Date: Tue, 9 Mar 2004 10:19:38 -0800 From: Alfred Perlstein <alfred@freebsd.org> To: Doug White <dwhite@gumbysoft.com> Cc: current@freebsd.org Subject: Re: diagnosing interrupt storms? Message-ID: <20040309181938.GP56622@elvis.mu.org> In-Reply-To: <20040309095540.U69332@carver.gumbysoft.com> References: <20040309071912.GM56622@elvis.mu.org> <20040309095540.U69332@carver.gumbysoft.com>
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* Doug White <dwhite@gumbysoft.com> [040309 09:57] wrote: > On Mon, 8 Mar 2004, Alfred Perlstein wrote: > > > At a certain point after booting my SMP 5-current box gets all > > weird, typically I see 50%+ time spent in interrupt. If I run "top > > -S" I typically see one of the ithreads using 50% cpu. > > > > I'm trying to figure out what it's doing, what has gone wrong etc. > > > > Are there any sysctls to look at or things I can do to diagnose > > this? > > vmstat -i is useful for figuring out exactly which interrupt is storming, > although the ithread might hint it too. > > Which one is it? It's typically been em (intel gigE) or the sound interrupt. -- - Alfred Perlstein - Research Engineering Development Inc. - email: bright@mu.org cell: 408-480-4684
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