Date: Fri, 3 Jul 2009 02:04:50 +0200 From: Max Laier <max@love2party.net> To: freebsd-current@freebsd.org Cc: Rafal Jaworowski <raj@semihalf.com>, Jeff Roberson <jroberson@jroberson.net> Subject: Re: MD5 test slowdown Message-ID: <200907030204.51415.max@love2party.net> In-Reply-To: <CCF0CF9D-BD46-4D85-9B99-BE6B54281899@semihalf.com> References: <CCF0CF9D-BD46-4D85-9B99-BE6B54281899@semihalf.com>
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On Thursday 02 July 2009 13:32:08 Rafal Jaworowski wrote: > I'm observing some heavy slowdown seen with md5 test on PowerPC: > > 1. On the MPC8572 machine with today's HEAD I'm getting: > > # md5 -t > MD5 time trial. Digesting 100000 10000-byte blocks ... done > Digest = 766a2bb5d24bddae466c572bcabca3ee > Time = 36.930565 seconds > Speed = 27077842.000000 bytes/second > > 2. While a couple of months back it yielded 6x shorter times on this > very same hardware, like this one: > > # md5 -t > MD5 time trial. Digesting 100000 10000-byte blocks ... done > Digest = 766a2bb5d24bddae466c572bcabca3ee > Time = 6.027277 seconds > Speed = 165912400.000000 bytes/second > > Timers work fine, the slowdown is real. I don't know if this is > PowerPC related, and was wondering if anybody observed something > similar on other archs perhaps? Any suggestions what could be causing > this or where to look? I cannot see immediate suspects in the arch/ > platform code. "signifanctly slowdown of FreeBSD 8.0-CURRENT/amd64" to this mailing list reports something that might be related. It seems there is a patch available, but not committed yet. Though I'm not sure about the nature of the problem exactly. Jeff? -- /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News
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