Re: [dpdk-dev] [PATCH] net/vmxnet3: increase rx data ring descriptor size

[Yong Wang <yongwang@vmware.com>]

> -----Original Message-----
> From: Shraddha Joshi [mailto:jshraddha@vmware.com]
> Sent: Thursday, April 19, 2018 11:19 AM
> To: Yong Wang <yongwang@vmware.com>
> Cc: dev@dpdk.org; Shraddha Joshi <jshraddha@vmware.com>
> Subject: [PATCH] net/vmxnet3: increase rx data ring descriptor size
> 
> Vmxnet3 driver supports receive data ring viz. a set of small sized
> buffers that are always mapped by the emulation. If a packet fits into
> the receive data ring buffer, the emulation delivers the packet via the
> receive data ring.
> 
> Increasing the receive data ring descriptor size from 128 to 256
> showed performance gains as high as 5% for packets smaller than 256.
> 
> Signed-off-by: Shraddha Joshi <jshraddha@vmware.com>
> Acked-by: Jin Heo <heoj@vmware.com>
> Acked-by: Guolin Yang <gyang@vmware.com>
> Acked-by: Boon Ang <bang@vmware.com>

Acked-by: Yong Wang <yongwang@vmware.com>

> ---
>  drivers/net/vmxnet3/vmxnet3_ring.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/vmxnet3/vmxnet3_ring.h
> b/drivers/net/vmxnet3/vmxnet3_ring.h
> index 552180e84..50992349d 100644
> --- a/drivers/net/vmxnet3/vmxnet3_ring.h
> +++ b/drivers/net/vmxnet3/vmxnet3_ring.h
> @@ -14,7 +14,7 @@
>  #define VMXNET3_DEF_RX_RING_SIZE 128
> 
>  /* Default rx data ring desc size */
> -#define VMXNET3_DEF_RXDATA_DESC_SIZE 128
> +#define VMXNET3_DEF_RXDATA_DESC_SIZE 256
> 
>  #define VMXNET3_SUCCESS 0
>  #define VMXNET3_FAIL   -1
> --
> 2.11.0