Re: gprof --line taking _forever_

[David Mathog]

> > However, when I try this:
> > 
> >  grpof --line /usr/common/ncbi_new/ncbi/build/blastall
> > 
> > the CPU pegs at 99% and stays there for at least 45 minutes
> > (it's still running as I write this.)
> 
> You didn't mention which version of the binutils you are using.  Also
> relevant is type of debugging information--stabs or DWARF.

Beats me, whatever version 3.3.3 of gcc emits by default with
the command line options -g -pg on a RedHat 7.3 system.

> 
> gprof --line is known to be slow.  There have been various recent
> efforts to speed it up by caching more information.  The speedups have
> been fairly dramatic in some cases.  You may want to try a newer
> version of the binutils to see if it helps.

The old version was 2.11.93.0.2 and it ran somewhere between
70 and 80 minutes (I didn't time it exactly.)  Following your
advice I tried gprof 2.14 and used "time" on that one - it ran in
74m59s. So the newer version doesn't seem to be much (if any) better
than the old one in terms of speed with --line.  I also attempted
to restrict gprof to the function where the most time was spent
with:

 gprof --line --time=BlastWordFinder_mh_contig

but that still ran in 74m19s.

Thanks,

David Mathog
address@hidden
Manager, Sequence Analysis Facility, Biology Division, Caltech