On Mon, May 11, 2015 at 04:59:58PM +0100, [email protected] wrote: > Em Mon, May 11, 2015 at 12:58:14PM -0300, [email protected] escreveu: > > Em Mon, May 11, 2015 at 02:33:04PM +0200, Ingo Molnar escreveu: > > > > That was already proposed here (as part of the fallback from getconf): > > > > > > > > https://lkml.kernel.org/r/[email protected] > > > > > > > > but I'm not sure what happened to the patch. > > > > > > Sending out the latest/best version as a reminder for Arnaldo will > > > sure help it along. > > > > > > Acked-by: Ingo Molnar <[email protected]> > > > > IIRC it was merged already, lemme check... > > Yes, only for perf/core:
Ah, that explains why I couldn't see it in my tree. Could we get it in for 4.1 please, as this is a regression for arm/arm64 (where the auto-detection used to work fine)? Cheers, Will > > [acme@zoo linux]$ git show 762abdc0c6c013425958cd9f5105f4e32268d434 > commit 762abdc0c6c013425958cd9f5105f4e32268d434 > Author: Will Deacon <[email protected]> > Date: Thu Apr 23 15:00:16 2015 +0100 > > perf tools: Use getconf to determine number of online CPUs > > Parsing /proc/cpuinfo is a fiddly, arch-dependent business and a recent > change to get it working for Sparc broke arm and arm64 platforms. > > Use sysconf to determine the number of online CPUs only parsing > /proc/cpuinfo when sysconf is not available. > > Signed-off-by: Will Deacon <[email protected]> > Acked-by: Jiri Olsa <[email protected]> > Tested-by: Arnaldo Carvalho de Melo <[email protected]> > Cc: David Ahern <[email protected]> > Cc: Mark Rutland <[email protected]> > Cc: Namhyung Kim <[email protected]> > Link: http://lkml.kernel.org/r/[email protected] > [ Made it fall back to parsing /proc when getconf not found ] > Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> > > diff --git a/tools/perf/Makefile b/tools/perf/Makefile > index c699dc35eef9..d31a7bbd7cee 100644 > --- a/tools/perf/Makefile > +++ b/tools/perf/Makefile > @@ -24,7 +24,7 @@ unexport MAKEFLAGS > # (To override it, run 'make JOBS=1' and similar.) > # > ifeq ($(JOBS),) > - JOBS := $(shell egrep -c '^processor|^CPU' /proc/cpuinfo 2>/dev/null) > + JOBS := $(shell (getconf _NPROCESSORS_ONLN || egrep -c > '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null) > ifeq ($(JOBS),0) > JOBS := 1 > endif > [acme@zoo linux]$ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
