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GET /api/1.1/patches/2230104/?format=api
{ "id": 2230104, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230104/?format=api", "web_url": "http://patchwork.ozlabs.org/project/glibc/patch/20260429082030.310472-2-xiejiamei@hygon.cn/", "project": { "id": 41, "url": "http://patchwork.ozlabs.org/api/1.1/projects/41/?format=api", "name": "GNU C Library", "link_name": "glibc", "list_id": "libc-alpha.sourceware.org", "list_email": "libc-alpha@sourceware.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260429082030.310472-2-xiejiamei@hygon.cn>", "date": "2026-04-29T08:20:30", "name": "[v1,1/1] x86: Enable Prefer_No_AVX512 for Hygon model 0x8", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9543220bd5577c6ad5c98ff72154a5b717f98cad", "submitter": { "id": 91872, "url": "http://patchwork.ozlabs.org/api/1.1/people/91872/?format=api", "name": "Jiamei Xie", "email": "xiejiamei@hygon.cn" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/glibc/patch/20260429082030.310472-2-xiejiamei@hygon.cn/mbox/", "series": [ { "id": 502016, "url": "http://patchwork.ozlabs.org/api/1.1/series/502016/?format=api", "web_url": "http://patchwork.ozlabs.org/project/glibc/list/?series=502016", "date": "2026-04-29T08:20:30", "name": "[v1,1/1] x86: Enable Prefer_No_AVX512 for Hygon model 0x8", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502016/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230104/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230104/checks/", "tags": {}, "headers": { "Return-Path": "<libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "libc-alpha@sourceware.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "libc-alpha@sourceware.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)", "sourceware.org;\n dmarc=fail (p=none dis=none) header.from=hygon.cn", "sourceware.org; spf=fail smtp.mailfrom=hygon.cn", "server2.sourceware.org;\n arc=none smtp.remote-ip=101.204.27.37" ], "Received": [ "from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g59JQ5pSDz1xqf\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 18:21:53 +1000 (AEST)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id B9C7B4B99F54\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 08:21:51 +0000 (GMT)", "from mailgw1.hygon.cn (unknown [101.204.27.37])\n by sourceware.org (Postfix) with ESMTP id E1D404BA79A3\n for <libc-alpha@sourceware.org>; Wed, 29 Apr 2026 08:21:05 +0000 (GMT)", "from maildlp1.hygon.cn (unknown [127.0.0.1])\n by mailgw1.hygon.cn (Postfix) with ESMTP id 4g59HN2nDFzvFmh\n for <libc-alpha@sourceware.org>; Wed, 29 Apr 2026 16:21:04 +0800 (CST)", "from maildlp1.hygon.cn (unknown [172.23.18.60])\n by mailgw1.hygon.cn (Postfix) with ESMTP id 4g59HL71QTzvFmh\n for <libc-alpha@sourceware.org>; Wed, 29 Apr 2026 16:21:02 +0800 (CST)", "from cncheex04.Hygon.cn (unknown [172.23.18.114])\n by maildlp1.hygon.cn (Postfix) with ESMTPS id 151341547\n for <libc-alpha@sourceware.org>; Wed, 29 Apr 2026 16:20:56 +0800 (CST)", "from Mei.hygon.cn (172.19.22.176) by cncheex04.Hygon.cn\n (172.23.18.114) with Microsoft SMTP Server (version=TLS1_2,\n cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.36; Wed, 29 Apr\n 2026 16:20:47 +0800" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org B9C7B4B99F54", "OpenDKIM Filter v2.11.0 sourceware.org E1D404BA79A3" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org E1D404BA79A3", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org E1D404BA79A3", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1777450866; cv=none;\n b=aIopPGoD84yr8ZEmEYl0m6dZUOPD58a2Zl2yj7ZqBoCc3iDq9BOJTgFToM9EfbVa8gk3frnRV2mMzwtuaIswt9Ht5XSLqWbgj2iAFEg2J6+Ks9lY7WpYWHm5wMiSuMeS4izcUqM0qxEZUe7NVdOBOeXqRlMaSpud9A8aJv0n6go=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1777450866; c=relaxed/simple;\n bh=jge1RyABRYeKFSJHwAsC7mn7I9aevBe78cwPVk1re1Q=;\n h=From:To:Subject:Date:Message-ID:MIME-Version;\n b=eqJIesZyBkyNNDvqRw30t6M38WO7uVJbWjiFhu5MDAO8vCQmWQso3TvQ5vxXPHhBjNw3roXIqz05ESVEWTI/qbrdG7Pdm1CkHXCIj4Si6HEpWjLwruC7mf+6dDBnT937hIT0TDBKcJcPeLqcMm5GMENznk9n2b4yeL5sItl8RNI=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "From": "Jiamei Xie <xiejiamei@hygon.cn>", "To": "<libc-alpha@sourceware.org>", "CC": "<xiejiamei@hygon.cn>, <lijing@hygon.cn>", "Subject": "[PATCH v1 1/1] x86: Enable Prefer_No_AVX512 for Hygon model 0x8", "Date": "Wed, 29 Apr 2026 08:20:30 +0000", "Message-ID": "<20260429082030.310472-2-xiejiamei@hygon.cn>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260429082030.310472-1-xiejiamei@hygon.cn>", "References": "<20260429082030.310472-1-xiejiamei@hygon.cn>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-Originating-IP": "[172.19.22.176]", "X-ClientProxiedBy": "cncheex05.Hygon.cn (172.23.18.115) To cncheex04.Hygon.cn\n (172.23.18.114)", "X-BeenThere": "libc-alpha@sourceware.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Libc-alpha mailing list <libc-alpha.sourceware.org>", "List-Unsubscribe": "<https://sourceware.org/mailman/options/libc-alpha>,\n <mailto:libc-alpha-request@sourceware.org?subject=unsubscribe>", "List-Archive": "<https://sourceware.org/pipermail/libc-alpha/>", "List-Post": "<mailto:libc-alpha@sourceware.org>", "List-Help": "<mailto:libc-alpha-request@sourceware.org?subject=help>", "List-Subscribe": "<https://sourceware.org/mailman/listinfo/libc-alpha>,\n <mailto:libc-alpha-request@sourceware.org?subject=subscribe>", "Errors-To": "libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org" }, "content": "From: xiejiamei <xiejiamei@hygon.cn>\n\nExtend the Prefer_No_AVX512 tuning to cover Hygon model 0x8.\n\nBenchmarks on Hygon platforms show that EVEX implementations\nare often more profitable than AVX512 paths. The existing logic\nalready enables Prefer_No_AVX512 for model 0x7. Apply the same\npreference to model 0x8 to ensure consistent IFUNC selection\nbehavior across newer Hygon processors.\n\nSigned-off-by: xiejiamei <xiejiamei@hygon.cn>\n---\n sysdeps/x86/cpu-features.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c\nindex 73ee4f2bb8..a453136827 100644\n--- a/sysdeps/x86/cpu-features.c\n+++ b/sysdeps/x86/cpu-features.c\n@@ -1135,7 +1135,7 @@ disable_tsx:\n \t cpu_features->preferred[index_arch_AVX_Fast_Unaligned_Load]\n \t &= ~bit_arch_AVX_Fast_Unaligned_Load;\n \t}\n- else if (model == 0x7)\n+ else if (model == 0x7 || model == 0x8)\n \t{\n \t /* Benchmarks indicate evex can be more profitable on Hygon\n \t hardware than AVX512. */\n", "prefixes": [ "v1", "1/1" ] }