perf tools: Use getconf to determine number of online CPUs
authorWill Deacon <will.deacon@arm.com>
Thu, 23 Apr 2015 14:00:16 +0000 (15:00 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Mon, 4 May 2015 15:43:40 +0000 (12:43 -0300)
commit762abdc0c6c013425958cd9f5105f4e32268d434
tree18eaa19af5d0d0763bd7a3dc362e9e56d8508c4a
parentdd3092075c3263fca7a3e98b143ad2296aab71b4
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>
tools/perf/Makefile