Messages in this thread | | | Date | Tue, 25 Jun 2002 06:58:37 -0400 | Subject | Re: [PATCH] (1/2) reverse mapping VM for 2.5.23 (rmap-13b) | From | rwhron@earthlin ... |
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> Maybe Randy Hron (added to Cc) can find some spare time > to benchmark these sometime before the summit too[1].
dbench isn't scaling as well with the -rmap13b patch. With 128 processes, dbench throughput is less than 1/3 of mainline.
dbench ext2 32 processes Average High Low 2.5.24 28.24 28.84 27.30 mb/sec 2.5.24-rmap13b 21.64 23.50 19.71
dbench ext2 128 processes Average High Low 2.5.24 19.32 21.05 18.05 2.5.24-rmap13b 5.34 5.38 5.30
tiobench: Sequential reads, rmap had about 10% more throughput and lower max latency. For random reads, throughput was lower and max latency was higher with rmap.
Lmbench: Most metrics look better with rmap. Exceptions are fork/exec latency and mmap latency. mmap latency was 18% higher with rmap.
Autoconf build (fork test) was about 5% faster without rmap.
Details at: http://home.earthlink.net/~rwhron/kernel/latest.html
-- Randy Hron
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