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![Stephane Eranian](/assets/img/avatar_default.png)
No need to set evsel->fd to NULL after calling perf_evsel__free_fd(), as this method already does that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-wu6kul8fpapr8iyqm685ewtf@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015 lines
47 KiB
C
2015 lines
47 KiB
C
/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Parts came from builtin-{top,stat,record}.c, see those files for further
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* copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include <byteswap.h>
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#include <linux/bitops.h>
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#include <api/fs/debugfs.h>
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#include <traceevent/event-parse.h>
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#include <linux/hw_breakpoint.h>
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#include <linux/perf_event.h>
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#include <sys/resource.h>
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#include "asm/bug.h"
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#include "evsel.h"
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#include "evlist.h"
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#include "util.h"
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#include "cpumap.h"
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#include "thread_map.h"
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#include "target.h"
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#include "perf_regs.h"
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#include "debug.h"
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#include "trace-event.h"
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static struct {
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bool sample_id_all;
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bool exclude_guest;
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bool mmap2;
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} perf_missing_features;
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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int __perf_evsel__sample_size(u64 sample_type)
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{
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u64 mask = sample_type & PERF_SAMPLE_MASK;
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int size = 0;
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int i;
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for (i = 0; i < 64; i++) {
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if (mask & (1ULL << i))
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size++;
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}
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size *= sizeof(u64);
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return size;
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}
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/**
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* __perf_evsel__calc_id_pos - calculate id_pos.
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* @sample_type: sample type
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*
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* This function returns the position of the event id (PERF_SAMPLE_ID or
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* PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
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* sample_event.
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*/
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static int __perf_evsel__calc_id_pos(u64 sample_type)
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{
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int idx = 0;
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if (sample_type & PERF_SAMPLE_IDENTIFIER)
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return 0;
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if (!(sample_type & PERF_SAMPLE_ID))
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return -1;
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if (sample_type & PERF_SAMPLE_IP)
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idx += 1;
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if (sample_type & PERF_SAMPLE_TID)
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idx += 1;
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if (sample_type & PERF_SAMPLE_TIME)
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idx += 1;
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if (sample_type & PERF_SAMPLE_ADDR)
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idx += 1;
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return idx;
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}
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/**
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* __perf_evsel__calc_is_pos - calculate is_pos.
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* @sample_type: sample type
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*
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* This function returns the position (counting backwards) of the event id
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* (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
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* sample_id_all is used there is an id sample appended to non-sample events.
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*/
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static int __perf_evsel__calc_is_pos(u64 sample_type)
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{
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int idx = 1;
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if (sample_type & PERF_SAMPLE_IDENTIFIER)
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return 1;
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if (!(sample_type & PERF_SAMPLE_ID))
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return -1;
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if (sample_type & PERF_SAMPLE_CPU)
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idx += 1;
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if (sample_type & PERF_SAMPLE_STREAM_ID)
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idx += 1;
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return idx;
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}
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void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
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{
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evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
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evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
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}
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void hists__init(struct hists *hists)
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{
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memset(hists, 0, sizeof(*hists));
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hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
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hists->entries_in = &hists->entries_in_array[0];
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hists->entries_collapsed = RB_ROOT;
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hists->entries = RB_ROOT;
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pthread_mutex_init(&hists->lock, NULL);
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}
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void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
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enum perf_event_sample_format bit)
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{
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if (!(evsel->attr.sample_type & bit)) {
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evsel->attr.sample_type |= bit;
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evsel->sample_size += sizeof(u64);
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perf_evsel__calc_id_pos(evsel);
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}
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}
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void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
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enum perf_event_sample_format bit)
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{
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if (evsel->attr.sample_type & bit) {
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evsel->attr.sample_type &= ~bit;
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evsel->sample_size -= sizeof(u64);
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perf_evsel__calc_id_pos(evsel);
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}
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}
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void perf_evsel__set_sample_id(struct perf_evsel *evsel,
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bool can_sample_identifier)
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{
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if (can_sample_identifier) {
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perf_evsel__reset_sample_bit(evsel, ID);
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perf_evsel__set_sample_bit(evsel, IDENTIFIER);
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} else {
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perf_evsel__set_sample_bit(evsel, ID);
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}
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evsel->attr.read_format |= PERF_FORMAT_ID;
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}
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void perf_evsel__init(struct perf_evsel *evsel,
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struct perf_event_attr *attr, int idx)
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{
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evsel->idx = idx;
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evsel->attr = *attr;
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evsel->leader = evsel;
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evsel->unit = "";
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evsel->scale = 1.0;
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INIT_LIST_HEAD(&evsel->node);
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hists__init(&evsel->hists);
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evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
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perf_evsel__calc_id_pos(evsel);
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}
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struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
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{
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struct perf_evsel *evsel = zalloc(sizeof(*evsel));
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if (evsel != NULL)
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perf_evsel__init(evsel, attr, idx);
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return evsel;
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}
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struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
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{
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struct perf_evsel *evsel = zalloc(sizeof(*evsel));
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if (evsel != NULL) {
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struct perf_event_attr attr = {
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.type = PERF_TYPE_TRACEPOINT,
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.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
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PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
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};
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if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
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goto out_free;
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evsel->tp_format = trace_event__tp_format(sys, name);
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if (evsel->tp_format == NULL)
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goto out_free;
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event_attr_init(&attr);
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attr.config = evsel->tp_format->id;
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attr.sample_period = 1;
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perf_evsel__init(evsel, &attr, idx);
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}
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return evsel;
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out_free:
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zfree(&evsel->name);
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free(evsel);
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return NULL;
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}
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const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
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"cycles",
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"instructions",
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"cache-references",
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"cache-misses",
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"branches",
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"branch-misses",
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"bus-cycles",
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"stalled-cycles-frontend",
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"stalled-cycles-backend",
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"ref-cycles",
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};
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static const char *__perf_evsel__hw_name(u64 config)
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{
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if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
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return perf_evsel__hw_names[config];
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return "unknown-hardware";
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}
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static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int colon = 0, r = 0;
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struct perf_event_attr *attr = &evsel->attr;
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bool exclude_guest_default = false;
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#define MOD_PRINT(context, mod) do { \
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if (!attr->exclude_##context) { \
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if (!colon) colon = ++r; \
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r += scnprintf(bf + r, size - r, "%c", mod); \
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} } while(0)
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if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
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MOD_PRINT(kernel, 'k');
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MOD_PRINT(user, 'u');
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MOD_PRINT(hv, 'h');
