static void proc_cpuidle_cpu_output(unsigned int cpu)
{
long max_allowed_cstate = 2000000000;
int cstates, cstate;
cstates = sysfs_get_idlestate_count(cpu);
if (cstates == 0) {
/*
* Go on and print same useless info as you'd see with
* cat /proc/acpi/processor/../power
* printf(_("CPU %u: No C-states available\n"), cpu);
* return;
*/
} else if (cstates <= 0) {
printf(_("CPU %u: Can't read C-state info\n"), cpu);
return;
}
/* printf("Cstates: %d\n", cstates); */
printf(_("active state: C0\n"));
printf(_("max_cstate: C%u\n"), cstates-1);
printf(_("maximum allowed latency: %lu usec\n"), max_allowed_cstate);
printf(_("states:\t\n"));
for (cstate = 1; cstate < cstates; cstate++) {
printf(_(" C%d: "
"type[C%d] "), cstate, cstate);
printf(_("promotion[--] demotion[--] "));
printf(_("latency[%03lu] "),
sysfs_get_idlestate_latency(cpu, cstate));
printf(_("usage[%08lu] "),
sysfs_get_idlestate_usage(cpu, cstate));
printf(_("duration[%020Lu] \n"),
sysfs_get_idlestate_time(cpu, cstate));
}
}
static void proc_cpuidle_cpu_output(unsigned int cpu)
{
long max_allowed_cstate = 2000000000;
int cstate, cstates;
cstates = sysfs_get_idlestate_count(cpu);
if (cstates < 1) {
printf(_("CPU %u: No C-states info\n"), cpu);
return;
}
printf(_("active state: C0\n"));
printf(_("max_cstate: C%u\n"), cstates-1);
printf(_("maximum allowed latency: %lu usec\n"), max_allowed_cstate);
printf(_("states:\t\n"));
for (cstate = 1; cstate < cstates; cstate++) {
printf(_(" C%d: "
"type[C%d] "), cstate, cstate);
printf(_("promotion[--] demotion[--] "));
printf(_("latency[%03lu] "),
sysfs_get_idlestate_latency(cpu, cstate));
printf(_("usage[%08lu] "),
sysfs_get_idlestate_usage(cpu, cstate));
printf(_("duration[%020Lu] \n"),
sysfs_get_idlestate_time(cpu, cstate));
}
}
static void cpuidle_cpu_output(unsigned int cpu, int verbose)
{
int idlestates, idlestate;
char *tmp;
printf(_ ("Analyzing CPU %d:\n"), cpu);
idlestates = sysfs_get_idlestate_count(cpu);
if (idlestates == 0) {
printf(_("CPU %u: No idle states\n"), cpu);
return;
} else if (idlestates <= 0) {
printf(_("CPU %u: Can't read idle state info\n"), cpu);
return;
}
tmp = sysfs_get_idlestate_name(cpu, idlestates - 1);
if (!tmp) {
printf(_("Could not determine max idle state %u\n"),
idlestates - 1);
return;
}
printf(_("Number of idle states: %d\n"), idlestates);
printf(_("Available idle states:"));
for (idlestate = 1; idlestate < idlestates; idlestate++) {
tmp = sysfs_get_idlestate_name(cpu, idlestate);
if (!tmp)
continue;
printf(" %s", tmp);
free(tmp);
}
printf("\n");
if (!verbose)
return;
for (idlestate = 1; idlestate < idlestates; idlestate++) {
tmp = sysfs_get_idlestate_name(cpu, idlestate);
if (!tmp)
continue;
printf("%s:\n", tmp);
free(tmp);
tmp = sysfs_get_idlestate_desc(cpu, idlestate);
if (!tmp)
continue;
printf(_("Flags/Description: %s\n"), tmp);
free(tmp);
printf(_("Latency: %lu\n"),
sysfs_get_idlestate_latency(cpu, idlestate));
printf(_("Usage: %lu\n"),
sysfs_get_idlestate_usage(cpu, idlestate));
printf(_("Duration: %llu\n"),
sysfs_get_idlestate_time(cpu, idlestate));
}
printf("\n");
}
/*
* Returns:
* 1 if disabled
* 0 if enabled
* -1 if idlestate is not available
* -2 if disabling is not supported by the kernel
*/
int sysfs_is_idlestate_disabled(unsigned int cpu,
unsigned int idlestate)
{
if (sysfs_get_idlestate_count(cpu) <= idlestate)
return -1;
if (!sysfs_idlestate_file_exists(cpu, idlestate,
idlestate_value_files[IDLESTATE_DISABLE]))
return -2;
return sysfs_idlestate_get_one_value(cpu, idlestate, IDLESTATE_DISABLE);
}
static void cpuidle_cpu_output(unsigned int cpu, int verbose)
{
int idlestates, idlestate;
char *tmp;
printf(_ ("Analyzing CPU %d:\n"), cpu);
idlestates = sysfs_get_idlestate_count(cpu);
if (idlestates < 1) {
printf(_("CPU %u: No idle states\n"), cpu);
return;
}
printf(_("Number of idle states: %d\n"), idlestates);
printf(_("Available idle states:"));
for (idlestate = 0; idlestate < idlestates; idlestate++) {
tmp = sysfs_get_idlestate_name(cpu, idlestate);
if (!tmp)
continue;
printf(" %s", tmp);
free(tmp);
}
printf("\n");
if (!verbose)
return;
for (idlestate = 0; idlestate < idlestates; idlestate++) {
int disabled = sysfs_is_idlestate_disabled(cpu, idlestate);
/* Disabled interface not supported on older kernels */
if (disabled < 0)
disabled = 0;
tmp = sysfs_get_idlestate_name(cpu, idlestate);
if (!tmp)
continue;
printf("%s%s:\n", tmp, (disabled) ? " (DISABLED) " : "");
free(tmp);
tmp = sysfs_get_idlestate_desc(cpu, idlestate);
if (!tmp)
continue;
printf(_("Flags/Description: %s\n"), tmp);
free(tmp);
printf(_("Latency: %lu\n"),
sysfs_get_idlestate_latency(cpu, idlestate));
printf(_("Usage: %lu\n"),
sysfs_get_idlestate_usage(cpu, idlestate));
printf(_("Duration: %llu\n"),
sysfs_get_idlestate_time(cpu, idlestate));
}
printf("\n");
}
static struct cpuidle_monitor *cpuidle_register(void)
{
int num;
char *tmp;
/* */
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;
};
/* */
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;
}
/*
* Pass 1 as last argument to disable or 0 to enable the state
* Returns:
* 0 on success
* negative values on error, for example:
* -1 if idlestate is not available
* -2 if disabling is not supported by the kernel
* -3 No write access to disable/enable C-states
*/
int sysfs_idlestate_disable(unsigned int cpu,
unsigned int idlestate,
unsigned int disable)
{
char value[SYSFS_PATH_MAX];
int bytes_written;
if (sysfs_get_idlestate_count(cpu) <= idlestate)
return -1;
if (!sysfs_idlestate_file_exists(cpu, idlestate,
idlestate_value_files[IDLESTATE_DISABLE]))
return -2;
snprintf(value, SYSFS_PATH_MAX, "%u", disable);
bytes_written = sysfs_idlestate_write_file(cpu, idlestate, "disable",
value, sizeof(disable));
if (bytes_written)
return 0;
return -3;
}
