From patchwork Thu Jan 16 05:25:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honnappa Nagarahalli X-Patchwork-Id: 182849 Delivered-To: patch@linaro.org Received: by 2002:a92:1f12:0:0:0:0:0 with SMTP id i18csp7830892ile; Wed, 15 Jan 2020 21:25:34 -0800 (PST) X-Google-Smtp-Source: APXvYqxw2AMPwav/w7CrqE2hoh7yWeWMPQVMVKg9KQCra0z/92rT+Zc5u5oEQcI31GRcrMF6VlbZ X-Received: by 2002:a17:906:4a03:: with SMTP id w3mr1078874eju.263.1579152334002; Wed, 15 Jan 2020 21:25:34 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1579152333; cv=none; d=google.com; s=arc-20160816; b=cX2eTmk1RP3vweFwKEYU1JlX32DqKlu39cvtYnH92pwLEracPzRQwDnFVDePaPycN/ Cmi7jTQf99T+ZC7WJck591wRm19WM5OCRKTOIcBmIPVHubrNM+0ZpszOLsKDS9Ubxjlc 2z6S96YWgT2g/ZcQALz1vtRu4J03MwpwYJgmHTstnjmfqeBZHcg9DsjLLdocVD3EjaO/ v4o/Y1ESZIzW5vviQJuKRdSd9nWQ8J6xCuTOI6SXjUWs0j7YSbj9vM/2BPVCTgobVcmJ jyI3bCi0whUisdB/M47uyMQcffDbOiL7lY40KSA8HKX8MbzQW6ebt9sDB+diMYeHLv9T I+PA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:subject:references:in-reply-to :message-id:date:cc:to:from; bh=kd7M+tGi71+uowfc/4q4UKVLJ2kQBU3mxqjzQTW71bM=; b=O/fF4yh9DHfLd7RAPJ4FYe1KGbq2h/ShtFpTSIKIOE+SjyWqMTbzlDSK+cwh+z+UFc 5LMQrU7fTk41fiwTAaGrw5DllRzV42T4pGh/p/AWViBNtPLlB3S+1Mn69el1DMU7aRht MxQgjIlahy/8NnUiAWcJLoAwpmBApDBExokaIApoGMm/wcHzBsi7CqHCo5/gOawHW2u0 canaUNd1db0oPa4tCIuIDL0xv1VA9l8LMbeRWky1mMuqpWMy4hcmEkgfzt8TTxtNDA01 O8qSJc7O4AEkOB22pUVW5C1OiUr11uxYi3qW/iBBA90D6pz1LFDgF+wWpak6YIe9rySH Wwxw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of dev-bounces@dpdk.org designates 92.243.14.124 as permitted sender) smtp.mailfrom=dev-bounces@dpdk.org Return-Path: Received: from dpdk.org (dpdk.org. [92.243.14.124]) by mx.google.com with ESMTP id r23si15093708edo.79.2020.01.15.21.25.33; Wed, 15 Jan 2020 21:25:33 -0800 (PST) Received-SPF: pass (google.com: domain of dev-bounces@dpdk.org designates 92.243.14.124 as permitted sender) client-ip=92.243.14.124; Authentication-Results: mx.google.com; spf=pass (google.com: domain of dev-bounces@dpdk.org designates 92.243.14.124 as permitted sender) smtp.mailfrom=dev-bounces@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 182DC1BFF7; Thu, 16 Jan 2020 06:25:27 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id A892D1BFEC for ; Thu, 16 Jan 2020 06:25:25 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C6AC11007; Wed, 15 Jan 2020 21:25:24 -0800 (PST) Received: from qc2400f-1.austin.arm.com (qc2400f-1.austin.arm.com [10.118.14.48]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B44A23F534; Wed, 15 Jan 2020 21:25:24 -0800 (PST) From: Honnappa Nagarahalli To: olivier.matz@6wind.com, sthemmin@microsoft.com, jerinj@marvell.com, bruce.richardson@intel.com, david.marchand@redhat.com, pbhagavatula@marvell.com, konstantin.ananyev@intel.com, yipeng1.wang@intel.com, honnappa.nagarahalli@arm.com Cc: dev@dpdk.org, dharmik.thakkar@arm.com, ruifeng.wang@arm.com, gavin.hu@arm.com, nd@arm.com Date: Wed, 15 Jan 2020 23:25:06 -0600 Message-Id: <20200116052511.8557-2-honnappa.nagarahalli@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200116052511.8557-1-honnappa.nagarahalli@arm.com> References: <20190906190510.11146-1-honnappa.nagarahalli@arm.com> <20200116052511.8557-1-honnappa.nagarahalli@arm.com> Subject: [dpdk-dev] [PATCH v9 1/6] test/ring: use division for cycle count calculation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Use division instead of modulo operation to calculate more accurate cycle count. Signed-off-by: Honnappa Nagarahalli Acked-by: Olivier Matz --- app/test/test_ring_perf.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) -- 2.17.1 diff --git a/app/test/test_ring_perf.c b/app/test/test_ring_perf.c index 70ee46ffe..6c2aca483 100644 --- a/app/test/test_ring_perf.c +++ b/app/test/test_ring_perf.c @@ -357,10 +357,10 @@ test_single_enqueue_dequeue(struct rte_ring *r) } const uint64_t mc_end = rte_rdtsc(); - printf("SP/SC single enq/dequeue: %"PRIu64"\n", - (sc_end-sc_start) >> iter_shift); - printf("MP/MC single enq/dequeue: %"PRIu64"\n", - (mc_end-mc_start) >> iter_shift); + printf("SP/SC single enq/dequeue: %.2F\n", + ((double)(sc_end-sc_start)) / iterations); + printf("MP/MC single enq/dequeue: %.2F\n", + ((double)(mc_end-mc_start)) / iterations); } /* @@ -395,13 +395,15 @@ test_burst_enqueue_dequeue(struct rte_ring *r) } const uint64_t mc_end = rte_rdtsc(); - uint64_t mc_avg = ((mc_end-mc_start) >> iter_shift) / bulk_sizes[sz]; - uint64_t sc_avg = ((sc_end-sc_start) >> iter_shift) / bulk_sizes[sz]; + double mc_avg = ((double)(mc_end-mc_start) / iterations) / + bulk_sizes[sz]; + double sc_avg = ((double)(sc_end-sc_start) / iterations) / + bulk_sizes[sz]; - printf("SP/SC burst enq/dequeue (size: %u): %"PRIu64"\n", bulk_sizes[sz], - sc_avg); - printf("MP/MC burst enq/dequeue (size: %u): %"PRIu64"\n", bulk_sizes[sz], - mc_avg); + printf("SP/SC burst enq/dequeue (size: %u): %.2F\n", + bulk_sizes[sz], sc_avg); + printf("MP/MC burst enq/dequeue (size: %u): %.2F\n", + bulk_sizes[sz], mc_avg); } }