Messages in this thread Patch in this message | | | From | Stephane Eranian <> | Subject | [PATCH v2 03/12] perf/x86: add 3 new scheduling callbacks | Date | Thu, 9 Oct 2014 18:34:37 +0200 |
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From: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com>
This patch adds 3 new PMU model specific callbacks during the event scheduling done by x86_schedule_events().
- start_scheduling: invoked when entering the schedule routine. - stop_scheduling: invoked at the end of the schedule routine - commit_scheduling: invoked for each committed event
To be used optionally by model-specific code.
Reviewed-by: Stephane Eranian <eranian@google.com> Signed-off-by: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com> --- arch/x86/kernel/cpu/perf_event.c | 9 +++++++++ arch/x86/kernel/cpu/perf_event.h | 9 +++++++++ 2 files changed, 18 insertions(+)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 542435f..ca44ba2 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -734,6 +734,9 @@ int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign) bitmap_zero(used_mask, X86_PMC_IDX_MAX); + if (x86_pmu.start_scheduling) + x86_pmu.start_scheduling(cpuc); + for (i = 0, wmin = X86_PMC_IDX_MAX, wmax = 0; i < n; i++) { hwc = &cpuc->event_list[i]->hw; c = x86_pmu.get_event_constraints(cpuc, cpuc->event_list[i]); @@ -780,6 +783,8 @@ int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign) for (i = 0; i < n; i++) { e = cpuc->event_list[i]; e->hw.flags |= PERF_X86_EVENT_COMMITTED; + if (x86_pmu.commit_scheduling) + x86_pmu.commit_scheduling(cpuc, e, assign[i]); } } /* @@ -800,6 +805,10 @@ int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign) x86_pmu.put_event_constraints(cpuc, e); } } + + if (x86_pmu.stop_scheduling) + x86_pmu.stop_scheduling(cpuc); + return num ? -EINVAL : 0; } diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h index 4c5a00c..b6848c3 100644 --- a/arch/x86/kernel/cpu/perf_event.h +++ b/arch/x86/kernel/cpu/perf_event.h @@ -447,6 +447,15 @@ struct x86_pmu { void (*put_event_constraints)(struct cpu_hw_events *cpuc, struct perf_event *event); + + void (*commit_scheduling)(struct cpu_hw_events *cpuc, + struct perf_event *event, + int cntr); + + void (*start_scheduling)(struct cpu_hw_events *cpuc); + + void (*stop_scheduling)(struct cpu_hw_events *cpuc); + struct event_constraint *event_constraints; struct x86_pmu_quirk *quirks; int perfctr_second_write; -- 1.9.1
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