On Thu, 14 Dec 2023 at 09:21, Lukasz Luba <lukasz.luba@xxxxxxx> wrote: > > Hi Vincent, > > I've been waiting for this feature, thanks! > > > On 12/12/23 14:27, Vincent Guittot wrote: > > Following the consolidation and cleanup of CPU capacity in [1], this serie > > reworks how the scheduler gets the pressures on CPUs. We need to take into > > account all pressures applied by cpufreq on the compute capacity of a CPU > > for dozens of ms or more and not only cpufreq cooling device or HW > > mitigiations. we split the pressure applied on CPU's capacity in 2 parts: > > - one from cpufreq and freq_qos > > - one from HW high freq mitigiation. > > > > The next step will be to add a dedicated interface for long standing > > capping of the CPU capacity (i.e. for seconds or more) like the > > scaling_max_freq of cpufreq sysfs. The latter is already taken into > > account by this serie but as a temporary pressure which is not always the > > best choice when we know that it will happen for seconds or more. > > > > [1] https://lore.kernel.org/lkml/20231211104855.558096-1-vincent.guittot@xxxxxxxxxx/ > > > > Vincent Guittot (4): > > cpufreq: Add a cpufreq pressure feedback for the scheduler > > sched: Take cpufreq feedback into account > > thermal/cpufreq: Remove arch_update_thermal_pressure() > > sched: Rename arch_update_thermal_pressure into > > arch_update_hw_pressure > > > > arch/arm/include/asm/topology.h | 6 +-- > > arch/arm64/include/asm/topology.h | 6 +-- > > drivers/base/arch_topology.c | 26 ++++----- > > drivers/cpufreq/cpufreq.c | 48 +++++++++++++++++ > > drivers/cpufreq/qcom-cpufreq-hw.c | 4 +- > > drivers/thermal/cpufreq_cooling.c | 3 -- > > include/linux/arch_topology.h | 8 +-- > > include/linux/cpufreq.h | 10 ++++ > > include/linux/sched/topology.h | 8 +-- > > .../{thermal_pressure.h => hw_pressure.h} | 14 ++--- > > include/trace/events/sched.h | 2 +- > > init/Kconfig | 12 ++--- > > kernel/sched/core.c | 8 +-- > > kernel/sched/fair.c | 53 ++++++++++--------- > > kernel/sched/pelt.c | 18 +++---- > > kernel/sched/pelt.h | 16 +++--- > > kernel/sched/sched.h | 4 +- > > 17 files changed, 152 insertions(+), 94 deletions(-) > > rename include/trace/events/{thermal_pressure.h => hw_pressure.h} (55%) > > > > I would like to test it, but something worries me. Why there is 0/5 in > this subject and only 4 patches? I removed a patch from the series but copied/pasted the cover letter subject without noticing the /5 instead of /4 > > Could you tell me your base branch that I can apply this, please? It applies on top of tip/sched/core + [1] and you can find it here: https://git.linaro.org/people/vincent.guittot/kernel.git/log/?h=sched/system-pressure > > Regards, > Lukasz
