On Wed, Jun 05, 2019 at 03:08:58PM -0400, Chuck Atkins via cfarm-users wrote: > It could be also that you're hitting thread migration across cores, thus > missing out on the clock ramp up. I saw quite a few issues with that on > the p8 running benchmarks a while back. If that's the case then you can > try to pin your benchmark to a single cpu core (or a set of them if youd > like) by running it under "numactl -C <CORE_NUMBER> ./benchmark"
We run the systems in conservative mode. They are not optimised for benchmarks. You'll get useless results from them anyway, except maybe for trivial things you "benchmark" for development. Segher _______________________________________________ cfarm-users mailing list cfarm-users@lists.tetaneutral.net https://lists.tetaneutral.net/listinfo/cfarm-users
