On Mon, Apr 08, 2019 at 10:32:51AM -0700, Stephane Eranian wrote: > This patch add perf_ctx_resched() a global function that can be called > to force rescheduling of events based on event types. The function locks > both cpuctx and task_ctx internally. This will be used by a subsequent patch.
I took out the task_ctx and event_type arguments. --- Subject: perf/core: Add perf_ctx_resched() as global function From: Stephane Eranian <[email protected]> Date: Mon, 8 Apr 2019 10:32:51 -0700 This patch add perf_ctx_resched() a global function that can be called to force rescheduling of events. The function locks both cpuctx and task_ctx internally. This will be used by a subsequent patch. Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Stephane Eranian <[email protected]> [peterz: simplified calling convention] Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- include/linux/perf_event.h | 3 +++ kernel/events/core.c | 9 +++++++++ 2 files changed, 12 insertions(+) --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -888,6 +888,9 @@ extern void perf_sched_cb_dec(struct pmu extern void perf_sched_cb_inc(struct pmu *pmu); extern int perf_event_task_disable(void); extern int perf_event_task_enable(void); + +extern void perf_ctx_resched(struct perf_cpu_context *cpuctx); + extern int perf_event_refresh(struct perf_event *event, int refresh); extern void perf_event_update_userpage(struct perf_event *event); extern int perf_event_release_kernel(struct perf_event *event); --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2478,6 +2478,15 @@ static void ctx_resched(struct perf_cpu_ perf_pmu_enable(cpuctx->ctx.pmu); } +void perf_ctx_resched(struct perf_cpu_context *cpuctx) +{ + struct perf_event_context *task_ctx = cpuctx->task_ctx; + + perf_ctx_lock(cpuctx, task_ctx); + ctx_resched(cpuctx, task_ctx, EVENT_ALL|EVENT_CPU); + perf_ctx_unlock(cpuctx, task_ctx); +} + /* * Cross CPU call to install and enable a performance event *
