From: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
To: Venki Pallipadi <venki@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul Turner <pjt@google.com>, Ingo Molnar <mingo@elte.hu>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1] sched: fix nohz idle load balancer issues
Date: Wed, 28 Sep 2011 19:57:36 +0530 [thread overview]
Message-ID: <20110928142735.GG8593@linux.vnet.ibm.com> (raw)
In-Reply-To: <20110928141701.GF8593@linux.vnet.ibm.com>
* Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> [2011-09-28 19:47:01]:
> * Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> [2011-09-28 10:04:27]:
>
> > > Especially with higher number of logical CPUs. Likely cleaner way is to clear
> > > first_pick, second_pick on idle instead of clearing on tickless.
> >
> > I think I tried that (cleared first/second_pick_cpu in
> > nohz_kick_needed() upon idle) but didn't get the best results.
which perhaps was beause I was relying on idle_at_tick (which can be
stale information as Suresh pointed out).
- vatsa
prev parent reply other threads:[~2011-09-28 14:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-26 11:50 [PATCH v1] sched: fix nohz idle load balancer issues Srivatsa Vaddagiri
2011-09-26 12:01 ` Srivatsa Vaddagiri
2011-09-27 6:32 ` Ingo Molnar
2011-09-27 10:31 ` Srivatsa Vaddagiri
2011-09-27 13:39 ` Ingo Molnar
2011-09-27 19:53 ` Venki Pallipadi
2011-09-27 23:49 ` Suresh Siddha
2011-09-28 4:15 ` Srivatsa Vaddagiri
2011-09-29 0:47 ` Suresh Siddha
2011-09-29 2:13 ` Srivatsa Vaddagiri
2011-09-29 8:15 ` Peter Zijlstra
2011-09-29 17:13 ` Suresh Siddha
2011-09-28 4:34 ` Srivatsa Vaddagiri
2011-09-28 4:39 ` Srivatsa Vaddagiri
2011-09-28 5:06 ` Srivatsa Vaddagiri
2011-09-28 14:17 ` Srivatsa Vaddagiri
2011-09-28 14:27 ` Srivatsa Vaddagiri [this message]
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