Comments on: Stripping perf out from kernel source http://www.politreco.com/2010/03/stripping-perf-out-from-kernel-source/ by Lucas De Marchi Sat, 07 Jan 2012 13:33:10 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Lucas De Marchi http://www.politreco.com/2010/03/stripping-perf-out-from-kernel-source/comment-page-1/#comment-9850 Lucas De Marchi Sun, 21 Mar 2010 19:47:37 +0000 http://www.politreco.com/?p=241#comment-9850 Yes, it's related to opensolaris/freebsd DTrace. There are a few dependencies, namely: elfutils, zlib, perl (perl dependency was introduced with latest version). To compile it you also need asciidoc and xmlto for documentation and libdwarf. Valgrind is used mostly to find bugs in memory accesses like using an uninitialized var, freed memory, wrong pointer dereference etc. It does can be used to profile cache references, but it uses a simulation model to give you the miss/hit-rate. Perf, instead, relies on hardware counters and thus you can profile your application with the architecture it is running on. It was first born as an access to hardware counters, but now it's becoming the <em>de facto</em> performance debugging utility for linux kernel. Yes, it’s related to opensolaris/freebsd DTrace. There are a few dependencies, namely: elfutils, zlib, perl (perl dependency was introduced with latest version). To compile it you also need asciidoc and xmlto for documentation and libdwarf.

Valgrind is used mostly to find bugs in memory accesses like using an uninitialized var, freed memory, wrong pointer dereference etc. It does can be used to profile cache references, but it uses a simulation model to give you the miss/hit-rate. Perf, instead, relies on hardware counters and thus you can profile your application with the architecture it is running on.

It was first born as an access to hardware counters, but now it’s becoming the de facto performance debugging utility for linux kernel.

]]> By: Ricardo Guiraldelli http://www.politreco.com/2010/03/stripping-perf-out-from-kernel-source/comment-page-1/#comment-9802 Ricardo Guiraldelli Tue, 16 Mar 2010 01:17:29 +0000 http://www.politreco.com/?p=241#comment-9802 Is this something like OpenSolaris/FreeBSD DTrace? Does it need a lot of dependencies, doesn't it? Is this suitable for embedded apps? How different is perf from Valgrind? Is this something like OpenSolaris/FreeBSD DTrace? Does it need a lot of dependencies, doesn’t it? Is this suitable for embedded apps?

How different is perf from Valgrind?

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