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ANDROID: GKI: enable CONFIG_FAIR_GROUP_SCHED

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Enable CONFIG_FAIR_GROUP_SCHED with proper tuning can help prioritize
important work in Android. The feature was taken off due to improper
setting on the background tasks' share. Now Tasks in root group has
already moved into a newly created system subgroup, so the shares can be
properly set.

+----------------------------------------------------------------------------------------+
| Cold App Launch Time (* w/ prio120 8 threads running in root cpuset)                   |
+----------------------------------------+--------+------+---------+-----------+---------+
|                                        | chrome | maps | youtube | playstore | setting |
+----------------------------------------+--------+------+---------+-----------+---------+
| No CONFIG_FAIR_GROUP_SCHED support(*)  |    591 | 1314 |     887 |      1952 |     551 |
+----------------------------------------+--------+------+---------+-----------+---------+
| CONFIG_FAIR_GROUP_SCHED w/ 1% limit(*) |    567 |  637 |     668 |      1450 |     529 |
+----------------------------------------+--------+------+---------+-----------+---------+
| No stress runnning (best case)         |    416 |  463 |     484 |      1075 |     363 |
+----------------------------------------+--------+------+---------+-----------+---------+

Bug: 171740453
Test: Build and boot
Signed-off-by: Wei Wang <wvw@google.com>
Change-Id: Ibb7e48c93136e3967da6381d7c0c94d0cdaee443
This commit is contained in:
Wei Wang 2020-10-26 15:26:48 -07:00
parent c1c7252f19
commit f08f049de1
2 changed files with 0 additions and 2 deletions
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1
arch/arm64/configs/gki_defconfig
View File

@ -16,7 +16,6 @@ CONFIG_UCLAMP_TASK=y
CONFIG_CGROUPS=y
CONFIG_BLK_CGROUP=y
CONFIG_CGROUP_SCHED=y
# CONFIG_FAIR_GROUP_SCHED is not set
CONFIG_UCLAMP_TASK_GROUP=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CPUSETS=y

1
arch/x86/configs/gki_defconfig
View File

@ -18,7 +18,6 @@ CONFIG_UCLAMP_TASK=y
CONFIG_CGROUPS=y
CONFIG_BLK_CGROUP=y
CONFIG_CGROUP_SCHED=y
# CONFIG_FAIR_GROUP_SCHED is not set
CONFIG_UCLAMP_TASK_GROUP=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CPUSETS=y