsq->bts, btsq->cpu,
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btsq->pid, btsq->tid,
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branch->from);
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return err;
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}
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btsq->sample_flags = intel_pt_insn_type(btsq->intel_pt_insn.op);
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/* Check for an async branch into the kernel */
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if (!machine__kernel_ip(btsq->bts->machine, branch->from) &&
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machine__kernel_ip(btsq->bts->machine, branch->to) &&
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btsq->sample_flags != (PERF_IP_FLAG_BRANCH |
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PERF_IP_FLAG_CALL |
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PERF_IP_FLAG_SYSCALLRET))
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btsq->sample_flags = PERF_IP_FLAG_BRANCH |
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PERF_IP_FLAG_CALL |
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PERF_IP_FLAG_ASYNC |
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PERF_IP_FLAG_INTERRUPT;
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}
|
|
|
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return 0;
|
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}
|
|
|
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static int intel_bts_process_buffer(struct intel_bts_queue *btsq,
|
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struct auxtrace_buffer *buffer,
|
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struct thread *thread)
|
|
{
|
|
struct branch *branch;
|
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size_t sz, bsz = sizeof(struct branch);
|
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u32 filter = btsq->bts->branches_filter;
|
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int err = 0;
|
|
|
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if (buffer->use_data) {
|
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sz = buffer->use_size;
|
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branch = buffer->use_data;
|
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} else {
|
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sz = buffer->size;
|
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branch = buffer->data;
|
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}
|
|
|
|
if (!btsq->bts->sample_branches)
|
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return 0;
|
|
|
|
for (; sz > bsz; branch += 1, sz -= bsz) {
|
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if (!branch->from && !branch->to)
|
|
continue;
|
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intel_bts_get_branch_type(btsq, branch);
|
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if (btsq->bts->synth_opts.thread_stack)
|
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thread_stack__event(thread, btsq->sample_flags,
|
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le64_to_cpu(branch->from),
|
|
le64_to_cpu(branch->to),
|
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btsq->intel_pt_insn.length,
|
|
buffer->buffer_nr + 1);
|
|
if (filter && !(filter & btsq->sample_flags))
|
|
continue;
|
|
err = intel_bts_synth_branch_sample(btsq, branch);
|
|
if (err)
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int intel_bts_process_queue(struct intel_bts_queue *btsq, u64 *timestamp)
|
|
{
|
|
struct auxtrace_buffer *buffer = btsq->buffer, *old_buffer = buffer;
|
|
struct auxtrace_queue *queue;
|
|
struct thread *thread;
|
|
int err;
|
|
|
|
if (btsq->done)
|
|
return 1;
|
|
|
|
if (btsq->pid == -1) {
|
|
thread = machine__find_thread(btsq->bts->machine, -1,
|
|
btsq->tid);
|
|
if (thread)
|
|
btsq->pid = thread->pid_;
|
|
} else {
|
|
thread = machine__findnew_thread(btsq->bts->machine, btsq->pid,
|
|
btsq->tid);
|
|
}
|
|
|
|
queue = &btsq->bts->queues.queue_array[btsq->queue_nr];
|
|
|
|
if (!buffer)
|
