From: Dongdong Yang <yangdongdong@xxxxxxxxxx> This patch provides USF(User Sensitive Feedback factor) auxiliary cpufreq governor to support high level layer sysfs inodes setting for utils adjustment purpose from the identified scenario on portable equipment. Because the power consumption and UI response are more cared for by portable equipment users. And the "screen off" status stands for no request from the user, however, the kernel is still expected to notify the user in time on modem, network or powerkey events occur. USF provides "sched_usf_non_ux_r" sysfs inode to cut down the utils from user space tasks according to high level scenario. In addition, it usually hints more cpufreq demand that the preemptive counts of the tasks on the cpu burst and over the user expecting completed time such as the ratio sysctl_sched_latency to sysctl_sched_min_granularity on "screen on" status, which more likely with more UI. The sysfs inodes "sched_usf_up_l0_r" and "sched_usf_down_r" have been provided to adjust the utils according to high level identified scenario to alloc the cpufreq in time. Changes in v3 - Move usf.c to kernel/sched. - Remove trace_printk and debugfs. - Add document draft. - Update comments. Changes in v2 - Add adjust_task_pred_set switch. - Move adjust_task_pred_demand declaration into sched.h - Update comments. Dongdong Yang (1): sched: Provide USF for the portable equipment. Documentation/scheduler/sched-ufs.txt | 78 +++++++++ drivers/cpufreq/Kconfig | 11 ++ drivers/staging/Kconfig | 2 + drivers/staging/Makefile | 1 + include/trace/events/sched.h | 35 ++++ kernel/sched/Makefile | 1 + kernel/sched/cpufreq_schedutil.c | 3 + kernel/sched/sched.h | 10 ++ kernel/sched/usf.c | 305 ++++++++++++++++++++++++++++++++++ 9 files changed, 446 insertions(+) create mode 100644 Documentation/scheduler/sched-ufs.txt create mode 100644 kernel/sched/usf.c -- 2.7.4 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
