Re: [PATCH] perf, tools: Support spark lines in perf stat v2

[Andi Kleen <andi@firstfloor.org>]

> > +void print_stat_spark(FILE *f, struct stats *stat)
> > +{
> > +	int n = stat->n, len;
> > +
> > +	if (n <= 1)
> > +		return;
> > +	len = n;
> 
> It seems the 'n' is not needed at all - just use 'len'.

This would break ".." for n == NUM_SPARK_VALS
> 
> 
> > +	if (len > NUM_SPARK_VALS)
> > +		len = NUM_SPARK_VALS;
> > +	if (all_the_same(stat->svals, len))
> > +		return;
> 
> Why does it skip printing if all values are same?  I think you wanted to
> skip the "all zero" (uncounted) case, right?

A spark line is meaningless if all values are the same.

-Andi