Marcelo Tosatti 2cffe9f6b9 cpuidle: add haltpoll governor ... The cpuidle_haltpoll governor, in conjunction with the haltpoll cpuidle driver, allows guest vcpus to poll for a specified amount of time before halting. This provides the following benefits to host side polling: 1) The POLL flag is set while polling is performed, which allows a remote vCPU to avoid sending an IPI (and the associated cost of handling the IPI) when performing a wakeup. 2) The VM-exit cost can be avoided. The downside of guest side polling is that polling is performed even with other runnable tasks in the host. Results comparing halt_poll_ns and server/client application where a small packet is ping-ponged: host --> 31.33 halt_poll_ns=300000 / no guest busy spin --> 33.40 (93.8%) halt_poll_ns=0 / guest_halt_poll_ns=300000 --> 32.73 (95.7%) For the SAP HANA benchmarks (where idle_spin is a parameter of the previous version of the patch, results should be the same): hpns == halt_poll_ns idle_spin=0/ idle_spin=800/ idle_spin=0/ hpns=200000 hpns=0 hpns=800000 DeleteC06T03 (100 thread) 1.76 1.71 (-3%) 1.78 (+1%) InsertC16T02 (100 thread) 2.14 2.07 (-3%) 2.18 (+1.8%) DeleteC00T01 (1 thread) 1.34 1.28 (-4.5%) 1.29 (-3.7%) UpdateC00T03 (1 thread) 4.72 4.18 (-12%) 4.53 (-5%) Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2019-07-30 17:27:37 +02:00
..
ABI	platform/x86: asus: Rename "fan mode" to "fan boost mode"	2019-07-17 19:07:58 +03:00
EDID	docs: driver-api: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
PCI	docs: powerpc: convert docs to ReST and rename to *.rst	2019-07-17 06:57:51 -03:00
RCU	docs: fix broken doc references due to renames	2019-07-17 06:57:51 -03:00
accounting	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
acpi/dsd	docs: fix broken documentation links	2019-06-08 13:42:13 -06:00
admin-guide	This is mostly a set of follow-on fixes from Mauro fixing various fallout	2019-07-26 11:29:24 -07:00
arm	docs: arm: fix a breakage with pdf output	2019-07-15 11:03:04 -03:00
arm64	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
auxdisplay	docs: admin-guide: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
block	docs conversion for v5.3-rc1	2019-07-16 12:21:41 -07:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
cdrom	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
core-api	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
cpu-freq	docs: power: convert docs to ReST and rename to *.rst	2019-06-14 16:08:36 -05:00
crypto	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
dev-tools	Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauro	2019-07-22 13:51:20 -06:00
devicetree	USB fixes for 5.3-rc2	2019-07-28 09:52:35 -07:00
doc-guide	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
driver-api	docs: phy: Drop duplicate 'be made'	2019-07-26 08:15:26 -06:00
fault-injection	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
fb	docs conversion for v5.3-rc1	2019-07-16 12:21:41 -07:00
features	Documentation/stackprotector: powerpc supports stack protector	2019-06-14 14:44:43 -06:00
filesystems	Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauro	2019-07-22 13:51:20 -06:00
firmware-guide	docs: gpio: add sysfs interface to the admin-guide	2019-07-15 11:03:03 -03:00
firmware_class	…
fpga	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
gpu	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
hid	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
hwmon	hwmon: (k8temp) documentation: update URL of datasheet	2019-07-21 19:18:45 -07:00
i2c	Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-07-15 21:10:39 -07:00
ia64	docs: add SPDX tags to new index files	2019-07-15 11:03:03 -03:00
ide	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
iio	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
infiniband	docs: infiniband: add it to the driver-api bookset	2019-07-08 14:22:56 -03:00
input	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
ioctl	docs: ioctl: add it to the uAPI guide	2019-07-15 09:20:28 -03:00
isdn	isdn: remove isdn4linux	2019-05-31 11:13:10 +02:00
kbuild	Kbuild updates for v5.3 (2nd)	2019-07-20 09:34:55 -07:00
kernel-hacking	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
leds	docs: leds: add it to the driver-api book	2019-07-15 09:20:28 -03:00
livepatch	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
locking	docs: fix broken doc references due to renames	2019-07-17 06:57:51 -03:00
m68k	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
