From: Thomas Renninger Date: Mon, 3 Jan 2011 16:50:45 +0000 (+0100) Subject: perf timechart: Adjust perf timechart to the new power events X-Git-Tag: tegra-14.ER1-android-2.3~2666^2~11 X-Git-Url: https://nv-tegra.nvidia.com/r/gitweb?p=linux-2.6.git;a=commitdiff_plain;h=20c457b8587bee4644d998331d9e13be82e05b4c;hp=25e41933b58777f2d020c3b0186b430ea004ec28 perf timechart: Adjust perf timechart to the new power events builtin-timechart must only pass -e power:xy events if they are supported by the running kernel, otherwise try to fetch the old power:power{start,end} events. For this I added the tiny helper function: int is_valid_tracepoint(const char *event_string) to parse-events.[hc], which could be more generic as an interface and support hardware/software/... events, not only tracepoints, but someone else could extend that if needed... Signed-off-by: Thomas Renninger Acked-by: Arjan van de Ven Acked-by: Jean Pihet LKML-Reference: <1294073445-14812-4-git-send-email-trenn@suse.de> Signed-off-by: Ingo Molnar --- diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c index d75084bccdb..746cf03cb05 100644 --- a/tools/perf/builtin-timechart.c +++ b/tools/perf/builtin-timechart.c @@ -32,6 +32,10 @@ #include "util/session.h" #include "util/svghelper.h" +#define SUPPORT_OLD_POWER_EVENTS 1 +#define PWR_EVENT_EXIT -1 + + static char const *input_name = "perf.data"; static char const *output_name = "output.svg"; @@ -301,12 +305,21 @@ struct trace_entry { int lock_depth; }; -struct power_entry { +#ifdef SUPPORT_OLD_POWER_EVENTS +static int use_old_power_events; +struct power_entry_old { struct trace_entry te; u64 type; u64 value; u64 cpu_id; }; +#endif + +struct power_processor_entry { + struct trace_entry te; + u32 state; + u32 cpu_id; +}; #define TASK_COMM_LEN 16 struct wakeup_entry { @@ -489,29 +502,49 @@ static int process_sample_event(event_t *event __used, te = (void *)sample->raw_data; if (session->sample_type & PERF_SAMPLE_RAW && sample->raw_size > 0) { char *event_str; - struct power_entry *pe; - - pe = (void *)te; - +#ifdef SUPPORT_OLD_POWER_EVENTS + struct power_entry_old *peo; + peo = (void *)te; +#endif event_str = perf_header__find_event(te->type); if (!event_str) return 0; - if (strcmp(event_str, "power:power_start") == 0) - c_state_start(pe->cpu_id, sample->time, pe->value); - - if (strcmp(event_str, "power:power_end") == 0) - c_state_end(pe->cpu_id, sample->time); - - if (strcmp(event_str, "power:power_frequency") == 0) - p_state_change(pe->cpu_id, sample->time, pe->value); + if (strcmp(event_str, "power:cpu_idle") == 0) { + struct power_processor_entry *ppe = (void *)te; + if (ppe->state == (u32)PWR_EVENT_EXIT) + c_state_end(ppe->cpu_id, sample->time); + else + c_state_start(ppe->cpu_id, sample->time, + ppe->state); + } + else if (strcmp(event_str, "power:cpu_frequency") == 0) { + struct power_processor_entry *ppe = (void *)te; + p_state_change(ppe->cpu_id, sample->time, ppe->state); + } - if (strcmp(event_str, "sched:sched_wakeup") == 0) + else if (strcmp(event_str, "sched:sched_wakeup") == 0) sched_wakeup(sample->cpu, sample->time, sample->pid, te); - if (strcmp(event_str, "sched:sched_switch") == 0) + else if (strcmp(event_str, "sched:sched_switch") == 0) sched_switch(sample->cpu, sample->time, te); + +#ifdef SUPPORT_OLD_POWER_EVENTS + if (use_old_power_events) { + if (strcmp(event_str, "power:power_start") == 0) + c_state_start(peo->cpu_id, sample->time, + peo->value); + + else if (strcmp(event_str, "power:power_end") == 0) + c_state_end(sample->cpu, sample->time); + + else if (strcmp(event_str, + "power:power_frequency") == 0) + p_state_change(peo->cpu_id, sample->time, + peo->value); + } +#endif } return 0; } @@ -969,7 +1002,8 @@ static const char * const timechart_usage[] = { NULL }; -static const char *record_args[] = { +#ifdef SUPPORT_OLD_POWER_EVENTS +static const char * const record_old_args[] = { "record", "-a", "-R", @@ -981,19 +1015,43 @@ static const char *record_args[] = { "-e", "sched:sched_wakeup", "-e", "sched:sched_switch", }; +#endif + +static const char * const record_new_args[] = { + "record", + "-a", + "-R", + "-f", + "-c", "1", + "-e", "power:cpu_frequency", + "-e", "power:cpu_idle", + "-e", "sched:sched_wakeup", + "-e", "sched:sched_switch", +}; static int __cmd_record(int argc, const char **argv) { unsigned int rec_argc, i, j; const char **rec_argv; + const char * const *record_args = record_new_args; + unsigned int record_elems = ARRAY_SIZE(record_new_args); + +#ifdef SUPPORT_OLD_POWER_EVENTS + if (!is_valid_tracepoint("power:cpu_idle") && + is_valid_tracepoint("power:power_start")) { + use_old_power_events = 1; + record_args = record_old_args; + record_elems = ARRAY_SIZE(record_old_args); + } +#endif - rec_argc = ARRAY_SIZE(record_args) + argc - 1; + rec_argc = record_elems + argc - 1; rec_argv = calloc(rec_argc + 1, sizeof(char *)); if (rec_argv == NULL) return -ENOMEM; - for (i = 0; i < ARRAY_SIZE(record_args); i++) + for (i = 0; i < record_elems; i++) rec_argv[i] = strdup(record_args[i]); for (j = 1; j < (unsigned int)argc; j++, i++) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 3a142e90d60..649083f27e0 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -912,6 +912,47 @@ static void print_tracepoint_events(void) closedir(sys_dir); } +/* + * Check whether event is in /tracing/events + */ + +int is_valid_tracepoint(const char *event_string) +{ + DIR *sys_dir, *evt_dir; + struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; + char evt_path[MAXPATHLEN]; + char dir_path[MAXPATHLEN]; + + if (debugfs_valid_mountpoint(debugfs_path)) + return 0; + + sys_dir = opendir(debugfs_path); + if (!sys_dir) + return 0; + + for_each_subsystem(sys_dir, sys_dirent, sys_next) { + + snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path, + sys_dirent.d_name); + evt_dir = opendir(dir_path); + if (!evt_dir) + continue; + + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { + snprintf(evt_path, MAXPATHLEN, "%s:%s", + sys_dirent.d_name, evt_dirent.d_name); + if (!strcmp(evt_path, event_string)) { + closedir(evt_dir); + closedir(sys_dir); + return 1; + } + } + closedir(evt_dir); + } + closedir(sys_dir); + return 0; +} + /* * Print the help text for the event symbols: */ diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index 0a0abc1d10e..1c9043ccd17 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -36,6 +36,7 @@ extern int parse_filter(const struct option *opt, const char *str, int unset); #define EVENTS_HELP_MAX (128*1024) extern void print_events(void); +extern int is_valid_tracepoint(const char *event_string); extern char debugfs_path[]; extern int valid_debugfs_mount(const char *debugfs);