Michael Turquette 5c905a0861 sched: scheduler-driven cpu frequency selection ... Scheduler-driven CPU frequency selection hopes to exploit both per-task and global information in the scheduler to improve frequency selection policy, achieving lower power consumption, improved responsiveness/performance, and less reliance on heuristics and tunables. For further discussion on the motivation of this integration see [0]. This patch implements a shim layer between the Linux scheduler and the cpufreq subsystem. The interface accepts capacity requests from the CFS, RT and deadline sched classes. The requests from each sched class are summed on each CPU with a margin applied to the CFS and RT capacity requests to provide some headroom. Deadline requests are expected to be precise enough given their nature to not require headroom. The maximum total capacity request for a CPU in a frequency domain drives the requested frequency for that domain. Policy is determined by both the sched classes and this shim layer. Note that this algorithm is event-driven. There is no polling loop to check cpu idle time nor any other method which is unsynchronized with the scheduler, aside from a throttling mechanism to ensure frequency changes are not attempted faster than the hardware can accommodate them. Thanks to Juri Lelli <juri.lelli@arm.com> for contributing design ideas, code and test results, and to Ricky Liang <jcliang@chromium.org> for initialization and static key inc/dec fixes. [0] http://article.gmane.org/gmane.linux.kernel/1499836 [smuckle@linaro.org: various additions and fixes, revised commit text] CC: Ricky Liang <jcliang@chromium.org> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Juri Lelli <juri.lelli@arm.com> Signed-off-by: Steve Muckle <smuckle@linaro.org>		2016-09-14 14:58:22 +05:30
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accessibility
acpi	ACPI / osi: Fix an issue that acpi_osi=!* cannot disable ACPICA internal strings	2016-06-01 12:15:50 -07:00
amba
android	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-03-14 15:32:21 +08:00
ata	libata: LITE-ON CX1-JB256-HP needs lower max_sectors	2016-08-10 11:49:29 +02:00
atm
auxdisplay
base	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-07-29 21:38:37 +01:00
bcma	x86/quirks: Add early quirk to reset Apple AirPort card	2016-08-10 11:49:24 +02:00
block	nbd: ratelimit error msgs after socket close	2016-05-11 11:21:10 +02:00
bluetooth	Bluetooth: vhci: Fix race at creating hci device	2016-06-01 12:15:50 -07:00
bus	bus: imx-weim: Take the 'status' property value into account	2016-05-04 14:48:54 -07:00
cdrom
char	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-08-18 12:33:31 +08:00
clk	clk: rockchip: initialize flags of clk_init_data in mmc-phase clock	2016-08-10 11:49:28 +02:00
clocksource	clockevents/tcb_clksrc: Prevent disabling an already disabled clock	2016-03-03 15:07:15 -08:00
connector	connector: bump skb->users before callback invocation	2016-01-04 21:46:45 -05:00
cpufreq	sched: scheduler-driven cpu frequency selection	2016-09-14 14:58:22 +05:30
cpuidle	sched, cpuidle: Track cpuidle state index in the scheduler	2016-09-14 14:48:50 +05:30
crypto	crypto: qat - make qat_asym_algs.o depend on asn1 headers	2016-07-27 09:47:40 -07:00
dca
devfreq
dio
dma	dmaengine: at_xdmac: double FIFO flush needed to compute residue	2016-08-10 11:49:25 +02:00
dma-buf	CHROMIUM: android: fix warning when releasing active sync point	2016-02-16 13:53:25 -08:00
edac	EDAC, sb_edac: Fix rank lookup on Broadwell	2016-07-27 09:47:27 -07:00
eisa
extcon	extcon: max77843: Use correct size for reading the interrupt register	2016-05-04 14:48:54 -07:00
firewire
firmware	arm64: kaslr: increase randomization granularity	2016-07-29 18:59:49 +02:00
fmc
fpga
gpio	Revert "gpiolib: Split GPIO flags parsing and GPIO configuration"	2016-07-27 09:47:29 -07:00
gpu	Merge remote-tracking branch 'v4.4/topic/mm-kaslr-pax_usercopy' into linux-linaro-lsk-v4.4	2016-08-27 11:27:14 +08:00
hid	UPSTREAM: HID: core: prevent out-of-bound readings	2016-09-14 14:44:29 +05:30
hsi
hv	Drivers: hv: vmbus: Fix a Host signaling bug	2016-03-03 15:07:16 -08:00
hwmon	hwmon: (dell-smm) Cache fan_type() calls and change fan detection	2016-07-27 09:47:37 -07:00
hwspinlock	drivers/hwspinlock: fix race between radix tree insertion and lookup	2016-02-25 12:01:23 -08:00
hwtracing	Merge tag 'v4.4.17' into linux-linaro-lsk-v4.4	2016-08-11 12:15:51 +08:00
i2c	i2c: i801: Allow ACPI SystemIO OpRegion to conflict with PCI BAR	2016-08-16 09:30:48 +02:00
ide
idle	intel_idle: prevent SKL-H boot failure when C8+C9+C10 enabled	2016-04-12 09:09:05 -07:00
