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Message-Id: <20060907175323.57a5c6b0.akpm@osdl.org> Date: Thu, 7 Sep 2006 17:53:23 -0700 From: Andrew Morton <akpm@...l.org> To: "Metathronius Galabant" <m.galabant@...glemail.com> Cc: linux-kernel@...r.kernel.org Subject: Re: top displaying 50% si time and 50% idle on idle machine On Thu, 7 Sep 2006 20:08:53 +0200 "Metathronius Galabant" <m.galabant@...glemail.com> wrote: > Hi, > > Kernel 2.6.17.11 with tg3 network driver, NAPI enabled (Distro CentOS 4.4). > top shows strangely 50% idle even if the machine is _completely_ idle. > > top - 01:04:30 up 4 days, 12:05, 2 users, load average: 0.00, 0.00, 0.00 > Tasks: 34 total, 2 running, 32 sleeping, 0 stopped, 0 zombie > Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 50.0% id, 0.0% wa, 0.0% hi, 50.0% si > Mem: 3634452k total, 313284k used, 3321168k free, 71308k buffers > Swap: 505896k total, 0k used, 505896k free, 220272k cached > > I find this pretty alarming - can somebody please enlighten me? > Please include me on CC. Do `ps aux', look for a process stuck in D state. Do echo t > /proc/sysrq-trigger dmesg -s 1000000 > foo then edit foo, search for the process in D state (look for " D ") and send that process's backtrace record. Thanks. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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