Messages in this thread | | | Date | Wed, 17 Dec 2003 13:53:28 -0500 (EST) | From | Rik van Riel <> | Subject | Re: 2.6.0-test9 - poor swap performance on low end machines |
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On Tue, 16 Dec 2003, Roger Luethi wrote:
> One potential problem with the benchmarks is that my test box has > just one bar with 256 MB RAM. The kbuild and efax tests were run with > mem=64M and mem=32M, respectively. If the difference between mem=32M
OK, I found another difference with 2.4.
Try "echo 256 > /proc/sys/vm/min_free_kbytes", I think that should give the same free watermarks that 2.4 has.
Using 1MB as the min free watermark for lowmem is bound to result in more free (and less used) memory on systems with less than 128 MB RAM ... significantly so on smaller systems.
The fact that ZONE_HIGHMEM and ZONE_NORMAL are recycled at very different rates could also be of influence on some performance tests...
-- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan
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