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perf sched: Add runtime stats

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Extend the latency tracking structure with scheduling atom
runtime info - and sum it up during per task display.

(Also clean up a few details.)

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-09-12 10:08:34 +02:00
parent d9340c1db3
commit ea92ed5a8f
1 changed files with 38 additions and 20 deletions
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34
tools/perf/builtin-sched.c
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@ -877,6 +877,7 @@ struct lat_snapshot {
enum thread_state state;
u64 wake_up_time;
u64 sched_in_time;
u64 runtime;
};
struct thread_latency {
@ -951,6 +952,7 @@ latency_fork_event(struct trace_fork_event *fork_event __used,
/* should insert the newcomer */
}
__used
static char sched_out_state(struct trace_switch_event *switch_event)
{
const char *str = TASK_STATE_TO_CHAR_STR;
@ -960,17 +962,15 @@ static char sched_out_state(struct trace_switch_event *switch_event)
static void
lat_sched_out(struct thread_latency *lat,
struct trace_switch_event *switch_event)
struct trace_switch_event *switch_event __used, u64 delta)
{
struct lat_snapshot *snapshot;
if (sched_out_state(switch_event) == 'R')
return;
snapshot = calloc(sizeof(*snapshot), 1);
if (!snapshot)
die("Non memory");
snapshot->runtime = delta;
list_add_tail(&snapshot->list, &lat->snapshot_list);
}
@ -997,16 +997,31 @@ lat_sched_in(struct thread_latency *lat, u64 timestamp)
snapshot->sched_in_time = timestamp;
}
static void
latency_switch_event(struct trace_switch_event *switch_event,
struct event *event __used,
int cpu __used,
int cpu,
u64 timestamp,
struct thread *thread __used)
{
struct thread_latency *out_lat, *in_lat;
struct thread *sched_out, *sched_in;
u64 timestamp0;
s64 delta;
if (cpu >= MAX_CPUS || cpu < 0)
return;
timestamp0 = cpu_last_switched[cpu];
cpu_last_switched[cpu] = timestamp;
if (timestamp0)
delta = timestamp - timestamp0;
else
delta = 0;
if (delta < 0)
die("hm, delta: %Ld < 0 ?\n", delta);
sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
@ -1028,7 +1043,7 @@ latency_switch_event(struct trace_switch_event *switch_event,
}
lat_sched_in(in_lat, timestamp);
lat_sched_out(out_lat, switch_event);
lat_sched_out(out_lat, switch_event, delta);
}
static void
@ -1080,8 +1095,11 @@ static void output_lat_thread(struct thread_latency *lat)
int ret;
u64 max = 0, avg;
u64 total = 0, delta;
u64 total_runtime = 0;
list_for_each_entry(shot, &lat->snapshot_list, list) {
total_runtime += shot->runtime;
if (shot->state != THREAD_SCHED_IN)
continue;
@ -1104,7 +1122,7 @@ static void output_lat_thread(struct thread_latency *lat)
avg = total / count;
printf("|%9.3f ms |%9d | avg:%9.3f ms | max:%9.3f ms |\n",
0.0, count, (double)avg/1e9, (double)max/1e9);
(double)total_runtime/1e9, count, (double)avg/1e9, (double)max/1e9);
}
static void __cmd_lat(void)