Commit | Line | Data |
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7fe2f639 DB |
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> | |
ac5a181d | 13 | #include <cpuidle.h> |
7fe2f639 | 14 | |
7fe2f639 DB |
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); | |
b510b541 | 39 | |
7fe2f639 DB |
40 | dprint("%s: - timediff: %llu - statediff: %llu - percent: %f (%u)\n", |
41 | cpuidle_cstates[id].name, timediff, statediff, *percent, cpu); | |
b510b541 | 42 | |
7fe2f639 DB |
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] = | |
ac5a181d | 54 | cpuidle_state_time(cpu, state); |
7fe2f639 DB |
55 | dprint("CPU %d - State: %d - Val: %llu\n", |
56 | cpu, state, previous_count[cpu][state]); | |
57 | } | |
7fe2f639 DB |
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] = | |
ac5a181d | 73 | cpuidle_state_time(cpu, state); |
7fe2f639 DB |
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)) { | |
b510b541 DB |
85 | switch (num) { |
86 | case 1: | |
87 | strcpy(tmp, "C1"); | |
7fe2f639 | 88 | break; |
b510b541 DB |
89 | case 2: |
90 | strcpy(tmp, "C3"); | |
7fe2f639 | 91 | break; |
b510b541 DB |
92 | case 3: |
93 | strcpy(tmp, "C6"); | |
7fe2f639 DB |
94 | break; |
95 | } | |
96 | } else if (!strncmp(tmp, "SNB-", 4)) { | |
b510b541 DB |
97 | switch (num) { |
98 | case 1: | |
99 | strcpy(tmp, "C1"); | |
7fe2f639 | 100 | break; |
b510b541 DB |
101 | case 2: |
102 | strcpy(tmp, "C3"); | |
7fe2f639 | 103 | break; |
b510b541 DB |
104 | case 3: |
105 | strcpy(tmp, "C6"); | |
7fe2f639 | 106 | break; |
b510b541 DB |
107 | case 4: |
108 | strcpy(tmp, "C7"); | |
7fe2f639 DB |
109 | break; |
110 | } | |
111 | } else if (!strncmp(tmp, "ATM-", 4)) { | |
b510b541 DB |
112 | switch (num) { |
113 | case 1: | |
114 | strcpy(tmp, "C1"); | |
7fe2f639 | 115 | break; |
b510b541 DB |
116 | case 2: |
117 | strcpy(tmp, "C2"); | |
7fe2f639 | 118 | break; |
b510b541 DB |
119 | case 3: |
120 | strcpy(tmp, "C4"); | |
7fe2f639 | 121 | break; |
b510b541 DB |
122 | case 4: |
123 | strcpy(tmp, "C6"); | |
7fe2f639 DB |
124 | break; |
125 | } | |
126 | } | |
127 | } | |
128 | ||
b510b541 | 129 | static struct cpuidle_monitor *cpuidle_register(void) |
7fe2f639 DB |
130 | { |
131 | int num; | |
132 | char *tmp; | |
dbdc468f AG |
133 | int this_cpu; |
134 | ||
135 | this_cpu = sched_getcpu(); | |
7fe2f639 DB |
136 | |
137 | /* Assume idle state count is the same for all CPUs */ | |
dbdc468f | 138 | cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(this_cpu); |
7fe2f639 | 139 | |
88f984e0 | 140 | if (cpuidle_sysfs_monitor.hw_states_num <= 0) |
7fe2f639 DB |
141 | return NULL; |
142 | ||
b510b541 | 143 | for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num++) { |
dbdc468f | 144 | tmp = cpuidle_state_name(this_cpu, num); |
7fe2f639 DB |
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 | ||
dbdc468f | 152 | tmp = cpuidle_state_desc(this_cpu, num); |
7fe2f639 DB |
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; | |
b510b541 DB |
160 | cpuidle_cstates[num].get_count_percent = |
161 | cpuidle_get_count_percent; | |
162 | }; | |
7fe2f639 DB |
163 | |
164 | /* Free this at program termination */ | |
b510b541 DB |
165 | previous_count = malloc(sizeof(long long *) * cpu_count); |
166 | current_count = malloc(sizeof(long long *) * cpu_count); | |
7fe2f639 | 167 | for (num = 0; num < cpu_count; num++) { |
b510b541 DB |
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); | |
7fe2f639 DB |
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 | }; |