/*
* Get current state
*
* IN: cpuidx - cpu to query
* Return: SLURM_SUCCESS or SLURM_FAILURE
*/
static int
_cpu_freq_current_state(int cpuidx)
{
uint32_t freq;
/*
* Getting 'previous' values using the 'scaling' values rather
* than the 'cpuinfo' values.
* The 'cpuinfo' values are read only. min/max seem to be raw
* hardware capability.
* The 'scaling' values are set by the governor
*/
freq = _cpu_freq_get_scaling_freq(cpuidx, "scaling_cur_freq");
if (freq == 0)
return SLURM_FAILURE;
cpufreq[cpuidx].org_frequency = freq;
freq = _cpu_freq_get_scaling_freq(cpuidx, "scaling_min_freq");
if (freq == 0)
return SLURM_FAILURE;
cpufreq[cpuidx].org_min_freq = freq;
freq = _cpu_freq_get_scaling_freq(cpuidx, "scaling_max_freq");
if (freq == 0)
return SLURM_FAILURE;
cpufreq[cpuidx].org_max_freq = freq;
return _cpu_freq_get_cur_gov(cpuidx);
}
/*
* Get current state
*
* IN: cpuidx - cpu to query
* Return: SLURM_SUCCESS or SLURM_FAILURE
*/
static int
_cpu_freq_current_state(int cpuidx)
{
uint32_t freq;
if (cpufreq[cpuidx].org_set) {
/*
* The current state was already loaded for this cpu.
* Likely caused by stacked task plugins. Prevent
* overwriting the original values so they can be
* restored correctly after job completion.
*/
return SLURM_SUCCESS;
}
/*
* Getting 'previous' values using the 'scaling' values rather
* than the 'cpuinfo' values.
* The 'cpuinfo' values are read only. min/max seem to be raw
* hardware capability.
* The 'scaling' values are set by the governor.
* For the current frequency, use the cpuinfo_cur_freq file
* since the intel_pstate driver doesn't necessarily create
* the scaling_cur_freq file.
*/
freq = _cpu_freq_get_scaling_freq(cpuidx, "cpuinfo_cur_freq");
if (freq == 0)
return SLURM_FAILURE;
cpufreq[cpuidx].org_frequency = freq;
freq = _cpu_freq_get_scaling_freq(cpuidx, "scaling_min_freq");
if (freq == 0)
return SLURM_FAILURE;
cpufreq[cpuidx].org_min_freq = freq;
freq = _cpu_freq_get_scaling_freq(cpuidx, "scaling_max_freq");
if (freq == 0)
return SLURM_FAILURE;
cpufreq[cpuidx].org_max_freq = freq;
if (_cpu_freq_get_cur_gov(cpuidx) == SLURM_SUCCESS) {
cpufreq[cpuidx].org_set = true;
return SLURM_SUCCESS;
} else {
return SLURM_FAILURE;
}
}