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exclude_guest_default = true;
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}
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if (attr->precise_ip) {
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if (!colon)
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colon = ++r;
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r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
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exclude_guest_default = true;
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}
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if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
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MOD_PRINT(host, 'H');
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MOD_PRINT(guest, 'G');
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}
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#undef MOD_PRINT
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if (colon)
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bf[colon - 1] = ':';
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return r;
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}
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static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
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return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
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}
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const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
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"cpu-clock",
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"task-clock",
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"page-faults",
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"context-switches",
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"cpu-migrations",
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"minor-faults",
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"major-faults",
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"alignment-faults",
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"emulation-faults",
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"dummy",
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};
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static const char *__perf_evsel__sw_name(u64 config)
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{
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if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
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return perf_evsel__sw_names[config];
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return "unknown-software";
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}
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static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
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return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
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}
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static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
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{
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int r;
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r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
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if (type & HW_BREAKPOINT_R)
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r += scnprintf(bf + r, size - r, "r");
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if (type & HW_BREAKPOINT_W)
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r += scnprintf(bf + r, size - r, "w");
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if (type & HW_BREAKPOINT_X)
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r += scnprintf(bf + r, size - r, "x");
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return r;
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}
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static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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struct perf_event_attr *attr = &evsel->attr;
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int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
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return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
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}
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const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
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[PERF_EVSEL__MAX_ALIASES] = {
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{ "L1-dcache", "l1-d", "l1d", "L1-data", },
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{ "L1-icache", "l1-i", "l1i", "L1-instruction", },
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{ "LLC", "L2", },
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{ "dTLB", "d-tlb", "Data-TLB", },
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{ "iTLB", "i-tlb", "Instruction-TLB", },
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{ "branch", "branches", "bpu", "btb", "bpc", },
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{ "node", },
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};
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const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_EVSEL__MAX_ALIASES] = {
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{ "load", "loads", "read", },
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{ "store", "stores", "write", },
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{ "prefetch", "prefetches", "speculative-read", "speculative-load", },
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};
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const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
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[PERF_EVSEL__MAX_ALIASES] = {
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{ "refs", "Reference", "ops", "access", },
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{ "misses", "miss", },
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};
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#define C(x) PERF_COUNT_HW_CACHE_##x
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#define CACHE_READ (1 << C(OP_READ))
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#define CACHE_WRITE (1 << C(OP_WRITE))
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#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
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#define COP(x) (1 << x)
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/*
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* cache operartion stat
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* L1I : Read and prefetch only
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* ITLB and BPU : Read-only
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*/
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static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
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[C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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[C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
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[C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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[C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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[C(ITLB)] = (CACHE_READ),
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[C(BPU)] = (CACHE_READ),
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[C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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};
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bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
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{
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if (perf_evsel__hw_cache_stat[type] & COP(op))
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return true; /* valid */
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else
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return false; /* invalid */
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}
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int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
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char *bf, size_t size)
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{
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if (result) {
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return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
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perf_evsel__hw_cache_op[op][0],
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perf_evsel__hw_cache_result[result][0]);
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}
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return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
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perf_evsel__hw_cache_op[op][1]);
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}
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static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
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{
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u8 op, result, type = (config >> 0) & 0xff;
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const char *err = "unknown-ext-hardware-cache-type";
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if (type > PERF_COUNT_HW_CACHE_MAX)
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goto out_err;
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op = (config >> 8) & 0xff;
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err = "unknown-ext-hardware-cache-op";
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if (op > PERF_COUNT_HW_CACHE_OP_MAX)
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goto out_err;
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result = (config >> 16) & 0xff;
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err = "unknown-ext-hardware-cache-result";
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if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
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goto out_err;
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err = "invalid-cache";
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if (!perf_evsel__is_cache_op_valid(type, op))
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goto out_err;
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return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
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out_err:
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return scnprintf(bf, size, "%s", err);
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}
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static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
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return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
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}
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static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
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return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
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}
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const char *perf_evsel__name(struct perf_evsel *evsel)
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{
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char bf[128];
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if (evsel->name)
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return evsel->name;
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switch (evsel->attr.type) {
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case PERF_TYPE_RAW:
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perf_evsel__raw_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_HARDWARE:
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perf_evsel__hw_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_HW_CACHE:
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perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_SOFTWARE:
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perf_evsel__sw_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_TRACEPOINT:
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scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
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break;
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case PERF_TYPE_BREAKPOINT:
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perf_evsel__bp_name(evsel, bf, sizeof(bf));
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break;
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default:
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scnprintf(bf, sizeof(bf), "unknown attr type: %d",
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evsel->attr.type);
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break;
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}
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evsel->name = strdup(bf);
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return evsel->name ?: "unknown";
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}
|
|
|
|
const char *perf_evsel__group_name(struct perf_evsel *evsel)
|
|
{
|
|
return evsel->group_name ?: "anon group";
|
|
}
|
|
|
|
int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
|
|
{
|
|
int ret;
|
|
struct perf_evsel *pos;
|
|
const char *group_name = perf_evsel__group_name(evsel);
|
|
|
|
ret = scnprintf(buf, size, "%s", group_name);
|
|
|
|
ret += scnprintf(buf + ret, size - ret, " { %s",
|
|
perf_evsel__name(evsel));
|
|
|
|
for_each_group_member(pos, evsel)
|
|
ret += scnprintf(buf + ret, size - ret, ", %s",
|
|
perf_evsel__name(pos));
|
|
|
|
ret += scnprintf(buf + ret, size - ret, " }");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* The enable_on_exec/disabled value strategy:
|
|
*
|
|
* 1) For any type of traced program:
|
|
* - all independent events and group leaders are disabled
|
|
* - all group members are enabled
|
|
*
|
|
* Group members are ruled by group leaders. They need to
|
|
* be enabled, because the group scheduling relies on that.
|
|
*
|
|
* 2) For traced programs executed by perf:
|
|
* - all independent events and group leaders have
|
|
* enable_on_exec set
|
|
* - we don't specifically enable or disable any event during
|
|
* the record command
|
|
*
|
|
* Independent events and group leaders are initially disabled
|
|
* and get enabled by exec. Group members are ruled by group
|
|
* leaders as stated in 1).
|
|
*
|
|
* 3) For traced programs attached by perf (pid/tid):
|
|
* - we specifically enable or disable all events during
|
|
* the record command
|
|
*
|
|
* When attaching events to already running traced we
|
|
* enable/disable events specifically, as there's no
|
|
* initial traced exec call.
|
|
*/
|
|
void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
|
|
{
|
|
struct perf_evsel *leader = evsel->leader;
|
|
struct perf_event_attr *attr = &evsel->attr;
|
|
int track = !evsel->idx; /* only the first counter needs these */
|
|
bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
|
|
|
|
attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
|
|
attr->inherit = !opts->no_inherit;
|
|
|
|
perf_evsel__set_sample_bit(evsel, IP);
|
|
perf_evsel__set_sample_bit(evsel, TID);
|
|
|
|
if (evsel->sample_read) {
|
|
perf_evsel__set_sample_bit(evsel, READ);
|
|
|
|
/*
|
|
* We need ID even in case of single event, because
|
|
* PERF_SAMPLE_READ process ID specific data.
