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GET /api/patches/75243/?format=api
http://patches.dpdk.org/api/patches/75243/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20200805154601.19609-5-steven.lariau@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": "<20200805154601.19609-5-steven.lariau@arm.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20200805154601.19609-5-steven.lariau@arm.com", "date": "2020-08-05T15:46:01", "name": "[4/4] test/stack: remove atomics operations", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "e5e1876dd390a785d5be23704e37af8a2b66f570", "submitter": { "id": 1862, "url": "http://patches.dpdk.org/api/people/1862/?format=api", "name": "Steven Lariau", "email": "steven.lariau@arm.com" }, "delegate": null, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20200805154601.19609-5-steven.lariau@arm.com/mbox/", "series": [ { "id": 11525, "url": "http://patches.dpdk.org/api/series/11525/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=11525", "date": "2020-08-05T15:45:57", "name": "test/stack: improve multithreaded test", "version": 1, "mbox": "http://patches.dpdk.org/series/11525/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/75243/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/75243/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 dpdk.org (dpdk.org [92.243.14.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 6EF39A0351;\n\tThu, 6 Aug 2020 12:28:03 +0200 (CEST)", "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 4BA551C10E;\n\tThu, 6 Aug 2020 12:27:39 +0200 (CEST)", "from foss.arm.com (foss.arm.com [217.140.110.172])\n by dpdk.org (Postfix) with ESMTP id CAF6D2B98\n for <dev@dpdk.org>; Wed, 5 Aug 2020 17:46:27 +0200 (CEST)", "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 56D501424;\n Wed, 5 Aug 2020 08:46:27 -0700 (PDT)", "from localhost.localdomain (unknown [10.57.38.158])\n by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7831C3F7D7;\n Wed, 5 Aug 2020 08:46:26 -0700 (PDT)" ], "From": "Steven Lariau <steven.lariau@arm.com>", "To": "Gage Eads <gage.eads@intel.com>,\n\tOlivier Matz <olivier.matz@6wind.com>", "Cc": "dev@dpdk.org, honnappa.nagarahalli@arm.com, nd@arm.com,\n Steven Lariau <steven.lariau@arm.com>", "Date": "Wed, 5 Aug 2020 16:46:01 +0100", "Message-Id": "<20200805154601.19609-5-steven.lariau@arm.com>", "X-Mailer": "git-send-email 2.17.1", "In-Reply-To": "<20200805154601.19609-1-steven.lariau@arm.com>", "References": "<20200805154601.19609-1-steven.lariau@arm.com>", "X-Mailman-Approved-At": "Thu, 06 Aug 2020 12:27:33 +0200", "Subject": "[dpdk-dev] [PATCH 4/4] test/stack: remove atomics operations", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "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", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Remove the part that checks if there is enough room in the stack, it's\nalways true as long as size of stack >= MAX_BULK*rte_lcore_count().\nThis check used an atomic cmpset, and read / write to a shared size\nvariable. These operations result in some form of synchronization\nthat might get in the way of the actual stack testing.\n\nSigned-off-by: Steven Lariau <steven.lariau@arm.com>\nReviewed-by: Dharmik Thakkar <dharmik.thakkar@arm.com>\nReviewed-by: Phil Yang <phil.yang@arm.com>\nReviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>\n---\n app/test/test_stack.c | 23 +++--------------------\n 1 file changed, 3 insertions(+), 20 deletions(-)", "diff": "diff --git a/app/test/test_stack.c b/app/test/test_stack.c\nindex b9d6befd4..02bea7ec5 100644\n--- a/app/test/test_stack.c\n+++ b/app/test/test_stack.c\n@@ -273,7 +273,6 @@ test_free_null(void)\n \n struct test_args {\n \tstruct rte_stack *s;\n-\trte_atomic64_t *sz;\n };\n \n static int\n@@ -284,21 +283,9 @@ stack_thread_push_pop(void *args)\n \tint i;\n \n \tfor (i = 0; i < NUM_ITERS_PER_THREAD; i++) {\n-\t\tunsigned int success, num;\n+\t\tunsigned int num;\n \n-\t\t/* Reserve up to min(MAX_BULK, available slots) stack entries,\n-\t\t * then push and pop those stack entries.\n-\t\t */\n-\t\tdo {\n-\t\t\tuint64_t sz = rte_atomic64_read(t->sz);\n-\t\t\tvolatile uint64_t *sz_addr;\n-\n-\t\t\tsz_addr = (volatile uint64_t *)t->sz;\n-\n-\t\t\tnum = RTE_MIN(rte_rand() % MAX_BULK, STACK_SIZE - sz);\n-\n-\t\t\tsuccess = rte_atomic64_cmpset(sz_addr, sz, sz + num);\n-\t\t} while (success == 0);\n+\t\tnum = rte_rand() % MAX_BULK;\n \n \t\tif (rte_stack_push(t->s, obj_table, num) != num) {\n \t\t\tprintf(\"[%s():%u] Failed to push %u pointers\\n\",\n@@ -312,7 +299,6 @@ stack_thread_push_pop(void *args)\n \t\t\treturn -1;\n \t\t}\n \n-\t\trte_atomic64_sub(t->sz, num);\n \t}\n \n \treturn 0;\n@@ -324,7 +310,6 @@ test_stack_multithreaded(uint32_t flags)\n \tstruct test_args args;\n \tunsigned int lcore_id;\n \tstruct rte_stack *s;\n-\trte_atomic64_t size;\n \tint result = 0;\n \n \tif (rte_lcore_count() < 2) {\n@@ -335,16 +320,14 @@ test_stack_multithreaded(uint32_t flags)\n \tprintf(\"[%s():%u] Running with %u lcores\\n\",\n \t __func__, __LINE__, rte_lcore_count());\n \n-\ts = rte_stack_create(\"test\", STACK_SIZE, rte_socket_id(), flags);\n+\ts = rte_stack_create(\"test\", MAX_BULK * rte_lcore_count(), rte_socket_id(), flags);\n \tif (s == NULL) {\n \t\tprintf(\"[%s():%u] Failed to create a stack\\n\",\n \t\t __func__, __LINE__);\n \t\treturn -1;\n \t}\n \n-\trte_atomic64_init(&size);\n \targs.s = s;\n-\targs.sz = &size;\n \n \tif (rte_eal_mp_remote_launch(stack_thread_push_pop, &args, CALL_MASTER))\n \t\trte_panic(\"Failed to launch tests\\n\");\n", "prefixes": [ "4/4" ] }{ "id": 75243, "url": "