[RFC PATCH 3/4] perf/core: Split up pinned and non pinned processing

[Frederic Weisbecker]

Split up pinned and non-pinned events processing in two helpers
so that it's more flexible to handle them seperately.

Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 kernel/perf_event.c |   51 +++++++++++++++++++++++++++++++++++----------------
 1 files changed, 35 insertions(+), 16 deletions(-)

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 0432c1c..50f2997 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1246,25 +1246,11 @@ static void perf_event_cpu_sched_out(struct perf_cpu_context *cpuctx)
 }
 
 static void
-__perf_event_sched_in(struct perf_event_context *ctx,
-			struct perf_cpu_context *cpuctx, int cpu)
+__perf_event_sched_in_pinned(struct perf_event_context *ctx,
+			     struct perf_cpu_context *cpuctx, int cpu)
 {
 	struct perf_event *event;
-	int can_add_hw = 1;
-
-	spin_lock(&ctx->lock);
-	ctx->is_active = 1;
-	if (likely(!ctx->nr_events))
-		goto out;
-
-	ctx->timestamp = perf_clock();
-
-	perf_disable();
 
-	/*
-	 * First go through the list and put on any pinned groups
-	 * in order to give them the best chance of going on.
-	 */
 	list_for_each_entry(event, &ctx->pinned_grp_list, group_entry) {
 		if (event->state <= PERF_EVENT_STATE_OFF)
 			continue;
@@ -1283,6 +1269,14 @@ __perf_event_sched_in(struct perf_event_context *ctx,
 			event->state = PERF_EVENT_STATE_ERROR;
 		}
 	}
+}
+
+static void
+__perf_event_sched_in_volatile(struct perf_event_context *ctx,
+			       struct perf_cpu_context *cpuctx, int cpu)
+{
+	int can_add_hw = 1;
+	struct perf_event *event;
 
 	list_for_each_entry(event, &ctx->volatile_grp_list, group_entry) {
 		/*
@@ -1303,6 +1297,31 @@ __perf_event_sched_in(struct perf_event_context *ctx,
 			if (group_sched_in(event, cpuctx, ctx, cpu))
 				can_add_hw = 0;
 	}
+}
+
+static void
+__perf_event_sched_in(struct perf_event_context *ctx,
+			struct perf_cpu_context *cpuctx, int cpu)
+{
+	spin_lock(&ctx->lock);
+	ctx->is_active = 1;
+	if (likely(!ctx->nr_events))
+		goto out;
+
+	ctx->timestamp = perf_clock();
+
+	perf_disable();
+
+	/*
+	 * First go through the list and put on any pinned groups
+	 * in order to give them the best chance of going on.
+	 */
+	__perf_event_sched_in_pinned(ctx, cpuctx, cpu);
+
+	/* Then handle the non-pinned groups */
+	__perf_event_sched_in_volatile(ctx, cpuctx, cpu);
+
+
 	perf_enable();
  out:
 	spin_unlock(&ctx->lock);
-- 
1.6.2.3

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