------- Comment From [email protected] 2017-09-11 15:49 EDT------- Thanks, I was able to make perf work by uninstalling the "linux-tools-common" test .deb and installing the stock version.
This test build resolves the problem by significantly reducing sched migrations in the under utilized case which improves performance by 30-40% for this ebizzy testcase: stock kernel (4.10.0-33-generic) : 6,010 sched:sched_migrate_task test kernel (4.10.0-33-generic #37~lp1713576) : 676 sched:sched_migrate_task Testcase was: perf stat -a -r 5 -e sched:sched_migrate_task ./ebizzy -t 35 -S 100 where ebizzy was using 35 threads on a system w/ 128 logical cpus total -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1713576 Title: More migrations with constant load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1713576/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
