From owner-dev-commits-src-all@freebsd.org Mon Mar 15 02:39:55 2021 Return-Path: Delivered-To: dev-commits-src-all@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 C670656ADD9; Mon, 15 Mar 2021 02:39:55 +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 4DzLHG6mFDz3M6L; Mon, 15 Mar 2021 02:39:54 +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 AED56A14; Mon, 15 Mar 2021 02:39:51 +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 12F2dpX1061692; Mon, 15 Mar 2021 02:39:51 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 12F2dpvb061691; Mon, 15 Mar 2021 02:39:51 GMT (envelope-from git) Date: Mon, 15 Mar 2021 02:39:51 GMT Message-Id: <202103150239.12F2dpvb061691@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Alexander Motin Subject: git: 6b409a8b32e0 - stable/13 - Optimize TX coalescing by keeping pointer to last mbuf. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mav X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 6b409a8b32e056e2a5d7b886ce4210bba81a019a Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Mar 2021 02:39:56 -0000 The branch stable/13 has been updated by mav: URL: https://cgit.FreeBSD.org/src/commit/?id=6b409a8b32e056e2a5d7b886ce4210bba81a019a commit 6b409a8b32e056e2a5d7b886ce4210bba81a019a Author: Alexander Motin AuthorDate: 2021-03-02 04:31:34 +0000 Commit: Alexander Motin CommitDate: 2021-03-15 02:35:37 +0000 Optimize TX coalescing by keeping pointer to last mbuf. Before m_cat() each time traversed through all the coalesced chain. MFC after: 1 week (cherry picked from commit b85a67f54a40053e75658a17c620b89bafaba67f) --- sys/dev/iscsi/icl_soft.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/sys/dev/iscsi/icl_soft.c b/sys/dev/iscsi/icl_soft.c index a5696647169a..c66d8ccdb5fd 100644 --- a/sys/dev/iscsi/icl_soft.c +++ b/sys/dev/iscsi/icl_soft.c @@ -849,6 +849,7 @@ static void icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue) { struct icl_pdu *request, *request2; + struct mbuf *m; struct socket *so; long available, size, size2; int coalesced, error; @@ -908,8 +909,8 @@ icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue) return; } if (coalesce) { - coalesced = 1; - for (;;) { + m = request->ip_bhs_mbuf; + for (coalesced = 1; ; coalesced++) { request2 = STAILQ_FIRST(queue); if (request2 == NULL) break; @@ -926,13 +927,14 @@ icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue) icl_conn_fail(ic); return; } - m_cat(request->ip_bhs_mbuf, request2->ip_bhs_mbuf); + while (m->m_next) + m = m->m_next; + m_cat(m, request2->ip_bhs_mbuf); request2->ip_bhs_mbuf = NULL; request->ip_bhs_mbuf->m_pkthdr.len += size2; size += size2; STAILQ_REMOVE_AFTER(queue, request, ip_next); icl_soft_pdu_done(request2, 0); - coalesced++; } #if 0 if (coalesced > 1) {