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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-06-28 19:49:44 -0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-06-29 17:26:15 -0400
commit8183003e48cbb9d6d276b6330eb5edecf95830f3 (patch)
treeb7e2289a4a019ea40bb0efd8b99635f763056a0e
parentfab24dcc395637557a7988a867e7b3a5823917a9 (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.rst12
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.