Re: [dpdk-dev] [PATCH v7 2/3] gro: add VXLAN UDP/IPv4 GRO support

["Hu, Jiayu" <jiayu.hu@intel.com>]

Hi Yi,

Just a small issue, and please see it inline. After change it,
you can add my ack in the serial patches.

Thanks,
Jiayu
> -----Original Message-----
> From: yang_y_yi@163.com <yang_y_yi@163.com>
> Sent: Thursday, September 24, 2020 4:58 PM
> To: dev@dpdk.org
> Cc: Hu, Jiayu <jiayu.hu@intel.com>; thomas@monjalon.net;
> yangyi01@inspur.com; yang_y_yi@163.com
> Subject: [PATCH v7 2/3] gro: add VXLAN UDP/IPv4 GRO support
> 
> From: Yi Yang <yangyi01@inspur.com>
> 
> VXLAN UDP/IPv4 GRO can help improve VM-to-VM UDP
> performance when UFO or GSO is enabled in VM, GRO
> must be supported if UFO or GSO is enabled,
> otherwise, performance can't get big improvement
> if only GSO is there.
> 
> With this enabled in DPDK, OVS DPDK can leverage it
> to improve VM-to-VM UDP performance, it will reassemble
> VXLAN UDP/IPv4 fragments immediate after they are
> received from a physical NIC. It is very helpful in
> OVS DPDK VXLAN use case.
> 
> Signed-off-by: Yi Yang <yangyi01@inspur.com>
> diff --git a/lib/librte_gro/rte_gro.c b/lib/librte_gro/rte_gro.c
> index ac23df1..e56bd20 100644
> --- a/lib/librte_gro/rte_gro.c
> +++ b/lib/librte_gro/rte_gro.c
> @@ -11,6 +11,7 @@
>  #include "gro_tcp4.h"
>  #include "gro_udp4.h"
>  #include "gro_vxlan_tcp4.h"
> +#include "gro_vxlan_udp4.h"
> 
>  typedef void *(*gro_tbl_create_fn)(uint16_t socket_id,
>  		uint16_t max_flow_num,
> @@ -20,14 +21,14 @@
> 
>  static gro_tbl_create_fn tbl_create_fn[RTE_GRO_TYPE_MAX_NUM] = {
>  		gro_tcp4_tbl_create, gro_vxlan_tcp4_tbl_create,
> -		gro_udp4_tbl_create, NULL};
> +		gro_udp4_tbl_create, gro_vxlan_udp4_tbl_create, NULL};
>  static gro_tbl_destroy_fn tbl_destroy_fn[RTE_GRO_TYPE_MAX_NUM] = {
>  			gro_tcp4_tbl_destroy, gro_vxlan_tcp4_tbl_destroy,
> -			gro_udp4_tbl_destroy,
> +			gro_udp4_tbl_destroy, gro_vxlan_udp4_tbl_destroy,
>  			NULL};
>  static gro_tbl_pkt_count_fn tbl_pkt_count_fn[RTE_GRO_TYPE_MAX_NUM] =
> {
>  			gro_tcp4_tbl_pkt_count,
> gro_vxlan_tcp4_tbl_pkt_count,
> -			gro_udp4_tbl_pkt_count,
> +			gro_udp4_tbl_pkt_count,
> gro_vxlan_udp4_tbl_pkt_count,
>  			NULL};
> 
>  #define IS_IPV4_TCP_PKT(ptype) (RTE_ETH_IS_IPV4_HDR(ptype) && \
> @@ -47,6 +48,16 @@
>  		     RTE_PTYPE_INNER_L3_IPV4_EXT | \
>  		     RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN)) != 0))
> 
> +#define IS_IPV4_VXLAN_UDP4_PKT(ptype) (RTE_ETH_IS_IPV4_HDR(ptype)
> && \
> +		((ptype & RTE_PTYPE_L4_UDP) == RTE_PTYPE_L4_UDP) && \
> +		((ptype & RTE_PTYPE_TUNNEL_VXLAN) == \
> +		 RTE_PTYPE_TUNNEL_VXLAN) && \
> +		 ((ptype & RTE_PTYPE_INNER_L4_UDP) == \
> +		  RTE_PTYPE_INNER_L4_UDP) && \
> +		  (((ptype & RTE_PTYPE_INNER_L3_MASK) & \
> +		    (RTE_PTYPE_INNER_L3_IPV4 | \
> +		     RTE_PTYPE_INNER_L3_IPV4_EXT | \
> +		     RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN)) != 0))
> 
>  /*
>   * GRO context structure. It keeps the table structures, which are
> @@ -137,19 +148,27 @@ struct gro_ctx {
>  	struct gro_udp4_item udp_items[RTE_GRO_MAX_BURST_ITEM_NUM]
> = {{0} };
> 
>  	/* Allocate a reassembly table for VXLAN TCP GRO */
> -	struct gro_vxlan_tcp4_tbl vxlan_tbl;
> -	struct gro_vxlan_tcp4_flow
> vxlan_flows[RTE_GRO_MAX_BURST_ITEM_NUM];
> -	struct gro_vxlan_tcp4_item
> vxlan_items[RTE_GRO_MAX_BURST_ITEM_NUM]
> +	struct gro_vxlan_tcp4_tbl vxlan_tcp_tbl;
> +	struct gro_vxlan_tcp4_flow
> vxlan_tcp_flows[RTE_GRO_MAX_BURST_ITEM_NUM];
> +	struct gro_vxlan_tcp4_item
> vxlan_tcp_items[RTE_GRO_MAX_BURST_ITEM_NUM]
>  			= {{{0}, 0, 0} };
> 
> +	/* Allocate a reassembly table for VXLAN UDP GRO */
> +	struct gro_vxlan_udp4_tbl vxlan_udp_tbl;
> +	struct gro_vxlan_udp4_flow
> vxlan_udp_flows[RTE_GRO_MAX_BURST_ITEM_NUM];
> +	struct gro_vxlan_udp4_item
> vxlan_udp_items[RTE_GRO_MAX_BURST_ITEM_NUM]
> +			= {{{0}} };

