Hi,

I'm trying to use valgrind for the first time seriously to profile my app. See output from console below;

Darius-Blaszyks-Mac-mini:fileio dariusblaszyk$ fpc -gv fileio.pp Free Pascal Compiler version 2.7.1 [2012/05/18] for i386 Copyright (c) 1993-2012 by Florian Klaempfl and others Target OS: Darwin for i386
Compiling fileio.pp
Assembling (pipe) fileio.s
Linking fileio
55 lines compiled, 1.9 sec
Darius-Blaszyks-Mac-mini:fileio dariusblaszyk$ valgrind --tool=callgrind ./fileio valgrind: ./fileio: cannot execute binary file

After googling I found some remark about adding a -m32 flag with GCC. Is this the same issue I have here? What is the remedy?

Regards, Darius

Darius Blaszyk wrote

I'm trying to use valgrind for the first time seriously to profile my app. See output from console below;

[snip]

After googling I found some remark about adding a -m32 flag with GCC. Is this the same issue I have here?

No, because -m32 is a Linux-specific flag. And Valgrind for Mac OS X by default supports both 32 and 64 bit binaries.

What is the remedy?

I don't know. It works fine here on Mac OS X 10.6 with Valgrind 3.8.0:

$ fpc -gv prog.pp
Free Pascal Compiler version 2.6.0 [2011/12/30] for i386 Copyright (c) 1993-2011 by Florian Klaempfl and others Target OS: Darwin for i386
Compiling prog.pp
Compiling unit1.pp
Assembling (pipe) unit1.s
Assembling (pipe) prog.s
Linking prog
18 lines compiled, 1.2 sec

$ valgrind --tool=cachegrind ./prog
==790== Cachegrind, a cache and branch-prediction profiler ==790== Copyright (C) 2002-2011, and GNU GPL'd, by Nicholas Nethercote et al. ==790== Using Valgrind-3.8.0.SVN and LibVEX; rerun with -h for copyright info ==790== Command: ./prog
==790==
--790-- ./prog:
--790-- dSYM directory is missing; consider using --dsymutil=yes ==790==
==790== I refs: 1,061,926
==790== I1 misses: 1,811
==790== LLi misses: 1,372
==790== I1 miss rate: 0.17%
==790== LLi miss rate: 0.12%
==790==
==790== D refs: 541,094 (384,427 rd + 156,667 wr) ==790== D1 misses: 2,997 ( 1,802 rd + 1,195 wr) ==790== LLd misses: 2,156 ( 1,326 rd + 830 wr) ==790== D1 miss rate: 0.5% ( 0.4% + 0.7% ) ==790== LLd miss rate: 0.3% ( 0.3% + 0.5% ) ==790==
==790== LL refs: 4,808 ( 3,613 rd + 1,195 wr) ==790== LL misses: 3,528 ( 2,698 rd + 830 wr) ==790== LL miss rate: 0.2% ( 0.1% + 0.5%

You may want to look at the Instruments application that comes with Xcode though. That one offers a lot of different profiling options based on performance counters and sampling.

Jonas

I found out that my valgrind (from MacPorts) does not support 32bit applications. The solution was to add -Px86_64 to commandline. I have added this tip to the wiki BTW, so it won't get forgotten.

You may want to look at the Instruments application that comes with Xcode though. That one offers a lot of different profiling options based on performance counters and sampling.

Thanks! I will have a look. I already found Shark, but that was a bit confusing to me.

Regards, Darius

Jonas Maebe wrote

You may want to look at the Instruments application that comes with Xcode though. That one offers a lot of different profiling options based on performance counters and sampling.

What command line options does this need? I tried a number of them but I keep on getting "Unable to configure sampling trigger for XXXX"

Darius