trace-cmd: Use sysconf to figure out # of CPUs

Use the POSIX  sysconf instead of the hack to figure out the number of
CPUs the current machine has.

Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/trace-cmd.c b/trace-cmd.c
index 6fbac8c..cce499a 100644
--- a/trace-cmd.c
+++ b/trace-cmd.c
@@ -981,6 +981,13 @@ static int count_cpus(void)
         size_t n;
         int r;
 
+        cpus = sysconf(_SC_NPROCESSORS_ONLN);
+        if (cpus > 0)
+                return cpus;
+
+        warning("sysconf could not determine number of CPUS");
+
+        /* Do the hack to figure out # of CPUS */
         n = 1024;
         pn = &n;
         pbuf = buf;