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scripts: coccicheck: Change default condition for parallelism

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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>
This commit is contained in:
Sumera Priyadarsini 2020-10-11 15:59:42 +05:30 committed by Julia Lawall
parent 2f324dd8ab
commit c5864560d9
1 changed files with 1 additions and 1 deletions
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scripts/coccicheck
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@ -79,7 +79,7 @@ else
THREADS_PER_CORE=$(lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]") THREADS_PER_CORE=$(lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]")
if [ -z "$J" ]; then if [ -z "$J" ]; then
NPROC=$(getconf _NPROCESSORS_ONLN) NPROC=$(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)) NPROC=$((NPROC/2))
fi fi
else else