[RFC PATCH] make SMP option only use online cpus (cyclictest)

[Joakim Hernberg <jbh@alchemy.lu>]

When I boot my 8 core i7 laptop with the maxcpus=4 kernel boot flag,
cyclictest -S runs 8 threads.  This patch makes it only use the online
cpus instead.

diff --git a/src/cyclictest/cyclictest.c
b/src/cyclictest/cyclictest.c index 4547831..92fc346 100644
--- a/src/cyclictest/cyclictest.c
+++ b/src/cyclictest/cyclictest.c
@@ -1740,7 +1740,7 @@ int main(int argc, char **argv)
        sigset_t sigset;
        int signum = SIGALRM;
        int mode;
-       int max_cpus = sysconf(_SC_NPROCESSORS_CONF);
+       int max_cpus = sysconf(_SC_NPROCESSORS_ONLN);
        int i, ret = -1;
        int status;
 
diff --git a/src/cyclictest/rt_numa.h b/src/cyclictest/rt_numa.h
index e64c446..c2b3e85 100644
--- a/src/cyclictest/rt_numa.h
+++ b/src/cyclictest/rt_numa.h
@@ -128,7 +128,7 @@ static int rt_numa_numa_node_of_cpu(int cpu)
        int max_node, max_cpus;
 
        max_node = numa_max_node();
-       max_cpus = sysconf(_SC_NPROCESSORS_CONF);
+       max_cpus = sysconf(_SC_NPROCESSORS_ONLN);
 
        if (cpu > max_cpus) {
                errno = EINVAL;

--

   Joakim