diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-06-28 19:49:44 -0400 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-06-29 17:26:15 -0400 |
commit | 8183003e48cbb9d6d276b6330eb5edecf95830f3 (patch) | |
tree | b7e2289a4a019ea40bb0efd8b99635f763056a0e | |
parent | fab24dcc395637557a7988a867e7b3a5823917a9 (diff) |
cpufreq: Update scaling_cur_freq documentation
Commit f8475cef9008 "x86: use common aperfmperf_khz_on_cpu() to
calculate KHz using APERF/MPERF" modified the way the scaling_cur_freq
cpufreq policy attribute in sysfs is handled on contemporary
Intel-based x86 systems, so update the documentation to reflect
that change.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r-- | Documentation/admin-guide/pm/cpufreq.rst | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/admin-guide/pm/cpufreq.rst b/Documentation/admin-guide/pm/cpufreq.rst index 09aa2e949787..463cf7e73db8 100644 --- a/Documentation/admin-guide/pm/cpufreq.rst +++ b/Documentation/admin-guide/pm/cpufreq.rst | |||
@@ -269,16 +269,16 @@ are the following: | |||
269 | ``scaling_cur_freq`` | 269 | ``scaling_cur_freq`` |
270 | Current frequency of all of the CPUs belonging to this policy (in kHz). | 270 | Current frequency of all of the CPUs belonging to this policy (in kHz). |
271 | 271 | ||
272 | For the majority of scaling drivers, this is the frequency of the last | 272 | In the majority of cases, this is the frequency of the last P-state |
273 | P-state requested by the driver from the hardware using the scaling | 273 | requested by the scaling driver from the hardware using the scaling |
274 | interface provided by it, which may or may not reflect the frequency | 274 | interface provided by it, which may or may not reflect the frequency |
275 | the CPU is actually running at (due to hardware design and other | 275 | the CPU is actually running at (due to hardware design and other |
276 | limitations). | 276 | limitations). |
277 | 277 | ||
278 | Some scaling drivers (e.g. |intel_pstate|) attempt to provide | 278 | Some architectures (e.g. ``x86``) may attempt to provide information |
279 | information more precisely reflecting the current CPU frequency through | 279 | more precisely reflecting the current CPU frequency through this |
280 | this attribute, but that still may not be the exact current CPU | 280 | attribute, but that still may not be the exact current CPU frequency as |
281 | frequency as seen by the hardware at the moment. | 281 | seen by the hardware at the moment. |
282 | 282 | ||
283 | ``scaling_driver`` | 283 | ``scaling_driver`` |
284 | The scaling driver currently in use. | 284 | The scaling driver currently in use. |