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GET /api/patches/140067/?format=api
{ "id": 140067, "url": "http://patchwork.dpdk.org/api/patches/140067/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/20240514153845.42489-2-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": "<20240514153845.42489-2-stephen@networkplumber.org>", "list_archive_url": "https://inbox.dpdk.org/dev/20240514153845.42489-2-stephen@networkplumber.org", "date": "2024-05-14T15:35:04", "name": "[v3,1/7] eal: generic 64 bit counter", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "cbf1da4d9f9c681b2725ade686e1dccda99d9e97", "submitter": { "id": 27, "url": "http://patchwork.dpdk.org/api/people/27/?format=api",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/20240514153845.42489-2-stephen@networkplumber.org/mbox/", "series": [ { "id": 31926, "url": "http://patchwork.dpdk.org/api/series/31926/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/list/?series=31926", "date": "2024-05-14T15:35:03", "name": "Generic SW counters", "version": 3, "mbox": "http://patchwork.dpdk.org/series/31926/mbox/" } ], "comments": "http://patchwork.dpdk.org/api/patches/140067/comments/", "check": "success", "checks": "http://patchwork.dpdk.org/api/patches/140067/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 097BE4401F;\n\tTue, 14 May 2024 17:39:03 +0200 (CEST)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id B24624067E;\n\tTue, 14 May 2024 17:38:58 +0200 (CEST)", "from mail-pl1-f176.google.com (mail-pl1-f176.google.com\n [209.85.214.176])\n by mails.dpdk.org (Postfix) with ESMTP id 36FA240156\n for <dev@dpdk.org>; Tue, 14 May 2024 17:38:57 +0200 (CEST)", "by mail-pl1-f176.google.com with SMTP id\n d9443c01a7336-1ec41d82b8bso54310655ad.2\n for <dev@dpdk.org>; Tue, 14 May 2024 08:38:57 -0700 (PDT)", "from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226])\n by smtp.gmail.com with ESMTPSA id\n d9443c01a7336-1ef0c137f14sm99256415ad.259.2024.05.14.08.38.55\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Tue, 14 May 2024 08:38:56 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1715701136;\n x=1716305936; 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=yudQh+9cAzAvlmI5mUHDk5m+pZwFbqBbRBe/82Qf28c=;\n b=Pv8nZhpByRcVU6PD6rGWZWkqgT2Wtm6f4FKp3vGdbGzJD/E6d3cWPE4443HlTHJW92\n LxIYqzGmtWWY0U39QXYOTFvv3/+1lhheDbqkc15cj/e48GbI1LoeT+ivIvI1LX5OwNfM\n YZhyK9ewahlm8c3zl5ygdxrs52QBS32M0AGXHHQr2hAZOIEC2VJNonjoxJ8lsnxa9yfs\n NDk4AU5iLkAlLqAfVu0Y6WEMvkmfvH+m9ZrXjO8uNv+tqCAES41yu2HUriFuW166iqjO\n CeswsuSMJtufXyrcyAe7UEfpN1/Ctm811+sHyeuGVlhrQkIeuKCj2qSLE9VaIBa3s8nQ\n 587w==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20230601; t=1715701136; x=1716305936;\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=yudQh+9cAzAvlmI5mUHDk5m+pZwFbqBbRBe/82Qf28c=;\n b=R9qvt6sNdd9YQYLaU9ZaSFqBi85obMFtsU0nE2Audv0CHxRhbIw9tsZXu9IdlVXae0\n lIQDJDtK2/Hmh+gTZ/woWqUHevnvZemH77Tru3LQQCjHqT7IDZAFYm4dfxKLlPpQP19E\n RF355QcCCv+HemNIU0VwF6MIp3+JFOlhorEDGbCmXTCo+1PqohOrvLujNYHeiUQb+v2e\n JUcCIDtf+tnIXpvwH02VGCt2iyG1jMIC1P975/qhQ7kPMyK2hVk8odMSHO6iwbKsxuG2\n wrqFEppPZjr+yjZwpsnyrnNEXUvj5lo3HMPQEgtBAHlV8/2yDEmbmlGJ36ioNNHWm4do\n niGw==", "X-Gm-Message-State": "AOJu0YyYM+WhYmkYw5FivYs2Xr8K2626Jo1m5QjnA87eM73xFBHDHGKn\n PXeVyVjF0dz4mJ1TnNeO0ATIT0T40LRhGYoXXt21vqWu4Hk6gu1NiuHCSaBms0eWBfs/M/hCCfA\n IeLY=", "X-Google-Smtp-Source": "\n AGHT+IG1FoCf4q/qEmo+oIN6DbS/1PEa6WyKDSKXGB2AscTzaC7+4rUEW4p3BoVL3K2WpgbuEDR3Kg==", "X-Received": "by 2002:a17:902:6bcb:b0:1e4:c75e:aae2 with SMTP id\n d9443c01a7336-1ef4404fbc3mr139139685ad.59.1715701136379;\n Tue, 14 May 2024 08:38:56 -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 v3 1/7] eal: generic 64 bit counter", "Date": "Tue, 14 May 2024 08:35:04 -0700", "Message-ID": "<20240514153845.42489-2-stephen@networkplumber.org>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20240514153845.42489-1-stephen@networkplumber.org>", "References": "<20240510050507.14381-1-stephen@networkplumber.org>\n <20240514153845.42489-1-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..8068d6d26e\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 <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": [ "v3", "1/7" ] }