From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by dpdk.org (Postfix, from userid 33) id 11ABF4CA7; Tue, 9 Apr 2019 19:03:48 +0200 (CEST) From: bugzilla@dpdk.org To: dev@dpdk.org Date: Tue, 09 Apr 2019 17:03:48 +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: 18.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ferruh.yigit@intel.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 249] kni cause a kernel crash on avx512 supported platform with gcc 8.3.1 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: Tue, 09 Apr 2019 17:03:48 -0000 https://bugs.dpdk.org/show_bug.cgi?id=3D249 Bug ID: 249 Summary: kni cause a kernel crash on avx512 supported platform with gcc 8.3.1 Product: DPDK Version: 18.11 Hardware: All OS: All Status: CONFIRMED Severity: normal Priority: Normal Component: core Assignee: dev@dpdk.org Reporter: ferruh.yigit@intel.com Target Milestone: --- The reason of the crash looks like kni library is filling the rx_q with wro= ng values. This only happens on SkyLake platform when avx512 is enabled, disabling the avx512 via "-mno-avx512f" prevents the crash, also using clang (7.0.1) prev= ents the issue although it generates avx512 code. For reference, binutils version: 2.31.1-24.fc29 At first glance suspected instruction is 'vpgatherqq' but it needs to be debugged more. Also will submit a defect to gcc. --=20 You are receiving this mail because: You are the assignee for the bug.= 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 2ACC8A0096 for ; Tue, 9 Apr 2019 19:03:52 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id AC4E74CA7; Tue, 9 Apr 2019 19:03:49 +0200 (CEST) Received: by dpdk.org (Postfix, from userid 33) id 11ABF4CA7; Tue, 9 Apr 2019 19:03:48 +0200 (CEST) From: bugzilla@dpdk.org To: dev@dpdk.org Date: Tue, 09 Apr 2019 17:03:48 +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: 18.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ferruh.yigit@intel.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 249] kni cause a kernel crash on avx512 supported platform with gcc 8.3.1 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: <20190409170348.ITmC_Y3-6UoiacbRB8v8bpq9-KDaPChHbLmHjNWn3Z4@z> https://bugs.dpdk.org/show_bug.cgi?id=3D249 Bug ID: 249 Summary: kni cause a kernel crash on avx512 supported platform with gcc 8.3.1 Product: DPDK Version: 18.11 Hardware: All OS: All Status: CONFIRMED Severity: normal Priority: Normal Component: core Assignee: dev@dpdk.org Reporter: ferruh.yigit@intel.com Target Milestone: --- The reason of the crash looks like kni library is filling the rx_q with wro= ng values. This only happens on SkyLake platform when avx512 is enabled, disabling the avx512 via "-mno-avx512f" prevents the crash, also using clang (7.0.1) prev= ents the issue although it generates avx512 code. For reference, binutils version: 2.31.1-24.fc29 At first glance suspected instruction is 'vpgatherqq' but it needs to be debugged more. Also will submit a defect to gcc. --=20 You are receiving this mail because: You are the assignee for the bug.=