|
|
*/
|
|
perf_evsel__set_sample_id(evsel, false);
|
|
|
|
/*
|
|
* Apply group format only if we belong to group
|
|
* with more than one members.
|
|
*/
|
|
if (leader->nr_members > 1) {
|
|
attr->read_format |= PERF_FORMAT_GROUP;
|
|
attr->inherit = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We default some events to a 1 default interval. But keep
|
|
* it a weak assumption overridable by the user.
|
|
*/
|
|
if (!attr->sample_period || (opts->user_freq != UINT_MAX &&
|
|
opts->user_interval != ULLONG_MAX)) {
|
|
if (opts->freq) {
|
|
perf_evsel__set_sample_bit(evsel, PERIOD);
|
|
attr->freq = 1;
|
|
attr->sample_freq = opts->freq;
|
|
} else {
|
|
attr->sample_period = opts->default_interval;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Disable sampling for all group members other
|
|
* than leader in case leader 'leads' the sampling.
|
|
*/
|
|
if ((leader != evsel) && leader->sample_read) {
|
|
attr->sample_freq = 0;
|
|
attr->sample_period = 0;
|
|
}
|
|
|
|
if (opts->no_samples)
|
|
attr->sample_freq = 0;
|
|
|
|
if (opts->inherit_stat)
|
|
attr->inherit_stat = 1;
|
|
|
|
if (opts->sample_address) {
|
|
perf_evsel__set_sample_bit(evsel, ADDR);
|
|
attr->mmap_data = track;
|
|
}
|
|
|
|
if (opts->call_graph) {
|
|
perf_evsel__set_sample_bit(evsel, CALLCHAIN);
|
|
|
|
if (opts->call_graph == CALLCHAIN_DWARF) {
|
|
perf_evsel__set_sample_bit(evsel, REGS_USER);
|
|
perf_evsel__set_sample_bit(evsel, STACK_USER);
|
|
attr->sample_regs_user = PERF_REGS_MASK;
|
|
attr->sample_stack_user = opts->stack_dump_size;
|
|
attr->exclude_callchain_user = 1;
|
|
}
|
|
}
|
|
|
|
if (target__has_cpu(&opts->target))
|
|
perf_evsel__set_sample_bit(evsel, CPU);
|
|
|
|
if (opts->period)
|
|
perf_evsel__set_sample_bit(evsel, PERIOD);
|
|
|
|
if (!perf_missing_features.sample_id_all &&
|
|
(opts->sample_time || !opts->no_inherit ||
|
|
target__has_cpu(&opts->target) || per_cpu))
|
|
perf_evsel__set_sample_bit(evsel, TIME);
|
|
|
|
if (opts->raw_samples) {
|
|
perf_evsel__set_sample_bit(evsel, TIME);
|
|
perf_evsel__set_sample_bit(evsel, RAW);
|
|
perf_evsel__set_sample_bit(evsel, CPU);
|
|
}
|
|
|
|
if (opts->sample_address)
|
|
perf_evsel__set_sample_bit(evsel, DATA_SRC);
|
|
|
|
if (opts->no_buffering) {
|
|
attr->watermark = 0;
|
|
attr->wakeup_events = 1;
|
|
}
|
|
if (opts->branch_stack) {
|
|
perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
|
|
attr->branch_sample_type = opts->branch_stack;
|
|
}
|
|
|
|
if (opts->sample_weight)
|
|
perf_evsel__set_sample_bit(evsel, WEIGHT);
|
|
|
|
attr->mmap = track;
|
|
attr->comm = track;
|
|
|
|
if (opts->sample_transaction)
|
|
perf_evsel__set_sample_bit(evsel, TRANSACTION);
|
|
|
|
/*
|
|
* XXX see the function comment above
|
|
*
|
|
* Disabling only independent events or group leaders,
|
|
* keeping group members enabled.
|
|
*/
|
|
if (perf_evsel__is_group_leader(evsel))
|
|
attr->disabled = 1;
|
|
|
|
/*
|
|
* Setting enable_on_exec for independent events and
|
|
* group leaders for traced executed by perf.
|
|
*/
|
|
if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
|
|
!opts->initial_delay)
|
|
attr->enable_on_exec = 1;
|
|
}
|
|
|
|
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
|
|
{
|
|
int cpu, thread;
|
|
evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
|
|
|
|
if (evsel->fd) {
|
|
for (cpu = 0; cpu < ncpus; cpu++) {
|
|
for (thread = 0; thread < nthreads; thread++) {
|
|
FD(evsel, cpu, thread) = -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return evsel->fd != NULL ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
|
|
int ioc, void *arg)
|
|
{
|
|
int cpu, thread;
|
|
|
|
for (cpu = 0; cpu < ncpus; cpu++) {
|
|
for (thread = 0; thread < nthreads; thread++) {
|
|
int fd = FD(evsel, cpu, thread),
|
|
err = ioctl(fd, ioc, arg);
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
|
|
const char *filter)
|
|
{
|
|
return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
|
|
PERF_EVENT_IOC_SET_FILTER,
|
|
(void *)filter);
|
|
}
|
|
|
|
int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
|
|
{
|
|
return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
|
|
PERF_EVENT_IOC_ENABLE,
|
|
0);
|
|
}
|
|
|
|
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
|
|
{
|
|
evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
|
|
if (evsel->sample_id == NULL)
|
|
return -ENOMEM;
|
|
|
|
evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
|
|
if (evsel->id == NULL) {
|
|
xyarray__delete(evsel->sample_id);
|
|
evsel->sample_id = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
|
|
{
|
|
memset(evsel->counts, 0, (sizeof(*evsel->counts) +
|
|
(ncpus * sizeof(struct perf_counts_values))));
|
|
}
|
|
|
|
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
|
|
{
|
|
evsel->counts = zalloc((sizeof(*evsel->counts) +
|
|
(ncpus * sizeof(struct perf_counts_values))));
|
|
return evsel->counts != NULL ? 0 : -ENOMEM;
|
|
}
|
|
|
|
void perf_evsel__free_fd(struct perf_evsel *evsel)
|
|
{
|
|
xyarray__delete(evsel->fd);
|
|
evsel->fd = NULL;
|
|
}
|
|
|
|
void perf_evsel__free_id(struct perf_evsel *evsel)
|
|
{
|
|
xyarray__delete(evsel->sample_id);
|
|
evsel->sample_id = NULL;
|
|
zfree(&evsel->id);
|
|
}
|
|
|
|
void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
|
|
{
|
|
int cpu, thread;
|
|
|
|
for (cpu = 0; cpu < ncpus; cpu++)
|
|
for (thread = 0; thread < nthreads; ++thread) {
|
|
close(FD(evsel, cpu, thread));
|
|
FD(evsel, cpu, thread) = -1;
|
|
}
|
|
}
|
|
|
|
void perf_evsel__free_counts(struct perf_evsel *evsel)
|
|
{
|
|
zfree(&evsel->counts);
|
|
}
|
|
