lkml.org 
[lkml]   [2019]   [Apr]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH RFC 4/4] vsock/virtio: increase RX buffer size to 64 KiB
On Thu, Apr 04, 2019 at 12:58:38PM +0200, Stefano Garzarella wrote:
> In order to increase host -> guest throughput with large packets,
> we can use 64 KiB RX buffers.
>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
> include/linux/virtio_vsock.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
> index 6d7a22cc20bf..43cce304408e 100644
> --- a/include/linux/virtio_vsock.h
> +++ b/include/linux/virtio_vsock.h
> @@ -10,7 +10,7 @@
> #define VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE 128
> #define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
> #define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
> -#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
> +#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 64)

This patch raises rx ring memory consumption from 128 * 4KB = 512KB to
128 * 64KB = 8MB.

Michael, Jason: Any advice regarding rx/tx ring sizes and buffer sizes?

Depending on rx ring size and the workload's packet size, different
values might be preferred.

This could become a tunable in the future. It determines the size of
the guest driver's rx buffers.
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2019-04-05 10:47    [W:0.211 / U:1.656 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site