[tip:perfcounters/core] perf_counter: x86: Set the period in the intel overflow handler

tip-bot for Peter Zijlstra
2009-06-17T17:28:46Z

Commit-ID: 60f916dee612130c9977a8edd4abee98334202ba
Gitweb: http://git.kernel.org/tip/60f916dee612130c9977a8edd4abee98334202ba
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Mon, 15 Jun 2009 19:00:20 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 17 Jun 2009 19:23:52 +0200

perf_counter: x86: Set the period in the intel overflow handler

Commit 9e350de37ac960 ("perf_counter: Accurate period data")
missed a spot, which caused all Intel-PMU samples to have a
period of 0.

This broke auto-freq sampling.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
arch/x86/kernel/cpu/perf_counter.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index e8c68a5..ce1ae3f 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -1224,6 +1224,8 @@ again:
if (!intel_pmu_save_and_restart(counter))
continue;

+ data.period = counter->hw.last_period;
+
if (perf_counter_overflow(counter, 1, &data))
intel_pmu_disable_counter(&counter->hw, bit);
}