2 * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc
4 * Licensed under the terms of the GNU GPL License version 2.
15 #include "helpers/helpers.h"
16 #include "idle_monitor/cpupower-monitor.h"
18 #define CPUIDLE_STATES_MAX 10
19 static cstate_t cpuidle_cstates[CPUIDLE_STATES_MAX];
20 struct cpuidle_monitor cpuidle_sysfs_monitor;
22 static unsigned long long **previous_count;
23 static unsigned long long **current_count;
24 static struct timespec start_time;
25 static unsigned long long timediff;
27 static int cpuidle_get_count_percent(unsigned int id, double *percent,
30 unsigned long long statediff = current_count[cpu][id]
31 - previous_count[cpu][id];
32 dprint("%s: - diff: %llu - percent: %f (%u)\n",
33 cpuidle_cstates[id].name, timediff, *percent, cpu);
38 *percent = ((100.0 * statediff) / timediff);
40 dprint("%s: - timediff: %llu - statediff: %llu - percent: %f (%u)\n",
41 cpuidle_cstates[id].name, timediff, statediff, *percent, cpu);
46 static int cpuidle_start(void)
49 clock_gettime(CLOCK_REALTIME, &start_time);
50 for (cpu = 0; cpu < cpu_count; cpu++) {
51 for (state = 0; state < cpuidle_sysfs_monitor.hw_states_num;
53 previous_count[cpu][state] =
54 cpuidle_state_time(cpu, state);
55 dprint("CPU %d - State: %d - Val: %llu\n",
56 cpu, state, previous_count[cpu][state]);
62 static int cpuidle_stop(void)
65 struct timespec end_time;
66 clock_gettime(CLOCK_REALTIME, &end_time);
67 timediff = timespec_diff_us(start_time, end_time);
69 for (cpu = 0; cpu < cpu_count; cpu++) {
70 for (state = 0; state < cpuidle_sysfs_monitor.hw_states_num;
72 current_count[cpu][state] =
73 cpuidle_state_time(cpu, state);
74 dprint("CPU %d - State: %d - Val: %llu\n",
75 cpu, state, previous_count[cpu][state]);
81 void fix_up_intel_idle_driver_name(char *tmp, int num)
83 /* fix up cpuidle name for intel idle driver */
84 if (!strncmp(tmp, "NHM-", 4)) {
96 } else if (!strncmp(tmp, "SNB-", 4)) {
111 } else if (!strncmp(tmp, "ATM-", 4)) {
129 static struct cpuidle_monitor *cpuidle_register(void)
135 this_cpu = sched_getcpu();
137 /* Assume idle state count is the same for all CPUs */
138 cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(this_cpu);
140 if (cpuidle_sysfs_monitor.hw_states_num <= 0)
143 for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num++) {
144 tmp = cpuidle_state_name(this_cpu, num);
148 fix_up_intel_idle_driver_name(tmp, num);
149 strncpy(cpuidle_cstates[num].name, tmp, CSTATE_NAME_LEN - 1);
152 tmp = cpuidle_state_desc(this_cpu, num);
155 strncpy(cpuidle_cstates[num].desc, tmp, CSTATE_DESC_LEN - 1);
158 cpuidle_cstates[num].range = RANGE_THREAD;
159 cpuidle_cstates[num].id = num;
160 cpuidle_cstates[num].get_count_percent =
161 cpuidle_get_count_percent;
164 /* Free this at program termination */
165 previous_count = malloc(sizeof(long long *) * cpu_count);
166 current_count = malloc(sizeof(long long *) * cpu_count);
167 for (num = 0; num < cpu_count; num++) {
168 previous_count[num] = malloc(sizeof(long long) *
169 cpuidle_sysfs_monitor.hw_states_num);
170 current_count[num] = malloc(sizeof(long long) *
171 cpuidle_sysfs_monitor.hw_states_num);
174 cpuidle_sysfs_monitor.name_len = strlen(cpuidle_sysfs_monitor.name);
175 return &cpuidle_sysfs_monitor;
178 void cpuidle_unregister(void)
182 for (num = 0; num < cpu_count; num++) {
183 free(previous_count[num]);
184 free(current_count[num]);
186 free(previous_count);
190 struct cpuidle_monitor cpuidle_sysfs_monitor = {
191 .name = "Idle_Stats",
192 .hw_states = cpuidle_cstates,
193 .start = cpuidle_start,
194 .stop = cpuidle_stop,
195 .do_register = cpuidle_register,
196 .unregister = cpuidle_unregister,
198 .overflow_s = UINT_MAX,