From owner-dev-commits-src-branches@freebsd.org Mon Mar 8 11:26:41 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2B0CE56F343; Mon, 8 Mar 2021 11:26:41 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DvGJK0n73z4WVw; Mon, 8 Mar 2021 11:26:41 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 0D9F2390; Mon, 8 Mar 2021 11:26:41 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 128BQepE056748; Mon, 8 Mar 2021 11:26:40 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 128BQeqI056747; Mon, 8 Mar 2021 11:26:40 GMT (envelope-from git) Date: Mon, 8 Mar 2021 11:26:40 GMT Message-Id: <202103081126.128BQeqI056747@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Richard Scheffenegger Subject: git: 71cc98ba7352 - stable/13 - tcp: Add prr_out in preparation for PRR/nonSACK and LRD MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: rscheff X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 71cc98ba735283b8720c9031eb87810f3d3d96a0 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Mar 2021 11:26:41 -0000 The branch stable/13 has been updated by rscheff: URL: https://cgit.FreeBSD.org/src/commit/?id=71cc98ba735283b8720c9031eb87810f3d3d96a0 commit 71cc98ba735283b8720c9031eb87810f3d3d96a0 Author: Richard Scheffenegger AuthorDate: 2021-03-05 23:36:48 +0000 Commit: Richard Scheffenegger CommitDate: 2021-03-08 11:23:58 +0000 tcp: Add prr_out in preparation for PRR/nonSACK and LRD Reviewed By: #transport, kbowling MFC after: 3 days Sponsored By: Netapp, Inc. Differential Revision: https://reviews.freebsd.org/D29058 (cherry picked from commit e53138694aa41c24c17847afe959225ce0eeff91) --- sys/netinet/tcp_input.c | 21 ++++++++------------- sys/netinet/tcp_output.c | 8 ++++++++ sys/netinet/tcp_var.h | 2 +- 3 files changed, 17 insertions(+), 14 deletions(-) diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 4773c8fb3dac..e000c589c78e 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -510,6 +510,7 @@ cc_post_recovery(struct tcpcb *tp, struct tcphdr *th) } /* XXXLAS: EXIT_RECOVERY ? */ tp->t_bytes_acked = 0; + tp->sackhint.prr_out = 0; } /* @@ -2601,17 +2602,14 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, imax(1, tp->snd_nxt - tp->snd_una); snd_cnt = howmany((long)tp->sackhint.prr_delivered * tp->snd_ssthresh, tp->sackhint.recover_fs) - - (tp->sackhint.sack_bytes_rexmit + - (tp->snd_nxt - tp->snd_recover)); + tp->sackhint.prr_out; } else { if (V_tcp_do_prr_conservative) limit = tp->sackhint.prr_delivered - - (tp->sackhint.sack_bytes_rexmit + - (tp->snd_nxt - tp->snd_recover)); + tp->sackhint.prr_out; else limit = imax(tp->sackhint.prr_delivered - - (tp->sackhint.sack_bytes_rexmit + - (tp->snd_nxt - tp->snd_recover)), + tp->sackhint.prr_out, del_data) + maxseg; snd_cnt = imin(tp->snd_ssthresh - pipe, limit); } @@ -3978,18 +3976,15 @@ tcp_prr_partialack(struct tcpcb *tp, struct tcphdr *th) imax(1, tp->snd_nxt - tp->snd_una); snd_cnt = howmany((long)tp->sackhint.prr_delivered * tp->snd_ssthresh, tp->sackhint.recover_fs) - - (tp->sackhint.sack_bytes_rexmit + - (tp->snd_nxt - tp->snd_recover)); + tp->sackhint.prr_out; } else { if (V_tcp_do_prr_conservative) limit = tp->sackhint.prr_delivered - - (tp->sackhint.sack_bytes_rexmit + - (tp->snd_nxt - tp->snd_recover)); + tp->sackhint.prr_out; else limit = imax(tp->sackhint.prr_delivered - - (tp->sackhint.sack_bytes_rexmit + - (tp->snd_nxt - tp->snd_recover)), - del_data) + maxseg; + tp->sackhint.prr_out, del_data) + + maxseg; snd_cnt = imin((tp->snd_ssthresh - pipe), limit); } snd_cnt = imax(snd_cnt, 0) / maxseg; diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c index b4c7ab0a1ab7..d4b5a328e2a6 100644 --- a/sys/netinet/tcp_output.c +++ b/sys/netinet/tcp_output.c @@ -1236,6 +1236,14 @@ send: p->rxmit += len; tp->sackhint.sack_bytes_rexmit += len; } + if (IN_RECOVERY(tp->t_flags)) { + /* + * Account all bytes transmitted while + * IN_RECOVERY, simplifying PRR and + * Lost Retransmit Detection + */ + tp->sackhint.prr_out += len; + } th->th_ack = htonl(tp->rcv_nxt); if (optlen) { bcopy(opt, th + 1, optlen); diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index 6e22d75ac441..3b007fcfcc93 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -115,7 +115,7 @@ struct sackhint { */ uint32_t recover_fs; /* Flight Size at the start of Loss recovery */ uint32_t prr_delivered; /* Total bytes delivered using PRR */ - uint32_t _pad[1]; /* TBD */ + uint32_t prr_out; /* Bytes sent during IN_RECOVERY */ }; #define SEGQ_EMPTY(tp) TAILQ_EMPTY(&(tp)->t_segq)