diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2009-12-01 17:30:08 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-18 14:03:08 -0800 |
| commit | b7b4aef82aeef0d9408951c8d1e7a2a6dd359921 (patch) | |
| tree | 4961d43d568f64a30240aa76cc7cb5c18a25e4ce /kernel | |
| parent | c64d2a3d2c5f192d859374e943968439afb0f995 (diff) | |
perf_event: Initialize data.period in perf_swevent_hrtimer()
commit 59d069eb5ae9b033ed1c124c92e1532c4a958991 upstream.
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>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14E220.2050107@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | 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 7f29643c8985..d16999c30ad2 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -3949,6 +3949,7 @@ 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 |