1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*  cpufreq-bench CPUFreq microbenchmark
17 if (config->output != stdout) {				\
37 	unsigned int rounds = 0;  in calculate_timespace()
38 	unsigned int timed = 0;  in calculate_timespace()
40 	if (config->verbose)  in calculate_timespace()
48 	timed = (unsigned int)(then - now);  in calculate_timespace()
52 	for (i = 0; i < 4; i++) {  in calculate_timespace()
59 		timed = (unsigned int)(then - now);  in calculate_timespace()
62 	if (config->verbose)  in calculate_timespace()
80 	unsigned int _round, cycle;  in start_benchmark()  local
82 	long sleep_time = 0, load_time = 0;  in start_benchmark()
83 	long performance_time = 0, powersave_time = 0;  in start_benchmark()
85 	unsigned long total_time = 0, progress_time = 0;  in start_benchmark()
87 	sleep_time = config->sleep;  in start_benchmark()
88 	load_time = config->load;  in start_benchmark()
91 	for (_round = 1; _round <= config->rounds; _round++)  in start_benchmark()
92 		total_time += _round * (config->sleep + config->load);  in start_benchmark()
95 	for (_round = 0; _round < config->rounds; _round++) {  in start_benchmark()
96 		performance_time = 0LL;  in start_benchmark()
97 		powersave_time = 0LL;  in start_benchmark()
102 		 * P-State switching. */  in start_benchmark()
103 		if (set_cpufreq_governor("performance", config->cpu) != 0)  in start_benchmark()
111 		if (config->verbose)  in start_benchmark()
113 			       " for %lius\n", _round + 1, config->cycles,  in start_benchmark()
116 		fprintf(config->output, "%u %li %li ",  in start_benchmark()
119 		if (config->verbose)  in start_benchmark()
125 		for (cycle = 0; cycle < config->cycles; cycle++) {  in start_benchmark()
130 			performance_time += then - now - sleep_time;  in start_benchmark()
131 			if (config->verbose)  in start_benchmark()
132 				printf("performance cycle took %lius, "  in start_benchmark()
135 					(long)(then - now), sleep_time,  in start_benchmark()
138 		fprintf(config->output, "%li ",  in start_benchmark()
139 			performance_time / config->cycles);  in start_benchmark()
144 		/* set the powersave governor which activates P-State switching  in start_benchmark()
146 		if (set_cpufreq_governor(config->governor, config->cpu) != 0)  in start_benchmark()
151 		for (cycle = 0; cycle < config->cycles; cycle++) {  in start_benchmark()
156 			powersave_time += then - now - sleep_time;  in start_benchmark()
157 			if (config->verbose)  in start_benchmark()
158 				printf("powersave cycle took %lius, "  in start_benchmark()
161 					(long)(then - now), sleep_time,  in start_benchmark()
168 		fprintf(config->output, "%li ",  in start_benchmark()
169 			powersave_time / config->cycles);  in start_benchmark()
170 		fprintf(config->output, "%.3f\n",  in start_benchmark()
172 		fflush(config->output);  in start_benchmark()
174 		if (config->verbose)  in start_benchmark()
178 		sleep_time += config->sleep_step;  in start_benchmark()
179 		load_time += config->load_step;  in start_benchmark()