linux-kernel - Re: [RFC Optimizing veth xsk performance 04/10] xsk: add xsk_tx_completed

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Date:   Fri, 4 Aug 2023 22:46:24 +0200
From:   Simon Horman <horms@...nel.org>
To:     "huangjie.albert" <huangjie.albert@...edance.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Björn Töpel <bjorn@...nel.org>,
        Magnus Karlsson <magnus.karlsson@...el.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Pavel Begunkov <asml.silence@...il.com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Menglong Dong <imagedong@...cent.com>,
        Richard Gobert <richardbgobert@...il.com>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:XDP (eXpress Data Path)" <bpf@...r.kernel.org>
Subject: Re: [RFC Optimizing veth xsk performance 04/10] xsk: add
 xsk_tx_completed_addr function

On Thu, Aug 03, 2023 at 10:04:30PM +0800, huangjie.albert wrote:

...

> index 13354a1e4280..a494d1dcb1c3 100644
> --- a/net/xdp/xsk_queue.h
> +++ b/net/xdp/xsk_queue.h
> @@ -428,6 +428,17 @@ static inline void __xskq_prod_submit(struct xsk_queue *q, u32 idx)
>  	smp_store_release(&q->ring->producer, idx); /* B, matches C */
>  }
>  
> +

nit: one blank line is enough

> +static inline void xskq_prod_submit_addr(struct xsk_queue *q, u64 addr)
> +{
> +	struct xdp_umem_ring *ring = (struct xdp_umem_ring *)q->ring;
> +	u32 idx = q->ring->producer;
> +
> +	ring->desc[idx++ & q->ring_mask] = addr;
> +
> +	__xskq_prod_submit(q, idx);
> +}
> +
>  static inline void xskq_prod_submit(struct xsk_queue *q)
>  {
>  	__xskq_prod_submit(q, q->cached_prod);
> -- 
> 2.20.1
> 
>