Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc |
| 3 | * |
| 4 | * Licensed under the terms of the GNU GPL License version 2. |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <stdint.h> |
| 11 | #include <string.h> |
| 12 | #include <limits.h> |
Thomas Renninger | ac5a181 | 2016-04-28 15:24:40 +0200 | [diff] [blame] | 13 | #include <cpuidle.h> |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 14 | |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 15 | #include "helpers/helpers.h" |
| 16 | #include "idle_monitor/cpupower-monitor.h" |
| 17 | |
| 18 | #define CPUIDLE_STATES_MAX 10 |
| 19 | static cstate_t cpuidle_cstates[CPUIDLE_STATES_MAX]; |
| 20 | struct cpuidle_monitor cpuidle_sysfs_monitor; |
| 21 | |
| 22 | static unsigned long long **previous_count; |
| 23 | static unsigned long long **current_count; |
| 24 | struct timespec start_time; |
| 25 | static unsigned long long timediff; |
| 26 | |
| 27 | static int cpuidle_get_count_percent(unsigned int id, double *percent, |
| 28 | unsigned int cpu) |
| 29 | { |
| 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); |
| 34 | |
| 35 | if (timediff == 0) |
| 36 | *percent = 0.0; |
| 37 | else |
| 38 | *percent = ((100.0 * statediff) / timediff); |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 39 | |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 40 | dprint("%s: - timediff: %llu - statediff: %llu - percent: %f (%u)\n", |
| 41 | cpuidle_cstates[id].name, timediff, statediff, *percent, cpu); |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 42 | |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int cpuidle_start(void) |
| 47 | { |
| 48 | int cpu, state; |
| 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; |
| 52 | state++) { |
| 53 | previous_count[cpu][state] = |
Thomas Renninger | ac5a181 | 2016-04-28 15:24:40 +0200 | [diff] [blame] | 54 | cpuidle_state_time(cpu, state); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 55 | dprint("CPU %d - State: %d - Val: %llu\n", |
| 56 | cpu, state, previous_count[cpu][state]); |
| 57 | } |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 58 | }; |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static int cpuidle_stop(void) |
| 63 | { |
| 64 | int cpu, state; |
| 65 | struct timespec end_time; |
| 66 | clock_gettime(CLOCK_REALTIME, &end_time); |
| 67 | timediff = timespec_diff_us(start_time, end_time); |
| 68 | |
| 69 | for (cpu = 0; cpu < cpu_count; cpu++) { |
| 70 | for (state = 0; state < cpuidle_sysfs_monitor.hw_states_num; |
| 71 | state++) { |
| 72 | current_count[cpu][state] = |
Thomas Renninger | ac5a181 | 2016-04-28 15:24:40 +0200 | [diff] [blame] | 73 | cpuidle_state_time(cpu, state); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 74 | dprint("CPU %d - State: %d - Val: %llu\n", |
| 75 | cpu, state, previous_count[cpu][state]); |
| 76 | } |
| 77 | }; |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | void fix_up_intel_idle_driver_name(char *tmp, int num) |
| 82 | { |
| 83 | /* fix up cpuidle name for intel idle driver */ |
| 84 | if (!strncmp(tmp, "NHM-", 4)) { |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 85 | switch (num) { |
| 86 | case 1: |
| 87 | strcpy(tmp, "C1"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 88 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 89 | case 2: |
| 90 | strcpy(tmp, "C3"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 91 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 92 | case 3: |
| 93 | strcpy(tmp, "C6"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 94 | break; |
| 95 | } |
| 96 | } else if (!strncmp(tmp, "SNB-", 4)) { |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 97 | switch (num) { |
| 98 | case 1: |
| 99 | strcpy(tmp, "C1"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 100 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 101 | case 2: |
| 102 | strcpy(tmp, "C3"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 103 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 104 | case 3: |
| 105 | strcpy(tmp, "C6"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 106 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 107 | case 4: |
