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Re: [Qemu-devel] [PATCH 07/10] virtio: combine the read of a descriptor
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [PATCH 07/10] virtio: combine the read of a descriptor |
Date: |
Tue, 19 Jan 2016 17:07:28 +0100 |
On Fri, 15 Jan 2016 13:41:55 +0100
Paolo Bonzini <address@hidden> wrote:
> Compared to vring, virtio has a performance penalty of 10%. Fix it
> by combining all the reads for a descriptor in a single address_space_read
> call. This also simplifies the code nicely.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
> hw/virtio/virtio.c | 86
> ++++++++++++++++++++++--------------------------------
> 1 file changed, 35 insertions(+), 51 deletions(-)
Nice :)
Reviewed-by: Cornelia Huck <address@hidden>
- [Qemu-devel] [PATCH 06/10] vring: slim down allocation of VirtQueueElements, (continued)
- [Qemu-devel] [PATCH 06/10] vring: slim down allocation of VirtQueueElements, Paolo Bonzini, 2016/01/15
- [Qemu-devel] [PATCH 04/10] virtio: introduce virtqueue_alloc_element, Paolo Bonzini, 2016/01/15
- [Qemu-devel] [PATCH 08/10] virtio: cache used_idx in a VirtQueue field, Paolo Bonzini, 2016/01/15
- [Qemu-devel] [PATCH 02/10] virtio: move allocation to virtqueue_pop/vring_pop, Paolo Bonzini, 2016/01/15
- [Qemu-devel] [PATCH 07/10] virtio: combine the read of a descriptor, Paolo Bonzini, 2016/01/15
- Re: [Qemu-devel] [PATCH 07/10] virtio: combine the read of a descriptor,
Cornelia Huck <=
- [Qemu-devel] [PATCH 10/10] virtio: combine write of an entry into used ring, Paolo Bonzini, 2016/01/15
- [Qemu-devel] [PATCH 09/10] virtio: read avail_idx from VQ only when necessary, Paolo Bonzini, 2016/01/15