Messages in this thread Patch in this message | | | Date | Tue, 01 Dec 2009 17:30:08 +0800 | From | Xiao Guangrong <> | Subject | [PATCH] perf_event: initialize data.period in perf_swevent_hrtimer() |
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In current code in perf_swevent_hrtimer(), data.period is not initialized, The result is obvious wrong:
# ./perf record -f -e cpu-clock make # ./perf report # Samples: 1740 # # Overhead Command ...... # ........ ........ .......................................... # 1025422183050275328.00% sh libc-2.9.90.so ... 1025422183050275328.00% perl libperl.so ... 1025422168240043264.00% perl [kernel] ... 1025422030011210752.00% perl [kernel] ...
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> --- kernel/perf_event.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 0b9ca2d..040ee51 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -4010,6 +4010,7 @@ static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer) event->pmu->read(event); data.addr = 0; + data.period = event->hw.last_period; regs = get_irq_regs(); /* * In case we exclude kernel IPs or are somehow not in interrupt -- 1.6.1.2
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