On Mon, Apr 27, 2015 at 03:45:35PM -0300, Arnaldo Carvalho de Melo wrote: SNIP
> > > [acme@ssdandy linux]$ > > > > > > > how about this one > > I came up with this one, that doesn't introduces a new file: ook > > From e8155c06652a05f2307d53823a7937be5dad4e32 Mon Sep 17 00:00:00 2001 > From: Will Deacon <will.dea...@arm.com> > Date: Thu, 23 Apr 2015 15:00:16 +0100 > Subject: [PATCH] tools perf: Use getconf to determine number of online CPUs > > Parsing /proc/cpuinfo is a fiddly, arch-dependent business anda 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 <will.dea...@arm.com> > Cc: David Ahern <david.ah...@oracle.com> > Cc: Jiri Olsa <jo...@kernel.org> > Cc: Mark Rutland <mark.rutl...@arm.com> > Cc: Namhyung Kim <namhy...@kernel.org> > Link: http://lkml.kernel.org/r/20150423140454.gj1...@arm.com > [ Made it fall back to parsing /proc when getconf not found ] > Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> > --- > tools/perf/Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/Makefile b/tools/perf/Makefile > index c699dc35eef9..bc846b83c295 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' > /proc/cpuinfo) 2>/dev/null) how about the 'CPU[0-9]' someone asked for? jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
