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GET /api/patches/133935/?format=api
http://patches.dpdk.org/api/patches/133935/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20231107121845.2758454-3-yoan.picchi@arm.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20231107121845.2758454-3-yoan.picchi@arm.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20231107121845.2758454-3-yoan.picchi@arm.com", "date": "2023-11-07T12:18:43", "name": "[v3,2/4] hash: optimize compare signature for NEON", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "a1814904fc82fa9dff6270570b177b2f74dc44f2", "submitter": { "id": 3196, "url": "http://patches.dpdk.org/api/people/3196/?format=api", "name": "Yoan Picchi", "email": "yoan.picchi@arm.com" }, "delegate": { "id": 1, "url": "http://patches.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20231107121845.2758454-3-yoan.picchi@arm.com/mbox/", "series": [ { "id": 30183, "url": "http://patches.dpdk.org/api/series/30183/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=30183", "date": "2023-11-07T12:18:41", "name": "hash: add SVE support for bulk key lookup", "version": 3, "mbox": "http://patches.dpdk.org/series/30183/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/133935/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/133935/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from mails.dpdk.org (mails.dpdk.org [217.70.189.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 503BD432C7;\n\tTue, 7 Nov 2023 14:05:03 +0100 (CET)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id E74E540ED8;\n\tTue, 7 Nov 2023 14:04:58 +0100 (CET)", "from foss.arm.com (foss.arm.com [217.140.110.172])\n by mails.dpdk.org (Postfix) with ESMTP id 7654140A7F\n for <dev@dpdk.org>; Tue, 7 Nov 2023 13:19:00 +0100 (CET)", "from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14])\n by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A15581477;\n Tue, 7 Nov 2023 04:19:44 -0800 (PST)", "from ampere-altra-2-2.usa.Arm.com (unknown [10.118.91.160])\n by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E44313F6C4;\n Tue, 7 Nov 2023 04:18:59 -0800 (PST)" ], "From": "Yoan Picchi <yoan.picchi@arm.com>", "To": "Thomas Monjalon <thomas@monjalon.net>,\n Yipeng Wang <yipeng1.wang@intel.com>,\n Sameh Gobriel <sameh.gobriel@intel.com>,\n Bruce Richardson <bruce.richardson@intel.com>,\n Vladimir Medvedkin <vladimir.medvedkin@intel.com>", "Cc": "Nathan Brown <nathan.brown@arm.com>, Ruifeng Wang <ruifeng.wang@arm.com>,\n dev@dpdk.org, Yoan Picchi <yoan.picchi@arm.com>", "Subject": "[PATCH v3 2/4] hash: optimize compare signature for NEON", "Date": "Tue, 7 Nov 2023 12:18:43 +0000", "Message-Id": "<20231107121845.2758454-3-yoan.picchi@arm.com>", "X-Mailer": "git-send-email 2.25.1", "In-Reply-To": "<20231107121845.2758454-1-yoan.picchi@arm.com>", "References": "<20231107121845.2758454-1-yoan.picchi@arm.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Approved-At": "Tue, 07 Nov 2023 14:04:56 +0100", "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>,\n <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>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org" }, "content": "Upon a successful comparison, NEON sets all the bits in the lane to 1\nWe can skip shifting by simply masking with specific masks.\n\nSigned-off-by: Yoan Picchi <yoan.picchi@arm.com>\nReviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>\nReviewed-by: Nathan Brown <nathan.brown@arm.com>\n---\n lib/hash/rte_cuckoo_hash.c | 16 +++++++---------\n 1 file changed, 7 insertions(+), 9 deletions(-)", "diff": "diff --git a/lib/hash/rte_cuckoo_hash.c b/lib/hash/rte_cuckoo_hash.c\nindex 2aa96eb862..a4b907c45c 100644\n--- a/lib/hash/rte_cuckoo_hash.c\n+++ b/lib/hash/rte_cuckoo_hash.c\n@@ -1864,19 +1864,17 @@ compare_signatures_dense(uint32_t *prim_hash_matches, uint32_t *sec_hash_matches\n \t/* For match mask every bits indicates the match */\n \tswitch (sig_cmp_fn) {\n \tcase RTE_HASH_COMPARE_NEON: {\n-\t\tuint16x8_t vmat, vsig, x;\n-\t\tint16x8_t shift = {0, 1, 2, 3, 4, 5, 6, 7};\n+\t\tuint16x8_t vmat, x;\n+\t\tconst uint16x8_t mask = {0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80};\n+\t\tconst uint16x8_t vsig = vld1q_dup_u16((uint16_t const *)&sig);\n \n-\t\tvsig = vld1q_dup_u16((uint16_t const *)&sig);\n \t\t/* Compare all signatures in the primary bucket */\n-\t\tvmat = vceqq_u16(vsig,\n-\t\t\tvld1q_u16((uint16_t const *)prim_bkt->sig_current));\n-\t\tx = vshlq_u16(vandq_u16(vmat, vdupq_n_u16(0x0001)), shift);\n+\t\tvmat = vceqq_u16(vsig, vld1q_u16((uint16_t const *)prim_bkt->sig_current));\n+\t\tx = vandq_u16(vmat, mask);\n \t\t*prim_hash_matches = (uint32_t)(vaddvq_u16(x));\n \t\t/* Compare all signatures in the secondary bucket */\n-\t\tvmat = vceqq_u16(vsig,\n-\t\t\tvld1q_u16((uint16_t const *)sec_bkt->sig_current));\n-\t\tx = vshlq_u16(vandq_u16(vmat, vdupq_n_u16(0x0001)), shift);\n+\t\tvmat = vceqq_u16(vsig, vld1q_u16((uint16_t const *)sec_bkt->sig_current));\n+\t\tx = vandq_u16(vmat, mask);\n \t\t*sec_hash_matches = (uint32_t)(vaddvq_u16(x));\n \t\t}\n \t\tbreak;\n", "prefixes": [ "v3", "2/4" ] }{ "id": 133935, "url": "