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buffer = auxtrace_buffer__next(queue, NULL);
|
|
|
|
if (!buffer) {
|
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if (!btsq->bts->sampling_mode)
|
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btsq->done = 1;
|
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err = 1;
|
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goto out_put;
|
|
}
|
|
|
|
/* Currently there is no support for split buffers */
|
|
if (buffer->consecutive) {
|
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err = -EINVAL;
|
|
goto out_put;
|
|
}
|
|
|
|
if (!buffer->data) {
|
|
int fd = perf_data__fd(btsq->bts->session->data);
|
|
|
|
buffer->data = auxtrace_buffer__get_data(buffer, fd);
|
|
if (!buffer->data) {
|
|
err = -ENOMEM;
|
|
goto out_put;
|
|
}
|
|
}
|
|
|
|
if (btsq->bts->snapshot_mode && !buffer->consecutive &&
|
|
intel_bts_do_fix_overlap(queue, buffer)) {
|
|
err = -ENOMEM;
|
|
goto out_put;
|
|
}
|
|
|
|
if (!btsq->bts->synth_opts.callchain &&
|
|
!btsq->bts->synth_opts.thread_stack && thread &&
|
|
(!old_buffer || btsq->bts->sampling_mode ||
|
|
(btsq->bts->snapshot_mode && !buffer->consecutive)))
|
|
thread_stack__set_trace_nr(thread, buffer->buffer_nr + 1);
|
|
|
|
err = intel_bts_process_buffer(btsq, buffer, thread);
|
|
|
|
auxtrace_buffer__drop_data(buffer);
|
|
|
|
btsq->buffer = auxtrace_buffer__next(queue, buffer);
|
|
if (btsq->buffer) {
|
|
if (timestamp)
|
|
*timestamp = btsq->buffer->reference;
|
|
} else {
|
|
if (!btsq->bts->sampling_mode)
|
|
btsq->done = 1;
|
|
}
|
|
out_put:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static int intel_bts_flush_queue(struct intel_bts_queue *btsq)
|
|
{
|
|
u64 ts = 0;
|
|
int ret;
|
|
|
|
while (1) {
|
|
ret = intel_bts_process_queue(btsq, &ts);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int intel_bts_process_tid_exit(struct intel_bts *bts, pid_t tid)
|
|
{
|
|
struct auxtrace_queues *queues = &bts->queues;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < queues->nr_queues; i++) {
|
|
struct auxtrace_queue *queue = &bts->queues.queue_array[i];
|
|
struct intel_bts_queue *btsq = queue->priv;
|
|
|
|
if (btsq && btsq->tid == tid)
|
|
return intel_bts_flush_queue(btsq);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int intel_bts_process_queues(struct intel_bts *bts, u64 timestamp)
|
|
{
|
|
while (1) {
|
|
unsigned int queue_nr;
|
|
struct auxtrace_queue *queue;
|
|
struct intel_bts_queue *btsq;
|
|
u64 ts = 0;
|
|
int ret;
|
|
|
|
if (!bts->heap.heap_cnt)
|
|
return 0;
|
|
|
|
if (bts->heap.heap_array[0].ordinal > timestamp)
|
|
return 0;
|
|
|
|
queue_nr = bts->heap.heap_array[0].queue_nr;
|
|
queue = &bts->queues.queue_array[queue_nr];
|
|
btsq = queue->priv;
|
|
|
|
auxtrace_heap__pop(&bts->heap);
|
|
|
|
ret = intel_bts_process_queue(btsq, &ts);
|
|
if (ret < 0) {
|
|
auxtrace_heap__add(&bts->heap, queue_nr, ts);
|
|
return ret;
|
|
}
|
|
|
|
if (!ret) {
|
|
ret = auxtrace_heap__add(&bts->heap, queue_nr, ts);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
btsq->on_heap = false;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_bts_process_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_tool *tool)
|
|
{
|
|
struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
|
|
auxtrace);
|
|
u64 timestamp;
|
|
int err;
|
|
|
|
if (dump_trace)
|
|
return 0;
|
|
|
|
if (!tool->ordered_events) {
|
|
pr_err("Intel BTS requires ordered events\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (sample->time && sample->time != (u64)-1)
|
|
timestamp = perf_time_to_tsc(sample->time, &bts->tc);
|
|
else
|
|
timestamp = 0;
|
|
|
|
err = intel_bts_update_queues(bts);
|
|
if (err)
|
|
return err;
|
|
|
|
err = intel_bts_process_queues(bts, timestamp);
|
|
if (err)
|
|
return err;
|
|
if (event->header.type == PERF_RECORD_EXIT) {
|
|
err = intel_bts_process_tid_exit(bts, event->fork.tid);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (event->header.type == PERF_RECORD_AUX &&
|
|
(event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
|
|
bts->synth_opts.errors)
|
|
