Add tasks' load accountings and statistics. #216

hamadmarri · 2021-11-14T13:00:18Z

Changes:

Tasks' load accountings and statistics are ported from CFS.
Fixed incorrect behavior of some governor scaling such as ondemand and schedutil
TASK_UCLAMP is enabled if TT_ACCOUNTING_STATS
Make child run first (before parent) in fork
Removed all Hz changes which are now in separate patch
Initial work to Yield fix hamadmarri/TT-CPU-Scheduler#6
Add sysctl to soften RT task priority
Ported CFS is cache hot code during can_migrate_task to
avoid migrate cache hot tasks. This also includes numa locality
checks.

It can be switched back to parent run first via sysctl `sysctl kernel.sched_child_runs_first=0`

in a separate patch (high-hz.patch).

and task_dead.

update_curr, set_next_task, put_prev_task, and others.

of every tick.

`YIELD_MARK` only applies if `cfs_rq->h_nr_running > 1` `YIELD_UNMARK` on migrate_task

kernel.sched_tt_rt_prio default value = -20

avoid migrate cache hot tasks. This also includes numa locality checks.

hamadmarri added 11 commits November 14, 2021 15:46

Make child runs first in fork by default.

9890117

It can be switched back to parent run first via sysctl `sysctl kernel.sched_child_runs_first=0`

revert adding hz values to Kconfig.hz since now the Hz work is

4f2d5fc

in a separate patch (high-hz.patch).

Added tasks load accountings and statistics.

bdf7933

fix when enabling CONFIG_NUMA_BALANCING

84b7636

Add missing load update in couple functions: trigger_loadbalancer

0e451ef

and task_dead.

Forgot to update load in the most important functions :D

0bf382e

update_curr, set_next_task, put_prev_task, and others.

update_blocked_averages in trigger_loadbalancer every 19ms instead

da59d0d

of every tick.

Initial work to hamadmarri/TT-CPU-Scheduler#6

11c50e2

`YIELD_MARK` only applies if `cfs_rq->h_nr_running > 1` `YIELD_UNMARK` on migrate_task

Add sysctl to soften RT task priority

9dd12e1

kernel.sched_tt_rt_prio default value = -20

Ported CFS is cache hot code during can_migrate_task to

db58800

avoid migrate cache hot tasks. This also includes numa locality checks.

fixed typos

edabdb8

xanmod merged commit dd477c4 into xanmod:5.15-tt Nov 18, 2021

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Add tasks' load accountings and statistics. #216

Add tasks' load accountings and statistics. #216

hamadmarri commented Nov 14, 2021 •

edited

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Add tasks' load accountings and statistics. #216

Add tasks' load accountings and statistics. #216

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hamadmarri commented Nov 14, 2021 • edited Loading

hamadmarri commented Nov 14, 2021 •

edited

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