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| author | Chengming Zhou <[email protected]> | 2022-08-25 16:41:10 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2022-09-09 09:08:33 +0000 |
| commit | dc86aba751e2867244411adda1562f6664747019 (patch) | |
| tree | a3da212be6c190b5585ee4f9761c4177ad4f19c6 /drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | |
| parent | sched/psi: Consolidate cgroup_psi() (diff) | |
| download | kernel-dc86aba751e2867244411adda1562f6664747019.tar.gz kernel-dc86aba751e2867244411adda1562f6664747019.zip | |
sched/psi: Cache parent psi_group to speed up group iteration
We use iterate_groups() to iterate each level psi_group to update
PSI stats, which is a very hot path.
In current code, iterate_groups() have to use multiple branches and
cgroup_parent() to get parent psi_group for each level, which is not
very efficient.
This patch cache parent psi_group in struct psi_group, only need to get
psi_group of task itself first, then just use group->parent to iterate.
Signed-off-by: Chengming Zhou <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c')
0 files changed, 0 insertions, 0 deletions