From: Andrew Morton <akpm@osdl.org>
To: "Metathronius Galabant" <m.galabant@googlemail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: top displaying 50% si time and 50% idle on idle machine
Date: Thu, 7 Sep 2006 17:53:23 -0700 [thread overview]
Message-ID: <20060907175323.57a5c6b0.akpm@osdl.org> (raw)
In-Reply-To: <1b270aae0609071108h22bc10b0v5d2227abfc66c53c@mail.gmail.com>
On Thu, 7 Sep 2006 20:08:53 +0200
"Metathronius Galabant" <m.galabant@googlemail.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.
next prev parent reply other threads:[~2006-09-08 0:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-07 18:08 Metathronius Galabant
2006-09-08 0:53 ` Andrew Morton [this message]
2006-09-08 21:03 ` Metathronius Galabant
2006-09-08 22:47 ` Pavel Machek
2006-09-11 11:05 ` Metathronius Galabant
2006-09-11 11:49 ` Metathronius Galabant
2006-09-11 12:32 ` Vitezslav Samel
-- strict thread matches above, loose matches on Subject: below --
2006-09-07 18:04 Metathronius Galabant
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