Re: [iiwusynth-devel] Optimization

[Josh Green]

On Wed, 2002-03-06 at 07:22, Peter Hanappe wrote:
> On Mon, 2002-02-25 at 02:19, Josh Green wrote:
> > Ohh yeah, forgot to reply to your bit about profilers. Have you looked
> > into gprof yet? You just need to compile your program with profiling
> > enabled (-pg for gcc to output gprof data). When you run your program
> > that has been compiled with the -pg switch it outputs a gmon.out file
> > which can be processed with gprof. Not sure how well it handles multiple
> > threads though. Its been a while since I tried this, so I might be wrong
> > about stuff :) Lates..
> 
> Thanks for the hint. Will check.
> 
> Peter
> 

I just tried it last night with not much luck. There is probably
something you need to do with threads and the like. I didn't give it
much of a try but it only showed main and some other function. Perhaps
it would be better to use the pentium timer and just make some functions
that can be called to start and stop it and store the count (perhaps do
some min/max/avg stuff?). We could then target it at specific spots to
get a more direct idea of what parts of the synthesis loop are taking up
the most time. I just realized last night that a lot of my performance
issues were because I had debugging enabled (duhh!) this thought had
totally escaped me before for some reason, even though I knew that there
wasn't any optimization going on. Now I was unable to max it out with
the few instruments I tested on my PII-366. A lot more optimized :)
Cheers!
        Josh Green