From: Ingo Molnar <mingo@elte.hu>
To: "Perez-Gonzalez, Inaky" <inaky.perez-gonzalez@intel.com>
Cc: linux-kernel@vger.kernel.org, robustmutexes@lists.osdl.org,
Andrew Morton <akpm@osdl.org>,
Ulrich Drepper <drepper@redhat.com>
Subject: Re: PATCH futex on fusyn (Was: RE: [RFC/PATCH] FUSYN Realtime & robust mutexes for Linux, v2.3.1)
Date: Thu, 19 Aug 2004 08:57:25 +0200 [thread overview]
Message-ID: <20040819065725.GA29785@elte.hu> (raw)
In-Reply-To: <F989B1573A3A644BAB3920FBECA4D25A011F9422@orsmsx407>
* Perez-Gonzalez, Inaky <inaky.perez-gonzalez@intel.com> wrote:
> Performance:
> Environment Seconds (10 continuous runs averaged)
> ----------- -------------------
> plain NPTL and futexes 0.97
> plain NPTL, futexes use fuqueues 1.15
> Under RTNPTL, using fulocks 1.48
hm, nice - only ~18% slowdown for a very locking-intense workload. If
that could be made somewhat lower (without bad compromises) it would
kill most of the performance-based objections.
the RTNPTL overhead (+~30%) is to be expected i guess - but it's
optional so no pain.
Ingo
next prev parent reply other threads:[~2004-08-19 6:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-19 2:07 PATCH futex on fusyn (Was: RE: [RFC/PATCH] FUSYN Realtime & robust mutexes for Linux, v2.3.1) Perez-Gonzalez, Inaky
2004-08-19 6:57 ` Ingo Molnar [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-08-20 2:15 Perez-Gonzalez, Inaky
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