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Groups > linux.kernel > #1342267

[PATCH 04/12] perf: Only update context time when active

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Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 kernel/events/core.c |   18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2170,12 +2170,12 @@ perf_install_in_context(struct perf_even
 		raw_spin_unlock_irq(&ctx->lock);
 		return;
 	}
-	update_context_time(ctx);
-	/*
-	 * Update cgrp time only if current cgrp matches event->cgrp.
-	 * Must be done before calling add_event_to_ctx().
-	 */
-	update_cgrp_time_from_event(event);
+
+	if (ctx->is_active) {
+		update_context_time(ctx);
+		update_cgrp_time_from_event(event);
+	}
+
 	add_event_to_ctx(event, ctx);
 	raw_spin_unlock_irq(&ctx->lock);
 

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[PATCH 04/12] perf: Only update context time when active Peter Zijlstra <peterz@infradead.org> - 2016-02-24 19:00 +0100
  [tip:perf/urgent] perf: Only update context time when active tip-bot for Peter Zijlstra <tipbot@zytor.com> - 2016-02-25 09:10 +0100

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