Messages in this thread | | | Date | Thu, 17 Sep 2009 22:09:14 +0200 | From | Ingo Molnar <> | Subject | Re: [tip:perfcounters/core] perf sched: Determine the number of CPUs automatically |
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* Ingo Molnar <mingo@elte.hu> wrote:
> > * Arjan van de Ven <arjan@infradead.org> wrote: > > > On Thu, 17 Sep 2009 18:07:09 GMT > > > > > > perf sched: Determine the number of CPUs automatically > > > > > > For 'perf sched map' output, determine max_cpu automatically, > > > instead of the static default of 15. > > > > > > static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 }; > > > > > > @@ -1818,6 +1818,9 @@ static struct trace_sched_handler map_ops = { > > > > > > static void __cmd_map(void) > > > { > > > + max_cpu = system("exit `grep ^processor /proc/cpuinfo | wc > > > -l`"); > > > > YUCK. > > > > what is wrong with > > max_cpu = sysconf(_SC_NPROCESSORS_CONF); > > ?? > > That's nicer - mind sending a patch?
fixed this up myself.
Ingo
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