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

[Cheng L. <cyl...@gm...>]

Rick,

The large ?? entry in my profile is caused by an incorrect offset for
libc.so.6 base
address.  I need to manually set the libc offset to zero in the xml file,
then run psprocess, to
fix the problem.

A new problem I have encountered is for large jobs, the bin for the number
of sampling points would overflow:

                                 <sample pc="59d770">27665</sample>
                                <sample pc="59d772">26940</sample>
                                <sample pc="59d776">27564</sample>
                                <sample pc="59d77a">-31502</sample>
<---------- negative
                                <sample pc="59d77e">11502</sample>
                                <sample pc="59d782">5323</sample>
                                <sample pc="59d78a">21065</sample>
                                <sample pc="59d78e">32422</sample>
                                <sample pc="59d790">27709</sample>
                                <sample pc="59d794">-30384</sample>
<------------- negative
                                <sample pc="59d798">24312</sample>
Does perfsuite support a large sampling point bin, or using a higher
profiling overflow threhold would be the only solution?

Thanks,
Cheng

On Wed, Jul 22, 2009 at 5:30 AM, Rick Kufrin <rk...@il...> wrote:

> Cheng,
>
> Thanks for the followup and further info.  I'm glad to hear that you are
> getting better results with the itimer.xml configuration versus profil.xml.
>  I have seen problems with profil.xml before, which uses the C library
> profil() functionality, but they had seemed to be isolated to Itanium
> platforms.  Regardless, this is something we will note and see if we can
> reproduce.
>
> Thanks again for the info - I am copying the SourceForge list for
> archival/status purposes.
>
> Rick
>
> ----- Original Message -----
> From: "Cheng Liao" <cyl...@gm...>
> To: "Rick Kufrin" <rk...@il...>
> Sent: Tuesday, July 21, 2009 11:30:08 PM GMT -06:00 US/Canada Central
> Subject: Re: [PerfSuite-users] psrun profile doesn't show any sampling
> point
>
> Rick,
>
> Thought I would follow up.
>
> Running longer jobs helps, since not all CPU time would be reported by
> profiling
> samples. However, my real problem is I need to use itimer.xml instead of
> profil.xml for psrun. For some reason profil.xml would show empty. Maybe I
> have
> messed up my build somewhere?
>
> Now, everything looks great, except sometime a significant chuck of the
> sampling points cannot find the function names and would show ?? on
> the output.
>
> Thanks again,
> Cheng
>
>
> On Mon, Jul 20, 2009 at 1:28 PM, Cheng Liao < cyl...@gm... > wrote:
>
>
>
> Hi Rick,
>
> Thanks for your quick reply. Indeed the sample output I showed was from a
> Nehalem machine. However, I saw the same problem on some wolfdale and
> harpertown systems too.
>
> So far, I have tried only a 0 second and a 6 second jobs. Will make some
> longer runs.
>
> Cheng
>
>
>
>
>
> On Mon, Jul 20, 2009 at 12:50 PM, Rick Kufrin < rk...@il... >
> wrote:
>
>
> Cheng,
>
> There are two issues that I can think of that you might be experiencing.
> The first is simply that the program may not run long enough to generate
> profiling samples. However, I am also wondering if (based on the processor
> brand string listed in the output) if you are working with an Intel Nehalem
> CPU. If so, there are known problems with the most recent release of
> PerfSuite on that processor. We have finished adding the support for that
> system, but have not yet placed a new software release on SourceForge or at
> NCSA. We hope to do so in the very near future, though.
>
> Sorry for the difficulties, please let me know if you also suspect this may
> be what is affecting you.
>
> Rick
>
> Cheng Liao wrote:
>
>
>
>
>
> I just installed perfsuite on some linux x86_64 machines (only one with
> papi and perfctr).
> However, even though 'make -s check' outputs looked fine, all the psprocess
> outputs would
> be 'empty' and show no profile timing info. Is this something that can be
> easily fixed?
> Thanks,
> Cheng
> PerfSuite Hardware Performance Summary Report
>
> Version : 1.0
> Created : Mon Jul 20 11:20:26 AM PDT 2009
> Generator : psprocess 0.3
> XML Source : ls.15381.em64td.xml
>
> Execution Information
>
> ============================================================================================
> Collector : libpshwpc
> Date : Sat Jul 18 17:31:54 2009
> Host : em64td
> User : cliao
> Command : ls
>
> Processor and System Information
>
> ============================================================================================
> Node CPUs : 8
> Vendor : Intel
> Family : Pentium Pro (P6)
> Brand : Intel(R) Xeon(R) CPU X5570 @ 2.93GHz
> CPU Revision : 4
> Clock (MHz) : 2933.589
> Memory (MB) : 24096.66
> Pagesize (KB) : 4
>
> Cache Information
>
> ============================================================================================
> Cache levels : 0
>
> Profile Information
>
> ============================================================================================
> Class : profil
> Version : 2.5
> Event : milliseconds
> Period : 10
> Samples : 0
> Domain : user
> Run Time : 0.00 (seconds)
> Min Self % : (all)
>
> Module Summary
>
> --------------------------------------------------------------------------------
> Samples Self % Total % Module
>
>
> File Summary
>
> --------------------------------------------------------------------------------
> Samples Self % Total % File
>
>
> Function Summary
>
> --------------------------------------------------------------------------------
> Samples Self % Total % Function
>
>
> Function:File:Line Summary
>
> --------------------------------------------------------------------------------
> Samples Self % Total % Function:File:Line
>
> ------------------------------------------------------------------------
>
>
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