Vijay 7069532e3b target-arm: Use Neon for zero checking ...

Use Neon instructions to perform zero checking of
buffer. This is helps in reducing total migration time.

Use case: Idle VM live migration with 4 VCPUS and 8GB ram
running CentOS 7.

Without Neon, the Total migration time is 3.5 Sec

Migration status: completed
total time: 3560 milliseconds
downtime: 33 milliseconds
setup: 5 milliseconds
transferred ram: 297907 kbytes
throughput: 685.76 mbps
remaining ram: 0 kbytes
total ram: 8519872 kbytes
duplicate: 2062760 pages
skipped: 0 pages
normal: 69808 pages
normal bytes: 279232 kbytes
dirty sync count: 3

With Neon, the total migration time is 2.9 Sec

Migration status: completed
total time: 2960 milliseconds
downtime: 65 milliseconds
setup: 4 milliseconds
transferred ram: 299869 kbytes
throughput: 830.19 mbps
remaining ram: 0 kbytes
total ram: 8519872 kbytes
duplicate: 2064313 pages
skipped: 0 pages
normal: 70294 pages
normal bytes: 281176 kbytes
dirty sync count: 3

Signed-off-by: Vijaya Kumar K <vijayak@cavium.com>
Signed-off-by: Suresh <ksuresh@cavium.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1467190029-694-2-git-send-email-vijayak@cavium.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2016-07-14 16:51:36 +01:00

..

acl.c

Drop Emacs local variables lists redundant with .dir-locals.el

2016-07-12 16:19:16 +02:00

base64.c

…

bitmap.c

…

bitops.c

…

buffer.c

qemu-common: stop including qemu/host-utils.h from qemu-common.h

2016-05-19 16:42:28 +02:00

compatfd.c

…

coroutine-gthread.c

all: Remove unnecessary glib.h includes

2016-06-07 18:19:24 +03:00

coroutine-sigaltstack.c

…

coroutine-ucontext.c

…

coroutine-win32.c

…

crc32c.c

…

cutils.c

target-arm: Use Neon for zero checking

2016-07-14 16:51:36 +01:00

envlist.c

…

error.c

migration: add reporting of errors for outgoing migration

2016-05-26 11:31:30 +05:30

event_notifier-posix.c

…

event_notifier-win32.c

…

fifo8.c

…

getauxval.c

…

hbitmap.c

hbitmap: add 'pos < size' asserts

2016-06-16 15:20:37 +02:00

hexdump.c

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host-utils.c

…

id.c

…

iov.c

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log.c

log: Permit -dfilter 0..0xffffffffffffffff

2016-07-04 16:49:33 +03:00

Makefile.objs

range: Create range.c for code that should not be inline

2016-06-30 15:28:40 +02:00

memfd.c

os-posix: include sys/mman.h

2016-06-16 18:39:03 +02:00

mmap-alloc.c

Use #include "..." for our own headers, <...> for others

2016-07-12 16:19:16 +02:00

module.c

coccinelle: Remove unnecessary variables for function return value

2016-06-20 16:38:13 +02:00

notify.c

…

osdep.c

osdep: Introduce qemu_dup

2016-07-13 13:26:02 +02:00

oslib-posix.c

Use #include "..." for our own headers, <...> for others

2016-07-12 16:19:16 +02:00

oslib-win32.c

all: Remove unnecessary glib.h includes

2016-06-07 18:19:24 +03:00

path.c

…

qdist.c

clean-includes: run it once more

2016-06-16 18:39:03 +02:00

qemu-config.c

…

qemu-coroutine-io.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

qemu-coroutine-lock.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

qemu-coroutine-sleep.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

qemu-coroutine.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

qemu-error.c

…

qemu-openpty.c

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qemu-option.c

…

qemu-progress.c

…

qemu-sockets.c

qemu-sockets: use qapi_free_SocketAddress in cleanup

2016-07-12 18:31:27 +02:00

qemu-thread-posix.c

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qemu-thread-win32.c

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qemu-timer-common.c

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qht.c

clean-includes: run it once more

2016-06-16 18:39:03 +02:00

range.c

range: Replace internal representation of Range

2016-07-04 16:49:33 +03:00

rcu.c

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readline.c

…

rfifolock.c

rfifolock: no need to get thread identifier when nesting

2016-05-16 15:29:44 -07:00

throttle.c

throttle: refuse iops-size without iops-total/read/write

2016-06-07 14:40:51 +01:00

timed-average.c

Fix some typos found by codespell

2016-05-18 15:04:27 +03:00

trace-events

trace: split out trace events for util/ directory

2016-06-20 17:22:14 +01:00

unicode.c

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uri.c

all: Remove unnecessary glib.h includes

2016-06-07 18:19:24 +03:00