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SubjectRe: [BENCHMARK] ext3, reiser, jfs, xfs effect on contest
On Sat, 1 Feb 2003, Con Kolivas wrote:

>Using the osdl hardware ( with contest
>( I've conducted a set of benchmarks with
>different filesystems. Note that contest does not claim to be a throughput
>All of these use kernel 2.5.59
>First a set of contest benchmarks with the io load on a different hard disk
>containing each of the four filesystems:
>Kernel [runs] Time CPU% Loads LCPU% Ratio
>2559ext3 3 89 84.3 2 5.5 1.13
>2559reiser 3 87 86.2 2 5.7 1.10
>2559jfs 3 87 86.2 3 5.7 1.10
>2559xfs 3 87 86.2 2 4.5 1.10
>I found it interesting that there is virtually no difference in kernel
>compilation time with all fs. However jfs consistently wrote more during the
>io load than the other fs.
>This is a set of benchmarks with the kernel compilation and load all performed
>on each of the fs:

Compilation is inherently CPU bound, not disk I/O bound, so
compiling the kernel (or anything for that matter) isn't going to
show any difference really because the CPU Mhz and L1/L2 cache
are the bottleneck.

Mike A. Harris
OS Systems Engineer - XFree86 maintainer - Red Hat

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