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-rw-r--r--tools/perf/util/evsel.c234
1 files changed, 215 insertions, 19 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index d8575d31ee6c..662596afd7f1 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1,20 +1,34 @@
+/*
+ * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+ *
+ * Parts came from builtin-{top,stat,record}.c, see those files for further
+ * copyright notes.
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
#include "evsel.h"
-#include "../perf.h"
+#include "evlist.h"
#include "util.h"
#include "cpumap.h"
-#include "thread.h"
+#include "thread_map.h"
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
+void perf_evsel__init(struct perf_evsel *evsel,
+ struct perf_event_attr *attr, int idx)
+{
+ evsel->idx = idx;
+ evsel->attr = *attr;
+ INIT_LIST_HEAD(&evsel->node);
+}
+
struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
{
struct perf_evsel *evsel = zalloc(sizeof(*evsel));
- if (evsel != NULL) {
- evsel->idx = idx;
- evsel->attr = *attr;
- INIT_LIST_HEAD(&evsel->node);
- }
+ if (evsel != NULL)
+ perf_evsel__init(evsel, attr, idx);
return evsel;
}
@@ -25,6 +39,22 @@ int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
return evsel->fd != NULL ? 0 : -ENOMEM;
}
+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;
+}
+
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
{
evsel->counts = zalloc((sizeof(*evsel->counts) +
@@ -38,6 +68,14 @@ void perf_evsel__free_fd(struct perf_evsel *evsel)
evsel->fd = NULL;
}
+void perf_evsel__free_id(struct perf_evsel *evsel)
+{
+ xyarray__delete(evsel->sample_id);
+ evsel->sample_id = NULL;
+ free(evsel->id);
+ evsel->id = NULL;
+}
+
void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
{
int cpu, thread;
@@ -49,10 +87,19 @@ void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
}
}
-void perf_evsel__delete(struct perf_evsel *evsel)
+void perf_evsel__exit(struct perf_evsel *evsel)
{
assert(list_empty(&evsel->node));
xyarray__delete(evsel->fd);
+ xyarray__delete(evsel->sample_id);
+ free(evsel->id);
+}
+
+void perf_evsel__delete(struct perf_evsel *evsel)
+{
+ perf_evsel__exit(evsel);
+ close_cgroup(evsel->cgrp);
+ free(evsel->name);
free(evsel);
}
@@ -128,21 +175,51 @@ int __perf_evsel__read(struct perf_evsel *evsel,
}
static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
- struct thread_map *threads)
+ struct thread_map *threads, bool group, bool inherit)
{
int cpu, thread;
+ unsigned long flags = 0;
+ int pid = -1;
if (evsel->fd == NULL &&
perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
return -1;
+ if (evsel->cgrp) {
+ flags = PERF_FLAG_PID_CGROUP;
+ pid = evsel->cgrp->fd;
+ }
+
for (cpu = 0; cpu < cpus->nr; cpu++) {
+ int group_fd = -1;
+ /*
+ * Don't allow mmap() of inherited per-task counters. This
+ * would create a performance issue due to all children writing
+ * to the same buffer.
+ *
+ * FIXME:
+ * Proper fix is not to pass 'inherit' to perf_evsel__open*,
+ * but a 'flags' parameter, with 'group' folded there as well,
+ * then introduce a PERF_O_{MMAP,GROUP,INHERIT} enum, and if
+ * O_MMAP is set, emit a warning if cpu < 0 and O_INHERIT is
+ * set. Lets go for the minimal fix first tho.
