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authorNaga Chumbalkar <nagananda.chumbalkar@hp.com>2009-06-29 19:53:41 +0000
committerDave Jones <davej@redhat.com>2009-09-01 12:45:09 -0400
commitda470db16c703d7f9617c366a36c6670f89a9830 (patch)
treed8829490c58c149573085c00d9ccff98bac998a8 /Documentation/cpu-freq
parentce6c3997c2fce74d12e6d8887a1d8cdf024fa850 (diff)
downloadlinux-da470db16c703d7f9617c366a36c6670f89a9830.tar.gz
[CPUFREQ] update Doc for cpuinfo_cur_freq and scaling_cur_freq
I think the way "cpuinfo_cur_info" and "scaling_cur_info" are defined under ./Documentation/cpu-freq/user-guide.txt can be enhanced. Currently, they are both defined the same way: "Current speed/frequency" of the CPU, in KHz". Below is a patch that distinguishes one from the other. Regards, - naga - ----------------------------------------- Update description for "cpuinfo_cur_freq" and "scaling_cur_freq". Some of the wording is drawn from comments found in ./drivers/cpufreq/cpufreq.c: cpufreq_out_of_sync(): * @old_freq: CPU frequency the kernel thinks the CPU runs at * @new_freq: CPU frequency the CPU actually runs at Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'Documentation/cpu-freq')
-rw-r--r--Documentation/cpu-freq/user-guide.txt9
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt
index 5d5f5fadd1c..2a5b850847c 100644
--- a/Documentation/cpu-freq/user-guide.txt
+++ b/Documentation/cpu-freq/user-guide.txt
@@ -176,7 +176,9 @@ scaling_governor, and by "echoing" the name of another
work on some specific architectures or
processors.
-cpuinfo_cur_freq : Current speed of the CPU, in KHz.
+cpuinfo_cur_freq : Current frequency of the CPU as obtained from
+ the hardware, in KHz. This is the frequency
+ the CPU actually runs at.
scaling_available_frequencies : List of available frequencies, in KHz.
@@ -196,7 +198,10 @@ related_cpus : List of CPUs that need some sort of frequency
scaling_driver : Hardware driver for cpufreq.
-scaling_cur_freq : Current frequency of the CPU, in KHz.
+scaling_cur_freq : Current frequency of the CPU as determined by
+ the governor and cpufreq core, in KHz. This is
+ the frequency the kernel thinks the CPU runs
+ at.
If you have selected the "userspace" governor which allows you to
set the CPU operating frequency to a specific value, you can read out