scheduler: cpuacct: Enable platform hooks to track cpuusage for CPU frequencies
authorMike Chan <mike@android.com>
Tue, 11 May 2010 00:54:48 +0000 (17:54 -0700)
committerDan Willemsen <dwillemsen@nvidia.com>
Thu, 1 Dec 2011 05:38:19 +0000 (21:38 -0800)
commit9075fa48d0b4453038b53a12d2a474312bf68742
tree21f99da00bb58be1bbdc3c81757a5396186942ed
parent7c89b4e2329d72a84e756028084b722e63103267
scheduler: cpuacct: Enable platform hooks to track cpuusage for CPU frequencies

Introduce new platform callback hooks for cpuacct for tracking CPU frequencies

Not all platforms / architectures have a set CPU_FREQ_TABLE defined
for CPU transition speeds. In order to track time spent in at various
CPU frequencies, we enable platform callbacks from cpuacct for this accounting.

Architectures that support overclock boosting, or don't have pre-defined
frequency tables can implement their own bucketing system that makes sense
given their cpufreq scaling abilities.

New file:
cpuacct.cpufreq reports the CPU time (in nanoseconds) spent at each CPU
frequency.

Change-Id: I10a80b3162e6fff3a8a2f74dd6bb37e88b12ba96
Signed-off-by: Mike Chan <mike@android.com>
Documentation/cgroups/cpuacct.txt
include/linux/cpuacct.h [new file with mode: 0644]
kernel/sched.c