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cpufreq: intel_pstate: Set HWP sampling interval once 

In the HWP enabled case pid_params.sample_rate_ns only needs to be
updated once, because it is global, so do that when setting hwp_active
instead of doing it during the initialization of every CPU.

Moreover, pid_params.sample_rate_ms is never used if HWP is enabled,
so do not update it at all then.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2017-03-28 00:10:47 +02:00
parent ff35f02ea1
commit 7aec5b50e9
1 changed files with 1 additions and 2 deletions
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3
drivers/cpufreq/intel_pstate.c
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@ -1911,8 +1911,6 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
intel_pstate_disable_ee(cpunum);
intel_pstate_hwp_enable(cpu);
pid_params.sample_rate_ms = 50;
pid_params.sample_rate_ns = 50 * NSEC_PER_MSEC;
}
intel_pstate_get_cpu_pstates(cpu);
@ -2563,6 +2561,7 @@ static int __init intel_pstate_init(void)
} else {
hwp_active++;
intel_pstate.attr = hwp_cpufreq_attrs;
pid_params.sample_rate_ns = 50 * NSEC_PER_MSEC;
goto hwp_cpu_matched;
}
} else {