Messages in this thread | | | From | Atul Pant <> | Subject | [RFC PATCH 0/2] Disable RT-throttling for idle-inject threads | Date | Wed, 10 Apr 2024 10:24:15 +0530 |
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We are trying to implement a solution for thermal mitigation by using idle injection on CPUs. However we face some limitations with the current idle-inject framework. As per our need, we want to start injecting idle cycles on a cpu for indefinite time (until the temperature/power of the CPU falls below a threshold). This will allow to keep the hot CPUs in the sleep state until we see improvement in temperature/power. If we set idle duration to a large value or have an idle-injection ratio of 100%, then the idle-inject RT thread suffers from RT throttling. This results in the CPU exiting from the sleep state and consume some power.
To solve this limitation, we propose a solution to disable RT-throttling whenever idle-inject threads run. We achieve this by not accounting the runtime for the idle-inject threads.
Atul Pant (2): sched/rt: Disable runtime accounting for idle threads with SCHED_FIFO policy sched/idle: Add a description for play_idle_precise
kernel/sched/idle.c | 5 +++++ kernel/sched/rt.c | 4 +++- 2 files changed, 8 insertions(+), 1 deletion(-)
-- 2.25.1
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