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f889491380
kernel_optimize_test/drivers
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Jason Wang f889491380 vhost: introduce O(1) vq metadata cache 
When device IOTLB is enabled, all address translations were stored in
interval tree. O(lgN) searching time could be slow for virtqueue
metadata (avail, used and descriptors) since they were accessed much
often than other addresses. So this patch introduces an O(1) array
which points to the interval tree nodes that store the translations of
vq metadata. Those array were update during vq IOTLB prefetching and
were reset during each invalidation and tlb update. Each time we want
to access vq metadata, this small array were queried before interval
tree. This would be sufficient for static mappings but not dynamic
mappings, we could do optimizations on top.

Test were done with l2fwd in guest (2M hugepage):

   noiommu  | before        | after
tx 1.32Mpps | 1.06Mpps(82%) | 1.30Mpps(98%)
rx 2.33Mpps | 1.46Mpps(63%) | 2.29Mpps(98%)

We can almost reach the same performance as noiommu mode.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-02 01:35:06 +02:00
..
accessibility
acpi Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2017-02-06 19:36:04 -08:00
amba
android
ata ata: sata_mv:- Handle return value of devm_ioremap. 2017-01-06 15:45:32 -05:00
atm Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
auxdisplay auxdisplay: fix new ht16k33 build errors 2017-01-11 09:27:30 +01:00
base Merge branches 'pm-core-fixes' and 'pm-cpufreq-fixes' 2017-02-06 14:52:10 +01:00
bcma Revert "bcma: init serial console directly from ChipCommon code" 2017-01-17 14:23:44 +02:00
block virtio_blk: use virtio IRQ affinity 2017-02-27 20:54:05 +02:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-12-16 10:24:44 -08:00
bus cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
cdrom Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
char virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
clk One fix for Samsung Exynos524x SoCs where recent IOMMU patches have 2017-01-21 18:46:45 -08:00
clocksource clocksource/exynos_mct: Clear interrupt when cpu is shut down 2017-01-17 10:08:38 +01:00
connector
cpufreq Merge branches 'pm-core-fixes' and 'pm-cpufreq-fixes' 2017-02-06 14:52:10 +01:00
cpuidle Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
crypto virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
dax libnvdimm for 4.10 2016-12-18 15:49:10 -08:00
dca
devfreq PM / devfreq: exynos-bus: Fix the wrong return value 2017-01-03 00:21:45 +01:00
dio Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
dma dmaengine: pl330: fix double lock 2017-01-25 15:35:11 +05:30
dma-buf
edac Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
eisa
extcon extcon: return error code on failure 2017-01-11 09:11:39 +01:00
firewire
firmware efi/fdt: Avoid FDT manipulation after ExitBootServices() 2017-02-01 21:17:49 +01:00
fmc
fpga
gpio gpio: provide lockdep keys for nested/unnested irqchips 2017-01-19 09:57:20 +01:00
gpu virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
hid HID: cp2112: fix gpio-callback error handling 2017-01-31 12:59:33 +01:00
hsi
hv Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read() 2017-01-31 10:59:48 +01:00
hwmon hwmon: (lm90) fix temp1_max_alarm attribute 2017-01-02 10:15:28 -08:00
hwspinlock
hwtracing coresight/etm3/4x: Consolidate hotplug state space 2016-12-25 10:47:44 +01:00
i2c Revert "i2c: designware: detect when dynamic tar update is possible" 2017-02-14 22:10:26 +01:00
ide Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
idle
iio iio: dht11: Use usleep_range instead of msleep for start signal 2017-01-22 13:35:40 +00:00
infiniband IB/rxe: Fix mem_check_range integer overflow 2017-02-08 12:28:30 -05:00
input Input: elan_i2c - add ELAN0605 to the ACPI table 2017-02-12 18:36:49 -08:00
iommu IOMMU Fixes for Linux v4.10-rc2 2017-01-06 10:49:36 -08:00
ipack
irqchip irqchip/mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND 2016-12-31 19:06:44 +00:00
