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author | Robert Richter <robert.richter@amd.com> | 2010-10-11 19:26:50 +0200 |
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committer | Robert Richter <robert.richter@amd.com> | 2010-10-11 19:26:50 +0200 |
commit | ad0f7cfaa85fc033523a09ab1f3dd6b8ded3dff5 (patch) | |
tree | 2565121e4b9945d953e02c77a2e53065b3789aa4 /kernel/perf_event.c | |
parent | 86c8c04792f152c5469023885510140dd34817bc (diff) | |
parent | c7a27aa4652c63172489a73f3961455650a79a7f (diff) | |
download | lwn-ad0f7cfaa85fc033523a09ab1f3dd6b8ded3dff5.tar.gz lwn-ad0f7cfaa85fc033523a09ab1f3dd6b8ded3dff5.zip |
Merge branch 'oprofile/urgent' (early part) into oprofile/perf
Diffstat (limited to 'kernel/perf_event.c')
-rw-r--r-- | kernel/perf_event.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index e2534691db0d..fc512684423f 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -407,11 +407,31 @@ static void perf_group_detach(struct perf_event *event) } } +static inline int +event_filter_match(struct perf_event *event) +{ + return event->cpu == -1 || event->cpu == smp_processor_id(); +} + static void event_sched_out(struct perf_event *event, struct perf_cpu_context *cpuctx, struct perf_event_context *ctx) { + u64 delta; + /* + * An event which could not be activated because of + * filter mismatch still needs to have its timings + * maintained, otherwise bogus information is return + * via read() for time_enabled, time_running: + */ + if (event->state == PERF_EVENT_STATE_INACTIVE + && !event_filter_match(event)) { + delta = ctx->time - event->tstamp_stopped; + event->tstamp_running += delta; + event->tstamp_stopped = ctx->time; + } + if (event->state != PERF_EVENT_STATE_ACTIVE) return; @@ -437,9 +457,7 @@ group_sched_out(struct perf_event *group_event, struct perf_event_context *ctx) { struct perf_event *event; - - if (group_event->state != PERF_EVENT_STATE_ACTIVE) - return; + int state = group_event->state; event_sched_out(group_event, cpuctx, ctx); @@ -449,7 +467,7 @@ group_sched_out(struct perf_event *group_event, list_for_each_entry(event, &group_event->sibling_list, group_entry) event_sched_out(event, cpuctx, ctx); - if (group_event->attr.exclusive) + if (state == PERF_EVENT_STATE_ACTIVE && group_event->attr.exclusive) cpuctx->exclusive = 0; } @@ -5748,15 +5766,15 @@ perf_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) { unsigned int cpu = (long)hcpu; - switch (action) { + switch (action & ~CPU_TASKS_FROZEN) { case CPU_UP_PREPARE: - case CPU_UP_PREPARE_FROZEN: + case CPU_DOWN_FAILED: perf_event_init_cpu(cpu); break; + case CPU_UP_CANCELED: case CPU_DOWN_PREPARE: - case CPU_DOWN_PREPARE_FROZEN: perf_event_exit_cpu(cpu); break; |