From 7aec5b50e97dd3e2e6ad8a87ccfd62ba8f49a105 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 28 Mar 2017 00:10:47 +0200 Subject: [PATCH] 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 --- drivers/cpufreq/intel_pstate.c | 3 +-- 1 file changed, 1 insertion(+), 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 { -- 2.20.1