On 11/02/2018 07:26 PM, Michael S. Tsirkin wrote: > On Fri, Nov 02, 2018 at 06:21:22PM +0000, Vitaly Mayatskikh wrote: >> vhost_blk is a host-side kernel mode accelerator for virtio-blk. The >> driver allows VM to reach a near bare-metal disk performance. See IOPS >> numbers below (fio --rw=randread --bs=4k). >> >> This implementation uses kiocb interface. It is slightly slower than >> going directly through bio, but is simpler and also works with disk >> images placed on a file system. This should also work with other transports like virtio-ccw (instead of virtio-pci). Correct? >> >> # fio num-jobs >> # A: bare metal over block >> # B: bare metal over file >> # C: virtio-blk over block >> # D: virtio-blk over file >> # E: vhost-blk bio over block >> # F: vhost-blk kiocb over block >> # G: vhost-blk kiocb over file >> # >> # A B C D E F G >> >> 1 171k 151k 148k 151k 195k 187k 175k >> 2 328k 302k 249k 241k 349k 334k 296k >> 3 479k 437k 179k 174k 501k 464k 404k >> 4 622k 568k 143k 183k 620k 580k 492k >> 5 755k 697k 136k 128k 737k 693k 579k >> 6 887k 808k 131k 120k 830k 782k 640k >> 7 1004k 926k 126k 131k 926k 863k 693k >> 8 1099k 1015k 117k 115k 1001k 931k 712k >> 9 1194k 1119k 115k 111k 1055k 991k 711k >> 10 1278k 1207k 109k 114k 1130k 1046k 695k >> 11 1345k 1280k 110k 108k 1119k 1091k 663k >> 12 1411k 1356k 104k 106k 1201k 1142k 629k >> 13 1466k 1423k 106k 106k 1260k 1170k 607k >> 14 1517k 1486k 103k 106k 1296k 1179k 589k >> 15 1552k 1543k 102k 102k 1322k 1191k 571k >> 16 1480k 1506k 101k 102k 1346k 1202k 566k >> >> Vitaly Mayatskikh (1): >> Add vhost_blk driver > > > Thanks! > Before merging this, I'd like to get some acks from userspace that it's > actually going to be used - e.g. QEMU block maintainers. > >> drivers/vhost/Kconfig | 13 ++ >> drivers/vhost/Makefile | 3 + >> drivers/vhost/blk.c | 510 +++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 526 insertions(+) >> create mode 100644 drivers/vhost/blk.c >> >> -- >> 2.17.1 > _______________________________________________ > Virtualization mailing list > Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linuxfoundation.org/mailman/listinfo/virtualization >
