[v1,0/4] Increase default virtqueue size to improve performance

Message

Denis Plotnikov Jan. 29, 2020, 2:06 p.m. UTC

The goal is to increase the performance of the block layer on
1M reads/writes up to 4% by reducing the amount of requests issued by a guest
using virtio-scsi or virtio-blk devices.

Original problem description:
https://lists.gnu.org/archive/html/qemu-devel/2017-12/msg03721.html


Denis Plotnikov (4):
  virtio: introduce VIRTQUEUE_DEFUALT_SIZE instead of hardcoded
    constants
  virtio: increase virtuqueue size for virtio-scsi and virtio-blk
  tests: add virtuqueue size checking to virtio_seg_max_adjust test
  tests: rename virtio_seg_max_adjust to virtio_check_params

 hw/block/virtio-blk.c                         |  6 ++--
 hw/core/machine.c                             |  3 ++
 hw/scsi/virtio-scsi.c                         |  5 +--
 include/hw/virtio/virtio.h                    |  1 +
 ...g_max_adjust.py => virtio_check_params.py} | 33 ++++++++++++-------
 5 files changed, 32 insertions(+), 16 deletions(-)
 rename tests/acceptance/{virtio_seg_max_adjust.py => virtio_check_params.py} (79%)