err = intel_bts_lost(bts, sample);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int intel_bts_process_auxtrace_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_tool *tool __maybe_unused)
|
|
{
|
|
struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
|
|
auxtrace);
|
|
|
|
if (bts->sampling_mode)
|
|
return 0;
|
|
|
|
if (!bts->data_queued) {
|
|
struct auxtrace_buffer *buffer;
|
|
off_t data_offset;
|
|
int fd = perf_data__fd(session->data);
|
|
int err;
|
|
|
|
if (perf_data__is_pipe(session->data)) {
|
|
data_offset = 0;
|
|
} else {
|
|
data_offset = lseek(fd, 0, SEEK_CUR);
|
|
if (data_offset == -1)
|
|
return -errno;
|
|
}
|
|
|
|
err = auxtrace_queues__add_event(&bts->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_bts_dump_event(bts, buffer->data,
|
|
buffer->size);
|
|
auxtrace_buffer__put_data(buffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_bts_flush(struct perf_session *session,
|
|
struct perf_tool *tool __maybe_unused)
|
|
{
|
|
struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
|
|
auxtrace);
|
|
int ret;
|
|
|
|
if (dump_trace || bts->sampling_mode)
|
|
return 0;
|
|
|
|
if (!tool->ordered_events)
|
|
return -EINVAL;
|
|
|
|
ret = intel_bts_update_queues(bts);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return intel_bts_process_queues(bts, MAX_TIMESTAMP);
|
|
}
|
|
|
|
static void intel_bts_free_queue(void *priv)
|
|
{
|
|
struct intel_bts_queue *btsq = priv;
|
|
|
|
if (!btsq)
|
|
return;
|
|
free(btsq);
|
|
}
|
|
|
|
static void intel_bts_free_events(struct perf_session *session)
|
|
{
|
|
struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
|
|
auxtrace);
|
|
struct auxtrace_queues *queues = &bts->queues;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < queues->nr_queues; i++) {
|
|
intel_bts_free_queue(queues->queue_array[i].priv);
|
|
queues->queue_array[i].priv = NULL;
|
|
}
|
|
auxtrace_queues__free(queues);
|
|
}
|
|
|
|
static void intel_bts_free(struct perf_session *session)
|
|
{
|
|
struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
|
|
auxtrace);
|
|
|
|
auxtrace_heap__free(&bts->heap);
|
|
intel_bts_free_events(session);
|
|
session->auxtrace = NULL;
|
|
free(bts);
|
|
}
|
|
|
|
struct intel_bts_synth {
|
|
struct perf_tool dummy_tool;
|
|
struct perf_session *session;
|
|
};
|
|
|
|
static int intel_bts_event_synth(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample __maybe_unused,
|
|
struct machine *machine __maybe_unused)
|
|
{
|
|
struct intel_bts_synth *intel_bts_synth =
|
|
container_of(tool, struct intel_bts_synth, dummy_tool);
|
|
|
|
return perf_session__deliver_synth_event(intel_bts_synth->session,
|
|
event, NULL);
|
|
}
|
|
|
|
static int intel_bts_synth_event(struct perf_session *session,
|
|
struct perf_event_attr *attr, u64 id)
|
|
{
|
|
struct intel_bts_synth intel_bts_synth;
|
|
|
|
memset(&intel_bts_synth, 0, sizeof(struct intel_bts_synth));
|
|
intel_bts_synth.session = session;
|
|
|
|
return perf_event__synthesize_attr(&intel_bts_synth.dummy_tool, attr, 1,
|
|
&id, intel_bts_event_synth);
|
|
}
|
|
|
|
static int intel_bts_synth_events(struct intel_bts *bts,
|
|
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_entry(evlist, evsel) {
|
|
if (evsel->attr.type == bts->pmu_type && evsel->ids) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
pr_debug("There are no selected events with Intel BTS 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;
|
|
attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
|
|
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 (bts->synth_opts.branches) {
|
|
attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
|
|
attr.sample_period = 1;
|
|
attr.sample_type |= PERF_SAMPLE_ADDR;
|
|
pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
|
|
id, (u64)attr.sample_type);
|
|
err = intel_bts_synth_event(session, &attr, id);
|
|
if (err) {
|
|
pr_err("%s: failed to synthesize 'branches' event type\n",
|
|
__func__);
|
|
return err;
|
|
}
|
|
bts->sample_branches = true;
|
|
bts->branches_sample_type = attr.sample_type;
|
|
bts->branches_id = id;
|
|
/*
|
|
* We only use sample types from PERF_SAMPLE_MASK so we can use
|
|
* __perf_evsel__sample_size() here.