|
|
void perf_evsel__exit(struct perf_evsel *evsel)
|
|
{
|
|
assert(list_empty(&evsel->node));
|
|
perf_evsel__free_fd(evsel);
|
|
perf_evsel__free_id(evsel);
|
|
}
|
|
|
|
void perf_evsel__delete(struct perf_evsel *evsel)
|
|
{
|
|
perf_evsel__exit(evsel);
|
|
close_cgroup(evsel->cgrp);
|
|
zfree(&evsel->group_name);
|
|
if (evsel->tp_format)
|
|
pevent_free_format(evsel->tp_format);
|
|
zfree(&evsel->name);
|
|
free(evsel);
|
|
}
|
|
|
|
static inline void compute_deltas(struct perf_evsel *evsel,
|
|
int cpu,
|
|
struct perf_counts_values *count)
|
|
{
|
|
struct perf_counts_values tmp;
|
|
|
|
if (!evsel->prev_raw_counts)
|
|
return;
|
|
|
|
if (cpu == -1) {
|
|
tmp = evsel->prev_raw_counts->aggr;
|
|
evsel->prev_raw_counts->aggr = *count;
|
|
} else {
|
|
tmp = evsel->prev_raw_counts->cpu[cpu];
|
|
evsel->prev_raw_counts->cpu[cpu] = *count;
|
|
}
|
|
|
|
count->val = count->val - tmp.val;
|
|
count->ena = count->ena - tmp.ena;
|
|
count->run = count->run - tmp.run;
|
|
}
|
|
|
|
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
|
|
int cpu, int thread, bool scale)
|
|
{
|
|
struct perf_counts_values count;
|
|
size_t nv = scale ? 3 : 1;
|
|
|
|
if (FD(evsel, cpu, thread) < 0)
|
|
return -EINVAL;
|
|
|
|
if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
|
|
return -ENOMEM;
|
|
|
|
if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
|
|
return -errno;
|
|
|
|
compute_deltas(evsel, cpu, &count);
|
|
|
|
if (scale) {
|
|
if (count.run == 0)
|
|
count.val = 0;
|
|
else if (count.run < count.ena)
|
|
count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
|
|
} else
|
|
count.ena = count.run = 0;
|
|
|
|
evsel->counts->cpu[cpu] = count;
|
|
return 0;
|
|
}
|
|
|
|
int __perf_evsel__read(struct perf_evsel *evsel,
|
|
int ncpus, int nthreads, bool scale)
|
|
{
|
|
size_t nv = scale ? 3 : 1;
|
|
int cpu, thread;
|
|
struct perf_counts_values *aggr = &evsel->counts->aggr, count;
|
|
|
|
aggr->val = aggr->ena = aggr->run = 0;
|
|
|
|
for (cpu = 0; cpu < ncpus; cpu++) {
|
|
for (thread = 0; thread < nthreads; thread++) {
|
|
if (FD(evsel, cpu, thread) < 0)
|
|
continue;
|
|
|
|
if (readn(FD(evsel, cpu, thread),
|
|
&count, nv * sizeof(u64)) < 0)
|
|
return -errno;
|
|
|
|
aggr->val += count.val;
|
|
if (scale) {
|
|
aggr->ena += count.ena;
|
|
aggr->run += count.run;
|
|
}
|
|
}
|
|
}
|
|
|
|
compute_deltas(evsel, -1, aggr);
|
|
|
|
evsel->counts->scaled = 0;
|
|
if (scale) {
|
|
if (aggr->run == 0) {
|
|
evsel->counts->scaled = -1;
|
|
aggr->val = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (aggr->run < aggr->ena) {
|
|
evsel->counts->scaled = 1;
|
|
aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
|
|
}
|
|
} else
|
|
aggr->ena = aggr->run = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
|
|
{
|
|
struct perf_evsel *leader = evsel->leader;
|
|
int fd;
|
|
|
|
if (perf_evsel__is_group_leader(evsel))
|
|
return -1;
|
|
|
|
/*
|
|
* Leader must be already processed/open,
|
|
* if not it's a bug.
|
|
*/
|
|
BUG_ON(!leader->fd);
|
|
|
|
fd = FD(leader, cpu, thread);
|
|
BUG_ON(fd == -1);
|
|
|
|
return fd;
|
|
}
|
|
|
|
#define __PRINT_ATTR(fmt, cast, field) \
|
|
fprintf(fp, " %-19s "fmt"\n", #field, cast attr->field)
|
|
|
|
#define PRINT_ATTR_U32(field) __PRINT_ATTR("%u" , , field)
|
|
#define PRINT_ATTR_X32(field) __PRINT_ATTR("%#x", , field)
|
|
#define PRINT_ATTR_U64(field) __PRINT_ATTR("%" PRIu64, (uint64_t), field)
|
|
#define PRINT_ATTR_X64(field) __PRINT_ATTR("%#"PRIx64, (uint64_t), field)
|
|
|
|
#define PRINT_ATTR2N(name1, field1, name2, field2) \
|
|
fprintf(fp, " %-19s %u %-19s %u\n", \
|
|
name1, attr->field1, name2, attr->field2)
|
|
|
|
#define PRINT_ATTR2(field1, field2) \
|
|
PRINT_ATTR2N(#field1, field1, #field2, field2)
|
|
|
|
static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp)
|
|
{
|
|
size_t ret = 0;
|
|
|
|
ret += fprintf(fp, "%.60s\n", graph_dotted_line);
|
|
ret += fprintf(fp, "perf_event_attr:\n");
|
|
|
|
ret += PRINT_ATTR_U32(type);
|
|
ret += PRINT_ATTR_U32(size);
|
|
ret += PRINT_ATTR_X64(config);
|
|
ret += PRINT_ATTR_U64(sample_period);
|
|
ret += PRINT_ATTR_U64(sample_freq);
|
|
ret += PRINT_ATTR_X64(sample_type);
|
|
ret += PRINT_ATTR_X64(read_format);
|
|
|
|
ret += PRINT_ATTR2(disabled, inherit);
|
|
ret += PRINT_ATTR2(pinned, exclusive);
|
|
ret += PRINT_ATTR2(exclude_user, exclude_kernel);
|
|
ret += PRINT_ATTR2(exclude_hv, exclude_idle);
|
|
ret += PRINT_ATTR2(mmap, comm);
|
|
ret += PRINT_ATTR2(freq, inherit_stat);
|
|
ret += PRINT_ATTR2(enable_on_exec, task);
|
|
ret += PRINT_ATTR2(watermark, precise_ip);
|
|
ret += PRINT_ATTR2(mmap_data, sample_id_all);
|
|
ret += PRINT_ATTR2(exclude_host, exclude_guest);
|
|
ret += PRINT_ATTR2N("excl.callchain_kern", exclude_callchain_kernel,
|
|
"excl.callchain_user", exclude_callchain_user);
|
|
ret += PRINT_ATTR_U32(mmap2);
|
|
|
|
ret += PRINT_ATTR_U32(wakeup_events);
|
|
ret += PRINT_ATTR_U32(wakeup_watermark);
|
|
ret += PRINT_ATTR_X32(bp_type);
|
|
ret += PRINT_ATTR_X64(bp_addr);
|
|
ret += PRINT_ATTR_X64(config1);
|
|
ret += PRINT_ATTR_U64(bp_len);
|
|
ret += PRINT_ATTR_X64(config2);
|
|
ret += PRINT_ATTR_X64(branch_sample_type);
|
|
ret += PRINT_ATTR_X64(sample_regs_user);
|
|
ret += PRINT_ATTR_U32(sample_stack_user);
|
|
|
|
ret += fprintf(fp, "%.60s\n", graph_dotted_line);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
|
|
struct thread_map *threads)
|
|
{
|
|
int cpu, thread;
|
|
unsigned long flags = 0;
|
|
int pid = -1, err;
|
|
enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
|
|
|
|
if (evsel->fd == NULL &&
|
|
perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
|
|
return -ENOMEM;
|
|
|
|
if (evsel->cgrp) {
|
|
flags = PERF_FLAG_PID_CGROUP;
|
|
pid = evsel->cgrp->fd;
|
|
}
|
|
|
|
fallback_missing_features:
|
|
if (perf_missing_features.mmap2)
|
|
evsel->attr.mmap2 = 0;
|
|
if (perf_missing_features.exclude_guest)
|
|
evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
|
|
retry_sample_id:
|
|
if (perf_missing_features.sample_id_all)
|
|
evsel->attr.sample_id_all = 0;
|
|
|
|
if (verbose >= 2)
|
|
perf_event_attr__fprintf(&evsel->attr, stderr);
|
|
|
|
for (cpu = 0; cpu < cpus->nr; cpu++) {
|
|
|
|
for (thread = 0; thread < threads->nr; thread++) {
|
|
int group_fd;
|
|
|
|
if (!evsel->cgrp)
|
|
pid = threads->map[thread];
|
|
|
|
group_fd = get_group_fd(evsel, cpu, thread);
|
|
retry_open:
|
|
pr_debug2("perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
|
|
pid, cpus->map[cpu], group_fd, flags);
|
|
|
|
FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
|
|
pid,
|
|
cpus->map[cpu],
|
|
group_fd, flags);
|
|
if (FD(evsel, cpu, thread) < 0) {
|
|
err = -errno;
|
|
pr_debug2("perf_event_open failed, error %d\n",
|
|
err);
|
|
goto try_fallback;
|
|
}
|
|
set_rlimit = NO_CHANGE;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
try_fallback:
|
|
/*
|
|
* perf stat needs between 5 and 22 fds per CPU. When we run out
|
|
* of them try to increase the limits.
|
|
*/
|
|
if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
|
|
struct rlimit l;
|
|
int old_errno = errno;
|
|
|
|
if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
|
|
if (set_rlimit == NO_CHANGE)
|
|
l.rlim_cur = l.rlim_max;
|
|
else {
|
|
l.rlim_cur = l.rlim_max + 1000;
|
|
l.rlim_max = l.rlim_cur;
|
|
}
|
|
if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
|
|
set_rlimit++;
|
|
errno = old_errno;
|
|
goto retry_open;
|
|
}
|
|
}
|
|
errno = old_errno;
|
|
}
|
|
|
|
if (err != -EINVAL || cpu > 0 || thread > 0)
|
|
goto out_close;
|
|
|
|
if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
|
|
perf_missing_features.mmap2 = true;
|
|
goto fallback_missing_features;
|
|
} else if (!perf_missing_features.exclude_guest &&
|
|
(evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
|
|
perf_missing_features.exclude_guest = true;
|
|
goto fallback_missing_features;
|
|
} else if (!perf_missing_features.sample_id_all) {
|
|
perf_missing_features.sample_id_all = true;
|
|
goto retry_sample_id;
|
|
}
|
|
|
|
out_close:
|
|
do {
|
|
while (--thread >= 0) {
|
|
close(FD(evsel, cpu, thread));
|
|
FD(evsel, cpu, thread) = -1;
|
|
}
|
|
thread = threads->nr;
|
|
} while (--cpu >= 0);
|
|
return err;
|
|
}
|
|
|
|
void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
|
|
{
|
|
if (evsel->fd == NULL)
|
|
return;
|
|
|
|
perf_evsel__close_fd(evsel, ncpus, nthreads);
|
|
perf_evsel__free_fd(evsel);
|
|
}
|
|
|
|
static struct {
|
|
struct cpu_map map;
|
|
int cpus[1];
|
|
} empty_cpu_map = {
|
|
.map.nr = 1,
|
|
.cpus = { -1, },
|
|
};
|
|
|
|
static struct {
|
|
struct thread_map map;
|
|
int threads[1];
|
|
} empty_thread_map = {
|
|
.map.nr = 1,
|
|
.threads = { -1, },
|
|
};
|
|
|
|
int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
|
|
struct thread_map *threads)
|
|
{
|
|
if (cpus == NULL) {
|
|
/* Work around old compiler warnings about strict aliasing */
|
|
cpus = &empty_cpu_map.map;
|
|
}
|
|
|
|
if (threads == NULL)
|
|
threads = &empty_thread_map.map;
|
|
|
|
return __perf_evsel__open(evsel, cpus, threads);
|
|
}
|
|
|
|
int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
|
|
struct cpu_map *cpus)
|
|
{
|
|
return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
|
|
}
|
|
|
|
int perf_evsel__open_per_thread(struct perf_evsel *evsel,
|
|
struct thread_map *threads)
|
|
{
|
|
return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
|
|
}
|
|
|
|
static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
|
|
const union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
u64 type = evsel->attr.sample_type;
|
|
const u64 *array = event->sample.array;
|
|
bool swapped = evsel->needs_swap;
|
|
union u64_swap u;
|
|
|
|
array += ((event->header.size -
|
|
sizeof(event->header)) / sizeof(u64)) - 1;
|
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER) {
|
|
sample->id = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
}
|
|
|
|
sample->cpu = u.val32[0];
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
sample->stream_id = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ID) {
|
|
sample->id = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
sample->time = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
}
|
|
|
|
sample->pid = u.val32[0];
|
|
sample->tid = u.val32[1];
|
|
array--;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline bool overflow(const void *endp, u16 max_size, const void *offset,
|
|
u64 size)
|
|
{
|
|
return size > max_size || offset + size > endp;
|
|
}
|
|
|
|
#define OVERFLOW_CHECK(offset, size, max_size) \
|
|
do { \
|
|
if (overflow(endp, (max_size), (offset), (size))) \
|
|
return -EFAULT; \
|
|
} while (0)
|
|
|
|
#define OVERFLOW_CHECK_u64(offset) \
|
|
OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
|
|
|
|
int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
|
|
struct perf_sample *data)
|
|
{
|
|
u64 type = evsel->attr.sample_type;
|
|
bool swapped = evsel->needs_swap;
|
|
const u64 *array;
|
|
u16 max_size = event->header.size;
|
|
const void *endp = (void *)event + max_size;
|
|
u64 sz;
|
|
|
|
/*
|
|
* used for cross-endian analysis. See git commit 65014ab3
|
|
* for why this goofiness is needed.