+ */
+ evsel->attr.inherit = (cpus->map[cpu] >= 0) && inherit;
+
for (thread = 0; thread < threads->nr; thread++) {
+
+ if (!evsel->cgrp)
+ pid = threads->map[thread];
+
FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
- threads->map[thread],
- cpus->map[cpu], -1, 0);
+ pid,
+ cpus->map[cpu],
+ group_fd, flags);
if (FD(evsel, cpu, thread) < 0)
goto out_close;
+
+ if (group && group_fd == -1)
+ group_fd = FD(evsel, cpu, thread);
}
}
@@ -175,10 +252,9 @@ static struct {
.threads = { -1, },
};
-int perf_evsel__open(struct perf_evsel *evsel,
- struct cpu_map *cpus, struct thread_map *threads)
+int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
+ struct thread_map *threads, bool group, bool inherit)
{
-
if (cpus == NULL) {
/* Work around old compiler warnings about strict aliasing */
cpus = &empty_cpu_map.map;
@@ -187,15 +263,135 @@ int perf_evsel__open(struct perf_evsel *evsel,
if (threads == NULL)
threads = &empty_thread_map.map;
- return __perf_evsel__open(evsel, cpus, threads);
+ return __perf_evsel__open(evsel, cpus, threads, group, inherit);
}
-int perf_evsel__open_per_cpu(struct perf_evsel *evsel, struct cpu_map *cpus)
+int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
+ struct cpu_map *cpus, bool group, bool inherit)
{
- return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
+ return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group, inherit);
+}
+
+int perf_evsel__open_per_thread(struct perf_evsel *evsel,
+ struct thread_map *threads, bool group, bool inherit)
+{
+ return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group, inherit);
+}
+
+static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
+ struct perf_sample *sample)
+{
+ const u64 *array = event->sample.array;
+
+ array += ((event->header.size -
+ sizeof(event->header)) / sizeof(u64)) - 1;
+
+ if (type & PERF_SAMPLE_CPU) {
+ u32 *p = (u32 *)array;
+ sample->cpu = *p;
+ 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) {
+ u32 *p = (u32 *)array;
+ sample->pid = p[0];
+ sample->tid = p[1];
+ }
+
+ return 0;
}
-int perf_evsel__open_per_thread(struct perf_evsel *evsel, struct thread_map *threads)
+int perf_event__parse_sample(const union perf_event *event, u64 type,
+ bool sample_id_all, struct perf_sample *data)
{
- return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
+ const u64 *array;
+
+ data->cpu = data->pid = data->tid = -1;
+ data->stream_id = data->id = data->time = -1ULL;
+
+ if (event->header.type != PERF_RECORD_SAMPLE) {
+ if (!sample_id_all)
+ return 0;
+ return perf_event__parse_id_sample(event, type, data);
+ }
+
+ array = event->sample.array;
+
+ if (type & PERF_SAMPLE_IP) {
+ data->ip = event->ip.ip;
+ array++;
+ }
+
+ if (type & PERF_SAMPLE_TID) {
+ u32 *p = (u32 *)array;
+ data->pid = p[0];
+ data->tid = p[1];
+ array++;
+ }
+
+ if (type & PERF_SAMPLE_TIME) {
+ data->time = *array;
+ array++;
+ }
+
+ if (type & PERF_SAMPLE_ADDR) {
+ data->addr = *array;
+ array++;
+ }
+
+ data->id = -1ULL;
+ 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) {
+ u32 *p = (u32 *)array;
+ data->cpu = *p;
+ array++;
+ }
+
+ if (type & PERF_SAMPLE_PERIOD) {
+ data->period = *array;
+ array++;
+ }
+
+ if (type & PERF_SAMPLE_READ) {
+ fprintf(stderr, "PERF_SAMPLE_READ is unsuported for now\n");
+ return -1;
+ }
+
+ if (type & PERF_SAMPLE_CALLCHAIN) {
+ data->callchain = (struct ip_callchain *)array;
+ array += 1 + data->callchain->nr;
+ }
+
+ if (type & PERF_SAMPLE_RAW) {
+ u32 *p = (u32 *)array;
+ data->raw_size = *p;
+ p++;
+ data->raw_data = p;
+ }
+
+ return 0;
}
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