|
|
*/
|
|
bts->branches_event_size = sizeof(struct sample_event) +
|
|
__perf_evsel__sample_size(attr.sample_type);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const intel_bts_info_fmts[] = {
|
|
[INTEL_BTS_PMU_TYPE] = " PMU Type %"PRId64"\n",
|
|
[INTEL_BTS_TIME_SHIFT] = " Time Shift %"PRIu64"\n",
|
|
[INTEL_BTS_TIME_MULT] = " Time Muliplier %"PRIu64"\n",
|
|
[INTEL_BTS_TIME_ZERO] = " Time Zero %"PRIu64"\n",
|
|
[INTEL_BTS_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n",
|
|
[INTEL_BTS_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n",
|
|
};
|
|
|
|
static void intel_bts_print_info(u64 *arr, int start, int finish)
|
|
{
|
|
int i;
|
|
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
for (i = start; i <= finish; i++)
|
|
fprintf(stdout, intel_bts_info_fmts[i], arr[i]);
|
|
}
|
|
|
|
int intel_bts_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_BTS_SNAPSHOT_MODE;
|
|
struct intel_bts *bts;
|
|
int err;
|
|
|
|
if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
|
|
min_sz)
|
|
return -EINVAL;
|
|
|
|
bts = zalloc(sizeof(struct intel_bts));
|
|
if (!bts)
|
|
return -ENOMEM;
|
|
|
|
err = auxtrace_queues__init(&bts->queues);
|
|
if (err)
|
|
goto err_free;
|
|
|
|
bts->session = session;
|
|
bts->machine = &session->machines.host; /* No kvm support */
|
|
bts->auxtrace_type = auxtrace_info->type;
|
|
bts->pmu_type = auxtrace_info->priv[INTEL_BTS_PMU_TYPE];
|
|
bts->tc.time_shift = auxtrace_info->priv[INTEL_BTS_TIME_SHIFT];
|
|
bts->tc.time_mult = auxtrace_info->priv[INTEL_BTS_TIME_MULT];
|
|
bts->tc.time_zero = auxtrace_info->priv[INTEL_BTS_TIME_ZERO];
|
|
bts->cap_user_time_zero =
|
|
auxtrace_info->priv[INTEL_BTS_CAP_USER_TIME_ZERO];
|
|
bts->snapshot_mode = auxtrace_info->priv[INTEL_BTS_SNAPSHOT_MODE];
|
|
|
|
bts->sampling_mode = false;
|
|
|
|
bts->auxtrace.process_event = intel_bts_process_event;
|
|
bts->auxtrace.process_auxtrace_event = intel_bts_process_auxtrace_event;
|
|
bts->auxtrace.flush_events = intel_bts_flush;
|
|
bts->auxtrace.free_events = intel_bts_free_events;
|
|
bts->auxtrace.free = intel_bts_free;
|
|
session->auxtrace = &bts->auxtrace;
|
|
|
|
intel_bts_print_info(&auxtrace_info->priv[0], INTEL_BTS_PMU_TYPE,
|
|
INTEL_BTS_SNAPSHOT_MODE);
|
|
|
|
if (dump_trace)
|
|
return 0;
|
|
|
|
if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
|
|
bts->synth_opts = *session->itrace_synth_opts;
|
|
} else {
|
|
itrace_synth_opts__set_default(&bts->synth_opts);
|
|
if (session->itrace_synth_opts)
|
|
bts->synth_opts.thread_stack =
|
|
session->itrace_synth_opts->thread_stack;
|
|
}
|
|
|
|
if (bts->synth_opts.calls)
|
|
bts->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
|
|
PERF_IP_FLAG_TRACE_END;
|
|
if (bts->synth_opts.returns)
|
|
bts->branches_filter |= PERF_IP_FLAG_RETURN |
|
|
PERF_IP_FLAG_TRACE_BEGIN;
|
|
|
|
err = intel_bts_synth_events(bts, session);
|
|
if (err)
|
|
goto err_free_queues;
|
|
|
|
err = auxtrace_queues__process_index(&bts->queues, session);
|
|
if (err)
|
|
goto err_free_queues;
|
|
|
|
if (bts->queues.populated)
|
|
bts->data_queued = true;
|
|
|
|
return 0;
|
|
|
|
err_free_queues:
|
|
auxtrace_queues__free(&bts->queues);
|
|
session->auxtrace = NULL;
|
|
err_free:
|
|
free(bts);
|
|
return err;
|
|
}
|