|
|
*/
|
|
union u64_swap u;
|
|
|
|
memset(data, 0, sizeof(*data));
|
|
data->cpu = data->pid = data->tid = -1;
|
|
data->stream_id = data->id = data->time = -1ULL;
|
|
data->period = 1;
|
|
data->weight = 0;
|
|
|
|
if (event->header.type != PERF_RECORD_SAMPLE) {
|
|
if (!evsel->attr.sample_id_all)
|
|
return 0;
|
|
return perf_evsel__parse_id_sample(evsel, event, data);
|
|
}
|
|
|
|
array = event->sample.array;
|
|
|
|
/*
|
|
* The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
|
|
* up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
|
|
* check the format does not go past the end of the event.
|
|
*/
|
|
if (evsel->sample_size + sizeof(event->header) > event->header.size)
|
|
return -EFAULT;
|
|
|
|
data->id = -1ULL;
|
|
if (type & PERF_SAMPLE_IDENTIFIER) {
|
|
data->id = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_IP) {
|
|
data->ip = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
}
|
|
|
|
data->pid = u.val32[0];
|
|
data->tid = u.val32[1];
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
data->time = *array;
|
|
array++;
|
|
}
|
|
|
|
data->addr = 0;
|
|
if (type & PERF_SAMPLE_ADDR) {
|
|
data->addr = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ID) {
|
|
data->id = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
data->stream_id = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
}
|
|
|
|
data->cpu = u.val32[0];
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PERIOD) {
|
|
data->period = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_READ) {
|
|
u64 read_format = evsel->attr.read_format;
|
|
|
|
OVERFLOW_CHECK_u64(array);
|
|
if (read_format & PERF_FORMAT_GROUP)
|
|
data->read.group.nr = *array;
|
|
else
|
|
data->read.one.value = *array;
|
|
|
|
array++;
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->read.time_enabled = *array;
|
|
array++;
|
|
}
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->read.time_running = *array;
|
|
array++;
|
|
}
|
|
|
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
const u64 max_group_nr = UINT64_MAX /
|
|
sizeof(struct sample_read_value);
|
|
|
|
if (data->read.group.nr > max_group_nr)
|
|
return -EFAULT;
|
|
sz = data->read.group.nr *
|
|
sizeof(struct sample_read_value);
|
|
OVERFLOW_CHECK(array, sz, max_size);
|
|
data->read.group.values =
|
|
(struct sample_read_value *)array;
|
|
array = (void *)array + sz;
|
|
} else {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->read.one.id = *array;
|
|
array++;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) {
|
|
const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
|
|
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->callchain = (struct ip_callchain *)array++;
|
|
if (data->callchain->nr > max_callchain_nr)
|
|
return -EFAULT;
|
|
sz = data->callchain->nr * sizeof(u64);
|
|
OVERFLOW_CHECK(array, sz, max_size);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_RAW) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
u.val64 = *array;
|
|
if (WARN_ONCE(swapped,
|
|
"Endianness of raw data not corrected!\n")) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
}
|
|
data->raw_size = u.val32[0];
|
|
array = (void *)array + sizeof(u32);
|
|
|
|
OVERFLOW_CHECK(array, data->raw_size, max_size);
|
|
data->raw_data = (void *)array;
|
|
array = (void *)array + data->raw_size;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) {
|
|
const u64 max_branch_nr = UINT64_MAX /
|
|
sizeof(struct branch_entry);
|
|
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->branch_stack = (struct branch_stack *)array++;
|
|
|
|
if (data->branch_stack->nr > max_branch_nr)
|
|
return -EFAULT;
|
|
sz = data->branch_stack->nr * sizeof(struct branch_entry);
|
|
OVERFLOW_CHECK(array, sz, max_size);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_USER) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->user_regs.abi = *array;
|
|
array++;
|
|
|
|
if (data->user_regs.abi) {
|
|
u64 regs_user = evsel->attr.sample_regs_user;
|
|
|
|
sz = hweight_long(regs_user) * sizeof(u64);
|
|
OVERFLOW_CHECK(array, sz, max_size);
|
|
data->user_regs.regs = (u64 *)array;
|
|
array = (void *)array + sz;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STACK_USER) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
sz = *array++;
|
|
|
|
data->user_stack.offset = ((char *)(array - 1)
|
|
- (char *) event);
|
|
|
|
if (!sz) {
|
|
data->user_stack.size = 0;
|
|
} else {
|
|
OVERFLOW_CHECK(array, sz, max_size);
|
|
data->user_stack.data = (char *)array;
|
|
array = (void *)array + sz;
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->user_stack.size = *array++;
|
|
if (WARN_ONCE(data->user_stack.size > sz,
|
|
"user stack dump failure\n"))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
data->weight = 0;
|
|
if (type & PERF_SAMPLE_WEIGHT) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->weight = *array;
|
|
array++;
|
|
}
|
|
|
|
data->data_src = PERF_MEM_DATA_SRC_NONE;
|
|
if (type & PERF_SAMPLE_DATA_SRC) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->data_src = *array;
|
|
array++;
|
|
}
|
|
|
|
data->transaction = 0;
|
|
if (type & PERF_SAMPLE_TRANSACTION) {
|
|
OVERFLOW_CHECK_u64(array);
|
|
data->transaction = *array;
|
|
array++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
|
|
u64 sample_regs_user, u64 read_format)
|
|
{
|
|
size_t sz, result = sizeof(struct sample_event);
|
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_IP)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_TID)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_TIME)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_ADDR)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_ID)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_CPU)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_PERIOD)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_READ) {
|
|
result += sizeof(u64);
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
|
|
result += sizeof(u64);
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
|
|
result += sizeof(u64);
|
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
sz = sample->read.group.nr *
|
|
sizeof(struct sample_read_value);
|
|
result += sz;
|
|
} else {
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) {
|
|
sz = (sample->callchain->nr + 1) * sizeof(u64);
|
|
result += sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_RAW) {
|
|
result += sizeof(u32);
|
|
result += sample->raw_size;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) {
|
|
sz = sample->branch_stack->nr * sizeof(struct branch_entry);
|
|
sz += sizeof(u64);
|
|
result += sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_USER) {
|
|
if (sample->user_regs.abi) {
|
|
result += sizeof(u64);
|
|
sz = hweight_long(sample_regs_user) * sizeof(u64);
|
|
result += sz;
|
|
} else {
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STACK_USER) {
|
|
sz = sample->user_stack.size;
|
|
result += sizeof(u64);
|
|
if (sz) {
|
|
result += sz;
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_WEIGHT)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_DATA_SRC)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_TRANSACTION)
|
|
result += sizeof(u64);
|
|
|
|
return result;
|
|
}
|
|
|
|
int perf_event__synthesize_sample(union perf_event *event, u64 type,
|
|
u64 sample_regs_user, u64 read_format,
|
|
const struct perf_sample *sample,
|
|
bool swapped)
|
|
{
|
|
u64 *array;
|
|
size_t sz;
|
|
/*
|
|
* used for cross-endian analysis. See git commit 65014ab3
|
|
* for why this goofiness is needed.
