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. > > # 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
