We find that one must use cp and similar utilities (not compilers) to become FS
bound when using a Linux FS (unlike the older Unixes for which compiles were
considered excellent benchmarks).
Hans Reiser wrote:
Hans
>
> Ricardo Galli wrote:
> >
> > Hi,
> > you can find at http://bulma.lug.net/static/ a few new benchmarks among
> > Reiser, XFS and Ext2 (also one with JFS).
> >
> > This time there is a comprehensive Hans' Mongo benchmarks
> > (http://bulma.lug.net/static/mongo/ )and a couple of kernel compilations and
> > read/write/fsync operations tests (I was very careful of populating the
> > cache before the measures for the last two cases).
> >
> > Regards,
> >
> > --ricardo
> > http://m3d.uib.es/~gallir/
>
> These are interesting benchmarks, my only caveats are that make bzImage is
> probably CPU bound not IO bound (the traditional value of compiles as FS
> benchmarks does not apply to Linux filesystems, as they don't do the misdesigned
> synchronization policy of older Unices, and compiles are CPU bound for them in
> my experience), that I don't understand fully why we are so much faster at the
> cp -ar, and I would like Yura to try to reproduce the cp -ar as it seems too
> good to be true.
>
> Thanks for investing the time into this Ricardo.
>
> Hans
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