From: Ingo Molnar <mingo@elte.hu>
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: npiggin@suse.de, linux-kernel@vger.kernel.org, akpm@linux-foundation.org
Subject: Re: [patch] sched: introduce SD_BALANCE_FORK for ht/mc/smp domains
Date: Sun, 29 Jul 2007 23:16:44 +0200 [thread overview]
Message-ID: <20070729211644.GC6808@elte.hu> (raw)
In-Reply-To: <20070726223455.GK3318@linux-os.sc.intel.com>
* Siddha, Suresh B <suresh.b.siddha@intel.com> wrote:
> They might be doing more exec's and probably covered by exec balance.
>
> There was a small pthread test case which was calculating the time to
> create all the threads and how much time each thread took to start
> running. It appeared as if the threads ran sequentially one after
> another on a DP system with four cores leading to this SD_BALANCE_FORK
> observation.
would be nice to dig out that testcase i suspect and quantify the
benefits of your patch. Another workload which might perform better
would be linpack: it benefits from fast and immediate 'spreading' of
freshly forked threads.
Ingo
next prev parent reply other threads:[~2007-07-29 21:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-26 18:32 [patch] sched: introduce SD_BALANCE_FORK for ht/mc/smp domains Siddha, Suresh B
2007-07-26 22:18 ` Ingo Molnar
2007-07-26 22:34 ` Siddha, Suresh B
2007-07-27 1:22 ` Nick Piggin
2007-07-27 19:09 ` Siddha, Suresh B
2007-07-29 21:16 ` Ingo Molnar [this message]
2007-07-30 17:53 ` Siddha, Suresh B
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