Messages in this thread | | | Date | Fri, 16 Apr 1999 21:46:09 +0200 (MEST) | From | Walter Hofmann <> | Subject | Re: Solaris tmpfs vs. Linux RAMdisk |
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On Thu, 15 Apr 1999 owner-linux-kernel-digest@vger.rutgers.edu wrote:
> PS: There is a bug in the benchmark program I posted yesterday. It should be > using the tv_usec field to calculate microseconds instead of the tv_sec > field. I reran the tests with this fix in and it does not make a > significant difference in the results.
I get the following results:
wh@frodo:~ > ./test /home/wh Did 14137 loops in 2.99 seconds (4724.35 loops/sec) wh@frodo:~ > ./test /tmp Did 15923 loops in 2.99 seconds (5322.36 loops/sec) wh@frodo:~ > ./test /usr/local/tmp Did 28783 loops in 3.00 seconds (9596.10 loops/sec)
/home and /tmp are on the same ext2 partition (486M, 84% filled) /usr is an (soft-)raid0 array (4G, 81% filled, 2 disks)
There is virtually no disk access during the test, the results are stable over many runs.
Yet there is one big question: Why is the raid0-array twice as fast when there is no disk access???
Walter
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