From owner-svn-src-all@freebsd.org Mon Feb 3 23:30:39 2020 Return-Path: Delivered-To: svn-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 DD114232FAF; Mon, 3 Feb 2020 23:30:39 +0000 (UTC) (envelope-from np@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48BPFq5bgRz4JZQ; Mon, 3 Feb 2020 23:30:39 +0000 (UTC) (envelope-from np@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id BB9968727; Mon, 3 Feb 2020 23:30:39 +0000 (UTC) (envelope-from np@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 013NUdBd017523; Mon, 3 Feb 2020 23:30:39 GMT (envelope-from np@FreeBSD.org) Received: (from np@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 013NUdT5017522; Mon, 3 Feb 2020 23:30:39 GMT (envelope-from np@FreeBSD.org) Message-Id: <202002032330.013NUdT5017522@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: np set sender to np@FreeBSD.org using -f From: Navdeep Parhar Date: Mon, 3 Feb 2020 23:30:39 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r357476 - head/sys/dev/cxgbe X-SVN-Group: head X-SVN-Commit-Author: np X-SVN-Commit-Paths: head/sys/dev/cxgbe X-SVN-Commit-Revision: 357476 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Feb 2020 23:30:39 -0000 Author: np Date: Mon Feb 3 23:30:39 2020 New Revision: 357476 URL: https://svnweb.freebsd.org/changeset/base/357476 Log: cxgbe(4): Do not use pack boundary > 512B unless it is explicitly requested. This is a tradeoff between PCIe efficiency during large packet rx and packing efficiency during small packet rx. MFC after: 1 week Sponsored by: Chelsio Communications Modified: head/sys/dev/cxgbe/t4_sge.c Modified: head/sys/dev/cxgbe/t4_sge.c ============================================================================== --- head/sys/dev/cxgbe/t4_sge.c Mon Feb 3 23:25:12 2020 (r357475) +++ head/sys/dev/cxgbe/t4_sge.c Mon Feb 3 23:30:39 2020 (r357476) @@ -589,6 +589,9 @@ t4_sge_extfree_refs(void) return (refs - rels); } +/* max 4096 */ +#define MAX_PACK_BOUNDARY 512 + static inline void setup_pad_and_pack_boundaries(struct adapter *sc) { @@ -635,7 +638,10 @@ setup_pad_and_pack_boundaries(struct adapter *sc) pack = fl_pack; if (fl_pack < 16 || fl_pack == 32 || fl_pack > 4096 || !powerof2(fl_pack)) { - pack = max(sc->params.pci.mps, CACHE_LINE_SIZE); + if (sc->params.pci.mps > MAX_PACK_BOUNDARY) + pack = MAX_PACK_BOUNDARY; + else + pack = max(sc->params.pci.mps, CACHE_LINE_SIZE); MPASS(powerof2(pack)); if (pack < 16) pack = 16;