Commit-ID: c5362c0c376486afcf3c91d3c2691d348ac1e2fd
Gitweb: http://git.kernel.org/tip/c5362c0c376486afcf3c91d3c2691d348ac1e2fd
Author: Maria Dimakopoulou <maria.n.dimakopoulou@xxxxxxxxx>
AuthorDate: Mon, 17 Nov 2014 20:06:55 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 2 Apr 2015 17:33:09 +0200
perf/x86: Add 3 new scheduling callbacks
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.
Signed-off-by: Maria Dimakopoulou <maria.n.dimakopoulou@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: bp@xxxxxxxxx
Cc: jolsa@xxxxxxxxxx
Cc: kan.liang@xxxxxxxxx
Link: http://lkml.kernel.org/r/1416251225-17721-4-git-send-email-eranian@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
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 682ef00..cd61158 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -784,6 +784,9 @@ 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]);
@@ -830,6 +833,8 @@ 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]);
}
}
/*
@@ -850,6 +855,10 @@ 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 55b9155..ea27e63 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -460,6 +460,15 @@ 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;
--
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