jenkins.sh: Reduce parallelist of builds in Cambirdge lab

... to try workaround sanitizer testsuite instabilities and races.
Note that the Hetzner builders have been renamed tcwg-ex40-XX -> ex40-XX,
so the old stanza is no longer applicable.  Also the change will only
affect the 32-core builders, and the old 4-core builders will remain at -j4
parallelism.

Change-Id: Ie7c1ef6a3d89264e5fbad5e06520c20d8582baee

1 files changed, 4 insertions, 3 deletions

diff --git a/jenkins.sh b/jenkins.sh
index cc9b27ab..89bf123c 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -305,10 +305,11 @@ fi
 
 $CONFIG_SHELL ${abe_dir}/configure --with-local-snapshots=${user_snapshots} --with-git-reference-dir=${git_reference} --with-languages=${languages} --enable-schroot-test --with-fileserver=${fileserver}
 
-# Double parallelism for tcwg-ex40-* machines to compensate for really-remote
-# target execution.  GCC testsuites will run with -j 32.
+# Reduce parallelism of individual builds in Cambridge lab to try reduce
+# variability in sanitizer testsuite.
+# Note that GCC testsuites will run with double parallelism setting.
 case "$(hostname)" in
-    "tcwg-ex40-"*) sed -i -e "s/cpus=8/cpus=16/" host.conf ;;
+    "build-"*) sed -i -e "s/cpus=32/cpus=8/" host.conf ;;
 esac
 
 # load commonly used varibles set by configure