summaryrefslogtreecommitdiffstats
path: root/usr
diff options
context:
space:
mode:
authorThara Gopinath <thara.gopinath@linaro.org>2020-02-21 19:52:05 -0500
committerIngo Molnar <mingo@kernel.org>2020-03-06 12:57:17 +0100
commit765047932f153265db6ef15be208d6cbfc03dc62 (patch)
tree49fd26bb4ce13c8af9bbdde8bf4ce9ed70f62565 /usr
parentf1dfdab694eb3838ac26f4b73695929c07d92a33 (diff)
downloadlinux-stable-765047932f153265db6ef15be208d6cbfc03dc62.tar.gz
linux-stable-765047932f153265db6ef15be208d6cbfc03dc62.tar.bz2
linux-stable-765047932f153265db6ef15be208d6cbfc03dc62.zip
sched/pelt: Add support to track thermal pressure
Extrapolating on the existing framework to track rt/dl utilization using pelt signals, add a similar mechanism to track thermal pressure. The difference here from rt/dl utilization tracking is that, instead of tracking time spent by a CPU running a RT/DL task through util_avg, the average thermal pressure is tracked through load_avg. This is because thermal pressure signal is weighted time "delta" capacity unlike util_avg which is binary. "delta capacity" here means delta between the actual capacity of a CPU and the decreased capacity a CPU due to a thermal event. In order to track average thermal pressure, a new sched_avg variable avg_thermal is introduced. Function update_thermal_load_avg can be called to do the periodic bookkeeping (accumulate, decay and average) of the thermal pressure. Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20200222005213.3873-2-thara.gopinath@linaro.org
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions