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Open Source and information security mailing list archives
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Date: Sun, 11 Dec 2022 09:04:56 -0800 From: Stephen Hemminger <stephen@...workplumber.org> To: Eric Dumazet <edumazet@...gle.com> Cc: Jakub Sitnicki <jakub@...udflare.com>, Neal Cardwell <ncardwell@...gle.com>, Weiping Zhang <zhangweiping@...iglobal.com>, davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org, kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org, zwp10758@...il.com Subject: Re: [RFC PATCH] tcp: correct srtt and mdev_us calculation On Sat, 10 Dec 2022 18:45:56 +0100 Eric Dumazet <edumazet@...gle.com> wrote: > On Tue, Dec 6, 2022 at 10:29 AM Jakub Sitnicki <jakub@...udflare.com> wrote: > > > > Nifty. And it's documented. > > > > struct tcp_sock { > > … > > u32 srtt_us; /* smoothed round trip time << 3 in usecs */ > > > > Thanks for the hint. > > The >> 3 is all over the place... So even without a formal comment, > anyone familiar with TCP stack would spot this... And it should be in every text book already and is in BSD as well. Maybe a link to the SIGCOMM paper would be good for those google deprived people?
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