diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-05-25 14:45:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-25 14:55:01 +0200 |
| commit | 10989fb2451763fae6f42d85fa6106c8fd010cf5 (patch) | |
| tree | 34c1b66501633ac3c0c287f72611eccc90ee1bc2 /kernel/perf_counter.c | |
| parent | perf_counter: Propagate inheritance failures down the fork() path (diff) | |
| download | linux-10989fb2451763fae6f42d85fa6106c8fd010cf5.tar.xz linux-10989fb2451763fae6f42d85fa6106c8fd010cf5.zip | |
perf_counter: Fix PERF_COUNTER_CONTEXT_SWITCHES for cpu counters
Ingo noticed that cpu counters had 0 context switches, even though
there was plenty scheduling on the cpu.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <20090525124600.419025548@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_counter.c')
| -rw-r--r-- | kernel/perf_counter.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index 7a7a144870ef..14b1fe984832 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -924,14 +924,13 @@ void perf_counter_task_sched_out(struct task_struct *task, struct perf_counter_context *next_ctx; struct pt_regs *regs; + regs = task_pt_regs(task); + perf_swcounter_event(PERF_COUNT_CONTEXT_SWITCHES, 1, 1, regs, 0); + if (likely(!ctx || !cpuctx->task_ctx)) return; update_context_time(ctx); - - regs = task_pt_regs(task); - perf_swcounter_event(PERF_COUNT_CONTEXT_SWITCHES, 1, 1, regs, 0); - next_ctx = next->perf_counter_ctxp; if (next_ctx && context_equiv(ctx, next_ctx)) { task->perf_counter_ctxp = next_ctx; |