iio	iio:ad7266: Fix probe deferral for vref	2016-07-27 09:47:37 -07:00
infiniband	IB/mlx4: Properly initialize GRH TClass and FlowLabel in AHs	2016-07-27 09:47:27 -07:00
input	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-08-11 12:15:55 +08:00
iommu	iommu/amd: Fix unity mapping initialization race	2016-07-27 09:47:32 -07:00
ipack
irqchip	irqchip/gic-v3: Configure all interrupts as non-secure Group-1	2016-06-01 12:15:49 -07:00
isdn	ser_gigaset: remove unnecessary kfree() calls from release method	2015-12-15 13:24:21 -05:00
leds
lguest
lightnvm	lightnvm: wrong offset in bad blk lun calculation	2015-12-29 08:28:32 -07:00
macintosh
mailbox
mcb	mcb: Fixed bar number assignment for the gdd	2016-06-01 12:15:53 -07:00
md	ANDROID: dm: android-verity: Allow android-verity to be compiled as an independent module	2016-09-14 14:26:20 +05:30
media	UPSTREAM: [media] xc2028: unlock on error in xc2028_set_config()	2016-09-14 14:26:32 +05:30
memory	memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing	2016-07-27 09:47:35 -07:00
memstick
message
mfd	mfd: intel_soc_pmic_core: Terminate panel control GPIO lookup table correctly	2016-06-07 18:14:34 -07:00
misc	Implement memory_state_time, used by qcom,cpubw	2016-08-18 18:56:03 +05:30
mmc	Android: MMC/UFS IO Latency Histograms.	2016-09-14 14:43:34 +05:30
mtd	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-07-29 21:38:37 +01:00
net	BACKPORT: brcmfmac: defer DPC processing during probe	2016-08-18 18:56:03 +05:30
nfc
ntb
nubus
nvdimm	libnvdimm, pfn: fix uuid validation	2016-04-20 15:41:54 +09:00
nvme	NVMe: IO ending fixes on surprise removal	2015-12-22 10:12:04 -07:00
nvmem	nvmem: mxs-ocotp: fix buffer overflow in read	2016-05-11 11:21:21 +02:00
of	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-07-29 21:38:37 +01:00
oprofile
parisc	parisc iommu: fix panic due to trying to allocate too large region	2015-12-12 16:07:25 +01:00
parport
pci	PCI: Disable all BAR sizing for devices with non-compliant BARs	2016-06-07 18:14:35 -07:00
pcmcia	pcmcia: db1xxx_ss: fix last irq_to_gpio user	2016-04-20 15:42:09 +09:00
perf
phy	phy: core: fix wrong err handle for phy_power_on	2016-03-03 15:07:28 -08:00
pinctrl	pinctrl: imx: Do not treat a PIN without MUX register as an error	2016-08-10 11:49:27 +02:00
platform	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-08-11 12:15:55 +08:00
pnp	PNP: Add Broadwell to Intel MCH size workaround	2016-08-16 09:30:48 +02:00
power	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-08-11 12:15:55 +08:00
powercap	powercap / RAPL: fix BIOS lock check	2015-12-12 02:31:11 +01:00
pps	pps: do not crash when failed to register	2016-08-10 11:49:25 +02:00
ps3
ptp
pwm	pwm: brcmstb: Fix check of devm_ioremap_resource() return code	2016-05-04 14:48:47 -07:00
rapidio
ras
regulator	regulator: axp20x: Fix axp22x ldo_io voltage ranges	2016-05-18 17:06:51 -07:00
remoteproc
reset
rpmsg
rtc	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-05-12 09:27:18 +08:00
s390	qeth: delete napi struct when removing a qeth device	2016-08-10 11:49:28 +02:00
sbus
scsi	Android: MMC/UFS IO Latency Histograms.	2016-09-14 14:43:34 +05:30
sfi
sh	drivers: sh: Restore legacy clock domain on SuperH platforms	2016-03-09 15:34:49 -08:00
sn
soc	soc: rockchip: power-domain: fix err handle while probing	2016-05-11 11:21:11 +02:00
spi	spi: sun4i: fix FIFO limit	2016-08-10 11:49:28 +02:00
spmi
ssb
staging	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-08-18 12:33:31 +08:00
target	target: Fix target_release_cmd_kref shutdown comp leak	2016-04-12 09:09:02 -07:00
tc
thermal	thermal: cpu_cooling: fix improper order during initialization	2016-07-27 09:47:29 -07:00
thunderbolt	thunderbolt: Fix double free of drom buffer	2016-06-01 12:15:53 -07:00
tty	UPSTREAM: tty: Prevent ldisc drivers from re-using stale tty fields	2016-09-14 14:44:29 +05:30
uio
usb	UPSTREAM: usb: gadget: configfs: add mutex lock before unregister gadget	2016-08-18 18:56:03 +05:30
uwb
vfio	vfio: fix ioctl error handling	2016-03-09 15:34:50 -08:00
vhost	vhost: replace % with & on data path	2015-12-07 17:28:10 +02:00
video	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-05-12 09:27:18 +08:00
virt
virtio	virtio_balloon: fix PFN format for virtio-1	2016-07-27 09:47:34 -07:00
vlynq
vme
w1	w1: ds2482: Manage SLPZ pin sleep state	2016-02-16 13:54:18 -08:00
watchdog	watchdog: rc32434_wdt: fix ioctl error handling	2016-04-12 09:08:54 -07:00
xen	xenbus: don't bail early from xenbus_dev_request_and_reply()	2016-08-10 11:49:26 +02:00
zorro
Kconfig	Revert "switch: switch class and GPIO drivers."	2016-05-19 12:32:41 +05:30
Makefile	Revert "switch: switch class and GPIO drivers."	2016-05-19 12:32:41 +05:30