Messages in this thread Patch in this message | | | From | Alex Shi <> | Subject | [PATCH 3/4] cpuidle/menu: stop seeking deeper idle if current state is too deep | Date | Fri, 19 Aug 2016 16:25:13 +0800 |
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The obsolete commit 71abbbf85 want to introduce a dynamic cstates, but it was removed for long time. Just left the nonsense deeper cstate checking.
Since all target_residency and exit_latency are going longer in deeper idle state, no needs to waste some cpu cycle on useless seeking.
Signed-off-by: Alex Shi <alex.shi@linaro.org> To: linux-kernel@vger.kernel.org Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Alex Shi <alex.shi@linaro.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Rik van Riel <riel@redhat.com> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> --- drivers/cpuidle/governors/menu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index 03d38c2..bb58e2a 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -358,9 +358,9 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev) if (s->disabled || su->disable) continue; if (s->target_residency > data->predicted_us) - continue; + break; if (s->exit_latency > latency_req) - continue; + break; data->last_state_idx = i; } -- 2.8.1.101.g72d917a
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