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[Bug gprof/4848] New: gprof gives wrong time summary on multi core / SMP
From: |
markus dot maresch at bigfoot dot com |
Subject: |
[Bug gprof/4848] New: gprof gives wrong time summary on multi core / SMP environment |
Date: |
26 Jul 2007 18:21:38 -0000 |
GPROF: GNU gprof 2.17.50.0.6-5.fc6
UNAME-A: Linux <myhost> 2.6.20-1.2962.fc6 #1 SMP Tue Jun 19 18:24:12 EDT 2007
i686 i686 i386 GNU/Linux
On single core CPU's and older kernels the cumulative seconds column converged
well towards the user time for the executed command. On multi core and SMP
machines this seems way off - not half (for dual core) - just something.
Reproduce: I have a simple C program to demonstrate this.
--
Summary: gprof gives wrong time summary on multi core / SMP
environment
Product: binutils
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: gprof
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: markus dot maresch at bigfoot dot com
CC: bug-binutils at gnu dot org
GCC build triplet: 2.6.20-1.2962.fc6
GCC host triplet: i686
GCC target triplet: i686
http://sourceware.org/bugzilla/show_bug.cgi?id=4848
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- [Bug gprof/4848] New: gprof gives wrong time summary on multi core / SMP environment,
markus dot maresch at bigfoot dot com <=