diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-22 13:51:30 +0200 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2015-11-06 15:42:38 +0300 |
| commit | 68851b98e5bf6d397498b74f1776801274ab8d48 (patch) | |
| tree | d773342247525f12874ae07ef39844bf2dd24558 /aio-posix.c | |
| parent | 74de807f794ac5201b2b3c38ddadeef84a676a97 (diff) | |
exec: avoid unnecessary cacheline bounce on ram_list.mru_block
Whenever the MRU cache hits for the list of RAM blocks, qemu_get_ram_block
does an unnecessary write that causes a processor cache line to bounce
from one core to another. This causes a performance hit.
Reported-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Diffstat (limited to 'aio-posix.c')
0 files changed, 0 insertions, 0 deletions