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Re: issue 2043 profiling data

From: Erik Huelsmann <e.huelsmann_at_gmx.net>
Date: 2004-09-06 07:36:24 CEST

> >There is one problem though: The program ran for about 4 hours, but the
> >gprof table seems to suggest that only 328.51 seconds elapsed in
> >look_up_committable (which is 93% of all time elapsed).
> >
> >Can someone help me explain the data above and the relation with the
> 'time'
> >output which gives 229minutes?
> >
> >
> I think gprof will show CPU time, while most of the wall clock time is
> blocking in I/O. 'time' should actually tell you user, system and wall
> clock time; which of them is 229 minutes?

From another run I got this:

real 238m51.263s
user 226m19.327s
sys 2m3.196s

So real and user are not that far apart. Do you mean that real is wall-clock
and user is processor time? Tobias was trying to convince me the problem was
with swapping and waiting for the I/O, but if you are correct, then swapping
will not be the cause of this long execution time.



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Received on Mon Sep 6 07:36:50 2004

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