[zeromq-dev] profiling a czmq program with gprof

[Michael Haberler]

Am 23.09.2012 um 01:59 schrieb Steven McCoy:

> On 22 September 2012 16:41, Michael Haberler <mail17 at mah.priv.at> wrote:
> I tried to profile a program using czmq with gprof which runs fine when compiled with gcc, but without -pg
> 
> with -pq, the program cops out with:
> 
> 12-09-22 22:37:24 I: zloop: interrupted (-1) - Interrupted system call
> 
> any suggestions?
> 
> 
> You'll be better off with oprofile based profiling which uses the CPU performance counters for greater accuracy on measurements.

Steven,

thanks - I was not aware of this tool, need to look into it

btw the fix to the reported problem was to RTFM and call zloop_start() like so:

 do {
        retval = zloop_start(loop);
    } while (!(retval || zctx_interrupted));

even then though, gprof output remains pretty useless.

- Michael

> -- 
> Steve-o 
> 
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