Messages in this thread | | | Subject | choice of raid5 checksumming algorithm wrong ? | From | Soeren Sonnenburg <> | Date | 11 Jan 2003 07:26:45 +0100 |
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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.
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