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Date: Wed, 05 Oct 2022 09:33:11 +0200 From: Paolo Abeni <pabeni@...hat.com> To: Eric Dumazet <edumazet@...gle.com> Cc: patchwork-bot+netdevbpf@...nel.org, netdev <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Alexander Duyck <alexanderduyck@...com> Subject: Re: [PATCH net-next v4] net: skb: introduce and use a single page frag cache On Mon, 2022-10-03 at 15:30 -0700, Eric Dumazet wrote: > I was using neper ( https://github.com/google/neper ), with 100 > threads and 4000 flows. > > I suspect contention is hard to see unless you use a host with at > least 128 cores. > Also you need a lot of NIC receive queues (or use RPS to spread > incoming packets to many cores) Nice tool! It looks like it can load the host very easily. I still can't observe the regression on my H/W but I see some minor improvement with the proposed patch, FWIW. I'll try to look for an host with more cores, but that can take a lot to unlimited time. > Cheers, Paolo
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