LTT can be found at :
http://www.info.polymtl.ca/~karym/trace
Regards.
Raul Miller wrote:
>
> $ time perl -le 'for (1..80000){open FILE, ">$_" or die $!}'
>
> real 26m51.912s
> user 0m3.250s
> sys 26m35.630s
> $
>
> While this was running, X performance sucked.
>
> There's a variety of ways of classifying this problem. Among other
> things we're classifying a compute bound process as i/o bound.
>
> Could someone put this into their suite of stress tests?
>
> * * * * *
>
> By the way, for comparison purposes:
>
> $ time rm -rf t
>
> real 2m9.219s
> user 0m0.340s
> sys 2m7.510s
> $
>
> ("t" was the directory where I created all those files).
>
> And,
>
> $ time perl -le 'use File::Basename; for (1..80000){s-\B-/-g; s/$/f/; $d= dirname $_; -d $d or mkdir $d, 0777; open FILE, ">$_" or die $!}'
>
> real 1m29.630s
> user 0m10.940s
> sys 0m5.100s
> $ cd ..
> $ time rm -rf t
>
> real 0m2.816s
> user 0m0.450s
> sys 0m2.370s
> $
>
> [Plus maybe half a minute of disk activity after a short delay, as all
> those sub-directory entries were cleaned up.]
>
> --
> Raul
>
> -
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-- =================================================== Karim Yaghmour karym@info.polymtl.ca Operating System Consultant (Linux kernel, real-time and distributed systems) ===================================================- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/