Messages in this thread | | | Date | Sat, 13 Nov 1999 16:15:47 +0100 | From | Manfred Spraul <> | Subject | Re: [Patch] shm bug introduced with pagecache in 2.3.11 |
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Alan Cox wrote: > So you benchmarked with a very slow I/O device. > > Linux FAT performance is slow. Try NTFS (or FAT) versus ext2. That would > be interesting.
Ok, I switched to a Seagate ST34520N (7200 rpm, scsi2 narrow, 4.5 GB), and I added a new test: Linux-multi-thread vs Linux-multi-process. The results are as I expected:
-Linux-multi-process is more or less on par with NT. The 20% difference could be the thread/process overhead. -Linux-multi-thread is sloww.
450000 pages test file, ext2 and NTFS, 128 MB ram, Sym810 controller, AMD K6/200
# is the number of threads/processes which are running.
# Linux-threads Linux-processes NT (threads) 1 51 51 60 16 51 67 96 64 50 73 105 128 48 75 107
The modified source code is at http://colorfullife.com/~manfreds/pagein/pagein.cpp
-- Manfred
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