Date: Thu, 2 Jul 2009 13:32:08 +0200 From: Rafal Jaworowski <raj@semihalf.com> To: current@freebsd.org Subject: MD5 test slowdown Message-ID: <CCF0CF9D-BD46-4D85-9B99-BE6B54281899@semihalf.com>
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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. Rafal
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