Commit-ID: 10989fb2451763fae6f42d85fa6106c8fd010cf5
Gitweb: http://git.kernel.org/tip/10989fb2451763fae6f42d85fa6106c8fd010cf5
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Mon, 25 May 2009 14:45:28 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 25 May 2009 14:55:01 +0200
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@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: John Kacur <jkacur@xxxxxxxxxx>
LKML-Reference: <20090525124600.419025548@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
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 7a7a144..14b1fe9 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;
--
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