maintainer	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
media	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
mic	docs: driver-api: add remaining converted dirs to it	2019-07-15 11:03:03 -03:00
mips	…
misc-devices	docs: misc-devices: convert files without extension to ReST	2019-07-03 21:09:41 +02:00
netlabel	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
networking	Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauro	2019-07-22 13:51:20 -06:00
nios2	…
openrisc	…
parisc	…
pcmcia	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
power	Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauro	2019-07-22 13:51:20 -06:00
powerpc	docs: powerpc: convert docs to ReST and rename to *.rst	2019-07-17 06:57:51 -03:00
process	Wimplicit-fallthrough patches for 5.3-rc2	2019-07-27 11:04:18 -07:00
riscv	RISC-V updates for v5.3	2019-07-18 12:26:59 -07:00
s390	Fixes in vfio-ccw for older and newer issues.	2019-07-23 10:44:28 +02:00
scheduler	docs conversion for v5.3-rc1	2019-07-16 12:21:41 -07:00
scsi	scsi: ufs: Documentation: Announce ufs-tool v1.0	2019-06-26 22:47:51 -04:00
security	docs: security: move some books to it and update	2019-07-15 11:03:01 -03:00
sh	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
sound	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
sparc	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
sphinx	docs: load_config.py: ensure subdirs end with "/"	2019-07-19 08:49:27 -03:00
sphinx-static	…
spi	…
target	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
thermal	docs: thermal: convert to ReST	2019-06-27 21:22:15 +08:00
timers	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
trace	The main changes in this release include:	2019-07-18 11:51:00 -07:00
translations	doc:it_IT: translations in process/	2019-07-22 14:47:02 -06:00
usb	docs: usb: rename files to .rst and add them to drivers-api	2019-06-20 14:28:36 +02:00
userspace-api	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
virt	This is mostly a set of follow-on fixes from Mauro fixing various fallout	2019-07-26 11:29:24 -07:00
virtual	cpuidle: add haltpoll governor	2019-07-30 17:27:37 +02:00
vm	Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauro	2019-07-22 13:51:20 -06:00
w1	docs: driver-api: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
watchdog	Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauro	2019-07-22 13:51:20 -06:00
wimax	…
x86	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
xtensa	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
.gitignore	…
COPYING-logo	docs: logo.txt: rename it to COPYING-logo	2019-07-15 09:20:27 -03:00
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	docs: DMA-API-HOWTO.txt: fix an unmarked code block	2019-07-15 09:20:24 -03:00
DMA-API.txt	Documentation: DMA-API: fix a function name of max_mapping_size	2019-06-07 11:10:33 -06:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Kconfig	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
Makefile	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
SubmittingPatches	…
atomic_bitops.txt	…
atomic_t.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 16:12:03 -07:00
bus-virt-phys-mapping.txt	…
conf.py	docs: conf.py: only use CJK if the font is available	2019-07-17 06:57:51 -03:00
crc32.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
digsig.txt	…
docutils.conf	doc-rst: Add missing newline at end of file	2019-06-20 14:16:56 -06:00
dontdiff	kbuild: create *.mod with full directory path and remove MODVERDIR	2019-07-18 02:19:31 +09:00
futex-requeue-pi.txt	…
hwspinlock.txt	hwspinlock: add the 'in_atomic' API	2019-06-29 21:08:14 -07:00
index.rst	docs: virtual: add it to the documentation body	2019-07-17 06:57:52 -03:00
io-mapping.txt	…
io_ordering.txt	…
irqflags-tracing.txt	…
kobject.txt	…
kprobes.txt	…
kref.txt	…
logo.gif	…
lzo.txt	…
mailbox.txt	…
memory-barriers.txt	docs: fix broken doc references due to renames	2019-07-17 06:57:51 -03:00
nommu-mmap.txt	…
packing.txt	…
padata.txt	…
percpu-rw-semaphore.txt	…
pi-futex.txt	docs: locking: convert docs to ReST and rename to *.rst	2019-07-15 08:53:27 -03:00
preempt-locking.txt	…
rbtree.txt	docs: rbtree.txt: fix Sphinx build warnings	2019-07-15 09:20:24 -03:00
remoteproc.txt	remoteproc: add vendor resources handling	2019-06-29 12:02:17 -07:00
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	…
speculation.txt	…
static-keys.txt	…
tee.txt	Documentation: tee: Grammar s/the its/its/	2019-06-07 11:23:38 -06:00
this_cpu_ops.txt	…
unaligned-memory-access.txt	…
xz.txt	…