[Qemu-devel] [PATCH v3 0/1] ARM64: Live migration optimization

[vijayak]

From: Vijaya Kumar K <address@hidden>

To optimize Live migration time on ARM64 machine,
Neon instructions are used for Zero page checking.

With these changes, total migration time comes down
from 3.5 seconds to 2.9 seconds.

These patches are tested on top of (GICv3 live migration support)
https://lists.gnu.org/archive/html/qemu-devel/2015-10/msg05284.html
However there is no direct dependency on these patches.

v2 -> v3 changes:
  - Dropped Thunderx specific patches(2) from this series. Will
    be added on kernel exposing midr register to userspace.
  - Used generic zero page checking function. Only macros
    are updated.

v1 -> v2 changes:
----------------
  - Dropped 'target-arm: Update page size for aarch64' patch.
  - Each loop in zero buffer check function is reduced to
    16 from 32.
  - Replaced vorrq_u64 with '|' in Neon macros
  - Renamed local variable to reflect 128 bit.
  - Introduced new file cpuinfo.c to parse /proc/cpuinfo
  - Added Thunderx specific patches to add prefetch in
    zero buffer check function.

Vijay (1):
  target-arm: Use Neon for zero checking

 util/cutils.c |    7 +++++++
 1 file changed, 7 insertions(+)

-- 
1.7.9.5