|
|
*/
|
|
union u64_swap u;
|
|
|
|
array = event->sample.array;
|
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER) {
|
|
*array = sample->id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_IP) {
|
|
*array = sample->ip;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val32[0] = sample->pid;
|
|
u.val32[1] = sample->tid;
|
|
if (swapped) {
|
|
/*
|
|
* Inverse of what is done in perf_evsel__parse_sample
|
|
*/
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
u.val64 = bswap_64(u.val64);
|
|
}
|
|
|
|
*array = u.val64;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
*array = sample->time;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ADDR) {
|
|
*array = sample->addr;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ID) {
|
|
*array = sample->id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
*array = sample->stream_id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
u.val32[0] = sample->cpu;
|
|
if (swapped) {
|
|
/*
|
|
* Inverse of what is done in perf_evsel__parse_sample
|
|
*/
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val64 = bswap_64(u.val64);
|
|
}
|
|
*array = u.val64;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PERIOD) {
|
|
*array = sample->period;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_READ) {
|
|
if (read_format & PERF_FORMAT_GROUP)
|
|
*array = sample->read.group.nr;
|
|
else
|
|
*array = sample->read.one.value;
|
|
array++;
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
|
|
*array = sample->read.time_enabled;
|
|
array++;
|
|
}
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
|
|
*array = sample->read.time_running;
|
|
array++;
|
|
}
|
|
|
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
sz = sample->read.group.nr *
|
|
sizeof(struct sample_read_value);
|
|
memcpy(array, sample->read.group.values, sz);
|
|
array = (void *)array + sz;
|
|
} else {
|
|
*array = sample->read.one.id;
|
|
array++;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) {
|
|
sz = (sample->callchain->nr + 1) * sizeof(u64);
|
|
memcpy(array, sample->callchain, sz);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_RAW) {
|
|
u.val32[0] = sample->raw_size;
|
|
if (WARN_ONCE(swapped,
|
|
"Endianness of raw data not corrected!\n")) {
|
|
/*
|
|
* Inverse of what is done in perf_evsel__parse_sample
|
|
*/
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
u.val64 = bswap_64(u.val64);
|
|
}
|
|
*array = u.val64;
|
|
array = (void *)array + sizeof(u32);
|
|
|
|
memcpy(array, sample->raw_data, sample->raw_size);
|
|
array = (void *)array + sample->raw_size;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) {
|
|
sz = sample->branch_stack->nr * sizeof(struct branch_entry);
|
|
sz += sizeof(u64);
|
|
memcpy(array, sample->branch_stack, sz);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_USER) {
|
|
if (sample->user_regs.abi) {
|
|
*array++ = sample->user_regs.abi;
|
|
sz = hweight_long(sample_regs_user) * sizeof(u64);
|
|
memcpy(array, sample->user_regs.regs, sz);
|
|
array = (void *)array + sz;
|
|
} else {
|
|
*array++ = 0;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STACK_USER) {
|
|
sz = sample->user_stack.size;
|
|
*array++ = sz;
|
|
if (sz) {
|
|
memcpy(array, sample->user_stack.data, sz);
|
|
array = (void *)array + sz;
|
|
*array++ = sz;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_WEIGHT) {
|
|
*array = sample->weight;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_DATA_SRC) {
|
|
*array = sample->data_src;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TRANSACTION) {
|
|
*array = sample->transaction;
|
|
array++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
|
|
{
|
|
return pevent_find_field(evsel->tp_format, name);
|
|
}
|
|
|
|
void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
|
|
const char *name)
|
|
{
|
|
struct format_field *field = perf_evsel__field(evsel, name);
|
|
int offset;
|
|
|
|
if (!field)
|
|
return NULL;
|
|
|
|
offset = field->offset;
|
|
|
|
if (field->flags & FIELD_IS_DYNAMIC) {
|
|
offset = *(int *)(sample->raw_data + field->offset);
|
|
offset &= 0xffff;
|
|
}
|
|
|
|
return sample->raw_data + offset;
|
|
}
|
|
|
|
u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
|
|
const char *name)
|
|
{
|
|
struct format_field *field = perf_evsel__field(evsel, name);
|
|
void *ptr;
|
|
u64 value;
|
|
|
|
if (!field)
|
|
return 0;
|
|
|
|
ptr = sample->raw_data + field->offset;
|
|
|
|
switch (field->size) {
|
|
case 1:
|
|
return *(u8 *)ptr;
|
|
case 2:
|
|
value = *(u16 *)ptr;
|
|
break;
|
|
case 4:
|
|
value = *(u32 *)ptr;
|
|
break;
|
|
case 8:
|
|
value = *(u64 *)ptr;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
if (!evsel->needs_swap)
|
|
return value;
|
|
|
|
switch (field->size) {
|
|
case 2:
|
|
return bswap_16(value);
|
|
case 4:
|
|
return bswap_32(value);
|
|
case 8:
|
|
return bswap_64(value);
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int ret = 0;
|
|
|
|
if (!*first) {
|
|
ret += fprintf(fp, ",");
|
|
} else {
|
|
ret += fprintf(fp, ":");
|
|
*first = false;
|
|
}
|
|
|
|
va_start(args, fmt);
|
|
ret += vfprintf(fp, fmt, args);
|
|
va_end(args);
|
|
return ret;
|
|
}
|
|
|
|
static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value)
|
|
{
|
|
if (value == 0)
|
|
return 0;
|
|
|
|
return comma_fprintf(fp, first, " %s: %" PRIu64, field, value);
|
|
}
|
|
|
|
#define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field)
|
|
|
|
struct bit_names {
|
|
int bit;
|
|
const char *name;
|
|
};
|
|
|
|
static int bits__fprintf(FILE *fp, const char *field, u64 value,
|
|
