Date: Sun, 30 Dec 2007 14:31:07 +0100 From: Kris Kennaway <kris@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: <47779D9B.7050402@FreeBSD.org> 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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Philipp Wuensche wrote: > 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. Did you make progress on this? I'd like to see a profiling trace from hwpmc, and also from LOCK_PROFILING. Kris
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