From patchwork Mon Oct 21 00:22:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honnappa Nagarahalli X-Patchwork-Id: 177007 Delivered-To: patch@linaro.org Received: by 2002:a92:409a:0:0:0:0:0 with SMTP id d26csp2676778ill; Sun, 20 Oct 2019 17:23:49 -0700 (PDT) X-Google-Smtp-Source: APXvYqyA7/QqaQBhhYFfbMfq8C2zAGKgDOMXfEyOblIhUI2Jp0NTSBZQ6qsL4UdPgbt2++ms4R4C X-Received: by 2002:a50:fe0f:: with SMTP id f15mr21607380edt.89.1571617429244; Sun, 20 Oct 2019 17:23:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1571617429; cv=none; d=google.com; s=arc-20160816; b=sK73zWJG17gykiyxaKUNeYUTaen9O7z3pXBmnRmCN11mzxsE+5usVgFF58jXNEkzkH EAfLNuR4OZPC9gJqI66W6XSAy44/d084QzZzUlbw4oSiOa+Mzbj4FP9qpki/ADPNZaJR V2gwtumRcANxXUuoqSeRGtsP70malSnKnLohHEs9OV3bfD10IGG2rs6Ut38u6Bq5OfJS AaobROgA8s1g1yXASHIEASR0lsHaJMHCfpPGA+2fTCG5cqfexcfVURPiZK0fEoCIqOFJ M90jomOir9Vpnf/6vbO1IWE5i8e9//mF7ivOvsyFH8CdletGISIibBXmysqroYWucNno wBGA== 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=+6cdn6GR89rZ2B1N4hRNBRD+UoRk286p2g0JpIcoKEw=; b=0tkbesDm7pv4Zl040CIlmiH0nMTHuJtOEg+vhk4GbKB4fdCJ6/ZNVusgPhZ27fUFeH hajBrun5K9yXmaQcg3WZbCLKS9JPpfp4xCeJTj4f+tGuXF4/vbSQGooSsn4nzb76+oIm vttQFymC8EyNWmp9RUx3vA624jIfOYJQwZRLsnO8kmsGykHd3uQMqREE5bbWPYqNDG6x WABrL014GL501z/9rIkCSPcDIc3LEFCGnWp764z/T3gFCLgStJ6AVk+e8l3fGJRD/l6y sqE8nFgWrDaKeRPeAWxj28LL1bIYUFRPzwWPFe1oK+v6IkVCW+Ehz0iM9bXlEM0r6Apm CsCA== 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 f13si9108037eda.277.2019.10.20.17.23.49; Sun, 20 Oct 2019 17:23:49 -0700 (PDT) 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 D02301252; Mon, 21 Oct 2019 02:23:42 +0200 (CEST) Received: from foss.arm.com (unknown [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 7487CF90 for ; Mon, 21 Oct 2019 02:23:40 +0200 (CEST) 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 1C43837B; Sun, 20 Oct 2019 17:23:31 -0700 (PDT) Received: from qc2400f-1.austin.arm.com (qc2400f-1.austin.arm.com [10.118.12.34]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 099D43F71F; Sun, 20 Oct 2019 17:23:31 -0700 (PDT) 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, drc@linux.vnet.ibm.com, hemant.agrawal@nxp.com, honnappa.nagarahalli@arm.com Cc: dev@dpdk.org, dharmik.thakkar@arm.com, ruifeng.wang@arm.com, gavin.hu@arm.com Date: Sun, 20 Oct 2019 19:22:55 -0500 Message-Id: <20191021002300.26497-2-honnappa.nagarahalli@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191021002300.26497-1-honnappa.nagarahalli@arm.com> References: <20190906190510.11146-1-honnappa.nagarahalli@arm.com> <20191021002300.26497-1-honnappa.nagarahalli@arm.com> Subject: [dpdk-dev] [RFC v6 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 --- app/test/test_ring_perf.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) -- 2.17.1 Acked-by: Olivier Matz diff --git a/app/test/test_ring_perf.c b/app/test/test_ring_perf.c index b6ad703bb..e3e17f251 100644 --- a/app/test/test_ring_perf.c +++ b/app/test/test_ring_perf.c @@ -284,10 +284,10 @@ 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); } /* @@ -322,13 +322,15 @@ 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); } }