[PATCH] pmcannotate tool

Jeff Roberson jroberson at jroberson.net
Sun Nov 23 16:21:00 PST 2008

On Mon, 24 Nov 2008, Attilio Rao wrote:

> 2008/11/23, Alexander Leidinger <Alexander at leidinger.net>:
>> Quoting Attilio Rao <attilio at freebsd.org> (from Sun, 23 Nov 2008 14:02:22
>> +0100):
>>> pmcannotate is a tool that prints out sources of a tool (in C or
>>> assembly) with inlined profiling informations retrieved by a prior
>>> pmcstat analysis.
>>> If compared with things like callgraph generation, it prints out
>>> profiling on a per-instance basis and this can be useful to find, for
>>> example, badly handled caches, too high latency instructions, etc.
>>  Can this also be used to do some code coverage analysis? What I'm
>> interested in is to enable something, run some tests in userland, disable
>> this something, and then run a tool which tells me which parts of specific
>> functions where run or not.
> Yes, this is exactly what it does.
> You can see traces for any sampled PC and so get a profiling anslysis
> on a per-instance basis.

I would add that it is only sampled so you don't see every instruction 
executed.  You can use gcov for that however.  That's precisely what it's 


> Thanks,
> Attilio
> -- 
> Peace can only be achieved by understanding - A. Einstein
> _______________________________________________
> freebsd-arch at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-arch
> To unsubscribe, send any mail to "freebsd-arch-unsubscribe at freebsd.org"

More information about the freebsd-performance mailing list