Re: [hatari-devel] Re: Profiler CPU cycles values

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

On tiistai 12 helmikuu 2013, Eero Tamminen wrote:
> On tiistai 12 helmikuu 2013, Douglas Little wrote:
> > ...one more bit of supporting information - although I don't know if it
> > is relevant to this. I notice every time I use the profiler I see this
> > 'Counters OVERFLOW' warning. This happens regardless of how long the
> > profiling session is (a few seconds is enough).
> ...
> > - used cycles:
> >   3650737951796 (99.65% of all)
> > 
> > - instruction cache misses:
> >   513112 (99.96% of all)
> > 
> > *- Counters OVERFLOW!*

Douglas, are you still getting unexpected cycles counter overflows?


> Cycles counter is always larger than instruction or cache miss count.
> When statistics notices largest cycles count value to be largest unsigned
> value i.e. statistics collection for some instruction to have reached
> its max value, it will note the user about this.
> 
> I'll look into that after I've gotten the callgraph stuff to working
> state and we otherwise look more into cycles counts.  For now cycle
> counts are best ignored for CPU.


	- Eero