Hi, Please review this backport of a reliability fix for running tests. Currently on certain machines where num_cores/2 > mem_in_gb/2 there is a risk of tests failing due to memory issues. JTREG's -concurrency setting will currently be num_cures/2 and the available memory for this might not be sufficient to run the tests.
The JDK 12 patch didn't apply cleanly due to some whitespace/context differences and a difference in argument's numbers in RunTestsPrebuilt.gmk (due to jcov work not present in JDK 11. i.e. JDK- 8217761 and friends). The patch had to be done manually. This patch depends on the backport for JDK-8211727 here: http://mail.openjdk.java.net/pipermail/jdk-updates-dev/2019-August/001747.html Bug: https://bugs.openjdk.java.net/browse/JDK-8214003 webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8214003/jdk11/01/webrev/ original changeset: http://hg.openjdk.java.net/jdk/jdk/rev/8c887dcd5d90 Testing: tier1 on Linux x86_64. Smoke tested "make run-test-prebuilt". I didn't have access to a specific system which matches the conditions for this bug to surface, though. Appreciate any testers. Thoughts? Thanks, Severin
