From d24fa09b58b4b8b78007cb41200bc144c3f7a03b Mon Sep 17 00:00:00 2001 From: Kenneth Hoste Date: Wed, 27 Sep 2023 11:29:52 +0200 Subject: [PATCH] implement hook to limit parallellism to half the available cores for software that requires a lot of memory during the build/test, like TensorFlow --- eb_hooks.py | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/eb_hooks.py b/eb_hooks.py index 488e53d929..0e80ba5b3e 100644 --- a/eb_hooks.py +++ b/eb_hooks.py @@ -63,6 +63,21 @@ def parse_hook(ec, *args, **kwargs): PARSE_HOOKS[ec.name](ec, eprefix) +def post_ready_hook(self, *args, **kwargs): + """ + Post-ready hook: limit parallellism for selected builds, because they require a lot of memory per used core. + """ + # 'parallel' easyconfig parameter is set via EasyBlock.set_parallel in ready step based on available cores. + # here we reduce parallellism to only use half of that for selected software, + # to avoid failing builds/tests due to out-of-memory problems + if self.name in ['TensorFlow']: + parallel = self.cfg['parallel'] + if parallel > 1: + self.cfg['parallel'] = parallel // 2 + msg = "limiting parallelism to %s (was %s) for %s to avoid out-of-memory failures during building/testing" + print_msg(msg % (self.cfg['parallel'], parallel, self.name), log=self.log) + + def pre_prepare_hook(self, *args, **kwargs): """Main pre-prepare hook: trigger custom functions."""