[PATCH 1/2] cgroup: Set CGRP_RELEASABLE when adding to a cgroup
mbohan at codeaurora.org
Thu Jan 27 17:48:01 PST 2011
On 1/27/2011 5:30 PM, Paul Menage wrote:
> On Thu, Jan 27, 2011 at 5:17 PM, Bryan Huntsman<bryanh at codeaurora.org> wrote:
>> Tested-by: Mike Bohan<mbohan at codeaurora.org>
>> I'm responding on Mike's behalf and adding him to this thread. This
>> patch improves launch time of a test app from ~700ms to ~250ms on MSM,
>> with much lower variance across tests. We also see UI latency
>> improvements, but have not quantified the gains.
> Is this attached to the wrong patch? I'd thought that it was the other
> patch (removing the rcu_synchronize()) that's the performance booster.
> This one is more about preserving the semantics of the notification
You are correct. "[PATCH 2/2] cgroup: Remove call to synchronize_rcu in
cgroup_attach_task" improved the performance.
To be more correct, I tested this patch (eg. "cgroup: Set
CGRP_RELEASABLE when adding to a cgroup") to the degree that it didn't
appear to cause any stability or functional regressions when performing
the simple benchmark procedure described above. I did also test "[PATCH
2/2] cgroup: Remove call to synchronize_rcu in cgroup_attach_task"
independently of this patch to verify that it alone improved the
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
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