From patchwork Mon Jan 13 17:25:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honnappa Nagarahalli X-Patchwork-Id: 182815 Delivered-To: patch@linaro.org Received: by 2002:ac9:44c4:0:0:0:0:0 with SMTP id t4csp4564463och; Mon, 13 Jan 2020 09:41:35 -0800 (PST) X-Google-Smtp-Source: APXvYqw4fOBPRvOiUoS8y0E6ew9CxfNnNlRiH1MsGFs66la3r5uy00mA1mcZT5Ae2YsvtSSsfHXI X-Received: by 2002:aa7:d34d:: with SMTP id m13mr18791644edr.140.1578936345866; Mon, 13 Jan 2020 09:25:45 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1578936345; cv=none; d=google.com; s=arc-20160816; b=K8iy38p05MdqSsRD57bqj0ootys/TzMLTdmNFatNFDtf1TEzWHCTS4+4bSLhsjzWJp UeDfT4Jasw1RJbhbLXduuSzq2XRjrGRC5wKudZNxC2a3aUaLnSj7+NdGyCHq6N6NbjCd j9t19avT+Nz9BWxOGIFH0DC7U0WGTb0QR0jR4kWcSqgVBBS/29x4E9ar/xvbP8xOv39h 6yYSyieBjI1BYlIe7f+v78mEPjICxhTUMKpWxw/GqkvvF02g/FovgZREXOQQR0kHEcKB t+RsiCP9v58ygKkv7oOwmPTXV2lonHqjUcxiiIj7iB2j0IN9/iByfl6ErYY8oBtzqbyY v0Jg== 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=kRyu1BRVNFpwf6hiCVnpkmrTRm6f4t8kXvKgPTmfBY3tAgPq831xDaQ9fyp9P4UDdd 4eAUbg7I9lfwFLE5WYvObrbggG9+ilVJfMhDKF5ryQOak/cWt1tH7o7bZKHVsjbCx3qy OMwNeZHX1uVch2RJBI3FMI1AZyfAc7holchl/cVMN09JZIhcaWdqsiz5wwz6K8teLfL8 ounYEtz24YQJKufIjkZHMlF80MDaCjbOyaWuh0shlPSU8mnSLdyqZQsF05UFX4DxpQ7L UW0TbYJMRuGiFrzgctnrr/wPXab8aF1K8aFZPyM3BH1nWtzlr1EeP7p5ON8xZg94nea7 rV+w== 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 i8si7694926edv.38.2020.01.13.09.25.45; Mon, 13 Jan 2020 09:25:45 -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 01F4B1D170; Mon, 13 Jan 2020 18:25:41 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 0ADE51D16E for ; Mon, 13 Jan 2020 18:25:40 +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 7C93411B3; Mon, 13 Jan 2020 09:25:39 -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 6A2D73F534; Mon, 13 Jan 2020 09:25:39 -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, honnappa.nagarahalli@arm.com Cc: dev@dpdk.org, dharmik.thakkar@arm.com, ruifeng.wang@arm.com, gavin.hu@arm.com, nd@arm.com Date: Mon, 13 Jan 2020 11:25:13 -0600 Message-Id: <20200113172518.37815-2-honnappa.nagarahalli@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200113172518.37815-1-honnappa.nagarahalli@arm.com> References: <20190906190510.11146-1-honnappa.nagarahalli@arm.com> <20200113172518.37815-1-honnappa.nagarahalli@arm.com> Subject: [dpdk-dev] [PATCH v8 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); } }