Re: [PerfSuite-users] psrun profile doesn't show any sampling point

[Rick K. <rk...@il...>]

Cheng,

Well, I think the versioning number explains the negative sample count.  
Version 0.6.2a6 dates from 2006, and the fix I mentioned earlier was 
checked in in September 2007, so you would need a release later than 
that to pick up the fix (but the overflow issue would still be present).

I am not sure what to make of the change of the offset to libc, the 
offset is computed from what is present in the load map for the 
process.  I will think about it, and if I have any insight will follow up.

Rick

Cheng Liao wrote:
> Rick,
>  
> Here is my 'psinv -V' output for the particular machine on which I am 
> seeing the negative numbers of
> sampling points.
>  
> [cliao@maui1 bin]$ psinv -V
>         --------------------------------------------
>                        PerfSuite 0.6.2a6
>                           psinv 0.6
>                   University of Illinois/NCSA
>                       Open Source License
>                 http://perfsuite.ncsa.uiuc.edu/
>                http://perfsuite.sourceforge.net/
>         --------------------------------------------
> I also have PerfSuite 0.6.2 installed on different machines, but 
> haven't run any large job on those machines yet.
>  
> To track down the incorrect libc offset on Linux, I simply pored throu 
> the xml file and ran addr2line manually
> for the samples that were pertinent to the executable to see if I got 
> a lot of ??.  No luck there, but I was able to
> conclude the libc offset should be zero after I did a 'nm libc.so.6' 
> and saw pretty similiar addresses from the nm
> output and the xml file.
>  
> The software company I am working for also has a large PC/Windows 
> customer base...
>  
> Thanks,
> Cheng
>  
>