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GET /api/patches/140140/?format=api
{ "id": 140140, "url": "http://patchwork.dpdk.org/api/patches/140140/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/20240516154327.64104-2-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": "<20240516154327.64104-2-stephen@networkplumber.org>", "list_archive_url": "https://inbox.dpdk.org/dev/20240516154327.64104-2-stephen@networkplumber.org", "date": "2024-05-16T15:40:37", "name": "[v5,1/9] eal: generic 64 bit counter", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "4151c63840fc35e44085186cebf4428cc2c9217f", "submitter": { "id": 27, "url": "http://patchwork.dpdk.org/api/people/27/?format=api",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/20240516154327.64104-2-stephen@networkplumber.org/mbox/", "series": [ { "id": 31939, "url": "http://patchwork.dpdk.org/api/series/31939/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/list/?series=31939", "date": "2024-05-16T15:40:36", "name": "Generic 64 bit counters", "version": 5, "mbox": "http://patchwork.dpdk.org/series/31939/mbox/" } ], "comments": "http://patchwork.dpdk.org/api/patches/140140/comments/", "check": "success", "checks": "http://patchwork.dpdk.org/api/patches/140140/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 5EA8F43F81;\n\tThu, 16 May 2024 17:43:46 +0200 (CEST)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 59D2B40648;\n\tThu, 16 May 2024 17:43:41 +0200 (CEST)", "from mail-pf1-f171.google.com (mail-pf1-f171.google.com\n [209.85.210.171])\n by mails.dpdk.org (Postfix) with ESMTP id 4CE644029B\n for <dev@dpdk.org>; Thu, 16 May 2024 17:43:39 +0200 (CEST)", "by mail-pf1-f171.google.com with SMTP id\n d2e1a72fcca58-6f4302187c0so276841b3a.1\n for <dev@dpdk.org>; Thu, 16 May 2024 08:43:39 -0700 (PDT)", "from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226])\n by smtp.gmail.com with ESMTPSA id\n d2e1a72fcca58-6f67b526b44sm2457430b3a.149.2024.05.16.08.43.37\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Thu, 16 May 2024 08:43:37 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1715874218;\n x=1716479018; 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=it8vQ7zCnyKycuWg3oTjgKRI/75M1tfp8aWkSfvtLSE=;\n b=e4NCYv9m1ZYc/Fc6023a4HyX6Hv090gMh2Gj0+KPI7wbiVnIJJT3gr0L0hwPaAqaRI\n 5Ik0Bu6Yd8SK6kQL2UF9IT7Zm8P2+R6amSAdeBo9faayL3fXNJMPO25dWFZwMGZf/eKj\n aPGW7l+DX07PHMpyo67N3JxM3G0muuv5r2UwVNOi2ZlCqIwOikRyBr6lmPCtogUmUYsd\n 0KY0+Em6wB5slEqH6Kt6xOid913clrUBzPnySntzrshn1go3YmTl+5d9P1+2b+NnuGPP\n gNJo3hUAgv21dv6MgIupYfhX0fPDjy7OffAS0kXH9gFjbE5NRagP9WBoMkVvWyFgZYvq\n Xslg==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20230601; t=1715874218; x=1716479018;\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=it8vQ7zCnyKycuWg3oTjgKRI/75M1tfp8aWkSfvtLSE=;\n b=qRwIbrBpqNMbFFMHvv8VeKnJrZXdy15NVkQLqfjaNF9KtNubb6oZr4VSzDGQM5bIq4\n uXK24aRft390TE5PCfipziepuRaR8D1LGje0H41f/4wo81I0ENctEuFO1yXfcxK9gUf/\n GhQmAEz8sL744Y6wQyUikrrKdfftszbbdnT8GUcN8SmSwzTLqPPn7ivzde9/iggx9U93\n qgYhXLsdWfUQ5X9xGeC/K5vMl3WVYGysFbxheY+jM9qoH7S+sKt4WRh8LZDEm6k5AMe/\n n5jnpPSDEccvMD16WJWMR8cindOdBpEdZIgcKOBDyUSMzhopHbhkvBWaYIYrUIzctoOH\n NX7w==", "X-Gm-Message-State": "AOJu0YwHIaEluKp9uVjZeUMUwSQ1EeBKhLNb+VXiZvFOhEef6c6/waYb\n +NwU1JRGHoiWneHRLexfOM39jGLOncUDy/zlxIBEBXoBuQaq43M9oiyZdzaS1LJUNPwSdcpNC2T\n bI9E=", "X-Google-Smtp-Source": "\n AGHT+IG7rVyDzEPCy2qVapPmsbepGzxroyiyqllB2pgKkUHiIEhQPtvXy/9pU0ZHSSNMPEAYCjwY8A==", "X-Received": "by 2002:a05:6a20:728d:b0:1a9:509c:eba6 with SMTP id\n adf61e73a8af0-1afde1c043fmr29486532637.25.1715874218392;\n Thu, 16 May 2024 08:43:38 -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 v5 1/9] eal: generic 64 bit counter", "Date": "Thu, 16 May 2024 08:40:37 -0700", "Message-ID": "<20240516154327.64104-2-stephen@networkplumber.org>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20240516154327.64104-1-stephen@networkplumber.org>", "References": "<20240510050507.14381-1-stephen@networkplumber.org>\n <20240516154327.64104-1-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 | 98 +++++++++++++++++++++++++++++++++++\n 2 files changed, 99 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..d623195d63\n--- /dev/null\n+++ b/lib/eal/include/rte_counter.h\n@@ -0,0 +1,98 @@\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+#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_set(rte_counter64_t *counter, uint64_t val)\n+{\n+\t*counter = val;\n+}\n+\n+#else\n+\n+#include <rte_stdatomic.h>\n+\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_consume);\n+}\n+\n+__rte_experimental\n+static inline void\n+rte_counter64_set(rte_counter64_t *counter, uint64_t val)\n+{\n+\trte_atomic_store_explicit(counter, val, rte_memory_order_release);\n+}\n+#endif\n+\n+__rte_experimental\n+static inline void\n+rte_counter64_reset(rte_counter64_t *counter)\n+{\n+\trte_counter64_set(counter, 0);\n+}\n+\n+#ifdef __cplusplus\n+}\n+#endif\n+\n+#endif /* _RTE_COUNTER_H_ */\n", "prefixes": [ "v5", "1/9" ] }