include/litmus/gpu_affinity.h


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#ifndef LITMUS_GPU_AFFINITY_H
#define LITMUS_GPU_AFFINITY_H

#include <litmus/rt_param.h>
#include <litmus/sched_plugin.h>
#include <litmus/litmus.h>

void update_gpu_estimate(struct task_struct* t, lt_t observed);
gpu_migration_dist_t gpu_migration_distance(int a, int b);

static inline void reset_gpu_tracker(struct task_struct* t)
{
	t->rt_param.accum_gpu_time = 0;
}

static inline void start_gpu_tracker(struct task_struct* t)
{
	t->rt_param.gpu_time_stamp = litmus_clock();
}

static inline void stop_gpu_tracker(struct task_struct* t)
{
	lt_t now = litmus_clock();
	t->rt_param.accum_gpu_time += (now - t->rt_param.gpu_time_stamp);
}

static inline lt_t get_gpu_time(struct task_struct* t)
{
	return t->rt_param.accum_gpu_time;
}

static inline lt_t get_gpu_estimate(struct task_struct* t, gpu_migration_dist_t dist)
{
	lt_t val = 0;

	switch(t->rt_param.prediction_mode) {
		case SIMPLE_AVG:
		case CC_BRUTE_AVG:
		case CC_MR_AVG:
			val = t->rt_param.gpu_avg_est[dist].center_line;
			break;
		case SIMPLE_EWMA:
		case CC_BRUTE_EWMA:
		case CC_MR_EWMA:
			val = t->rt_param.gpu_ewma_est[dist].center_line;
			break;
	}

	return ((val > 0) ? val : dist+1);
}

#endif