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GET /api/patches/140129/?format=api
{ "id": 140129, "url": "http://patchwork.dpdk.org/api/patches/140129/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/20240515234234.5015-2-stephen@networkplumber.org/", "project": { "id": 1, "url": "http://patchwork.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": "<20240515234234.5015-2-stephen@networkplumber.org>", "list_archive_url": "https://inbox.dpdk.org/dev/20240515234234.5015-2-stephen@networkplumber.org", "date": "2024-05-15T23:40:53", "name": "[v4,1/8] eal: generic 64 bit counter", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "ecb7b117e95e624dd0669547a8f1650a80175326", "submitter": { "id": 27, "url": "http://patchwork.dpdk.org/api/people/27/?format=api", "name": "Stephen Hemminger", "email": "stephen@networkplumber.org" }, "delegate": { "id": 1, "url": "http://patchwork.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patchwork.dpdk.org/project/dpdk/patch/20240515234234.5015-2-stephen@networkplumber.org/mbox/", "series": [ { "id": 31935, "url": "http://patchwork.dpdk.org/api/series/31935/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/list/?series=31935", "date": "2024-05-15T23:40:52", "name": "Generic 64 bit counters for SW PMD's", "version": 4, "mbox": "http://patchwork.dpdk.org/series/31935/mbox/" } ], "comments": "http://patchwork.dpdk.org/api/patches/140129/comments/", "check": "success", "checks": "http://patchwork.dpdk.org/api/patches/140129/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 03C914403F;\n\tThu, 16 May 2024 01:42:53 +0200 (CEST)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 6F29F402F2;\n\tThu, 16 May 2024 01:42:48 +0200 (CEST)", "from mail-pf1-f174.google.com (mail-pf1-f174.google.com\n [209.85.210.174])\n by mails.dpdk.org (Postfix) with ESMTP id F0A4C402E1\n for <dev@dpdk.org>; Thu, 16 May 2024 01:42:45 +0200 (CEST)", "by mail-pf1-f174.google.com with SMTP id\n d2e1a72fcca58-6f467fb2e66so6681657b3a.1\n for <dev@dpdk.org>; Wed, 15 May 2024 16:42:45 -0700 (PDT)", "from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226])\n by smtp.gmail.com with ESMTPSA id\n d2e1a72fcca58-6f67b0cd494sm958479b3a.161.2024.05.15.16.42.44\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Wed, 15 May 2024 16:42:44 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1715816565;\n x=1716421365; darn=dpdk.org;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:from:to:cc:subject:date\n :message-id:reply-to;\n bh=3/mQJ/gJ76xp3pkyhb95yzNS3j0G5rXIsxM40qM+R8s=;\n b=aGC6ZEF55XWyQN0NYZwOchhJ5DU4HyxyHqhwAgjRBiE4bREQUYaOroRMOpLGciy4qU\n Fr6YlCRnGSB1BT1jdJmwb/5SUweW/0X94K1V3gzAl/Nd/GtOm55fy+Hj0CCVR+w8rFW+\n OMdduoF4v7OXjaVOd8Xg7MfmPDLyBNE/qJ2xAv9/IfPc9ogl0d1x0nkjv4jgTnwGK81F\n Wce2E1c4If/M0zFBEQZeS3Tr0jo6ceIoaTp+GX5HsHnQbKWdaBHw5xoiblSnNUnaZ7dP\n O5RA+n3Qn9ZQmUneskQ/cxOvdKX0avRTrg+jTXnCZf1FTIjTLMLe4NMRRA2Jbzk1hXgP\n uUYQ==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20230601; t=1715816565; x=1716421365;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc\n :subject:date:message-id:reply-to;\n bh=3/mQJ/gJ76xp3pkyhb95yzNS3j0G5rXIsxM40qM+R8s=;\n b=WRdAovWkufz8YYNi4kLpH9/3NnfB68G97rDDU/LaZUCDFSDBBtbRZp41Ep0EDrq8Vy\n Dz/bvxyOjUOTf6KgTUzanOOgzSe4xx7cLQj0jPMMCM3uY2xrDDiDWXb7Un0qyu6/7NnK\n 9+wfcALjsSEdpZuXGLiiLH3jdxFfNMngPbNJoxGk8m38nZlXt2dmvidL33FUqdQTw9eH\n 7NNkvx4OXH6fCRXzfQKEr2LOIghV54jBeOZFWjcA7JV0EXzzUtHf6Da9yeTUww8ZT+R1\n alHy9U4+3XOpGbOQg94s/ZZgihHqcsXAyDk4jRhGx2ZMI9MXcb/amlC4BXmiDJNhP+ce\n Rd3A==", "X-Gm-Message-State": "AOJu0YzA7swIL/gfDcoFFCRox+WdcxZmUCQr5AOEkVeRfA+PPTqggBl0\n UHF7klqX3a264Eh4XQ54q0IgRa+Z8il+VMn+89Zg/52SFIvhr+uY1og73wPpC3uXQiH2Alzx9Oz\n sYr8=", "X-Google-Smtp-Source": "\n AGHT+IE65TsMl2AkQOM6ypF+YIRV5Yf6l1QPoBmHLHDLg91SccE6/YKfSckY+7TQaRHkl8eL7CqhMg==", "X-Received": "by 2002:a05:6a00:8a14:b0:6f6:802d:db82 with SMTP id\n d2e1a72fcca58-6f6802ddf11mr680825b3a.23.1715816564969;\n Wed, 15 May 2024 16:42:44 -0700 (PDT)", "From": "Stephen Hemminger <stephen@networkplumber.org>", "To": "dev@dpdk.org", "Cc": "Stephen Hemminger <stephen@networkplumber.org>, =?utf-8?q?Morten_Br?