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49f676a00a
this patch adopts the loop unrolling idea of bitmap_is_zero() to speed up the skipping of large areas with zeros in find_next_bit(). this routine is extensively used to find dirty pages in live migration. testing only the find_next_bit performance on a zeroed bitfield the loop onrolling decreased executing time by approx. 50% on x86_64. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Juan Quintela <quintela@redhat.com> |
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.. | ||
acl.c | ||
aes.c | ||
bitmap.c | ||
bitops.c | ||
cache-utils.c | ||
compatfd.c | ||
cutils.c | ||
envlist.c | ||
error.c | ||
event_notifier-posix.c | ||
event_notifier-win32.c | ||
fifo8.c | ||
hbitmap.c | ||
hexdump.c | ||
host-utils.c | ||
iov.c | ||
Makefile.objs | ||
module.c | ||
notify.c | ||
osdep.c | ||
oslib-posix.c | ||
oslib-win32.c | ||
path.c | ||
qemu-config.c | ||
qemu-error.c | ||
qemu-option.c | ||
qemu-progress.c | ||
qemu-sockets.c | ||
qemu-thread-posix.c | ||
qemu-thread-win32.c | ||
qemu-timer-common.c | ||
uri.c |