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9445e1e15e
qemu/include/hw
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Stefan Hajnoczi 9445e1e15e virtio-blk-pci: default num_queues to -smp N 
Automatically size the number of virtio-blk-pci request virtqueues to
match the number of vCPUs.  Other transports continue to default to 1
request virtqueue.

A 1:1 virtqueue:vCPU mapping ensures that completion interrupts are
handled on the same vCPU that submitted the request.  No IPI is
necessary to complete an I/O request and performance is improved.  The
maximum number of MSI-X vectors and virtqueues limit are respected.

Performance improves from 78k to 104k IOPS on a 32 vCPU guest with 101
virtio-blk-pci devices (ioengine=libaio, iodepth=1, bs=4k, rw=randread
with NVMe storage).

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Message-Id: <20200818143348.310613-7-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-27 08:29:13 -04:00
..
acpi Introduce a new flag for i440fx to disable PCI hotplug on the root bus 2020-08-27 08:29:08 -04:00
adc include: Make headers more self-contained 2019-08-16 13:31:51 +02:00
arm hw/arm/smmuv3: Support HAD and advertise SMMUv3.1 support 2020-08-24 10:02:06 +01:00
audio qom: Put name parameter before value / visitor parameter 2020-07-10 15:18:08 +02:00
block virtio,acpi,pci: fixes, cleanups. 2020-06-25 16:52:42 +01:00
char hw/char: Convert the Ibex UART to use the registerfields API 2020-07-13 17:25:37 -07:00
core cputlb: ensure we save the IOTLB data in case of reset 2020-07-15 11:52:43 +01:00
cpu Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
cris sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
display qom/object: Move Object typedef to 'qemu/typedefs.h' 2020-06-10 12:09:36 -04:00
dma hw/arm/bcm283x: Correct the license text 2020-03-23 17:22:30 +00:00
firmware machine: Refactor smp-related call chains to pass MachineState 2019-07-05 17:07:36 -03:00
gpio nrf51: Fix last GPIO CNF address 2020-04-30 11:52:27 +01:00
hyperv hyperv: vmbus: Remove the 2nd IRQ 2020-06-26 09:39:40 -04:00
i2c hw/i2c: Document the I2C qdev helpers 2020-07-16 12:30:54 -05:00
i386 hw: add compat machines for 5.2 2020-08-19 10:45:48 -04:00
ide hw/ide: Make IDEDMAOps handlers take a const IDEDMA pointer 2020-06-17 14:53:39 +02:00
input adb: add autopoll_blocked variable to block autopoll 2020-06-26 10:13:51 +01:00
intc hw/intc: ibex_plic: Don't allow repeat interrupts on claimed lines 2020-08-21 22:37:55 -07:00
ipack Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
ipmi ipmi: Add support to customize OEM functions 2019-12-17 10:39:47 +11:00
isa isa: isa_create(), isa_try_create() are now unused, drop 2020-06-15 22:05:28 +02:00
kvm Supply missing header guards 2019-06-12 13:20:21 +02:00
lm32 Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
m68k m68k: Add NeXTcube machine 2019-09-07 08:31:51 +02:00
mem hw/acpi/nvdimm: add a helper to augment SRAT generation 2020-06-09 11:17:59 -04:00
mips Include hw/irq.h a lot less 2019-08-16 13:31:52 +02:00
misc hw/misc: avr: Add limited support for power reduction device 2020-07-11 11:02:05 +02:00
net Add a phy-num property to the i.MX FEC emulator 2020-07-03 16:59:41 +01:00
nubus hw/m68k: add Nubus support 2019-10-28 19:06:47 +01:00
nvram nvram: Exit QEMU if NVRAM cannot contain all -prom-env data 2020-08-14 13:34:31 +10:00
pci hw/pci-host: save/restore pci host config register 2020-07-27 10:24:39 -04:00
pci-bridge Supply missing header guards 2019-06-12 13:20:21 +02:00
pci-host spapr: Add a new level of NUMA for GPUs 2020-07-20 09:21:39 +10:00
ppc spapr/xive: Simplify error handling of kvmppc_xive_cpu_synchronize_state() 2020-08-13 21:09:38 +10:00
rdma {hmp, hw/pvrdma}: Expose device internals via monitor interface 2019-03-16 15:52:44 +02:00
riscv hw/riscv: virt: Allow creating multiple NUMA sockets 2020-08-25 09:11:35 -07:00
