diff options
author | Rusty Russell <rusty@rustcorp.com.au> | 2013-03-20 15:37:09 +1030 |
---|---|---|
committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-03-20 15:43:29 +1030 |
commit | 13816c768d46586e925b22736992258d6105ad2c (patch) | |
tree | fffb6c71e49b040f532885e6311c5d4886c5d219 /fs/hfsplus/brec.c | |
parent | c8164d8931fdee9ac5314708c4071adf1d997425 (diff) | |
download | op-kernel-dev-13816c768d46586e925b22736992258d6105ad2c.zip op-kernel-dev-13816c768d46586e925b22736992258d6105ad2c.tar.gz |
virtio_ring: virtqueue_add_sgs, to add multiple sgs.
virtio_scsi can really use this, to avoid the current hack of copying
the whole sg array. Some other things get slightly neater, too.
This causes a slowdown in virtqueue_add_buf(), which is implemented as
a wrapper. This is addressed in the next patches.
for i in `seq 50`; do /usr/bin/time -f 'Wall time:%e' ./vringh_test --indirect --eventidx --parallel --fast-vringh; done 2>&1 | stats --trim-outliers:
Before:
Using CPUS 0 and 3
Guest: notified 0, pinged 39009-39063(39062)
Host: notified 39009-39063(39062), pinged 0
Wall time:1.700000-1.950000(1.723542)
After:
Using CPUS 0 and 3
Guest: notified 0, pinged 39062-39063(39063)
Host: notified 39062-39063(39063), pinged 0
Wall time:1.760000-2.220000(1.789167)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Reviewed-by: Asias He <asias@redhat.com>
Diffstat (limited to 'fs/hfsplus/brec.c')
0 files changed, 0 insertions, 0 deletions