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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-04-03 12:01:20 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-04-03 12:01:20 -0700 |
| commit | 03b22057e8ed2d1df416c9ae8e6e247e0b87ecc8 (patch) | |
| tree | cd89bdd4053e46ff3cbd67adeffa24310c04e725 /Documentation/cpu-freq/cpufreq-stats.txt | |
| parent | 96083b2e90cddfb688e70630a1dbfdfe5fb0262d (diff) | |
| parent | a71c9a1c779f2499fb2afc0553e543f18aff6edf (diff) | |
| download | lwn-03b22057e8ed2d1df416c9ae8e6e247e0b87ecc8.tar.gz lwn-03b22057e8ed2d1df416c9ae8e6e247e0b87ecc8.zip | |
Merge tag 'v4.11-rc5' into next
Sync up with mainline to bring in changes to input subsystem merged
through other trees.
Diffstat (limited to 'Documentation/cpu-freq/cpufreq-stats.txt')
| -rw-r--r-- | Documentation/cpu-freq/cpufreq-stats.txt | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/Documentation/cpu-freq/cpufreq-stats.txt b/Documentation/cpu-freq/cpufreq-stats.txt index 3c355f6ad834..2bbe207354ed 100644 --- a/Documentation/cpu-freq/cpufreq-stats.txt +++ b/Documentation/cpu-freq/cpufreq-stats.txt @@ -34,10 +34,10 @@ cpufreq stats provides following statistics (explained in detail below). - total_trans - trans_table -All the statistics will be from the time the stats driver has been inserted -to the time when a read of a particular statistic is done. Obviously, stats -driver will not have any information about the frequency transitions before -the stats driver insertion. +All the statistics will be from the time the stats driver has been inserted +(or the time the stats were reset) to the time when a read of a particular +statistic is done. Obviously, stats driver will not have any information +about the frequency transitions before the stats driver insertion. -------------------------------------------------------------------------------- <mysystem>:/sys/devices/system/cpu/cpu0/cpufreq/stats # ls -l @@ -110,25 +110,13 @@ Config Main Menu CPU Frequency scaling ---> [*] CPU Frequency scaling [*] CPU frequency translation statistics - [*] CPU frequency translation statistics details "CPU Frequency scaling" (CONFIG_CPU_FREQ) should be enabled to configure cpufreq-stats. "CPU frequency translation statistics" (CONFIG_CPU_FREQ_STAT) provides the -basic statistics which includes time_in_state and total_trans. +statistics which includes time_in_state, total_trans and trans_table. -"CPU frequency translation statistics details" (CONFIG_CPU_FREQ_STAT_DETAILS) -provides fine grained cpufreq stats by trans_table. The reason for having a -separate config option for trans_table is: -- trans_table goes against the traditional /sysfs rule of one value per - interface. It provides a whole bunch of value in a 2 dimensional matrix - form. - -Once these two options are enabled and your CPU supports cpufrequency, you +Once this option is enabled and your CPU supports cpufrequency, you will be able to see the CPU frequency statistics in /sysfs. - - - - |