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Subjectstressing linux
$ 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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