Date: Thu, 19 Nov 2015 15:14:40 -0800 From: hiren panchasara <hiren@strugglingcoder.info> To: Randall Stewart <rrs@netflix.com> Cc: FreeBSD Transports <transport@FreeBSD.org>, freebsd-net@FreeBSD.org Subject: dupack counter processing Message-ID: <20151119231440.GE98283@strugglingcoder.info> In-Reply-To: <20151018003740.GE87252@strugglingcoder.info> References: <DA8A5844-8F11-42D5-B923-3F329203B867@netflix.com> <20151018003740.GE87252@strugglingcoder.info>
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--8TaQrIeukR7mmbKf Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable + freebsd-net as this deserves more eyeballs, imo. On 10/17/15 at 05:37P, hiren panchasara wrote: > On 10/07/15 at 12:17P, Randall Stewart via freebsd-transport wrote: > >=20 > > 2) When we recognize a dup-ack we *will not* recognize it if for exampl= e if the rwnd changes even > > if new SACK information is reported in the sack blocks. This is due= to the fact that in non-SACK you don?t > > (on purpose) recognize ACK?s where the window changed (since you ca= n?t really tell if its a > > plain window update or a dup-ack).. This means we occasionally mis= s out > > on stroking the dup-ack counter and getting out of recovery.... After a lot of discussion with Randall and colleagues at Limelight, here is the patch for review: https://reviews.freebsd.org/D4225 This changes the default behavior of how we detect loss. I'd appreciate review/comments. Cheers, Hiren --8TaQrIeukR7mmbKf Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAABCgBmBQJWTlfcXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRBNEUyMEZBMUQ4Nzg4RjNGMTdFNjZGMDI4 QjkyNTBFMTU2M0VERkU1AAoJEIuSUOFWPt/l7tgIAKfxmxuhg/qh1TFQsb2fVk8m UYTHkQkeFmr7hGkyDVt4196D9yPzp8Xvdk7L5d5N3jKyErEBzBPlh9rHWVHsijA2 7v1H4KmNf9w8gYVTVSh727DcdWODJtJJEPDCn1bygaRV0UmaVxMjrbOUcub1fU+e EegM/n0eQlbDN2FD/GjLJu8HFw6M25Grwf2r56XO4/l7NvUqZGFxKYaa+mvcIZWe 7XJPsRtIpgKZJ2ZQ51BDzgpUSCl76bEJ9MjipJ6CbsF+Av5HBC7Bm5gu7TZKlCn6 EPWjPr+4AS8BDVTa6Ju92yD5q4SOQmRBjWB0dnr8a8w1vLhSGD1AEz4IJUmoCD8= =WsbP -----END PGP SIGNATURE----- --8TaQrIeukR7mmbKf--
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