path: root/Documentation/cpu-freq
diff options
authorThomas Renninger <>2009-02-04 11:54:04 +0100
committerDave Jones <>2009-02-24 22:47:31 -0500
commit9411b4ef7fcb534fe1582fe02738254e398dd931 (patch)
tree86b7fcf2f085427fc3ea2b7f51527a0af7e6e1df /Documentation/cpu-freq
parent57f4fa699195b761cbea90db5e38b4bc15610c7c (diff)
[CPUFREQ] ondemand/conservative: deprecate sampling_rate{min,max}
The same info can be obtained via the transition_latency sysfs file Signed-off-by: Thomas Renninger <> Signed-off-by: Dave Jones <>
Diffstat (limited to 'Documentation/cpu-freq')
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt
index 5b0cfa67aff9..9b1851297d4e 100644
--- a/Documentation/cpu-freq/governors.txt
+++ b/Documentation/cpu-freq/governors.txt
@@ -119,8 +119,14 @@ want the kernel to look at the CPU usage and to make decisions on
what to do about the frequency. Typically this is set to values of
around '10000' or more.
-show_sampling_rate_(min|max): the minimum and maximum sampling rates
-available that you may set 'sampling_rate' to.
+show_sampling_rate_(min|max): THIS INTERFACE IS DEPRECATED, DON'T USE IT.
+You can use wider ranges now and the general
+cpuinfo_transition_latency variable (cmp. with user-guide.txt) can be
+used to obtain exactly the same info:
+show_sampling_rate_min = transtition_latency * 500 / 1000
+show_sampling_rate_max = transtition_latency * 500000 / 1000
+(divided by 1000 is to illustrate that sampling rate is in us and
+transition latency is exported ns).
up_threshold: defines what the average CPU usage between the samplings
of 'sampling_rate' needs to be for the kernel to make a decision on