On Fri, Jan 06, 2012 at 02:36:20AM +0200, Antti P Miettinen wrote: > The inspiration for this patch series is the N9 CPU frequency boost > upon input events: > > http://www.spinics.net/lists/cpufreq/msg00667.html > > and the related changes in git://codeaurora.org/kernel/msm.git tree. > Those patches modify the ondemand cpufreq governor. This patch series > adds minimum and maximum CPU frequency as PM QoS parameters and > modifies the cpufreq core to enforce the PM QoS limits. There is also > an example module for boosting the frequency upon input events. > > I've been testing these changes against Ubuntu 3.2 kernel on a Dell > E6420 with the ACPI cpufreq driver. The patches are against > linux-next/master, compile tested against it. wow, isn't this is timely :) I was working on the same thing. I used different names. FWIW our issue is motivated by some graphics workloads that get starved for frames because the cpufreq governor sees nothing by < 50% CPU use so it pushes the cpu into a low P-state which doesn't have throughput to feed the next frame of OpenGL data before the next frame time. This is pretty common for some graphics workloads. I look forward to reviewing you path set! --mark > --Antti > > Alex Frid (1): > PM QoS: Simplify PM QoS expansion/merge > > Antti P Miettinen (5): > PM QoS: Add CPU frequency min/max as PM QoS params > cpufreq: Export user_policy min/max > cpufreq: Preserve sysfs min/max request > cpufreq: Enforce PM QoS min/max limits > input: CPU frequency booster > > drivers/cpufreq/cpufreq.c | 57 +++++++++++++- > drivers/input/Kconfig | 9 ++ > drivers/input/Makefile | 1 + > drivers/input/input-cfboost.c | 174 +++++++++++++++++++++++++++++++++++++++++ > include/linux/pm_qos.h | 19 ++++- > kernel/power/qos.c | 55 ++++++++++---- > 6 files changed, 293 insertions(+), 22 deletions(-) > create mode 100644 drivers/input/input-cfboost.c > > -- > 1.7.4.1 > > _______________________________________________ > linux-pm mailing list > linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linuxfoundation.org/mailman/listinfo/linux-pm _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
