Messages in this thread |  | | From | Valentin Schneider <> | Subject | [PATCH v2 0/4] sched/fair: Task placement biasing using uclamp | Date | Tue, 3 Dec 2019 15:59:03 +0000 |
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Hi,
While uclamp restrictions currently only impacts schedutil's frequency selection, it would make sense to also let it impact CPU selection in asymmetric topologies. This would let us steer specific tasks towards certain CPU capacities regardless of their actual utilization - I give a few examples in patch 3.
The first two patches are just cleanups/renames, the meat of the thing is in patches 3 and 4.
Note that this is in the same spirit as what Patrick had proposed for EAS on Android [1]
[1]: https://android.googlesource.com/kernel/common/+/b61876ed122f816660fe49e0de1b7ee4891deaa2%5E%21
Revisions =========
Changed in v2:
- Collect Reviewed-by
- Make uclamp_task_util() unconditionally use util_est (Quentin) - Because of the above, move uclamp_task_util() to fair.c
- Split v1's 3/3 into - task_fits_capacity() tweak (v2's 3/4) - find_energy_efficient_cpu() tweak (v2's 4/4).
Cheers, Valentin
Valentin Schneider (4): sched/uclamp: Make uclamp_util_*() helpers use and return UL values sched/uclamp: Rename uclamp_util_*() into uclamp_rq_util_*() sched/fair: Make task_fits_capacity() consider uclamp restrictions sched/fair: Make feec() consider uclamp restrictions
kernel/sched/cpufreq_schedutil.c | 2 +- kernel/sched/fair.c | 30 +++++++++++++++++++++++++++--- kernel/sched/sched.h | 22 +++++++++++----------- 3 files changed, 39 insertions(+), 15 deletions(-)
-- 2.24.0
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