struct bit_names *bits, bool *first)
|
|
{
|
|
int i = 0, printed = comma_fprintf(fp, first, " %s: ", field);
|
|
bool first_bit = true;
|
|
|
|
do {
|
|
if (value & bits[i].bit) {
|
|
printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name);
|
|
first_bit = false;
|
|
}
|
|
} while (bits[++i].name != NULL);
|
|
|
|
return printed;
|
|
}
|
|
|
|
static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
|
|
{
|
|
#define bit_name(n) { PERF_SAMPLE_##n, #n }
|
|
struct bit_names bits[] = {
|
|
bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
|
|
bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
|
|
bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
|
|
bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
|
|
bit_name(IDENTIFIER),
|
|
{ .name = NULL, }
|
|
};
|
|
#undef bit_name
|
|
return bits__fprintf(fp, "sample_type", value, bits, first);
|
|
}
|
|
|
|
static int read_format__fprintf(FILE *fp, bool *first, u64 value)
|
|
{
|
|
#define bit_name(n) { PERF_FORMAT_##n, #n }
|
|
struct bit_names bits[] = {
|
|
bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
|
|
bit_name(ID), bit_name(GROUP),
|
|
{ .name = NULL, }
|
|
};
|
|
#undef bit_name
|
|
return bits__fprintf(fp, "read_format", value, bits, first);
|
|
}
|
|
|
|
int perf_evsel__fprintf(struct perf_evsel *evsel,
|
|
struct perf_attr_details *details, FILE *fp)
|
|
{
|
|
bool first = true;
|
|
int printed = 0;
|
|
|
|
if (details->event_group) {
|
|
struct perf_evsel *pos;
|
|
|
|
if (!perf_evsel__is_group_leader(evsel))
|
|
return 0;
|
|
|
|
if (evsel->nr_members > 1)
|
|
printed += fprintf(fp, "%s{", evsel->group_name ?: "");
|
|
|
|
printed += fprintf(fp, "%s", perf_evsel__name(evsel));
|
|
for_each_group_member(pos, evsel)
|
|
printed += fprintf(fp, ",%s", perf_evsel__name(pos));
|
|
|
|
if (evsel->nr_members > 1)
|
|
printed += fprintf(fp, "}");
|
|
goto out;
|
|
}
|
|
|
|
printed += fprintf(fp, "%s", perf_evsel__name(evsel));
|
|
|
|
if (details->verbose || details->freq) {
|
|
printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
|
|
(u64)evsel->attr.sample_freq);
|
|
}
|
|
|
|
if (details->verbose) {
|
|
if_print(type);
|
|
if_print(config);
|
|
if_print(config1);
|
|
if_print(config2);
|
|
if_print(size);
|
|
printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type);
|
|
if (evsel->attr.read_format)
|
|
printed += read_format__fprintf(fp, &first, evsel->attr.read_format);
|
|
if_print(disabled);
|
|
if_print(inherit);
|
|
if_print(pinned);
|
|
if_print(exclusive);
|
|
if_print(exclude_user);
|
|
if_print(exclude_kernel);
|
|
if_print(exclude_hv);
|
|
if_print(exclude_idle);
|
|
if_print(mmap);
|
|
if_print(mmap2);
|
|
if_print(comm);
|
|
if_print(freq);
|
|
if_print(inherit_stat);
|
|
if_print(enable_on_exec);
|
|
if_print(task);
|
|
if_print(watermark);
|
|
if_print(precise_ip);
|
|
if_print(mmap_data);
|
|
if_print(sample_id_all);
|
|
if_print(exclude_host);
|
|
if_print(exclude_guest);
|
|
if_print(__reserved_1);
|
|
if_print(wakeup_events);
|
|
if_print(bp_type);
|
|
if_print(branch_sample_type);
|
|
}
|
|
out:
|
|
fputc('\n', fp);
|
|
return ++printed;
|
|
}
|
|
|
|
bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
|
|
char *msg, size_t msgsize)
|
|
{
|
|
if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
|
|
evsel->attr.type == PERF_TYPE_HARDWARE &&
|
|
evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
|
|
/*
|
|
* If it's cycles then fall back to hrtimer based
|
|
* cpu-clock-tick sw counter, which is always available even if
|
|
* no PMU support.
|
|
*
|
|
* PPC returns ENXIO until 2.6.37 (behavior changed with commit
|
|
* b0a873e).
|
|
*/
|
|
scnprintf(msg, msgsize, "%s",
|
|
"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
|
|
|
|
evsel->attr.type = PERF_TYPE_SOFTWARE;
|
|
evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
|
|
|
|
zfree(&evsel->name);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
|
|
int err, char *msg, size_t size)
|
|
{
|
|
switch (err) {
|
|
case EPERM:
|
|
case EACCES:
|
|
return scnprintf(msg, size,
|
|
"You may not have permission to collect %sstats.\n"
|
|
"Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
|
|
" -1 - Not paranoid at all\n"
|
|
" 0 - Disallow raw tracepoint access for unpriv\n"
|
|
" 1 - Disallow cpu events for unpriv\n"
|
|
" 2 - Disallow kernel profiling for unpriv",
|
|
target->system_wide ? "system-wide " : "");
|
|
case ENOENT:
|
|
return scnprintf(msg, size, "The %s event is not supported.",
|
|
perf_evsel__name(evsel));
|
|
case EMFILE:
|
|
return scnprintf(msg, size, "%s",
|
|
"Too many events are opened.\n"
|
|
"Try again after reducing the number of events.");
|
|
case ENODEV:
|
|
if (target->cpu_list)
|
|
return scnprintf(msg, size, "%s",
|
|
"No such device - did you specify an out-of-range profile CPU?\n");
|
|
break;
|
|
case EOPNOTSUPP:
|
|
if (evsel->attr.precise_ip)
|
|
return scnprintf(msg, size, "%s",
|
|
"\'precise\' request may not be supported. Try removing 'p' modifier.");
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
if (evsel->attr.type == PERF_TYPE_HARDWARE)
|
|
return scnprintf(msg, size, "%s",
|
|
"No hardware sampling interrupt available.\n"
|
|
"No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
|
|
#endif
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return scnprintf(msg, size,
|
|
"The sys_perf_event_open() syscall returned with %d (%s) for event (%s). \n"
|
|
"/bin/dmesg may provide additional information.\n"
|
|
"No CONFIG_PERF_EVENTS=y kernel support configured?\n",
|
|
err, strerror(err), perf_evsel__name(evsel));
|
|
}
|