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From: Sumera Priyadarsini <>
Subject: [Cocci] [PATCH 2/2 V3] Documentation: Coccinelle: Modify parallelisation information in docs
Date: Wed, 7 Oct 2020 13:52:53 +0530
Message-ID: <> (raw)
In-Reply-To: <>

This patchset modifies coccicheck to use at most one thread per core by
default in machines with more than 4 hyperthreads for optimal performance.
Modify documentation in coccinelle.rst to reflect the same.

Signed-off-by: Sumera Priyadarsini <>
Changes in V2:
	Update scripts/coccicheck to use all available threads
	in machines with upto 4 hyperthreads.
 Documentation/dev-tools/coccinelle.rst | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/dev-tools/coccinelle.rst b/Documentation/dev-tools/coccinelle.rst
index 74c5e6aeeff5..6fdc462689d5 100644
--- a/Documentation/dev-tools/coccinelle.rst
+++ b/Documentation/dev-tools/coccinelle.rst
@@ -130,8 +130,9 @@ To enable verbose messages set the V= variable, for example::
 Coccinelle parallelization
-By default, coccicheck tries to run as parallel as possible. To change
-the parallelism, set the J= variable. For example, to run across 4 CPUs::
+By default, coccicheck uses at most 1 thread per core in a machine with more
+than 4 hyperthreads. In a machine with upto 4 threads, all threads are used.
+To change the parallelism, set the J= variable. For example, to run across 4 CPUs::
    make coccicheck MODE=report J=4

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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-07  8:14 [Cocci] [PATCH 0/2 V3] Improve Coccinelle Parallelisation Sumera Priyadarsini
2020-10-07  8:21 ` [Cocci] [PATCH 1/2 V3] scripts: coccicheck: Change default value for parallelism Sumera Priyadarsini
2020-10-07  8:22 ` Sumera Priyadarsini [this message]

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