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From: Sumera Priyadarsini <sylphrenadin@gmail.com>
To: Julia.Lawall@lip6.fr
Cc: michal.lkml@markovi.net, linux-doc@vger.kernel.org,
	Gilles.Muller@lip6.fr, corbet@lwn.net, nicolas.palix@imag.fr,
	linux-kernel@vger.kernel.org, cocci@systeme.lip6.fr
Subject: [Cocci] [PATCH v4 2/3] scripts: coccicheck: Change default condition for parallelism
Date: Sun, 11 Oct 2020 15:59:42 +0530
Message-ID: <13de95fe3959459ac9ae8c74d99eb7e3c5702a2d.1602410019.git.sylphrenadin@gmail.com> (raw)
In-Reply-To: <cover.1602410019.git.sylphrenadin@gmail.com>

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>
---
 scripts/coccicheck | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/coccicheck b/scripts/coccicheck
index d67907b8a38b..209bb0427b43 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -79,7 +79,7 @@ else
     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
-- 
2.25.1

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  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-11 10:26 [Cocci] [PATCH v4 0/3] Improve Coccinelle Parallelisation Sumera Priyadarsini
2020-10-11 10:28 ` [Cocci] [PATCH v4 1/3] scripts: coccicheck: Add quotes to improve portability Sumera Priyadarsini
2020-10-12  8:38   ` Julia Lawall
2020-10-11 10:29 ` Sumera Priyadarsini [this message]
2020-10-12  8:38   ` [Cocci] [PATCH v4 2/3] scripts: coccicheck: Change default condition for parallelism Julia Lawall
2020-10-11 10:31 ` [Cocci] [PATCH v4 3/3] Documentation: Coccinelle: Modify Parallelisation information in docs Sumera Priyadarsini
2020-10-12  8:39   ` Julia Lawall

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