From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 26 Feb 2021 18:17:03 +0000 (+0000)
Subject: make.sh: Set parallelism to number of CPU cores
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6cd453ff17f5b5560017d2ea6be629b0f581c1ae;p=people%2Fms%2Fipfire-2.x.git

make.sh: Set parallelism to number of CPU cores

Setting it to something higher than the number of physical CPU cores was
a good idea when we used to have slow magnetic storage. That way, at
least there was always one process waiting for IO.

With modern fast flash-based storage, this does not hold any more since
it is fast enough that we don't need to have a couple of processes ready
to wait.

It will probably have made work for the scheduler more challenging since
more processes were ready and processes were moved around processors.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/make.sh b/make.sh
index f75e592c3a..48615256d1 100755
--- a/make.sh
+++ b/make.sh
@@ -141,7 +141,7 @@ configure_build() {
 	# 128MB of memory. Therefore we find out how
 	# many processes fit into memory.
 	local mem_max=$(( ${SYSTEM_MEMORY} / 128 ))
-	local cpu_max=$(( ${SYSTEM_PROCESSORS} + 1 ))
+	local cpu_max=$(( ${SYSTEM_PROCESSORS} ))
 
 	local parallelism
 	if [ ${mem_max} -lt ${cpu_max} ]; then