diff options
| author | Tim Chen <[email protected]> | 2023-09-07 10:42:21 -0700 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2023-09-13 15:03:06 +0200 |
| commit | 450e749707bc1755f22b505d9cd942d4869dc535 (patch) | |
| tree | c5bba96bc95d14a8679acc9fd1420e595a525e30 /tools/testing/selftests/bpf/prog_tests/async_stack_depth.c | |
| parent | f8858d96061f5942216c6abb0194c3ea7b78e1e8 (diff) | |
sched/fair: Fix SMT4 group_smt_balance handling
For SMT4, any group with more than 2 tasks will be marked as
group_smt_balance. Retain the behaviour of group_has_spare by marking
the busiest group as the group which has the least number of idle_cpus.
Also, handle rounding effect of adding (ncores_local + ncores_busy) when
the local is fully idle and busy group imbalance is less than 2 tasks.
Local group should try to pull at least 1 task in this case so imbalance
should be set to 2 instead.
Fixes: fee1759e4f04 ("sched/fair: Determine active load balance for SMT sched groups")
Acked-by: Shrikanth Hegde <[email protected]>
Signed-off-by: Tim Chen <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/async_stack_depth.c')
0 files changed, 0 insertions, 0 deletions