Tools to detect False Sharing in a C/C++ application

Question

Are there any tools that detect and report False Sharing for applications written in C or C++?

while not showing _false_ sharing directly, intel vtunes can at least on certain CPUs detect sharing, but it costs money and is hard to interpret the result. — PlasmaHH, Aug 16 '11 at 15:04

score 4 · Accepted Answer · answered Dec 24 '14 at 16:18

Try Sheriff and Predator. Sheriff is at https://github.com/plasma-umass/sheriff, while Predator is at https://github.com/plasma-umass/Predator. Predator is a compiler-based approach that you have to recompile your program using a new LLVM compiler. It is the most exhaustive detection tool up to now. Sheriff is library but it can only detect false sharing if you are using pthreads library.

score 3 · Answer 2 · answered Aug 16 '11 at 14:42

3

Try the DRD (data race detection) module of valgrind.

From the manual it looks like it can be used to detect False sharing.

answered Aug 16 '11 at 14:42

Karoly Horvath

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Unfortunately, DRD does not detect anything, even in the simplest cases of false sharing such the one described on http://en.wikipedia.org/wiki/False_sharing – gui11aume Feb 23 '14 at 15:01
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Actually, in the manual there is no claim that DRD is able to detect false sharing – Paolo M Nov 26 '15 at 15:32

score 1 · Answer 3 · answered Apr 20 '15 at 22:26

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Perf("Performance Counters for Linux")

Commands:

sudo perf record -e cache-misses,anything_else_you_want ./your_program 
sudo perf report

answered Apr 20 '15 at 22:26

Newbie 1337

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Tools to detect False Sharing in a C/C++ application

3 Answers3

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