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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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