linux-kernel - Re: [PATCH bpf-next 1/3] xsk: Support UMEM chunk_size > PAGE

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Date:   Tue, 21 Mar 2023 12:34:03 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Cc:     Kal Conley <kal.conley@...tris.com>,
        Björn Töpel <bjorn@...nel.org>,
        Magnus Karlsson <magnus.karlsson@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <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>,
        <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next 1/3] xsk: Support UMEM chunk_size > PAGE_SIZE

On Tue, 21 Mar 2023 11:48:27 +0100 Maciej Fijalkowski wrote:
> tell mlx4 does not support xdp multi-buffer, so you were testing this

FWIW

ConnectX-3 [PRO] == mlx4
ConnectX-4       == mlx5

But agreed that more info would help. You'd need to have some TLB
pressure to see benefit of huge pages.