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20#include <stdio.h>
21#include <unistd.h>
22#include <math.h>
23
24#include "config.h"
25#include "system.h"
26#include "benchmark.h"
27
28
29#define show_progress(total_time, progress_time) \
30if (config->output != stdout) { \
31 fprintf(stdout, "Progress: %02lu %%\r", \
32 (progress_time * 100) / total_time); \
33 fflush(stdout); \
34}
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44
45unsigned int calculate_timespace(long load, struct config *config)
46{
47 int i;
48 long long now, then;
49 unsigned int estimated = GAUGECOUNT;
50 unsigned int rounds = 0;
51 unsigned int timed = 0;
52
53 if (config->verbose)
54 printf("calibrating load of %lius, please wait...\n", load);
55
56
57 now = get_time();
58 ROUNDS(estimated);
59 then = get_time();
60
61 timed = (unsigned int)(then - now);
62
63
64
65 for (i = 0; i < 4; i++) {
66 rounds = (unsigned int)(load * estimated / timed);
67 dprintf("calibrating with %u rounds\n", rounds);
68 now = get_time();
69 ROUNDS(rounds);
70 then = get_time();
71
72 timed = (unsigned int)(then - now);
73 estimated = rounds;
74 }
75 if (config->verbose)
76 printf("calibration done\n");
77
78 return estimated;
79}
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90
91void start_benchmark(struct config *config)
92{
93 unsigned int _round, cycle;
94 long long now, then;
95 long sleep_time = 0, load_time = 0;
96 long performance_time = 0, powersave_time = 0;
97 unsigned int calculations;
98 unsigned long total_time = 0, progress_time = 0;
99
100 sleep_time = config->sleep;
101 load_time = config->load;
102
103
104 for (_round = 1; _round <= config->rounds; _round++)
105 total_time += _round * (config->sleep + config->load);
106 total_time *= 2;
107
108 for (_round = 0; _round < config->rounds; _round++) {
109 performance_time = 0LL;
110 powersave_time = 0LL;
111
112 show_progress(total_time, progress_time);
113
114
115
116 if (set_cpufreq_governor("performance", config->cpu) != 0)
117 return;
118
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120
121
122 calculations = calculate_timespace(load_time, config);
123
124 if (config->verbose)
125 printf("_round %i: doing %u cycles with %u calculations"
126 " for %lius\n", _round + 1, config->cycles,
127 calculations, load_time);
128
129 fprintf(config->output, "%u %li %li ",
130 _round, load_time, sleep_time);
131
132 if (config->verbose)
133 printf("average: %lius, rps:%li\n",
134 load_time / calculations,
135 1000000 * calculations / load_time);
136
137
138 for (cycle = 0; cycle < config->cycles; cycle++) {
139 now = get_time();
140 usleep(sleep_time);
141 ROUNDS(calculations);
142 then = get_time();
143 performance_time += then - now - sleep_time;
144 if (config->verbose)
145 printf("performance cycle took %lius, "
146 "sleep: %lius, "
147 "load: %lius, rounds: %u\n",
148 (long)(then - now), sleep_time,
149 load_time, calculations);
150 }
151 fprintf(config->output, "%li ",
152 performance_time / config->cycles);
153
154 progress_time += sleep_time + load_time;
155 show_progress(total_time, progress_time);
156
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158
159 if (set_cpufreq_governor(config->governor, config->cpu) != 0)
160 return;
161
162
163
164 for (cycle = 0; cycle < config->cycles; cycle++) {
165 now = get_time();
166 usleep(sleep_time);
167 ROUNDS(calculations);
168 then = get_time();
169 powersave_time += then - now - sleep_time;
170 if (config->verbose)
171 printf("powersave cycle took %lius, "
172 "sleep: %lius, "
173 "load: %lius, rounds: %u\n",
174 (long)(then - now), sleep_time,
175 load_time, calculations);
176 }
177
178 progress_time += sleep_time + load_time;
179
180
181 fprintf(config->output, "%li ",
182 powersave_time / config->cycles);
183 fprintf(config->output, "%.3f\n",
184 performance_time * 100.0 / powersave_time);
185 fflush(config->output);
186
187 if (config->verbose)
188 printf("performance is at %.2f%%\n",
189 performance_time * 100.0 / powersave_time);
190
191 sleep_time += config->sleep_step;
192 load_time += config->load_step;
193 }
194}
195