From: Pedro Tammela Date: Fri, 17 Nov 2023 17:12:03 +0000 (-0300) Subject: selftests: tc-testing: cap parallel tdc to 4 cores X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=025de7b6a6dd44e78d0d45b4f3b4f104ed54b0fd;p=linux.git selftests: tc-testing: cap parallel tdc to 4 cores We have observed a lot of lock contention and test instability when running with >8 cores. Enough to actually make the tests run slower than with fewer cores. Cap the maximum cores of parallel tdc to 4 which showed in testing to be a reasonable number for efficiency and stability in different kernel config scenarios. Signed-off-by: Pedro Tammela Reviewed-by: Simon Horman Acked-by: Jamal Hadi Salim Link: https://lore.kernel.org/r/20231117171208.2066136-2-pctammela@mojatatu.com Signed-off-by: Jakub Kicinski --- diff --git a/tools/testing/selftests/tc-testing/tdc.py b/tools/testing/selftests/tc-testing/tdc.py index a6718192aff3b..f764b43f112b6 100755 --- a/tools/testing/selftests/tc-testing/tdc.py +++ b/tools/testing/selftests/tc-testing/tdc.py @@ -1017,6 +1017,7 @@ def main(): parser = pm.call_add_args(parser) (args, remaining) = parser.parse_known_args() args.NAMES = NAMES + args.mp = min(args.mp, 4) pm.set_args(args) check_default_settings(args, remaining, pm) if args.verbose > 2: