callgrind Questions

2

I want to redirect the output of callgrind to a file name call_grind.txt, but when ever I try to do that, a file is generated but there is no output inside that file. For example: valgrind --tool...
Eckhardt asked 20/7, 2015 at 10:52

1

Could anyone tell me how to interest the results from kcachegrind. I had two versions of my code (v1, v2) both compiled in debug mode. I ran them through valgrind with options: valgrind --tool=c...
Damarisdamarra asked 21/5, 2014 at 14:27

3

I was using valgrind tool - callgrind and kcachegrind for profiling a large project and was wondering if there is a way that callgrind reports the stats from all the functions (not just the most ex...
Prune asked 17/11, 2015 at 23:51

5

When running my program with valgrind / callgrind I get the following message a lot: ==21734== brk segment overflow in thread #1: can't grow to 0x4a39000 (with different addresses) Note that it i...
Gott asked 1/2, 2016 at 11:15

2

Solved

I'm trying to profile (with Callgrind) a specific part of my code by removing noise and computation that I don't care about. Here is an example of what I want to do: for (int i=0; i<maxSample; ...
Suppurate asked 3/12, 2012 at 17:5

4

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Total Time spent by a function in an application can be broadly divided in to two components: Time spent on actual computation (Tcomp) Time spent on memory accesses (Tmem) Typically profilers p...
Condyloid asked 15/11, 2016 at 9:6

1

Goal: I would like to be able to analyze the output of callgrind (and later cachegrind too) and would like to see meaningful variable names when using the callgrind_annotate CLI. Prior Research: I ...
Letsou asked 20/11, 2016 at 12:21

1

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I'm using callgrind to profile a small piece of code. Callgrind output files are well generated, their content looks ok, but I'm unable to open them with kcachegrind: I get the following error mess...
Scarlatina asked 11/1, 2017 at 10:40

4

I want to profile my code. So I do: valgrind --tool=callgrind my_program [programm arguments] kcachegrind callgrind.out.x Now I have kcachegrind window like this: There is a lot of core and l...
Goblin asked 28/10, 2016 at 12:25

3

I want to use valgrind to do some profiling, since it does not need re-build the program. (the program I want to profile is already build with “-g") But valgrind(callgrind) is quite slow ... so he...
Db asked 8/3, 2010 at 8:21

1

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I am trying to profile for certain executable using valgrind - callgrind tool. I have created annotated output using callgrind_annotate --auto=yes. The created output tells me about the Ir count , ...
Emmalynn asked 30/10, 2015 at 11:7

7

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Is there any tool, other than KCacheGrind, being able to view callgrind results? Preferably for Windows platform?
Copenhagen asked 14/5, 2009 at 15:7

1

I want to use Callgrind to find bottlenecks in some complicated Rcpp code. Since I couldn't get it to work, I decided to write a simple R file instead, to make sure it was doing what it should. Ho...
Canst asked 26/2, 2015 at 15:51

1

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I'd like to profile my application using callgrind. Now, since it takes a very long time, in the meanwhile I go on with web-browsing, compiling and other intensive tasks on the same machine. Am I ...
Hob asked 11/9, 2015 at 10:48

1

I'm trying to understand how a program's performance changes when run with different options—I have a factor of 1.8 I'd like to explain. I've been doing profiling with [valgrind]'s callgrind ...
Poop asked 12/7, 2011 at 18:30

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I am trying to view the annotated source using $ valgrind --tool=callgrind ./myProgram followed by $ kcachegrind using Ubuntu 12.04 (and I'm having the same problem with $ qcachegrind using Mac OSX...
Lineberry asked 10/4, 2014 at 17:49

2

I am doing some experiments with Cachegrind, Callgrind and Gem5. I noticed that a number of accesses were counted as read for cachegrind, as write for callgrind and for both read and write by gem5....
Clubman asked 3/4, 2013 at 14:44

2

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I need a dynamic call graph for my app. I run it with callgrind tool (valgrind suite) and got callgrind.out.xxxxx file. Now, I want to make a graphical representation of this data. KCacheGrind does...
Elkins asked 14/2, 2012 at 15:0

3

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I am profiling my code and I already found the most expensive part of it. However it happens in an inlined function. To measure the impact I had forced the function to be not inlined. Now I would ...
Mechanic asked 23/10, 2012 at 12:20

0

I have built my program with "-g -O2" and ran valgrind+cachegrind. I am unsure how to interpret the output. Here is the output: http://daviddoria.com/Uploads/callgrind.CacheMisses My "whole progr...
Calla asked 1/9, 2012 at 21:40

1

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I am using callgrind to profile a linux multi-threaded app and mostly it's working great. I start it with instrumentation off (--instr-atstart=no) and then once setup is done i turn it on with call...
Elvyn asked 27/1, 2012 at 19:30

1

How to view output of gprof in kcachegrind? Is here a converter from gcc's gmon.out into callgrind.out?
Phuongphycology asked 1/9, 2011 at 17:29

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When profiling the log Kcachegrind shows %of inclusive as 13.92%. Should it not be close to 100% as mentioned in the FAQ Q:1?? Here is the screenshot of the profile log
Housewifery asked 16/11, 2011 at 6:52

1

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I have a model code on which kcachegrind/callgrind reports strange results. It is kind of dispatcher function. The dispatcher is called from 4 places; each call says, which actual do_J function to ...
Jibe asked 20/9, 2011 at 16:54

2

I currently am developing a shared lilbrary for loading into PostgreSQL (as C-Language functions, see here). Now I would like to profile the function in this library without recompiling PostgreSQL ...

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