Extrapolating on the exisitng framework to track rt/dl utilization using pelt signals, add a similar mechanism to track thermal pressue. The difference here from rt/dl utilization tracking is that, instead of tracking time spent by a cpu running a rt/dl task through util_avg, the average thermal pressure is tracked through load_avg. In order to track average thermal pressure, a new sched_avg variable avg_thermal is introduced. Function update_thermal_avg can be called to do the periodic bookeeping (accumulate, decay and average) of the thermal pressure.
Signed-off-by: Thara Gopinath <[email protected]> --- kernel/sched/pelt.c | 14 ++++++++++++++ kernel/sched/pelt.h | 7 +++++++ kernel/sched/sched.h | 1 + 3 files changed, 22 insertions(+) diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c index 05b8798..7034ede 100644 --- a/kernel/sched/pelt.c +++ b/kernel/sched/pelt.c @@ -362,6 +362,20 @@ int update_dl_rq_load_avg(u64 now, struct rq *rq, int running) return 0; } +int update_thermal_avg(u64 now, struct rq *rq, u64 capacity) +{ + if (___update_load_sum(now, rq->cpu, &rq->avg_thermal, + capacity, + capacity, + capacity, 0)) { + + ___update_load_avg(&rq->avg_thermal, 1, 1); + return 1; + } + + return 0; +} + #if defined(CONFIG_IRQ_TIME_ACCOUNTING) || defined(CONFIG_PARAVIRT_TIME_ACCOUNTING) /* * irq: diff --git a/kernel/sched/pelt.h b/kernel/sched/pelt.h index d2894db..cc5a3ad 100644 --- a/kernel/sched/pelt.h +++ b/kernel/sched/pelt.h @@ -5,6 +5,7 @@ int __update_load_avg_se(u64 now, int cpu, struct cfs_rq *cfs_rq, struct sched_e int __update_load_avg_cfs_rq(u64 now, int cpu, struct cfs_rq *cfs_rq); int update_rt_rq_load_avg(u64 now, struct rq *rq, int running); int update_dl_rq_load_avg(u64 now, struct rq *rq, int running); +int update_thermal_avg(u64 now, struct rq *rq, u64 capacity); #if defined(CONFIG_IRQ_TIME_ACCOUNTING) || defined(CONFIG_PARAVIRT_TIME_ACCOUNTING) int update_irq_load_avg(struct rq *rq, u64 running); @@ -67,6 +68,12 @@ update_irq_load_avg(struct rq *rq, u64 running) { return 0; } + +static inline int +update_thermal_avg(u64 now, struct rq *rq, u64 capacity) +{ + return 0; +} #endif diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 4a2e8ca..30b40a5 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -859,6 +859,7 @@ struct rq { #define HAVE_SCHED_AVG_IRQ struct sched_avg avg_irq; #endif + struct sched_avg avg_thermal; u64 idle_stamp; u64 avg_idle; -- 2.1.4
