Date: Sun, 9 Dec 2007 03:24:16 +0300 From: Stanislav Sedov <stas@freebsd.org> To: Philipp Wuensche <cryx-freebsd@h3q.com> Cc: Adrian Chadd <adrian@freebsd.org>, "freebsd-performance@freebsd.org" <freebsd-performance@freebsd.org> Subject: Re: tuning for high connection rates Message-ID: <20071209002416.GD2044@dracon.ht-systems.ru> In-Reply-To: <4756BDC1.2070802@h3q.com> References: <4755ED57.6030603@h3q.com> <20071204195131.56cb1307.wmoran@collaborativefusion.com> <4755FAD8.5030805@h3q.com> <d763ac660712041833m259e35f4kaf1d8aedade22760@mail.gmail.com> <4756BDC1.2070802@h3q.com>
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On Wed, Dec 05, 2007 at 04:03:29PM +0100 Philipp Wuensche mentioned: > Adrian Chadd wrote: > > On 05/12/2007, Philipp Wuensche <cryx-freebsd@h3q.com> wrote: > > > >> As I understand it, and correct me if I'm wrong, polling helps against > >> high interrupt rates but for that intel gigabit cards have interrupt > >> moderation. We don't have a problem with interrupts (20% CPU) at the > >> moment but with system (100% CPU) as you can see in the system > >> monitoring graphs. Interrupts sometimes peak at, but usually are under, > >> the 2k interrupts/sec limit. > > > > Begin by reading up on the hardware profiling support (hwpmc, pmc, > > etc) and see if you can get some system and process-specific profiling > > information. > > Oh interesting stuff, I definitely have to take a look into that. Nice. > You can find a good tutorial on hwpmc by Robert Watson here: http://lists.freebsd.org/pipermail/freebsd-current/2006-February/061096.html -- Stanislav Sedov ST4096-RIPE
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