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| author | Naga Chumbalkar <nagananda.chumbalkar@hp.com> | 2009-06-29 19:53:41 +0000 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2009-09-01 12:45:09 -0400 |
| commit | da470db16c703d7f9617c366a36c6670f89a9830 (patch) | |
| tree | d8829490c58c149573085c00d9ccff98bac998a8 /Documentation/cpu-freq | |
| parent | ce6c3997c2fce74d12e6d8887a1d8cdf024fa850 (diff) | |
| download | lwn-da470db16c703d7f9617c366a36c6670f89a9830.tar.gz lwn-da470db16c703d7f9617c366a36c6670f89a9830.zip | |
[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.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt index 5d5f5fadd1c2..2a5b850847c0 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 |