Re: [PATCH 09/27] perf stat: Introduce perf_counts function

From: Jiri Olsa
Date: Tue Jun 23 2015 - 18:03:27 EST

On Tue, Jun 23, 2015 at 06:11:54PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jun 23, 2015 at 12:36:10AM +0200, Jiri Olsa escreveu:
> > Introducing perf_counts function, that returns
> > 'struct perf_counts_values' pointer for given cpu.
> > - evsel->counts->cpu[cpu] = *count;
> > + *perf_counts(evsel->counts, cpu) = *count;
> For consistency, just like thread_map__set_pid(), please have a:

it's consistent with xyarray__entry

> perf_counts__set(evsel->counts, *cont);
> In addition to its counterpart:
> perf_counts__value(evsel->counts, cpu);
> Since you're not storing multiple entries per bucket, we need to use the
> "value" idiom.

perf_counts returns pointer to the 'struct perf_counts_values'
which is clean and valid and IMO the code is more readable

You use just 'perf_counts(counts, cpu, thread)' and get values
and do whatever you want with them.. why introduce 2 functions
for it?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at