From patchwork Mon Mar 28 16:11:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: gary.robertson@linaro.org X-Patchwork-Id: 64538 Delivered-To: patch@linaro.org Received: by 10.112.199.169 with SMTP id jl9csp1531597lbc; Mon, 28 Mar 2016 09:12:56 -0700 (PDT) X-Received: by 10.141.1.87 with SMTP id c84mr39023191qhd.1.1459181575030; Mon, 28 Mar 2016 09:12:55 -0700 (PDT) Return-Path: Received: from lists.linaro.org (lists.linaro.org. [54.225.227.206]) by mx.google.com with ESMTP id s67si21594708qhb.46.2016.03.28.09.12.54; Mon, 28 Mar 2016 09:12:55 -0700 (PDT) Received-SPF: pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) client-ip=54.225.227.206; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) smtp.mailfrom=lng-odp-bounces@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id A73D06185E; Mon, 28 Mar 2016 16:12:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ip-10-142-244-252 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by lists.linaro.org (Postfix) with ESMTP id E843F6184E; Mon, 28 Mar 2016 16:12:02 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 6CC71616FC; Mon, 28 Mar 2016 16:11:52 +0000 (UTC) Received: from mail-ob0-f176.google.com (mail-ob0-f176.google.com [209.85.214.176]) by lists.linaro.org (Postfix) with ESMTPS id 2AB52616FC for ; Mon, 28 Mar 2016 16:11:49 +0000 (UTC) Received: by mail-ob0-f176.google.com with SMTP id fp4so103159791obb.2 for ; Mon, 28 Mar 2016 09:11:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=+ZQRJ3+BF4+FNy0Sf5t2fs2rEts7xdpwftz/6kCcEbY=; b=N7aK1n++kf5E3blkYEAe8kd1BVkzK2+V08S89Iijq4Mdla+DlCHl1VB56ke+dVWkHv JWL2HkZioC6y8A3/aIGUPM3QnOn4NO6ziugfwEvazPg230xBtWwfXujJmrHLDgYiI1CG nxOxktriZJhi+cmPRHtK2QYMD/VE7eePwj4Gkk+STnJbj7MvwKL7E1WN1EK6y/7OpSjT VWtO/jZzwrBxoLvma0K+DkNegyi5sz9NuIa1eTiMsgWWcw6KwCYDRWernYnlymVxpptI bFJTp//VKwlIMKT+Z+UheiHXDCIZPz9006L+eUcqqArP/QX/Q+uXsKE0Do5NYNq2JZSR ca+w== X-Gm-Message-State: AD7BkJKIHk12Lp7IxgraY2y2/i0jyIL+A9ud+ULQt6Wh7x8ZWT5ktjRL2MAhCQjRft68VLm7Wu4= X-Received: by 10.60.142.230 with SMTP id rz6mr12174089oeb.5.1459181508752; Mon, 28 Mar 2016 09:11:48 -0700 (PDT) Received: from honkintosh.cybertech.lan (65-120-133-114.dia.static.qwest.net. [65.120.133.114]) by smtp.googlemail.com with ESMTPSA id 19sm8047972ote.18.2016.03.28.09.11.46 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 28 Mar 2016 09:11:48 -0700 (PDT) From: "Gary S. Robertson" To: mike.holmes@linaro.org, bill.fischofer@linaro.org, maxim.uvarov@linaro.org, anders.roxell@linaro.org, petri.savolainen@linaro.org Date: Mon, 28 Mar 2016 11:11:34 -0500 Message-Id: <1459181498-8134-2-git-send-email-gary.robertson@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1459181498-8134-1-git-send-email-gary.robertson@linaro.org> References: <1456929250-7720-1-git-send-email-gary.robertson@linaro.org> <1459181498-8134-1-git-send-email-gary.robertson@linaro.org> X-Topics: patch Cc: lng-odp@lists.linaro.org Subject: [lng-odp] [PATCH 1/5] test: correct worker count calculation X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" During the process of addressing Linaro BUG 2027 which relates to inaccurate reporting of available CPUs by ODP linux-generic when running atop a kernel compiled with NO_HZ_FULL support, a number of instances were encountered in the validation and performance test software where incorrect methods were used to determine the proper (or maximum) number of worker threads to create. See Linaro BUG 2027 for details. https://bugs.linaro.org/show_bug.cgi?id=2027 The use of odp_cpu_count() for this purpose is incorrect and deprecated... odp_cpumask_default_worker() should always be used to determine the set and number of CPUs available for creating worker threads. The use of odp_cpu_count() for this purpose in conjunction with the correct means of determining available CPUs resulted in some tests hanging in calls to odp_barrier_wait() as the barriers were initialized to expect threads on ALL CPUs rather than on worker CPUs alone... and there were too few worker threads created to satisfy the barriers. The changes below correct all instances I could find of this deprecated technique and allowed all tests to complete successfully with the BUG 2027 patch applied. (BTW they also run correctly without that patch after the application of the modifications included here.) Signed-off-by: Gary S. Robertson --- test/validation/shmem/shmem.c | 3 ++- test/validation/timer/timer.c | 18 ++++++++++-------- 2 files changed, 12 insertions(+), 9 deletions(-) diff --git a/test/validation/shmem/shmem.c b/test/validation/shmem/shmem.c index ba4973d..0bf38d2 100644 --- a/test/validation/shmem/shmem.c +++ b/test/validation/shmem/shmem.c @@ -52,6 +52,7 @@ void shmem_test_odp_shm_sunnyday(void) pthrd_arg thrdarg; odp_shm_t shm; test_shared_data_t *test_shared_data; + odp_cpumask_t unused; shm = odp_shm_reserve(TESTNAME, sizeof(test_shared_data_t), ALIGE_SIZE, 0); @@ -70,7 +71,7 @@ void shmem_test_odp_shm_sunnyday(void) test_shared_data->foo = TEST_SHARE_FOO; test_shared_data->bar = TEST_SHARE_BAR; - thrdarg.numthrds = odp_cpu_count(); + thrdarg.numthrds = odp_cpumask_default_worker(&unused, 0); if (thrdarg.numthrds > MAX_WORKERS) thrdarg.numthrds = MAX_WORKERS; diff --git a/test/validation/timer/timer.c b/test/validation/timer/timer.c index 7b76dbf..aad11aa 100644 --- a/test/validation/timer/timer.c +++ b/test/validation/timer/timer.c @@ -14,7 +14,8 @@ #endif #include -#include +#include +#include #include "odp_cunit_common.h" #include "test_debug.h" #include "timer.h" @@ -41,12 +42,6 @@ static odp_atomic_u32_t ndelivtoolate; * caches may make this number lower than the capacity of the pool */ static odp_atomic_u32_t timers_allocated; -/** @private min() function */ -static int min(int a, int b) -{ - return a < b ? a : b; -} - /* @private Timer helper structure */ struct test_timer { odp_timer_t tim; /* Timer handle */ @@ -457,10 +452,17 @@ void timer_test_odp_timer_all(void) int rc; odp_pool_param_t params; odp_timer_pool_param_t tparam; + odp_cpumask_t unused; + /* Reserve at least one core for running other processes so the timer * test hopefully can run undisturbed and thus get better timing * results. */ - int num_workers = min(odp_cpu_count() - 1, MAX_WORKERS); + int num_workers = odp_cpumask_default_worker(&unused, 0); + + /* force to max CPU count */ + if (num_workers > MAX_WORKERS) + num_workers = MAX_WORKERS; + /* On a single-CPU machine run at least one thread */ if (num_workers < 1) num_workers = 1;