diff options
| -rw-r--r-- | tools/perf/Documentation/perf-inject.txt | 5 | ||||
| -rw-r--r-- | tools/perf/builtin-inject.c | 142 |
2 files changed, 144 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt index 673ef97..a00a342 100644 --- a/tools/perf/Documentation/perf-inject.txt +++ b/tools/perf/Documentation/perf-inject.txt @@ -35,6 +35,11 @@ OPTIONS -o:: --output=:: Output file name. (default: stdout) +-s:: +--sched-stat:: + Merge sched_stat and sched_switch for getting events where and how long + tasks slept. sched_switch contains a callchain where a task slept and + sched_stat contains a timeslice how long a task slept. SEE ALSO -------- diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c index a706ed5..a4a3072 100644 --- a/tools/perf/builtin-inject.c +++ b/tools/perf/builtin-inject.c @@ -8,19 +8,32 @@ #include "builtin.h" #include "perf.h" +#include "util/color.h" +#include "util/evlist.h" +#include "util/evsel.h" #include "util/session.h" #include "util/tool.h" #include "util/debug.h" #include "util/parse-options.h" +#include <linux/list.h> + struct perf_inject { struct perf_tool tool; bool build_ids; + bool sched_stat; const char *input_name; int pipe_output, output; u64 bytes_written; + struct list_head samples; +}; + +struct event_entry { + struct list_head node; + u32 tid; + union perf_event event[0]; }; static int perf_event__repipe_synth(struct perf_tool *tool, @@ -86,12 +99,23 @@ static int perf_event__repipe(struct perf_tool *tool, return perf_event__repipe_synth(tool, event, machine); } +typedef int (*inject_handler)(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine); + static int perf_event__repipe_sample(struct perf_tool *tool, union perf_event *event, - struct perf_sample *sample __maybe_unused, - struct perf_evsel *evsel __maybe_unused, - struct machine *machine) + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) { + if (evsel->handler.func) { + inject_handler f = evsel->handler.func; + return f(tool, event, sample, evsel, machine); + } + return perf_event__repipe_synth(tool, event, machine); } @@ -216,6 +240,79 @@ repipe: return 0; } +static int perf_inject__sched_process_exit(struct perf_tool *tool, + union perf_event *event __maybe_unused, + struct perf_sample *sample, + struct perf_evsel *evsel __maybe_unused, + struct machine *machine __maybe_unused) +{ + struct perf_inject *inject = container_of(tool, struct perf_inject, tool); + struct event_entry *ent; + + list_for_each_entry(ent, &inject->samples, node) { + if (sample->tid == ent->tid) { + list_del_init(&ent->node); + free(ent); + break; + } + } + + return 0; +} + +static int perf_inject__sched_switch(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct perf_inject *inject = container_of(tool, struct perf_inject, tool); + struct event_entry *ent; + + perf_inject__sched_process_exit(tool, event, sample, evsel, machine); + + ent = malloc(event->header.size + sizeof(struct event_entry)); + if (ent == NULL) { + color_fprintf(stderr, PERF_COLOR_RED, + "Not enough memory to process sched switch event!"); + return -1; + } + + ent->tid = sample->tid; + memcpy(&ent->event, event, event->header.size); + list_add(&ent->node, &inject->samples); + return 0; +} + +static int perf_inject__sched_stat(struct perf_tool *tool, + union perf_event *event __maybe_unused, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct event_entry *ent; + union perf_event *event_sw; + struct perf_sample sample_sw; + struct perf_inject *inject = container_of(tool, struct perf_inject, tool); + u32 pid = perf_evsel__intval(evsel, sample, "pid"); + + list_for_each_entry(ent, &inject->samples, node) { + if (pid == ent->tid) + goto found; + } + + return 0; +found: + event_sw = &ent->event[0]; + perf_evsel__parse_sample(evsel, event_sw, &sample_sw); + + sample_sw.period = sample->period; + sample_sw.time = sample->time; + perf_event__synthesize_sample(event_sw, evsel->attr.sample_type, + &sample_sw, false); + return perf_event__repipe(tool, event_sw, &sample_sw, machine); +} + extern volatile int session_done; static void sig_handler(int sig __maybe_unused) @@ -223,6 +320,21 @@ static void sig_handler(int sig __maybe_unused) session_done = 1; } +static int perf_evsel__check_stype(struct perf_evsel *evsel, + u64 sample_type, const char *sample_msg) +{ + struct perf_event_attr *attr = &evsel->attr; + const char *name = perf_evsel__name(evsel); + + if (!(attr->sample_type & sample_type)) { + pr_err("Samples for %s event do not have %s attribute set.", + name, sample_msg); + return -EINVAL; + } + + return 0; +} + static int __cmd_inject(struct perf_inject *inject) { struct perf_session *session; @@ -241,6 +353,26 @@ static int __cmd_inject(struct perf_inject *inject) if (session == NULL) return -ENOMEM; + if (inject->sched_stat) { + struct perf_evsel *evsel; + + inject->tool.ordered_samples = true; + + list_for_each_entry(evsel, &session->evlist->entries, node) { + const char *name = perf_evsel__name(evsel); + + if (!strcmp(name, "sched:sched_switch")) { + if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID")) + return -EINVAL; + + evsel->handler.func = perf_inject__sched_switch; + } else if (!strcmp(name, "sched:sched_process_exit")) + evsel->handler.func = perf_inject__sched_process_exit; + else if (!strncmp(name, "sched:sched_stat_", 17)) + evsel->handler.func = perf_inject__sched_stat; + } + } + if (!inject->pipe_output) lseek(inject->output, session->header.data_offset, SEEK_SET); @@ -275,6 +407,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused) .build_id = perf_event__repipe_op2_synth, }, .input_name = "-", + .samples = LIST_HEAD_INIT(inject.samples), }; const char *output_name = "-"; const struct option options[] = { @@ -284,6 +417,9 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused) "input file name"), OPT_STRING('o', "output", &output_name, "file", "output file name"), + OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat, + "Merge sched-stat and sched-switch for getting events " + "where and how long tasks slept"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show build ids, etc)"), OPT_END() |