Date: Sat, 6 Aug 2011 09:11:27 +0000 From: Alexander Best <arundel@freebsd.org> To: Yuri <yuri@rawbw.com> Cc: freebsd-hackers@freebsd.org Subject: Re: top(1) loses process user time count when threads end Message-ID: <20110806091127.GA39951@freebsd.org> In-Reply-To: <4E3CC033.6070604@rawbw.com> References: <4E3CC033.6070604@rawbw.com>
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On Fri Aug 5 11, Yuri wrote: > I have the process that first runs in 3 threads but later two active > threads exit. > > top(1) shows this moment this way (1 sec intervals): > 30833 yuri 3 76 0 4729M 4225M nanslp 4 0:32 88.62% app > 30833 yuri 3 76 0 4729M 4225M nanslp 6 0:34 90.92% app > 30833 yuri 1 96 0 4729M 4225M CPU1 1 0:03 1.17% app > 30833 yuri 1 98 0 4729M 4226M CPU1 1 0:04 12.89% app > > Process time goes down: 0:34 -> 0:03. Also WCPU goes down 90.92% -> > 1.17% even though this process is CPU bound and does intense things > right after threads exit. > > getrusage(2) though, called in the process, shows the correct user time. > > I think this is the major bug in the process time accounting. could you check, whether kern/128177 or kern/140892 describe your situation? cheers. alex > > 8.2-STABLE > > Yuri
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