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| author | Robert Richter <robert.richter@amd.com> | 2010-04-14 00:23:10 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-07 13:30:59 +0400 |
| commit | 4261e0e0efd9e04b6c69e0773c3cf4d6f337c416 (patch) | |
| tree | 47651cefd3e6c89a7acdc2d16d40cc7d384d3231 | |
| parent | a0507c84bf47dfd204299774f45fd16da33f0619 (diff) | |
| download | linux-4261e0e0efd9e04b6c69e0773c3cf4d6f337c416.tar.xz | |
perf, x86: Move perfctr init code to x86_setup_perfctr()
Split __hw_perf_event_init() to configure pmu events other than
perfctrs. Perfctr code is moved to a separate function
x86_setup_perfctr(). This and the following patches refactor the code.
Split in multiple patches for better review.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1271190201-25705-2-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 7de70613e6c3..801441a54245 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -426,6 +426,8 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event_attr *attr) return 0; } +static int x86_setup_perfctr(struct perf_event *event); + static int x86_pmu_hw_config(struct perf_event *event) { /* @@ -453,9 +455,6 @@ static int x86_pmu_hw_config(struct perf_event *event) */ static int __hw_perf_event_init(struct perf_event *event) { - struct perf_event_attr *attr = &event->attr; - struct hw_perf_event *hwc = &event->hw; - u64 config; int err; if (!x86_pmu_initialized()) @@ -482,15 +481,24 @@ static int __hw_perf_event_init(struct perf_event *event) event->destroy = hw_perf_event_destroy; - hwc->idx = -1; - hwc->last_cpu = -1; - hwc->last_tag = ~0ULL; + event->hw.idx = -1; + event->hw.last_cpu = -1; + event->hw.last_tag = ~0ULL; /* Processor specifics */ err = x86_pmu.hw_config(event); if (err) return err; + return x86_setup_perfctr(event); +} + +static int x86_setup_perfctr(struct perf_event *event) +{ + struct perf_event_attr *attr = &event->attr; + struct hw_perf_event *hwc = &event->hw; + u64 config; + if (!hwc->sample_period) { hwc->sample_period = x86_pmu.max_period; hwc->last_period = hwc->sample_period; |