From: "Michael S. Tsirkin" <mst@redhat.com>
To: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Cc: qemu-devel@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Maxim Levitsky <mlevitsk@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 0/1 resend] Add vhost-pci-blk driver
Date: Mon, 5 Nov 2018 12:45:41 -0500 [thread overview]
Message-ID: <20181105124309-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20181105140327.8363-1-v.mayatskih@gmail.com>
On Mon, Nov 05, 2018 at 02:03:26PM +0000, Vitaly Mayatskikh wrote:
> This driver moves virtio-blk host-side processing to kernel (via new
> vhost_blk kernel driver). It accelerates virtual disk performance
> close to bare metal levels, especially for parellel loads.
>
> For example, fio numjobs=16 gets 101k randread IOPS using virtio-blk
> and 1202k IOPS using vhost-blk, close to 1480k of raw disk performance.
>
> See the IOPS numbers below.
>
> The kernel part if you want to try:
> - vhost_blk: https://lkml.org/lkml/2018/11/2/648
> - vhost num-queues scalability fix: https://lkml.org/lkml/2018/11/2/550
>
> # 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 over block
> # F: vhost-blk over file
> #
> # A B C D E F
>
> 1 171k 151k 148k 151k 187k 175k
> 2 328k 302k 249k 241k 334k 296k
> 3 479k 437k 179k 174k 464k 404k
> 4 622k 568k 143k 183k 580k 492k
> 5 755k 697k 136k 128k 693k 579k
> 6 887k 808k 131k 120k 782k 640k
> 7 1004k 926k 126k 131k 863k 693k
> 8 1099k 1015k 117k 115k 931k 712k
> 9 1194k 1119k 115k 111k 991k 711k
> 10 1278k 1207k 109k 114k 1046k 695k
> 11 1345k 1280k 110k 108k 1091k 663k
> 12 1411k 1356k 104k 106k 1142k 629k
> 13 1466k 1423k 106k 106k 1170k 607k
> 14 1517k 1486k 103k 106k 1179k 589k
> 15 1552k 1543k 102k 102k 1191k 571k
> 16 1480k 1506k 101k 102k 1202k 566k
>
> Vitaly Mayatskikh (1):
> Add vhost-pci-blk driver
>
> configure | 10 +++++++
> default-configs/virtio.mak | 1 +
> hw/block/Makefile.objs | 1 +
> hw/virtio/virtio-pci.c | 60 ++++++++++++++++++++++++++++++++++++++
> hw/virtio/virtio-pci.h | 19 ++++++++++++
> 5 files changed, 91 insertions(+)
I think you should Cc more widely to get meaningful
review. At least virtio-blk and block layer core people.
> --
> 2.17.1
next prev parent reply other threads:[~2018-11-05 17:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-05 14:03 [Qemu-devel] [PATCH 0/1 resend] Add vhost-pci-blk driver Vitaly Mayatskikh
2018-11-05 14:03 ` [Qemu-devel] [PATCH 1/1 " Vitaly Mayatskikh
2018-11-05 17:45 ` Michael S. Tsirkin [this message]
2018-11-05 20:08 ` [Qemu-devel] [PATCH 0/1 " Vitaly Mayatskih
2018-11-05 18:23 ` no-reply
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