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authorRafael J. Wysocki2017-03-28 00:10:47 +0200
committerRafael J. Wysocki2017-03-28 23:12:14 +0200
commit7aec5b50e97dd3e2e6ad8a87ccfd62ba8f49a105 (patch)
tree0535175237f60243c3e1e63f8681cf99e9509d04 /drivers/cpufreq
parentff35f02ea1e3ac4e774f2784c1444fba4cf8e16a (diff)
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>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/intel_pstate.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 5585a2d101a7..b631ab02f170 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -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 {