diff options
Diffstat (limited to 'tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c')
| -rw-r--r-- | tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c b/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c new file mode 100644 index 000000000000..63f6d670517b --- /dev/null +++ b/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c @@ -0,0 +1,185 @@ +/* + * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc + * + * Licensed under the terms of the GNU GPL License version 2. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <limits.h> + +#include "helpers/sysfs.h" +#include "helpers/helpers.h" +#include "idle_monitor/cpupower-monitor.h" + +#define CPUIDLE_STATES_MAX 10 +static cstate_t cpuidle_cstates[CPUIDLE_STATES_MAX]; +struct cpuidle_monitor cpuidle_sysfs_monitor; + +static unsigned long long **previous_count; +static unsigned long long **current_count; +struct timespec start_time; +static unsigned long long timediff; + +static int cpuidle_get_count_percent(unsigned int id, double *percent, + unsigned int cpu) +{ + unsigned long long statediff = current_count[cpu][id] + - previous_count[cpu][id]; + dprint("%s: - diff: %llu - percent: %f (%u)\n", + cpuidle_cstates[id].name, timediff, *percent, cpu); + + if (timediff == 0) + *percent = 0.0; + else + *percent = ((100.0 * statediff) / timediff); + + dprint("%s: - timediff: %llu - statediff: %llu - percent: %f (%u)\n", + cpuidle_cstates[id].name, timediff, statediff, *percent, cpu); + + return 0; +} + +static int cpuidle_start(void) +{ + int cpu, state; + clock_gettime(CLOCK_REALTIME, &start_time); + for (cpu = 0; cpu < cpu_count; cpu++) { + for (state = 0; state < cpuidle_sysfs_monitor.hw_states_num; + state++) { + previous_count[cpu][state] = + sysfs_get_idlestate_time(cpu, state); + dprint("CPU %d - State: %d - Val: %llu\n", + cpu, state, previous_count[cpu][state]); + } + + }; + return 0; +} + +static int cpuidle_stop(void) +{ + int cpu, state; + struct timespec end_time; + clock_gettime(CLOCK_REALTIME, &end_time); + timediff = timespec_diff_us(start_time, end_time); + + for (cpu = 0; cpu < cpu_count; cpu++) { + for (state = 0; state < cpuidle_sysfs_monitor.hw_states_num; + state++) { + current_count[cpu][state] = + sysfs_get_idlestate_time(cpu, state); + dprint("CPU %d - State: %d - Val: %llu\n", + cpu, state, previous_count[cpu][state]); + } + }; + return 0; +} + +void fix_up_intel_idle_driver_name(char *tmp, int num) +{ + /* fix up cpuidle name for intel idle driver */ + if (!strncmp(tmp, "NHM-", 4)) { + switch(num) { + case 1: strcpy(tmp, "C1"); + break; + case 2: strcpy(tmp, "C3"); + break; + case 3: strcpy(tmp, "C6"); + break; + } + } else if (!strncmp(tmp, "SNB-", 4)) { + switch(num) { + case 1: strcpy(tmp, "C1"); + break; + case 2: strcpy(tmp, "C3"); + break; + case 3: strcpy(tmp, "C6"); + break; + case 4: strcpy(tmp, "C7"); + break; + } + } else if (!strncmp(tmp, "ATM-", 4)) { + switch(num) { + case 1: strcpy(tmp, "C1"); + break; + case 2: strcpy(tmp, "C2"); + break; + case 3: strcpy(tmp, "C4"); + break; + case 4: strcpy(tmp, "C6"); + break; + } + } +} + +static struct cpuidle_monitor* cpuidle_register(void) +{ + int num; + char *tmp; + + /* Assume idle state count is the same for all CPUs */ + cpuidle_sysfs_monitor.hw_states_num = sysfs_get_idlestate_count(0); + + if (cpuidle_sysfs_monitor.hw_states_num == 0) + return NULL; + + for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num ++) { + tmp = sysfs_get_idlestate_name(0, num); + if (tmp == NULL) + continue; + + fix_up_intel_idle_driver_name(tmp, num); + strncpy(cpuidle_cstates[num].name, tmp, CSTATE_NAME_LEN - 1); + free(tmp); + + tmp = sysfs_get_idlestate_desc(0, num); + if (tmp == NULL) + continue; + strncpy(cpuidle_cstates[num].desc, tmp, CSTATE_DESC_LEN - 1); + free(tmp); + + cpuidle_cstates[num].range = RANGE_THREAD; + cpuidle_cstates[num].id = num; + cpuidle_cstates[num].get_count_percent = cpuidle_get_count_percent; + }; + + /* Free this at program termination */ + previous_count = malloc(sizeof (long long*) * cpu_count); + current_count = malloc(sizeof (long long*) * cpu_count); + for (num = 0; num < cpu_count; num++) { + previous_count[num] = malloc (sizeof(long long) * + cpuidle_sysfs_monitor.hw_states_num); + current_count[num] = malloc (sizeof(long long) * + cpuidle_sysfs_monitor.hw_states_num); + } + + cpuidle_sysfs_monitor.name_len = strlen(cpuidle_sysfs_monitor.name); + return &cpuidle_sysfs_monitor; +} + +void cpuidle_unregister(void) +{ + int num; + + for (num = 0; num < cpu_count; num++) { + free(previous_count[num]); + free(current_count[num]); + } + free(previous_count); + free(current_count); +} + +struct cpuidle_monitor cpuidle_sysfs_monitor = { + .name = "Idle_Stats", + .hw_states = cpuidle_cstates, + .start = cpuidle_start, + .stop = cpuidle_stop, + .do_register = cpuidle_register, + .unregister = cpuidle_unregister, + .needs_root = 0, + .overflow_s = UINT_MAX, +}; |