Messages in this thread | | | Date | Mon, 22 Oct 2001 14:09:35 +0200 | From | Andrea Arcangeli <> | Subject | Re: problems with I/O performance with 2.4.12-ac3 |
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On Fri, Oct 19, 2001 at 07:53:28PM +0400, Dmitry Volkoff wrote: > 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
this should be mostly the blkdev in pagecache and possibly also the vm.
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