rtc goldfish_rtc: Fix non-atomic read behaviour of TIME_LOW/TIME_HIGH 2020-07-22 09:39:46 -07:00
rx hw/rx: Add RX GDB simulator 2020-06-22 18:37:12 +02:00
s390x s390x/css: Refactor the css_queue_crw() routine 2020-06-18 12:13:54 +02:00
scsi qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
sd hw/sd: Add sdbus_read_data() to read multiples bytes on the data line 2020-08-21 16:35:35 +02:00
semihosting semihosting: add qemu_semihosting_console_inc for SYS_READC 2020-01-09 11:41:29 +00:00
sh4 hw/sh4: Extract timer definitions to 'hw/timer/tmu012.h' 2020-06-22 18:37:12 +02:00
southbridge hw/ide: Do ide_drive_get() within pci_ide_create_devs() 2020-03-17 12:22:36 -04:00
sparc Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
ssi Replace uses of FROM_SSI_SLAVE() macro with QOM casts 2020-07-03 16:59:46 +01:00
timer hw/timer: avr: Add limited support for 16-bit timer peripheral 2020-07-11 11:02:05 +02:00
tricore Include hw/irq.h a lot less 2019-08-16 13:31:52 +02:00
unicore32 hw/unicore32: restrict hw addr defines to source file 2017-12-18 17:07:02 +03:00
usb exec/cpu-common: Move MUSB specific typedefs to 'hw/usb/hcd-musb.h' 2020-06-12 11:20:15 -04:00
vfio vfio: Convert to ram_block_discard_disable() 2020-07-02 05:54:59 -04:00
virtio virtio-blk-pci: default num_queues to -smp N 2020-08-27 08:29:13 -04:00
watchdog hw/watchdog: Implement full i.MX watchdog support 2020-05-21 20:00:18 +01:00
xen accel: Move Xen accelerator code under accel/xen/ 2020-06-10 12:09:56 -04:00
xtensa Include hw/irq.h a lot less 2019-08-16 13:31:52 +02:00
boards.h hw: add compat machines for 5.2 2020-08-19 10:45:48 -04:00
clock.h hw/core/clock-vmstate: define a vmstate entry for clock state 2020-04-30 15:35:40 +01:00
elf_ops.h hw/elf_ops: Do not ignore write failures when loading ELF 2020-06-10 12:10:23 -04:00
fw-path-provider.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
hotplug.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
hw.h Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
ide.h hw/ide: Move MAX_IDE_DEVS define to hw/ide/internal.h 2020-03-17 12:22:36 -04:00
irq.h include/hw/irq.h: New function qemu_irq_is_connected() 2020-08-03 17:55:03 +01:00
loader-fit.h Use #include "..." for our own headers, <...> for others 2018-02-09 05:05:11 +01:00
loader.h hw/core/loader: Let load_elf() populate a field with CPU-specific flags 2020-01-29 19:28:52 +01:00
nmi.h hw/nmi: Fix the NMI() macro, based on INTERFACE_CHECK() 2020-02-28 14:57:19 -05:00
or-irq.h hw/core/or-irq: Increase limit of or-lines to 48 2020-01-23 16:34:15 +00:00
pcmcia.h Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
platform-bus.h platform-bus-device: use device plug callback instead of machine_done notifier 2018-05-10 18:10:56 +01:00
ptimer.h ptimer: Remove old ptimer_init_with_bh() API 2019-11-11 13:44:16 +00:00
qdev-clock.h qdev-clock: introduce an init array to ease the device construction 2020-04-30 15:35:40 +01:00
qdev-core.h qdev: Document GPIO related functions 2020-07-20 11:35:17 +01:00
qdev-dma.h Supply missing header guards 2019-06-12 13:20:21 +02:00
qdev-properties.h qdev: Document qdev_prop_set_drive_err() return value 2020-08-19 10:44:29 -04:00
register.h hw/core/register: Add register_init_block8 helper. 2020-05-05 13:37:51 -07:00
registerfields.h hw/registerfields: Prefix local variables with underscore in macros 2020-05-27 11:23:07 -07:00
resettable.h hw/core: deprecate old reset functions and introduce new ones 2020-01-30 16:02:04 +00:00
stream.h hw/core: stream: Add an end-of-packet flag 2020-05-14 13:44:35 +02:00
sysbus.h sysbus: sysbus_init_child_obj() is now unused, drop 2020-06-15 22:06:04 +02:00
usb.h usb: usb_create() is now unused, drop 2020-06-15 22:05:28 +02:00
vmstate-if.h vmstate: add qom interface to get id 2020-01-06 18:41:32 +04:00