| 108 | strcpy(tmp, "C7"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 109 | break; |
| 110 | } |
| 111 | } else if (!strncmp(tmp, "ATM-", 4)) { |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 112 | switch (num) { |
| 113 | case 1: |
| 114 | strcpy(tmp, "C1"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 115 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 116 | case 2: |
| 117 | strcpy(tmp, "C2"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 118 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 119 | case 3: |
| 120 | strcpy(tmp, "C4"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 121 | break; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 122 | case 4: |
| 123 | strcpy(tmp, "C6"); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 124 | break; |
| 125 | } |
| 126 | } |
| 127 | } |
| 128 | |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 129 | static struct cpuidle_monitor *cpuidle_register(void) |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 130 | { |
| 131 | int num; |
| 132 | char *tmp; |
Abhishek Goel | d8f75b4 | 2017-11-15 14:10:02 +0530 | [diff] [blame] | 133 | int this_cpu; |
| 134 | |
| 135 | this_cpu = sched_getcpu(); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 136 | |
| 137 | /* Assume idle state count is the same for all CPUs */ |
Abhishek Goel | d8f75b4 | 2017-11-15 14:10:02 +0530 | [diff] [blame] | 138 | cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(this_cpu); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 139 | |
Thomas Renninger | 88f984e | 2011-08-12 01:11:36 +0200 | [diff] [blame] | 140 | if (cpuidle_sysfs_monitor.hw_states_num <= 0) |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 141 | return NULL; |
| 142 | |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 143 | for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num++) { |
Abhishek Goel | d8f75b4 | 2017-11-15 14:10:02 +0530 | [diff] [blame] | 144 | tmp = cpuidle_state_name(this_cpu, num); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 145 | if (tmp == NULL) |
| 146 | continue; |
| 147 | |
| 148 | fix_up_intel_idle_driver_name(tmp, num); |
| 149 | strncpy(cpuidle_cstates[num].name, tmp, CSTATE_NAME_LEN - 1); |
| 150 | free(tmp); |
| 151 | |
Abhishek Goel | d8f75b4 | 2017-11-15 14:10:02 +0530 | [diff] [blame] | 152 | tmp = cpuidle_state_desc(this_cpu, num); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 153 | if (tmp == NULL) |
| 154 | continue; |
| 155 | strncpy(cpuidle_cstates[num].desc, tmp, CSTATE_DESC_LEN - 1); |
| 156 | free(tmp); |
| 157 | |
| 158 | cpuidle_cstates[num].range = RANGE_THREAD; |
| 159 | cpuidle_cstates[num].id = num; |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 160 | cpuidle_cstates[num].get_count_percent = |
| 161 | cpuidle_get_count_percent; |
| 162 | }; |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 163 | |
| 164 | /* Free this at program termination */ |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 165 | previous_count = malloc(sizeof(long long *) * cpu_count); |
| 166 | current_count = malloc(sizeof(long long *) * cpu_count); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 167 | for (num = 0; num < cpu_count; num++) { |
Dominik Brodowski | b510b54 | 2011-04-19 19:58:59 +0200 | [diff] [blame] | 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); |
Dominik Brodowski | 7fe2f63 | 2011-03-30 16:30:11 +0200 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | cpuidle_sysfs_monitor.name_len = strlen(cpuidle_sysfs_monitor.name); |
| 175 | return &cpuidle_sysfs_monitor; |
| 176 | } |
| 177 | |
| 178 | void cpuidle_unregister(void) |
| 179 | { |
| 180 | int num; |
| 181 | |
| 182 | for (num = 0; num < cpu_count; num++) { |
| 183 | free(previous_count[num]); |
| 184 | free(current_count[num]); |
| 185 | } |
| 186 | free(previous_count); |
| 187 | free(current_count); |
| 188 | } |
| 189 | |
| 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, |
| 197 | .needs_root = 0, |
| 198 | .overflow_s = UINT_MAX, |
| 199 | }; |