From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id DCAABA00E6 for ; Thu, 16 May 2019 12:34:05 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 8A79358EC; Thu, 16 May 2019 12:34:04 +0200 (CEST) Received: by dpdk.org (Postfix, from userid 33) id 834B158EC; Thu, 16 May 2019 12:34:02 +0200 (CEST) From: bugzilla@dpdk.org To: dev@dpdk.org Date: Thu, 16 May 2019 10:34:02 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: examples X-Bugzilla-Version: 19.02 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mplaneta@os.inf.tu-dresden.de 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 279] Unaligned memory access when reading ipv6 header 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190516103402.lX0Mwv_Pt3gWpPdKVe24saqrKGEJu-B9s7HQSqkeq3Q@z> https://bugs.dpdk.org/show_bug.cgi?id=3D279 Bug ID: 279 Summary: Unaligned memory access when reading ipv6 header Product: DPDK Version: 19.02 Hardware: x86 OS: Linux Status: CONFIRMED Severity: normal Priority: Normal Component: examples Assignee: dev@dpdk.org Reporter: mplaneta@os.inf.tu-dresden.de Target Milestone: --- Hello, I'm running l3fwd application in a following way: sudo ./build/l3fwd -l 2-3 -n 2 --vdev=3Dnet_tap0 --vdev=3Dnet_tap1=20 --vdev=3Dnet_tap2 -- -p 0xe -E --parse-ptype --config=3D"(1,0,3),(2,0,3= )" And it fails with following output: EAL: Detected 4 lcore(s) EAL: Detected 1 NUMA nodes EAL: Multi-process socket /var/run/dpdk/rte/mp_socket EAL: No free hugepages reported in hugepages-1048576kB EAL: Probing VFIO support... EAL: PCI device 0000:00:1f.6 on NUMA socket -1 EAL: Invalid NUMA socket, default to 0 EAL: probe driver: 8086:15d8 net_e1000_em soft parse-ptype is enabled Skipping disabled port 0 Initializing port 1 ... Creating queues: nb_rxq=3D1 nb_txq=3D2...=20 Address:AE:00:CE:7A:B1:50, Destination:02:00:00:00:00:01, Allocated mbuf po= ol on socket 0 Hash: Adding 0x4 keys txq=3D2,0,0 txq=3D3,1,0=20 Initializing port 2 ... Creating queues: nb_rxq=3D1 nb_txq=3D2...=20 Address:F6:CE:D9:39:29:D2, Destination:02:00:00:00:00:02, txq=3D2,0,0 txq= =3D3,1,0=20 Initializing port 3 ... Creating queues: nb_rxq=3D0 nb_txq=3D2...=20 Address:92:18:9B:13:E1:EF, Destination:02:00:00:00:00:03, txq=3D2,0,0 txq= =3D3,1,0=20 Initializing rx queues on lcore 2 ...=20 Initializing rx queues on lcore 3 ... rxq=3D1,0,0 rxq=3D2,0,0=20 Port 1: softly parse packet type info Port 2: softly parse packet type info Checking link statusdone Port1 Link Up. Speed 10000 Mbps -full-duplex Port2 Link Up. Speed 10000 Mbps -full-duplex Port3 Link Up. Speed 10000 Mbps -full-duplex L3FWD: entering main loop on lcore 3 L3FWD: -- lcoreid=3D3 portid=3D1 rxqueueid=3D0 L3FWD: -- lcoreid=3D3 portid=3D2 rxqueueid=3D0 L3FWD: lcore 2 has nothing to do [1] 13769 segmentation fault sudo ./build/l3fwd -l 2-3 -n 2 --vdev=3Dne= t_tap0 --vdev=3Dnet_tap1 --vdev=3Dnet_tap In the debugger I see that the reason point to unaligned memory access in following instruction: 0x5555555de474 vmovdqa 0x14(%rdi),%xmm2 Where p/x $rdi + 0x14 $3 =3D 0x100694162 The instruction point to following line of function em_get_ipv6_dst_port: key.xmm[1] =3D *(xmm_t *)data1; I compiled DPDK with following command: make -j4 install EXTRA_CFLAGS=3D"-ggdb3 -O0" T=3Dx86_64-native-linuxapp-gcc DESTDIR=3D$(pwd)/../dpdk-install prefix=3D And used the same CFLAGS for l3fwd System information $ lscpu=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20 Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian Address sizes: 39 bits physical, 48 bits virtual CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 2 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 142 Model name: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz Stepping: 9 CPU MHz: 915.480 CPU max MHz: 3100.0000 CPU min MHz: 400.0000 BogoMIPS: 5424.00 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 3072K NUMA node0 CPU(s): 0-3 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge m= ca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti tpr_shadow vnmi flexpriori= ty ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rd= seed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat= pln pts hwp hwp_notify hwp_act_window hwp_epp $ gcc --version gcc (Debian 8.2.0-14) 8.2.0 Copyright (C) 2018 Free Software Foundation, Inc. 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