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Groups > linux.kernel > #1610140
| From | "Rafael J. Wysocki" <rjw@rjwysocki.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 06/16] cpufreq: intel_pstate: Set HWP sampling interval once |
| Date | 2017-03-28 00:50 +0200 |
| Message-ID | <tpLCy-6Cv-13@gated-at.bofh.it> (permalink) |
| References | <tpLsR-6yQ-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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>
---
drivers/cpufreq/intel_pstate.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -1911,8 +1911,6 @@ static int intel_pstate_init_cpu(unsigne
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 {
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[PATCH 00/16] cpufreq: intel_pstate: Cleanups and optimizations "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 02/16] cpufreq: intel_pstate: Drop pointless initialization of PID parameters "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 13/16] cpufreq: intel_pstate: Drop struct cpu_defaults "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 10/16] cpufreq: intel_pstate: Use different utilization update callbacks "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 14/16] cpufreq: intel_pstate: Introduce pid_in_use() "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 08/16] cpufreq: intel_pstate: Drop driver_registered variable "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 03/16] cpufreq: intel_pstate: Initialize pid_params statically "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 06/16] cpufreq: intel_pstate: Set HWP sampling interval once "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 05/16] cpufreq: intel_pstate: Clean up intel_pstate_busy_pid_reset() "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 11/16] cpufreq: intel_pstate: Add update_util callback to pstate_funcs "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 09/16] cpufreq: intel_pstate: Modify check in intel_pstate_update_status() "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200 [PATCH 01/16] cpufreq: intel_pstate: Eliminate struct perf_limits "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-03-28 00:50 +0200
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