The main thread will interfere with the test thread and try not to share
the same CPU with the main thread when the number of thread is less than
max_cpus.
Signed-off-by: yeyunfeng <yeyunfeng@xxxxxxxxxx>
---
src/cyclictest/cyclictest.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/cyclictest/cyclictest.c b/src/cyclictest/cyclictest.c
index 989113fb3483..b3d72caa10ce 100644
--- a/src/cyclictest/cyclictest.c
+++ b/src/cyclictest/cyclictest.c
@@ -1080,7 +1080,8 @@ static int cpu_for_thread_sp(int thread_num, int max_cpus)
fatal("No allowable cpus to run on\n");
}
- m = thread_num % num_cpus;
+ /* just don't try to share the same cpu with main thread */
+ m = (thread_num + 1) % num_cpus;
/* there are num_cpus bits set, we want position of m'th one */
for (i = 0, cpu = 0; i < max_cpus; i++) {
--
1.8.3.1
