From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id F37844617B; Mon, 3 Feb 2025 05:33:29 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 957A240DD3; Mon, 3 Feb 2025 05:33:29 +0100 (CET) Received: from inbox.dpdk.org (inbox.dpdk.org [95.142.172.178]) by mails.dpdk.org (Postfix) with ESMTP id A909540287 for <dev@dpdk.org>; Mon, 3 Feb 2025 05:33:27 +0100 (CET) Received: by inbox.dpdk.org (Postfix, from userid 33) id A24274617C; Mon, 3 Feb 2025 05:33:27 +0100 (CET) From: bugzilla@dpdk.org To: dev@dpdk.org Subject: [DPDK/other Bug 1656] AVX-512 support disabled Date: Mon, 03 Feb 2025 04:33:27 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: other X-Bugzilla-Version: 18.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nandinipersad361@gmail.com X-Bugzilla-Status: UNCONFIRMED 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: <bug-1656-3@http.bugs.dpdk.org/> Content-Type: multipart/alternative; boundary=17385572070.9497f7.2170417 Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org --17385572070.9497f7.2170417 Date: Mon, 3 Feb 2025 05:33:27 +0100 MIME-Version: 1.0 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 https://bugs.dpdk.org/show_bug.cgi?id=3D1656 Bug ID: 1656 Summary: AVX-512 support disabled Product: DPDK Version: 18.11 Hardware: All OS: Other Status: UNCONFIRMED Severity: normal Priority: Normal Component: other Assignee: dev@dpdk.org Reporter: nandinipersad361@gmail.com Target Milestone: --- AVX-512 support has been disabled on some conditions. On DPDK v18.11 AVX-512 is disabled for all GCC builds which reported to cau= se a performance drop. On DPDK v19.02 AVX-512 disable scope is reduced to GCC and binutils version 2.30 based on information accrued from the GCC community defect. Reason: Generated AVX-512 code cause crash: https://bugs.dpdk.org/show_bug.cgi?id= =3D97 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88096 Resolution/Workaround: Update binutils to newer version than 2.30. OR Use different compiler, like clang for this case. Affected Environment/Platform: GCC and binutils version 2.30. Driver/Module: ALL. --=20 You are receiving this mail because: You are the assignee for the bug.= --17385572070.9497f7.2170417 Date: Mon, 3 Feb 2025 05:33:27 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All <html> <head> <base href=3D"https://bugs.dpdk.org/"> </head> <body><table border=3D"1" cellspacing=3D"0" cellpadding=3D"8" class=3D"= bz_new_table"> <tr> <th>Bug ID</th> <td><a class=3D"bz_bug_link=20 bz_status_UNCONFIRMED " title=3D"UNCONFIRMED - AVX-512 support disabled" href=3D"https://bugs.dpdk.org/show_bug.cgi?id=3D1656">1656</a> </td> </tr> <tr> <th>Summary</th> <td>AVX-512 support disabled </td> </tr> <tr> <th>Product</th> <td>DPDK </td> </tr> <tr> <th>Version</th> <td>18.11 </td> </tr> <tr> <th>Hardware</th> <td>All </td> </tr> <tr> <th>OS</th> <td>Other </td> </tr> <tr> <th>Status</th> <td>UNCONFIRMED </td> </tr> <tr> <th>Severity</th> <td>normal </td> </tr> <tr> <th>Priority</th> <td>Normal </td> </tr> <tr> <th>Component</th> <td>other </td> </tr> <tr> <th>Assignee</th> <td>dev@dpdk.org </td> </tr> <tr> <th>Reporter</th> <td>nandinipersad361@gmail.com </td> </tr> <tr> <th>Target Milestone</th> <td>--- </td> </tr></table> <p> <div class=3D"bz_comment_block"> <pre class=3D"bz_comment_text">AVX-512 support has been disabled = on some conditions. On DPDK v18.11 AVX-512 is disabled for all GCC builds which reported to cau= se a performance drop. On DPDK v19.02 AVX-512 disable scope is reduced to GCC and binutils version 2.30 based on information accrued from the GCC community defect. Reason: Generated AVX-512 code cause crash: <a class=3D"bz_bug_link bz_st= atus_RESOLVED bz_closed" title=3D"RESOLVED FIXED - rte_memcpy() moves da= ta incorrectly on Ubuntu 18.04 on Intel Skylake" href=3D"show_bug.cgi?id= =3D97">https://bugs.dpdk.org/show_bug.cgi?id=3D97</a> <a href=3D"https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88096">https://gc= c.gnu.org/bugzilla/show_bug.cgi?id=3D88096</a> Resolution/Workaround: Update binutils to newer version than 2.30. OR Use different compiler, like clang for this case. Affected Environment/Platform: GCC and binutils version 2.30. Driver/Module: ALL. </pre> </div> </p> <hr> <span>You are receiving this mail because:</span> <ul> <li>You are the assignee for the bug.</li> </ul> <div itemscope itemtype=3D"http://schema.org/EmailMessage"> <div itemprop=3D"action" itemscope itemtype=3D"http://schema.org/Vi= ewAction"> =20=20=20=20=20=20=20=20=20=20 <link itemprop=3D"url" href=3D"https://bugs.dpdk.org/show_bug.cgi= ?id=3D1656"> <meta itemprop=3D"name" content=3D"View bug"> </div> <meta itemprop=3D"description" content=3D"Bugzilla bug update notif= ication"> </div> </body> </html>= --17385572070.9497f7.2170417--