From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by dpdk.org (Postfix, from userid 33) id 225C91B5F7; Thu, 10 Jan 2019 11:52:59 +0100 (CET) From: bugzilla@dpdk.org To: dev@dpdk.org Date: Thu, 10 Jan 2019 10:52:59 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: core X-Bugzilla-Version: 18.05 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: maxime.coquelin@redhat.com X-Bugzilla-Status: CONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 Subject: [dpdk-dev] [Bug 185] PVP zero-loss performance degradation without --legacy-mem X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Jan 2019 10:52:59 -0000 https://bugs.dpdk.org/show_bug.cgi?id=3D185 Bug ID: 185 Summary: PVP zero-loss performance degradation without --legacy-mem Product: DPDK Version: 18.05 Hardware: All OS: All Status: CONFIRMED Severity: normal Priority: Normal Component: core Assignee: dev@dpdk.org Reporter: maxime.coquelin@redhat.com Target Milestone: --- When doing PVP (Physical to Virtual to Physical) testing, we measure a performance degradation when testpmd in guest is launched without the --legacy-mem parameter. P to V and V to P forwarding is done using OVS-DPDK on host side. Without the --legacy-mem option, we get ~23% of line rate at 10G. With the --legacy-mem option, we get ~29% of line rate at 10G. 1G hugepages are used both in host and guest. Testpmd command line used in guest: testpmd -c 7 -n 4 --socket-mem 2048 0 -w 0000:00:02.0 --legacy-mem -- --bur= st 64 -i --rxq=3D2 --txq=3D2 --rxd=3D4096 --txd=3D1024 --coremask=3D6 --auto-s= tart --port-topology=3Dchained --forward-mode=3Dmacswap testpmd -c 7 -n 4 --socket-mem 2048 0 -w 0000:00:02.0 -- --burst 64 -i --rx= q=3D2 --txq=3D2 --rxd=3D4096 --txd=3D1024 --coremask=3D6 --auto-start --port-topo= logy=3Dchained --forward-mode=3Dmacswap --=20 You are receiving this mail because: You are the assignee for the bug.=