From: Soeren Sonnenburg <kernel@nn7.de>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: choice of raid5 checksumming algorithm wrong ?
Date: 11 Jan 2003 07:26:45 +0100 [thread overview]
Message-ID: <1042266405.14440.54.camel@sun> (raw)
Hi!
I really do wonder whether the displayed message is wrong or why it
always chooses the slowest checksumming function (happens with 2.4.19 -
21pre3)
2.4.20:
Jan 7 18:32:22 sun kernel: raid5: measuring checksumming speed
Jan 7 18:32:22 sun kernel: 8regs : 3054.400 MB/sec
Jan 7 18:32:22 sun kernel: 32regs : 2696.800 MB/sec
Jan 7 18:32:22 sun kernel: pIII_sse : 1614.000 MB/sec
Jan 7 18:32:22 sun kernel: pII_mmx : 4672.000 MB/sec
Jan 7 18:32:22 sun kernel: p5_mmx : 5984.000 MB/sec
Jan 7 18:32:22 sun kernel: raid5: using function: pIII_sse (1614.000 MB/sec)
21pre2:
Jan 5 19:18:47 sun kernel: raid5: measuring checksumming speed
Jan 5 19:18:47 sun kernel: 8regs : 3054.000 MB/sec
Jan 5 19:18:47 sun kernel: 32regs : 2697.200 MB/sec
Jan 5 19:18:47 sun kernel: pIII_sse : 2574.000 MB/sec
Jan 5 19:18:47 sun kernel: pII_mmx : 4671.600 MB/sec
Jan 5 19:18:47 sun kernel: p5_mmx : 5984.000 MB/sec
Jan 5 19:18:47 sun kernel: raid5: using function: pIII_sse (2574.000 MB/sec)
Jan 5 19:18:47 sun kernel: md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
21pre3:
Jan 7 21:38:12 sun kernel: raid5: measuring checksumming speed
Jan 7 21:38:12 sun kernel: 8regs : 3055.200 MB/sec
Jan 7 21:38:12 sun kernel: 32regs : 2697.200 MB/sec
Jan 7 21:38:12 sun kernel: pIII_sse : 5658.400 MB/sec
Jan 7 21:38:12 sun kernel: pII_mmx : 4672.400 MB/sec
Jan 7 21:38:12 sun kernel: p5_mmx : 5984.800 MB/sec
Jan 7 21:38:12 sun kernel: raid5: using function: pIII_sse (5658.400 MB/sec)
it is always the same system...athlon xp2.4+...
Soeren.
next reply other threads:[~2003-01-11 6:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-11 6:26 Soeren Sonnenburg [this message]
2003-01-11 15:45 ` choice of raid5 checksumming algorithm wrong ? Lionel Bouton
2003-01-11 19:39 ` Rene Rebe
2003-01-11 19:52 ` Soeren Sonnenburg
2003-01-11 20:20 ` Rene Rebe
2003-01-12 14:44 ` Mr. James W. Laferriere
2003-01-12 16:14 ` Rene Rebe
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