isdn ISDN: eicon: silence misleading array-bounds warning 2017-01-27 11:27:34 -05:00
leds cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
lguest Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
lightnvm
macintosh Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mailbox ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
mcb
md dm crypt: replace RCU read-side section with rwsem 2017-02-03 10:26:14 -05:00
media media fixes for v4.10-rc9 2017-02-16 10:22:41 -08:00
memory
memstick drivers/memstick/core/memstick.c: avoid -Wnonnull warning 2017-01-24 16:26:14 -08:00
message Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mfd - New Device Support 2016-12-19 08:16:26 -08:00
misc virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
mmc mmc: core: fix multi-bit bus width without high-speed mode 2017-02-14 08:50:10 +01:00
mtd mtd: nand: lpc32xx: fix invalid error handling of a requested irq 2017-01-04 20:50:18 +01:00
net virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
nfc
ntb ntb: ntb_hw_intel: link_poll isn't clearing the pending status properly 2017-02-16 23:11:26 -05:00
nubus Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
nvdimm libnvdimm, pfn: fix memmap reservation size versus 4K alignment 2017-02-04 14:47:31 -08:00
nvme nvme-fc: use blk_rq_nr_phys_segments 2017-01-26 17:49:14 +02:00
nvmem nvmem: fix nvmem_cell_read() return type doc 2017-01-04 18:22:47 +01:00
of
oprofile Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
parisc Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
parport parisc, parport_gsc: Fixes for printk continuation lines 2017-01-28 21:54:21 +01:00
pci PCI/PME: Restore pcie_pme_driver.remove 2017-02-15 09:39:32 -06:00
pcmcia
perf cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
phy
pinctrl pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler 2017-01-30 15:53:57 +01:00
platform platform/x86: ideapad-laptop: handle ACPI event 1 2017-01-22 12:47:06 +02:00
pnp Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
power ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
powercap
pps
ps3
ptp
pwm
rapidio
ras
regulator regulator: Fixes for v4.10 2017-02-03 13:46:38 -08:00
remoteproc virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
reset reset: fix shared reset triggered_count decrement on error 2017-02-17 08:11:47 +01:00
rpmsg virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
rtc rtc: jz4740: make the driver buildable as a module again 2017-01-26 23:03:21 +01:00
s390 virtio: allow drivers to request IRQ affinity when creating VQs 2017-02-27 20:54:04 +02:00
sbus Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
scsi virtio_scsi: use virtio IRQ affinity 2017-02-27 20:54:06 +02:00
sfi
sh
sn
soc soc: ti: wkup_m3_ipc: Fix error return code in wkup_m3_ipc_probe() 2017-01-12 13:37:49 -08:00
spi spi: Fixes for v4.10 2017-01-20 12:25:11 -08:00
spmi
ssb
staging mm: avoid returning VM_FAULT_RETRY from ->page_mkwrite handlers 2017-02-08 15:41:43 -08:00
target target: Fix COMPARE_AND_WRITE ref leak for non GOOD status 2017-02-08 08:25:39 -08:00
tc
thermal Revert "thermal: thermal_hwmon: Convert to hwmon_device_register_with_info()" 2017-01-25 09:51:08 +08:00
thunderbolt
tty sysrq: attach sysrq handler correctly for 32-bit kernel 2017-01-11 09:22:54 +01:00
uio
usb USB-serial fixes for v4.10-rc7 2017-02-03 22:19:15 +01:00
uwb
vfio vfio/spapr_tce: Set window when adding additional groups to container 2017-02-07 11:48:16 -07:00
vhost vhost: introduce O(1) vq metadata cache 2017-03-02 01:35:06 +02:00
video fbdev: color map copying bounds checking 2017-01-24 16:26:14 -08:00
virt
virtio virtio: provide a method to get the IRQ affinity mask for a virtqueue 2017-02-27 20:54:05 +02:00
vlynq
vme vme: Fix wrong pointer utilization in ca91cx42_slave_get 2017-01-11 10:42:16 +01:00
w1
watchdog Watchdog updates for v4.10 2016-12-24 11:27:45 -08:00
xen Merge branch 'stable/for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 2017-01-27 12:17:07 -08:00
zorro Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
Kconfig
Makefile