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| author | David S. Miller <davem@davemloft.net> | 2009-03-26 15:23:24 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-26 15:23:24 -0700 |
| commit | 08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6 (patch) | |
| tree | 2be39bf8942edca1bcec735145e144a682ca9cd3 /Documentation/cpu-freq/user-guide.txt | |
| parent | f0de70f8bb56952f6e016a65a8a8d006918f5bf6 (diff) | |
| parent | 0384e2959127a56d0640505d004d8dd92f9c29f5 (diff) | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
drivers/net/wimax/i2400m/usb-notif.c
Diffstat (limited to 'Documentation/cpu-freq/user-guide.txt')
| -rw-r--r-- | Documentation/cpu-freq/user-guide.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt index 917918f84fc7..75f41193f3e1 100644 --- a/Documentation/cpu-freq/user-guide.txt +++ b/Documentation/cpu-freq/user-guide.txt @@ -152,6 +152,18 @@ cpuinfo_min_freq : this file shows the minimum operating frequency the processor can run at(in kHz) cpuinfo_max_freq : this file shows the maximum operating frequency the processor can run at(in kHz) +cpuinfo_transition_latency The time it takes on this CPU to + switch between two frequencies in nano + seconds. If unknown or known to be + that high that the driver does not + work with the ondemand governor, -1 + (CPUFREQ_ETERNAL) will be returned. + Using this information can be useful + to choose an appropriate polling + frequency for a kernel governor or + userspace daemon. Make sure to not + switch the frequency too often + resulting in performance loss. scaling_driver : this file shows what cpufreq driver is used to set the frequency on this CPU |