It seems you need add a space after the "}", and this is found by checkpatch.

> +
>  	struct rte_mbuf *unprocess_pkts[nb_pkts];
>  	uint32_t item_num;
>  	int32_t ret;
>  	uint16_t i, unprocess_num = 0, nb_after_gro = nb_pkts;
> -	uint8_t do_tcp4_gro = 0, do_vxlan_gro = 0, do_udp4_gro = 0;
> +	uint8_t do_tcp4_gro = 0, do_vxlan_tcp_gro = 0, do_udp4_gro = 0,
> +		do_vxlan_udp_gro = 0;
> 
>  	if (unlikely((param->gro_types & (RTE_GRO_IPV4_VXLAN_TCP_IPV4 |
>  					RTE_GRO_TCP_IPV4 |
> +					RTE_GRO_IPV4_VXLAN_UDP_IPV4 |
>  					RTE_GRO_UDP_IPV4)) == 0))
>  		return nb_pkts;
> 
> @@ -160,15 +179,28 @@ struct gro_ctx {
> 
>  	if (param->gro_types & RTE_GRO_IPV4_VXLAN_TCP_IPV4) {
>  		for (i = 0; i < item_num; i++)
> -			vxlan_flows[i].start_index = INVALID_ARRAY_INDEX;
> -
> -		vxlan_tbl.flows = vxlan_flows;
> -		vxlan_tbl.items = vxlan_items;
> -		vxlan_tbl.flow_num = 0;
> -		vxlan_tbl.item_num = 0;
> -		vxlan_tbl.max_flow_num = item_num;
> -		vxlan_tbl.max_item_num = item_num;
> -		do_vxlan_gro = 1;
> +			vxlan_tcp_flows[i].start_index =
> INVALID_ARRAY_INDEX;
> +
> +		vxlan_tcp_tbl.flows = vxlan_tcp_flows;
> +		vxlan_tcp_tbl.items = vxlan_tcp_items;
> +		vxlan_tcp_tbl.flow_num = 0;
> +		vxlan_tcp_tbl.item_num = 0;
> +		vxlan_tcp_tbl.max_flow_num = item_num;
> +		vxlan_tcp_tbl.max_item_num = item_num;
> +		do_vxlan_tcp_gro = 1;
> +	}
> +