Josef Weidendorfer <josef.weidendor...@gmx.de> wrote on 11/19/2012
05:07:13 PM:
> From: Josef Weidendorfer <josef.weidendor...@gmx.de>
> To: Geoff Alexander/Raleigh/IBM@IBMUS,
> Cc: valgrind-users@lists.sourceforge.net
> Date: 11/19/2012 05:07 PM
> Subject: Re: [Valgrind-users] Why does Ir count in Callgrind and
> Cachegrind differ?
>
> Am 19.11.2012 11:38, schrieb Josef Weidendorfer:
> > Hmm. I think I just found a bug here :(
>
> I just fixed that bug in SVN trunk.
> So if that was the issue you observed, can you
> check current SVN?
>
> Josef
>
Josef,
I tested with both Valgrind 3.8.1 and Valgrind SVN-13143 as well as
retesting with the Valgrind 3.6.1 that comes with openSUSE 12.1. The SVN
version appears to fix the problem as the Cachegrind and Callgrind
instruction counts now only differ by 3 out of over 8.9 billion. Here are
the results of my test runs:
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug> valgrind
--tool=cachegrind PerfTestSet
==16039== Cachegrind, a cache and branch-prediction profiler
==16039== Copyright (C) 2002-2012, and GNU GPL'd, by Nicholas
Nethercote et al.
==16039== Using Valgrind-3.9.0.SVN and LibVEX; rerun with -h for
copyright info
==16039== Command: PerfTestSet
==16039==
==16039==
==16039== I refs: 8,921,481,138
==16039== I1 misses: 1,327
==16039== LLi misses: 1,317
==16039== I1 miss rate: 0.00%
==16039== LLi miss rate: 0.00%
==16039==
==16039== D refs: 5,275,956,419 (3,342,655,668 rd +
1,933,300,751 wr)
==16039== D1 misses: 37,330,601 ( 33,179,400 rd + 4,151,201
wr)
==16039== LLd misses: 11,259,050 ( 7,507,219 rd + 3,751,831
wr)
==16039== D1 miss rate: 0.7% ( 0.9% + 0.2% )
==16039== LLd miss rate: 0.2% ( 0.2% + 0.1% )
==16039==
==16039== LL refs: 37,331,928 ( 33,180,727 rd + 4,151,201
wr)
==16039== LL misses: 11,260,367 ( 7,508,536 rd + 3,751,831
wr)
==16039== LL miss rate: 0.0% ( 0.0% + 0.1% )
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug>
/usr/local/valgrind-3.8.1/bin/valgrind --tool=cachegrind PerfTestSet
==16044== Cachegrind, a cache and branch-prediction profiler
==16044== Copyright (C) 2002-2012, and GNU GPL'd, by Nicholas
Nethercote et al.
==16044== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright
info
==16044== Command: PerfTestSet
==16044==
==16044==
==16044== I refs: 8,921,481,169
==16044== I1 misses: 1,327
==16044== LLi misses: 1,317
==16044== I1 miss rate: 0.00%
==16044== LLi miss rate: 0.00%
==16044==
==16044== D refs: 5,275,956,429 (3,342,655,670 rd +
1,933,300,759 wr)
==16044== D1 misses: 37,330,606 ( 33,179,405 rd + 4,151,201
wr)
==16044== LLd misses: 11,259,052 ( 7,507,220 rd + 3,751,832
wr)
==16044== D1 miss rate: 0.7% ( 0.9% + 0.2% )
==16044== LLd miss rate: 0.2% ( 0.2% + 0.1% )
==16044==
==16044== LL refs: 37,331,933 ( 33,180,732 rd + 4,151,201
wr)
==16044== LL misses: 11,260,369 ( 7,508,537 rd + 3,751,832
wr)
==16044== LL miss rate: 0.0% ( 0.0% + 0.1% )
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug>
/usr/bin/valgrind --tool=cachegrind PerfTestSet
==16052== Cachegrind, a cache and branch-prediction profiler
==16052== Copyright (C) 2002-2010, and GNU GPL'd, by Nicholas
Nethercote et al.
==16052== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright
info
==16052== Command: PerfTestSet
==16052==
==16052==
==16052== I refs: 8,921,480,599
==16052== I1 misses: 1,327
==16052== LLi misses: 1,317
==16052== I1 miss rate: 0.00%
==16052== LLi miss rate: 0.00%
==16052==
==16052== D refs: 5,275,956,329 (3,342,655,583 rd +
1,933,300,746 wr)
==16052== D1 misses: 37,242,762 ( 33,096,112 rd + 4,146,650
wr)
==16052== LLd misses: 11,259,039 ( 7,507,218 rd + 3,751,821
wr)
==16052== D1 miss rate: 0.7% ( 0.9% + 0.2% )
==16052== LLd miss rate: 0.2% ( 0.2% + 0.1% )
==16052==
==16052== LL refs: 37,244,089 ( 33,097,439 rd + 4,146,650
wr)
==16052== LL misses: 11,260,356 ( 7,508,535 rd + 3,751,821
wr)
==16052== LL miss rate: 0.0% ( 0.0% + 0.1% )
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug> valgrind
--tool=callgrind PerfTestSet
==16058== Callgrind, a call-graph generating cache profiler
==16058== Copyright (C) 2002-2012, and GNU GPL'd, by Josef Weidendorfer
et al.
==16058== Using Valgrind-3.9.0.SVN and LibVEX; rerun with -h for
copyright info
==16058== Command: PerfTestSet
==16058==
==16058== For interactive control, run 'callgrind_control -h'.
==16058==
==16058== Events : Ir
==16058== Collected : 8921481135
==16058==
==16058== I refs: 8,921,481,135
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug>
/usr/local/valgrind-3.8.1/bin/valgrind --tool=callgrind PerfTestSet
==16379== Callgrind, a call-graph generating cache profiler
==16379== Copyright (C) 2002-2012, and GNU GPL'd, by Josef Weidendorfer
et al.
==16379== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright
info
==16379== Command: PerfTestSet
==16379==
==16379== For interactive control, run 'callgrind_control -h'.
==16379==
==16379== Events : Ir
==16379== Collected : 8901479966
==16379==
==16379== I refs: 8,901,479,966
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug>
/usr/bin/valgrind --tool=callgrind PerfTestSet
==16386== Callgrind, a call-graph generating cache profiler
==16386== Copyright (C) 2002-2010, and GNU GPL'd, by Josef Weidendorfer
et al.
==16386== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright
info
==16386== Command: PerfTestSet
==16386==
==16386== For interactive control, run 'callgrind_control -h'.
==16386==
==16386== Events : Ir
==16386== Collected : 8901479396
==16386==
==16386== I refs: 8,901,479,396
gdlxn@alexander-linux:~/workspace/eccl/perftest/debug>
Thanks for fixing the problem.
Geoff Alexander, Ph.D.
Software Engineer, Corporate Tools Development
IBM Corporation
RTP, NC
------------------------------------------------------------------------------
Monitor your physical, virtual and cloud infrastructure from a single
web console. Get in-depth insight into apps, servers, databases, vmware,
SAP, cloud infrastructure, etc. Download 30-day Free Trial.
Pricing starts from $795 for 25 servers or applications!
http://p.sf.net/sfu/zoho_dev2dev_nov
_______________________________________________
Valgrind-users mailing list
Valgrind-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/valgrind-users
