Date: Sat, 30 May 2009 18:51:59 +0200 From: Attilio Rao <attilio@freebsd.org> To: "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de> Cc: freebsd-current@freebsd.org Subject: Re: signifanctly slowdown of FreeBSD 8.0-CURRENT/amd64 Message-ID: <3bbf2fe10905300951o3beea201j72b6e6b96f85c05a@mail.gmail.com> In-Reply-To: <3bbf2fe10905300944r96ae931re4475c78d9be3aa8@mail.gmail.com> References: <4A2120D5.50300@mail.zedat.fu-berlin.de> <3bbf2fe10905300848s6342a7b1l32340baee8e7e8f1@mail.gmail.com> <4A215D7F.7020807@mail.zedat.fu-berlin.de> <3bbf2fe10905300944r96ae931re4475c78d9be3aa8@mail.gmail.com>
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2009/5/30 Attilio Rao <attilio@freebsd.org>: > 2009/5/30 O. Hartmann <ohartman@mail.zedat.fu-berlin.de>: >> Attilio Rao wrote: >>> 2009/5/30 O. Hartmann <ohartman@mail.zedat.fu-berlin.de>: >>> >>>> Hello. >>>> I realized a significant slowdown of FreeBSD 8.0-CURRENT/amd64 on every >>>> box I run. I have the most recent FreeBSD 8.0-CURRENT/amd64 with custom >>>> kernel and switched off every debugging. I see a drastic slowdown >>>> whenever heavy I/O on UFS2 and ZFS partitions is performed and whenever >>>> some compilation is done (compiling world and kernel). This is horrible >>>> on a single core Athlon64 CPU with 2GB RAM as well as on a 4 core Q6600 >>>> with 8GB and a server with 2 x 4-cores and 16GB RAM. >>>> >>>> I can not say clearly whether I/O is the bottleneck. Maybe something >>>> with the memory subsystem, when it comes to compiler runs, when no disk >>>> I/O is done but the box is still horrible slow. This behaviour occured >>>> several weeks ago, not being able to specify it more precisely. >>>> >>>> AQre there any issues at the moment? >>>> >>> >>> Your kernel is compiled from which date? >>> >>> Thanks, >>> Attilio >>> >>> >>> >> Most recent, say: yesterday! As well as world. > > Can you try to revert only r193011 and see if something changes? Also, did you compile the single-core athlon64 without the option SMP? Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein
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