Re: [PATCH v2] perf, x86: Fix event scheduler for constraints withoverlapping counters

[Peter Zijlstra]

On Wed, 2011-05-18 at 23:20 +0200, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> > >                         if (c->weight != w)
> > >                                 continue;
> > >  
> > > -                       for_each_set_bit(j, c->idxmsk, X86_PMC_IDX_MAX) {
> > > -                               if (!test_bit(j, used_mask))
> > > +                       /* for each bit in idxmsk starting from idx */
> > > +                       while (idx < X86_PMC_IDX_MAX) {
> > > +                               idx = find_next_bit(c->idxmsk, X86_PMC_IDX_MAX,
> > > +                                                   idx);
> > 
> > I'd be mighty tempted to ignore that 80 column rule here ;-)
> 
> Please put the body of the loop into a helper function, the function is large 
> and there are countless col80 uglinesses in it!

I just tried that, its real ugly due to the amount of state you need to
pass around.
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