=\n\t=?utf-8?q?=C3=B8rup?= <mb@smartsharesystems.com>", "Subject": "[PATCH v4 1/8] eal: generic 64 bit counter", "Date": "Wed, 15 May 2024 16:40:53 -0700", "Message-ID": "<20240515234234.5015-2-stephen@networkplumber.org>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20240515234234.5015-1-stephen@networkplumber.org>", "References": "<20240510050507.14381-1-stephen@networkplumber.org>\n <20240515234234.5015-1-stephen@networkplumber.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "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": "This header implements 64 bit counters that are NOT atomic\nbut are safe against load/store splits on 32 bit platforms.\n\nSigned-off-by: Stephen Hemminger <stephen@networkplumber.org>\nAcked-by: Morten Brørup <mb@smartsharesystems.com>\n---\n lib/eal/include/meson.build | 1 +\n lib/eal/include/rte_counter.h | 91 +++++++++++++++++++++++++++++++++++\n 2 files changed, 92 insertions(+)\n create mode 100644 lib/eal/include/rte_counter.h", "diff": "diff --git a/lib/eal/include/meson.build b/lib/eal/include/meson.build\nindex e94b056d46..c070dd0079 100644\n--- a/lib/eal/include/meson.build\n+++ b/lib/eal/include/meson.build\n@@ -12,6 +12,7 @@ headers += files(\n 'rte_class.h',\n 'rte_common.h',\n 'rte_compat.h',\n+ 'rte_counter.h',\n 'rte_debug.h',\n 'rte_dev.h',\n 'rte_devargs.h',\ndiff --git a/lib/eal/include/rte_counter.h b/lib/eal/include/rte_counter.h\nnew file mode 100644\nindex 0000000000..82e558bd6f\n--- /dev/null\n+++ b/lib/eal/include/rte_counter.h\n@@ -0,0 +1,91 @@\n+/* SPDX-License-Identifier: BSD-3-Clause\n+ * Copyright (c) Stephen Hemminger <stephen@networkplumber.org>\n+ */\n+\n+#ifndef _RTE_COUNTER_H_\n+#define _RTE_COUNTER_H_\n+\n+#ifdef __cplusplus\n+extern \"C\" {\n+#endif\n+\n+/**\n+ * @file\n+ * RTE Counter\n+ *\n+ * A counter is 64 bit value that is safe from split read/write\n+ * on 32 bit platforms. It assumes that only one cpu at a time\n+ * will update the counter, and another CPU may want to read it.\n+ *\n+ * This is a much weaker guarantee than full atomic variables\n+ * but is faster since no locked operations are required for update.\n+ */\n+\n+#include <rte_stdatomic.h>\n+\n+#ifdef RTE_ARCH_64\n+/*\n+ * On a platform that can support native 64 bit type, no special handling.\n+ * These are just wrapper around 64 bit value.\n+ */\n+typedef uint64_t rte_counter64_t;\n+\n+/**\n+ * Add value to counter.\n+ */\n+__rte_experimental\n+static inline void\n+rte_counter64_add(rte_counter64_t *counter, uint32_t val)\n+{\n+\t*counter += val;\n+}\n+\n+__rte_experimental\n+static inline uint64_t\n+rte_counter64_fetch(const rte_counter64_t *counter)\n+{\n+\treturn *counter;\n+}\n+\n+__rte_experimental\n+static inline void\n+rte_counter64_reset(rte_counter64_t *counter)\n+{\n+\t*counter = 0;\n+}\n+\n+#else\n+/*\n+ * On a 32 bit platform need to use atomic to force the compler to not\n+ * split 64 bit read/write.\n+ */\n+typedef RTE_ATOMIC(uint64_t) rte_counter64_t;\n+\n+__rte_experimental\n+static inline void\n+rte_counter64_add(rte_counter64_t *counter, uint32_t val)\n+{\n+\trte_atomic_fetch_add_explicit(counter, val, rte_memory_order_relaxed);\n+}\n+\n+__rte_experimental\n+static inline uint64_t\n+rte_counter64_fetch(const rte_counter64_t *counter)\n+{\n+\treturn rte_atomic_load_explicit(counter, rte_memory_order_relaxed);\n+}\n+\n+__rte_experimental\n+static inline void\n+rte_counter64_reset(rte_counter64_t *counter)\n+{\n+\trte_atomic_store_explicit(counter, 0, rte_memory_order_relaxed);\n+}\n+#endif\n+\n+\n+#ifdef __cplusplus\n+}\n+#endif\n+\n+#endif /* _RTE_COUNTER_H_ */\n", "prefixes": [ "v4", "1/8" ] }