commit c5864560d935db879cafa21feca0156d91eba842
author Sumera Priyadarsini <sylphrenadin@gmail.com> Sun Oct 11 15:59:42 2020 +0530
committer Julia Lawall <Julia.Lawall@lip6.fr> Mon Oct 12 10:37:56 2020 +0200
tree 333a8061c885f324a4fc6e54aaf42c6d9bd0ec28
parent 2f324dd8ab2e3d8b097f3eac6d380d1adbdbe6e6

scripts: coccicheck: Change default condition for parallelism

Currently, Coccinelle uses at most one thread per core by default in
machines with more than 2 hyperthreads. However, for systems with only 4
hyperthreads, this does not improve performance.

Modify coccicheck to use all available threads in machines with
upto 4 hyperthreads.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

scripts/coccicheck

diff --git a/scripts/coccicheck b/scripts/coccicheck
index d67907b..209bb04 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -79,7 +79,7 @@
     THREADS_PER_CORE=$(lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]")
     if [ -z "$J" ]; then
         NPROC=$(getconf _NPROCESSORS_ONLN)
-	if [ $THREADS_PER_CORE -gt 1 -a $NPROC -gt 2 ] ; then
+	if [ $THREADS_PER_CORE -gt 1 -a $NPROC -gt 4 ] ; then
 		NPROC=$((NPROC/2))
 	fi
     else