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authorWill Deacon <will.deacon@arm.com>2015-04-23 15:00:16 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-04 12:43:40 -0300
commit762abdc0c6c013425958cd9f5105f4e32268d434 (patch)
tree18eaa19af5d0d0763bd7a3dc362e9e56d8508c4a /tools/perf/Makefile
parentdd3092075c3263fca7a3e98b143ad2296aab71b4 (diff)
downloadop-kernel-dev-762abdc0c6c013425958cd9f5105f4e32268d434.zip
op-kernel-dev-762abdc0c6c013425958cd9f5105f4e32268d434.tar.gz
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.deacon@arm.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <david.ahern@oracle.com> Cc: Mark Rutland <Mark.Rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20150423140454.GJ1652@arm.com [ Made it fall back to parsing /proc when getconf not found ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Makefile')
-rw-r--r--tools/perf/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index c699dc3..d31a7bb 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
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