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Commit 2c320f2f authored by Olav Haugan's avatar Olav Haugan
Browse files

sched: Add temperature to cpu_load trace point 



Add the current CPU temperature to the sched_cpu_load trace point.
This will allow us to track the CPU temperature.

CRs-Fixed: 764788
Change-Id: Ib2e3559bbbe3fe07a6b7c8115db606828bc36254
Signed-off-by: default avatarOlav Haugan <ohaugan@codeaurora.org>
parent 0c0d18bb

Documentation/scheduler/sched-hmp.txt

+2 −1
Original line number Diff line number Diff line
@@ -1321,7 +1321,7 @@ Logged when selecting the best CPU to run a task (select_best_cpu() for fair 
class tasks, find_lowest_rq_hmp() for RT tasks) and load balancing

(update_sg_lb_stats()).



<idle>-0     [004] d.h3 12700.711541: sched_cpu_load: cpu 0 idle 1 mostly_idle 1 nr_run 0 nr_big 0 nr_small 0 lsf 1945 capacity 1045 cr_avg 0 irqload 4456 fcur 199200 fmax 940800 power_cost 1045 cstate 1

<idle>-0     [004] d.h3 12700.711541: sched_cpu_load: cpu 0 idle 1 mostly_idle 1 nr_run 0 nr_big 0 nr_small 0 lsf 1945 capacity 1045 cr_avg 0 irqload 4456 fcur 199200 fmax 940800 power_cost 1045 cstate 1 temp 73



- cpu: the CPU being described

- idle: boolean indicating whether the CPU is idle
@@ -1339,6 +1339,7 @@ class tasks, find_lowest_rq_hmp() for RT tasks) and load balancing 
- fmax: max CPU frequency (but not maximum _possible_ frequency) (KHz)

- power_cost: cost of running this CPU at the current frequency

- cstate: current cstate of CPU

- temp: current temperature of the CPU



The power_cost value above differs in how it is calculated depending on the

callsite of this tracepoint. The select_best_cpu() call to this tracepoint

include/trace/events/sched.h

+6 −4
Original line number Diff line number Diff line
@@ -159,9 +159,9 @@ TRACE_EVENT(sched_task_load, 
TRACE_EVENT(sched_cpu_load,



	TP_PROTO(struct rq *rq, int idle, int mostly_idle, u64 irqload,

		 unsigned int power_cost),

		 unsigned int power_cost, int temp),



	TP_ARGS(rq, idle, mostly_idle, irqload, power_cost),

	TP_ARGS(rq, idle, mostly_idle, irqload, power_cost, temp),



	TP_STRUCT__entry(

		__field(unsigned int, cpu			)
@@ -178,6 +178,7 @@ TRACE_EVENT(sched_cpu_load, 
		__field(unsigned int, max_freq			)

		__field(unsigned int, power_cost		)

		__field(	 int, cstate			)

		__field(	 int, temp			)

	),



	TP_fast_assign(
@@ -195,15 +196,16 @@ TRACE_EVENT(sched_cpu_load, 
		__entry->max_freq		= rq->max_freq;

		__entry->power_cost		= power_cost;

		__entry->cstate			= rq->cstate;

		__entry->temp			= temp;

	),



	TP_printk("cpu %u idle %d mostly_idle %d nr_run %u nr_big %u nr_small %u lsf %u capacity %u cr_avg %llu irqload %llu fcur %u fmax %u power_cost %u cstate %d",

	TP_printk("cpu %u idle %d mostly_idle %d nr_run %u nr_big %u nr_small %u lsf %u capacity %u cr_avg %llu irqload %llu fcur %u fmax %u power_cost %u cstate %d temp %d",

	__entry->cpu, __entry->idle, __entry->mostly_idle, __entry->nr_running,

	__entry->nr_big_tasks, __entry->nr_small_tasks,

	__entry->load_scale_factor, __entry->capacity,

	__entry->cumulative_runnable_avg, __entry->irqload,

	__entry->cur_freq, __entry->max_freq,

	__entry->power_cost, __entry->cstate)

	__entry->power_cost, __entry->cstate, __entry->temp)

);



TRACE_EVENT(sched_set_boost,

kernel/sched/fair.c

+22 −3
Original line number Diff line number Diff line
@@ -1775,7 +1775,8 @@ static int best_small_task_cpu(struct task_struct *p, int sync) 


		trace_sched_cpu_load(cpu_rq(i), idle_cpu(i),

				     mostly_idle_cpu_sync(i, sync),

				     sched_irqload(i), power_cost(p, i));

				     sched_irqload(i), power_cost(p, i),

				     cpu_temp(i));



		cpu_cost = power_cost(p, i);

		if (cpu_cost < min_cost) {
@@ -1930,7 +1931,8 @@ static int select_best_cpu(struct task_struct *p, int target, int reason, 


		trace_sched_cpu_load(cpu_rq(i), idle_cpu(i),

				     mostly_idle_cpu_sync(i, sync),

				     sched_irqload(i), power_cost(p, i));

				     sched_irqload(i), power_cost(p, i),

				     cpu_temp(i));



		if (skip_cpu(p, i, reason))

			continue;
@@ -2416,6 +2418,16 @@ static inline int is_cpu_throttling_imminent(int cpu) 
	return throttling;

}



unsigned int cpu_temp(int cpu)

{

	struct cpu_pwr_stats *per_cpu_info = get_cpu_pwr_stats();

	if (per_cpu_info)

		return per_cpu_info[cpu].temp;

	else

		return 0;

}





#else	/* CONFIG_SCHED_HMP */



#define sched_enable_power_aware 0
@@ -2477,6 +2489,12 @@ static inline int is_cpu_throttling_imminent(int cpu) 
	return 0;

}



unsigned int cpu_temp(int cpu)

{

	return 0;

}





#endif	/* CONFIG_SCHED_HMP */



#ifdef CONFIG_SCHED_HMP
@@ -5977,7 +5995,8 @@ static inline void update_sg_lb_stats(struct lb_env *env, 
		trace_sched_cpu_load(cpu_rq(i), idle_cpu(i),

				     mostly_idle_cpu(i),

				     sched_irqload(i),

				     power_cost_at_freq(i, 0));

				     power_cost_at_freq(i, 0),

				     cpu_temp(i));

		nr_running = rq->nr_running;



		/* Bias balancing toward cpus of our domain */

kernel/sched/rt.c

+1 −1
Original line number Diff line number Diff line
@@ -1555,7 +1555,7 @@ static int find_lowest_rq_hmp(struct task_struct *task) 
		struct rq *rq = cpu_rq(i);

		cpu_cost = power_cost_at_freq(i, ACCESS_ONCE(rq->min_freq));

		trace_sched_cpu_load(rq, idle_cpu(i), mostly_idle_cpu(i),

				     sched_irqload(i), cpu_cost);

				     sched_irqload(i), cpu_cost, cpu_temp(i));



		if (sched_boost() && capacity(rq) != max_capacity)

			continue;

kernel/sched/sched.h

+1 −0
Original line number Diff line number Diff line
@@ -734,6 +734,7 @@ u64 scale_load_to_cpu(u64 load, int cpu); 
unsigned int max_task_load(void);

extern void sched_account_irqtime(int cpu, struct task_struct *curr,

				 u64 delta, u64 wallclock);

unsigned int cpu_temp(int cpu);



static inline int capacity(struct rq *rq)

{