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| author | Gerd Hoffmann <kraxel@redhat.com> | 2022-06-30 17:28:40 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2022-07-07 12:05:19 +0200 |
| commit | 46de2eec93bffa0706e6229c0da2919763c8eb04 (patch) | |
| tree | de2bcc92ba54ece25473ca2df83b42b6bd89c5a1 | |
| parent | dc88f9b72df52b22c35b127b80c487e0b6fca4af (diff) | |
| download | qemu-seabios-46de2eec93bffa0706e6229c0da2919763c8eb04.tar.gz | |
virtio-blk: use larger default request size
Bump default from 8 to 64 blocks. Using 8 by default leads
to requests being splitted on qemu, which slows down boot.
Some (temporary) debug logging added showed that almost all
requests on a standard fedora install are less than 64 blocks,
so that should bring us back to 1.15 performance levels.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
| -rw-r--r-- | src/hw/virtio-blk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/hw/virtio-blk.c b/src/hw/virtio-blk.c index 929ba88..9b4a05a 100644 --- a/src/hw/virtio-blk.c +++ b/src/hw/virtio-blk.c @@ -95,7 +95,7 @@ virtio_blk_op(struct disk_op_s *op, int write) blk_num_max = (u16)max_io_size / vdrive->drive.blksize; else /* default blk_num_max if hardware doesnot advise a proper value */ - blk_num_max = 8; + blk_num_max = 64; if (op->count <= blk_num_max) { virtio_blk_op_one_segment(vdrive, write, sg); |