Commit-ID: c5362c0c376486afcf3c91d3c2691d348ac1e2fd Gitweb: http://git.kernel.org/tip/c5362c0c376486afcf3c91d3c2691d348ac1e2fd Author: Maria Dimakopoulou <maria.n.dimakopou...@gmail.com> AuthorDate: Mon, 17 Nov 2014 20:06:55 +0100 Committer: Ingo Molnar <mi...@kernel.org> 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.dimakopou...@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Reviewed-by: Stephane Eranian <eran...@google.com> Cc: b...@alien8.de Cc: jo...@redhat.com Cc: kan.li...@intel.com Link: http://lkml.kernel.org/r/1416251225-17721-4-git-send-email-eran...@google.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
