Date: Tue, 23 Dec 1997 13:35:01 +0900 From: Takuya Koumoto <takuya-k@is.aist-nara.ac.jp> To: freebsd-smp@freebsd.org Subject: Mystery on clock. Message-ID: <199712230435.EAA00654@ryo1123.aist-nara.ac.jp>
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Hi, I found a strange behaver on smp system. My system is approximately 12/9 of 3.0-current running on a GA586DX with dual P5-133. % time dd if=/dev/zero of=/dev/null bs=1m count=1000 1000+0 records in 1000+0 records out 1048576000 bytes transferred in 10.211286 secs (102687948 bytes/sec) 9.873u 0.299s 0:10.21 99.5% 60+2218k 0+0io 0pf+0w % time dd if=/dev/zero of=/dev/null bs=10m count=100 100+0 records in 100+0 records out 1048576000 bytes transferred in 1.271951 secs (824383984 bytes/sec) 0.977u 0.309s 0:01.29 98.4% 62+20972k 0+0io 0pf+0w Actually, both consume about 12 seconds, but the case of bs=1m is not a problem. Problem is the case of bs=10m. Is it a known problem? Thanks, Takuya. ---
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