Re: [PerfSuite-users] threshold

[Ryszard J. <rys...@ce...>]

Hello Rick,

Thank you for your last email.

> Hmmm!  This is good news although I am at a loss as to why there might be 
> a difference depending on the filesystem in use.  Nevertheless, I am glad 
> to hear that things are apparently working.  In your opinion, is this 
> something that warrants inclusion in the BUGS file that is included in the 
> PerfSuite distribution?  If so, I'd be happy to include in the hopes that 
> it might save someone else a little detective work.

I think that it could be a good idea to mention about this problem in the 
BUGS file. When I had changed a running directory from an AFS into a local 
directory all my problems with threshold has dissappeared.

> One thing I have seen before that sounds related is a difference in 
> executable/library locations between the computer system on which the 
> simulation is run versus the system on which the post-processing 
> (psprocess) occurs.  What happened in that case is that the "<module>" 
> element in the profiling XML output identified the location of the library 
> through the "file" attribute in the context of runtime.  For example, 
> instead of listing:
>
>   <module file="/usr/lib/libsomething.so.0" offset="a5e000">
>
> it had:
>
>   <module file="/mnt/nfs/usr/lib/libsomething.so.0" offset="a5e000">
>
> The result was that psprocess could not find the library as listed in the 
> XML document and would not report any samples for that module.  The only 
> workaround in this case was to correct the entries (using a text editor) 
> before running psprocess.

I usually do the profiling job and the post-processing on the same machine 
with the same set of environment variables, just one after another, so it 
should work okay.
But I have other question about libraries. If our program is linked against 
some libraries, and these libraries are linked against others, will psrun 
and psprocess report these all libraries? I have asked this question, 
becasuse I still see question marks even using less complicated examples 
than a full simulation.

Regards,

Ryszard.