Messages in this thread |  | | Date | Fri, 19 Oct 2001 19:53:28 +0400 | From | Dmitry Volkoff <> | Subject | Re: problems with I/O performance with 2.4.12-ac3 |
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Hi, On my machine HDD is slow with all ac-kernels I've tried so far. There is even more simple test -- hdparm.
2.4.12-ac3: # hdparm -tT /dev/hda /dev/hda: Timing buffer-cache reads: 128 MB in 0.70 seconds =182.86 MB/sec Timing buffered disk reads: 64 MB in 2.88 seconds = 22.22 MB/sec
2.4.13-pre3: # hdparm -tT /dev/hda /dev/hda Timing buffer-cache reads: 128 MB in 0.63 seconds =203.00 MB/sec Timing buffered disk reads: 64 MB in 1.57 seconds = 40.76 MB/sec
Same config options in both kernels. Same hardware.
# hdparm /dev/hda /dev/hda: multcount = 16 (on) I/O support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 1 (on) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 4865/255/63, sectors = 78165360, start = 0
This is on Athlon-1.4Ghz, chipset amd761/via8231, IDE Seagate Barracuda ATA-IV ST340016A 40G. Can somebody explain such results?
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