Messages in this thread | | | From | Chris Morgan <> | Subject | Re: 2.5.XX very sluggish | Date | Tue, 15 Jul 2003 22:32:59 -0400 |
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I see the same behavior with 2.6.0 test1. I can't imagine I'm the only person seeing this issue, anything else I can do to help with debugging?
Chris
On Sunday 13 July 2003 11:21 pm, Chris Morgan wrote: > Under 2.4.21: > > For my boot drive, ide: > > /dev/hdc2: > multcount = 16 (on) > IO_support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 1 (on) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 8 (on) > geometry = 2100/255/63, sectors = 32740470, start = 996030 > > For the scsi drives(2 drives in a raid 1 setup): > /dev/sda: > readonly = 0 (off) > geometry = 17885/255/63, sectors = 287332384, start = 0 > > And some performance numbers, maybe these are helpful: > > /dev/md1: > Timing buffer-cache reads: 128 MB in 0.60 seconds =213.33 MB/sec > Timing buffered disk reads: 64 MB in 2.22 seconds = 28.83 MB/sec > > /dev/hdc: > Timing buffer-cache reads: 128 MB in 0.56 seconds =228.57 MB/sec > Timing buffered disk reads: 64 MB in 4.33 seconds = 14.78 MB/sec > > > > Under 2.5.75: > > /dev/hdc: > multcount = 16 (on) > IO_support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 1 (on) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 256 (on) > geometry = 33483/16/63, sectors = 33750864, start = 0 > > These are with X running: > > /dev/hdc: > Timing buffer-cache reads: 128 MB in 30.58 seconds = 4.19 MB/sec > Timing buffered disk reads: 64 MB in 20.98 seconds = 3.05 MB/sec > Hmm.. suspicious results: probably not enough free memory for a proper > test. > > /dev/md1: > Timing buffer-cache reads: 128 MB in 108.76 seconds = 1.18 MB/sec > Timing buffered disk reads: 64 MB in 44.86 seconds = 1.43 MB/sec > Hmm.. suspicious results: probably not enough free memory for a proper > test. > > With X shutdown: > /dev/hdc: > Timing buffer-cache reads: 128 MB in 11.26 seconds = 11.36 MB/sec > Timing buffered disk reads: 64 MB in 6.88 seconds = 9.30 MB/sec > Hmm.. suspicious results: probably not enough free memory for a proper > test. > > /dev/md1: > Timing buffer-cache reads: 128 MB in 11.88 seconds = 10.77 MB/sec > Timing buffered disk reads: 64 MB in 7.74 seconds = 8.27 MB/sec > Hmm.. suspicious results: probably not enough free memory for a proper > test. > > I'm running xf4.2.1 and the 'nv' driver. > > Any ideas as to what else I can look at? > > Thanks, > Chris > > On Sunday 13 July 2003 12:45 pm, Doug McNaught wrote: > > Chris Morgan <cmorgan@alum.wpi.edu> writes: > > > 1.4Ghz Athlon via 82cxx chipset, software raid 1 scsi drives, currently > > > running 2.4.21 > > > > > > With 2.5.73/74/75(the only ones I've tried thus far) the kernel boots > > > fine until it tries to mount the reiserfs partition on the raid1 set. > > > Replaying the journal takes many times longer than with 2.4. Once it > > > gets past that point the whole machine appears to be quite sluggish. > > > Is this a known issue with reiserfs + software raid 1? What > > > information would be useful to aid in debugging? > > > > What does 'hdparm' say about DMA settings on your drive under 2.5? > > > > -Doug
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