Em Mon, May 11, 2015 at 12:58:14PM -0300, a...@redhat.com 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/20150427190356.gd...@krava.redhat.com
> > >
> > > 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 <mi...@kernel.org>
>
> IIRC it was merged already, lemme check...
Yes, only for perf/core:
[acme@zoo linux]$ git show 762abdc0c6c013425958cd9f5105f4e32268d434
commit 762abdc0c6c013425958cd9f5105f4e32268d434
Author: Will Deacon <will.dea...@arm.com>
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 <will.dea...@arm.com>
Acked-by: Jiri Olsa <jo...@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: David Ahern <david.ah...@oracle.com>
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>
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]$
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