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authorFrederic Weisbecker <fweisbec@gmail.com>2015-07-16 17:42:29 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2016-03-02 16:43:00 +0100
commit555e0c1ef7ff49ee5ac3a1eb12de4a2e4722f63d (patch)
treeede085fe6a092b648768057d988f3f11ae864d1e /kernel/sched/rt.c
parente6e6cc22e067a6f44449aa8fd0328404079c3ba5 (diff)
perf: Migrate perf to use new tick dependency mask model
Instead of providing asynchronous checks for the nohz subsystem to verify perf event tick dependency, migrate perf to the new mask. Perf needs the tick for two situations: 1) Freq events. We could set the tick dependency when those are installed on a CPU context. But setting a global dependency on top of the global freq events accounting is much easier. If people want that to be optimized, we can still refine that on the per-CPU tick dependency level. This patch dooesn't change the current behaviour anyway. 2) Throttled events: this is a per-cpu dependency. Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christoph Lameter <cl@linux.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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