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  1. 24 2月, 2017 3 次提交
  3. 14 9月, 2016 1 次提交
  5. 14 7月, 2016 1 次提交
    • V
      target-arm: Use Neon for zero checking · 7069532e
      由 Vijay 提交于 
      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: NVijaya Kumar K <vijayak@cavium.com>
Signed-off-by: NSuresh <ksuresh@cavium.com>
Acked-by: NPaolo Bonzini <pbonzini@redhat.com>
Message-id: 1467190029-694-2-git-send-email-vijayak@cavium.com
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
      7069532e
  7. 17 6月, 2016 1 次提交
  9. 23 3月, 2016 1 次提交
  11. 08 3月, 2016 1 次提交
    • L
      cutils: add avx2 instruction optimization · 28b90d9c
      由 Liang Li 提交于 
      buffer_find_nonzero_offset() is a hot function during live migration.
Now it use SSE2 instructions for optimization. For platform supports
AVX2 instructions, use AVX2 instructions for optimization can help
to improve the performance of buffer_find_nonzero_offset() about 30%
comparing to SSE2.

Live migration can be faster with this optimization, the test result
shows that for an 8GiB RAM idle guest just boots, this patch can help
to shorten the total live migration time about 6%.

This patch use the ifunc mechanism to select the proper function when
running, for platform supports AVX2, execute the AVX2 instructions,
else, execute the original instructions.
Signed-off-by: NLiang Li <liang.z.li@intel.com>
Suggested-by: NPaolo Bonzini <pbonzini@redhat.com>
Suggested-by: NRichard Henderson <rth@twiddle.net>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <1457416397-26671-3-git-send-email-liang.z.li@intel.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>
      28b90d9c
  13. 05 2月, 2016 1 次提交
    • P
      util: Clean up includes · aafd7584
      由 Peter Maydell 提交于 
      Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.

This commit was created with scripts/clean-includes.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 1454089805-5470-6-git-send-email-peter.maydell@linaro.org
      aafd7584
  15. 25 9月, 2015 1 次提交
  17. 10 9月, 2015 1 次提交
  19. 09 9月, 2015 4 次提交
  21. 07 9月, 2015 2 次提交
  23. 26 6月, 2015 1 次提交
  25. 10 3月, 2015 1 次提交
  27. 03 3月, 2015 1 次提交
  29. 09 5月, 2014 1 次提交
  31. 27 3月, 2014 1 次提交
  33. 06 6月, 2013 2 次提交
  35. 24 4月, 2013 1 次提交
  37. 26 3月, 2013 2 次提交
  39. 05 2月, 2013 1 次提交
    • E
      cutils: unsigned int parsing functions · e3f9fe2d
      由 Eduardo Habkost 提交于 
      There are lots of duplicate parsing code using strto*() in QEMU, and
most of that code is broken in one way or another. Even the visitors
code have duplicate integer parsing code[1]. This introduces functions
to help parsing unsigned int values: parse_uint() and parse_uint_full().

Parsing functions for signed ints and floats will be submitted later.

parse_uint_full() has all the checks made by opts_type_uint64() at
opts-visitor.c:

 - Check for NULL (returns -EINVAL)
 - Check for negative numbers (returns -EINVAL)
 - Check for empty string (returns -EINVAL)
 - Check for overflow or other errno values set by strtoll() (returns
   -errno)
 - Check for end of string (reject invalid characters after number)
   (returns -EINVAL)

parse_uint() does everything above except checking for the end of the
string, so callers can continue parsing the remainder of string after
the number.

Unit tests included.

[1] string-input-visitor.c:parse_int() could use the same parsing code
    used by opts-visitor.c:opts_type_int(), instead of duplicating that
    logic.
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
      e3f9fe2d
  41. 13 1月, 2013 1 次提交
  43. 02 1月, 2013 1 次提交
  45. 19 12月, 2012 1 次提交
  47. 30 10月, 2012 2 次提交
  49. 05 10月, 2012 1 次提交
  51. 15 8月, 2012 1 次提交
  53. 08 8月, 2012 2 次提交
  55. 26 7月, 2012 1 次提交
  57. 12 6月, 2012 2 次提交
    • M
      rewrite iov_send_recv() and move it to iov.c · 25e5e4c7
      由 Michael Tokarev 提交于 
      Make it much more understandable, add a missing
iov_cnt argument (number of iovs in the iov), and
add comments to it.

The new implementation has been extensively tested
by splitting a large buffer into many small
randomly-sized chunks, sending it over socket to
another, slow process and verifying the receiving
data is the same.

Also add a unit test for iov_send_recv(), sending/
receiving data between two processes over a socketpair
using random vectors and random sizes.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
      25e5e4c7
    • M
      export iov_send_recv() and use it in iov_send() and iov_recv() · e3e87df4
      由 Michael Tokarev 提交于 
      Rename do_sendv_recvv() to iov_send_recv(), change its last arg
(do_send) from int to bool, export it in iov.h, and made the two
callers of it (iov_send() and iov_recv()) to be trivial #defines
just adding 5th arg.

iov_send_recv() will be used later.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
      e3e87df4