From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM02-BL2-obe.outbound.protection.outlook.com (mail-bl2nam02on0049.outbound.protection.outlook.com [104.47.38.49]) by dpdk.org (Postfix) with ESMTP id CE0C92C6D for ; Wed, 6 Sep 2017 12:22:43 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=CAVIUMNETWORKS.onmicrosoft.com; s=selector1-cavium-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=yrvQywKUWp0lg3r9yayS0C7FAvmnVL564EJwAk9+jN8=; b=STjIjGOtWvGYMa1493wDkCI/Qwtc1hB8xCb4ITTG8m1wCxqxAAI+jeRuPrRvIS8YSAgN0NAFENkJjWvh7bmCgnJ85REQzLp1s1QdOQOSt0Z4FzXWMAlXjCRy1IBT9zbbY6JSHzBkmMyQB8DFFCpzGPIWllWAL+np5/nodhXmlfA= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Pavan.Bhagavatula@cavium.com; Received: from PBHAGAVATULA-LT.caveonetworks.com (111.93.218.67) by DM5PR07MB3465.namprd07.prod.outlook.com (10.164.153.20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.13.10; Wed, 6 Sep 2017 10:22:40 +0000 From: Pavan Nikhilesh To: cristian.dumitrescu@intel.com, stephen@networkplumber.org Cc: dev@dpdk.org, Pavan Bhagavatula Date: Wed, 6 Sep 2017 15:51:34 +0530 Message-Id: <1504693294-2100-3-git-send-email-pbhagavatula@caviumnetworks.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1504693294-2100-1-git-send-email-pbhagavatula@caviumnetworks.com> References: <1504693294-2100-1-git-send-email-pbhagavatula@caviumnetworks.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [111.93.218.67] X-ClientProxiedBy: MA1PR01CA0105.INDPRD01.PROD.OUTLOOK.COM (10.174.56.149) To DM5PR07MB3465.namprd07.prod.outlook.com (10.164.153.20) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 7b9d4584-1f63-4197-9ad5-08d4f5113546 X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(300000500095)(300135000095)(300000501095)(300135300095)(300000502095)(300135100095)(22001)(2017030254152)(300000503095)(300135400095)(2017052603199)(201703131423075)(201703031133081)(201702281549075)(300000504095)(300135200095)(300000505095)(300135600095)(300000506095)(300135500095); SRVR:DM5PR07MB3465; X-Microsoft-Exchange-Diagnostics: 1; DM5PR07MB3465; 3:fTPGqbY0wvmPbffzBbwNrmZeoq/WKANZW8QQoAWZw67USjXUrlB0IImFdPCxV62/dOh0lWWw9Fdf7EAqURDmYQKCvCz+XuYGXnaML0DakWj05og3o+2jafkP13NO8STYQ3hDCoEXB8z/OAy6dO0nwMpXZdi9e3OholF6tYa+X1F2lCu4bQ9NUGtdE6WOiTGEQLKR2BFfstjUfj9ZO3Ns71UbESlBLw6Tgxn6b5AmGDJKG3juojhGxG6WSpjR+Q/v; 25:emdBps3FrpT7iatqrDEijRWRt5n4q9hNnkrH2ZPNn1jbi8yqzdb/dlbj6+Ip+mfe1/646bekG/86B+GbQJ1LYW1BXkMj+tafhe4Na/dqejLgzG5lr1ziDV6EVeGU1+UkbITG55psCbSvzlao0MB/HHGhEw0VWFmkWO2GGL5WlsDh2jSCCmJVkzRdhGoOa2f4b7GtETvwVd/GUFCWz+cBl9hQfcT5BPolPx8QxsrbgfwoSTuRKeoEserd/eIQhjHQecr9weQMQLZ0/RAkP+5o/4W8kxik2gqV1FwGugGYwfTC1d0U2lE7FwzK8ysfMk0zX0EOfyW54BP8NRctGOQLJg==; 31:fDl7Je1JAKjJGuM6+jXjuPRcjGCm9fqWFnN6SC/on7K2Q9GVZqEs+wEj+Nfak85C3kdBubVhwofhHVB74IghrlfLh3/zyrBeUOAQg2YBnnOiVM8EIwLqSLFSuEMk3/fmRq9oVdFuBnVRAgDYRexOLVWMm9RaHfNZ0mAlTaWsyqrXtHkX7mpo4LD7IU3YUnonAGq9COvO6dGtnuqt2tpxlY1hRH76aV7S0dBueIj3r/E= X-MS-TrafficTypeDiagnostic: DM5PR07MB3465: X-Microsoft-Exchange-Diagnostics: 1; DM5PR07MB3465; 20: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; 4:Fs9MFSo9/uodi7oujBzdS80/JNHoKTU7Ac3Ci0fP4YzF6Apd6xDBYRoOcLRW+9js5E5PxSEEvSu68ZWu25jWfF1SGPJg3jqI6Z+wZYRvbeZnozrMNiB1I16Q7k8rj8YC/ApSKFsDR5jvBLfuYA/IRDHZTSBnW3ka5fuMJCVxMCgBiL6rnUYC5gtzlupunoTx8zjqSVapCVTT2VEbt7iN8ze/+h4Qs3kngiy29oaEJAAvVKqfAS/Lrn4w6F1ieI8v X-Exchange-Antispam-Report-Test: UriScan:; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(100000700101)(100105000095)(100000701101)(100105300095)(100000702101)(100105100095)(6040450)(2401047)(8121501046)(5005006)(100000703101)(100105400095)(93006095)(3002001)(10201501046)(6041248)(20161123555025)(201703131423075)(201702281528075)(201703061421075)(201703061406153)(20161123560025)(20161123564025)(20161123562025)(20161123558100)(6072148)(201708071742011)(100000704101)(100105200095)(100000705101)(100105500095); SRVR:DM5PR07MB3465; BCL:0; PCL:0; RULEID:(100000800101)(100110000095)(100000801101)(100110300095)(100000802101)(100110100095)(100000803101)(100110400095)(100000804101)(100110200095)(100000805101)(100110500095); SRVR:DM5PR07MB3465; X-Forefront-PRVS: 0422860ED4 X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10009020)(6009001)(199003)(189002)(101416001)(5003940100001)(2906002)(25786009)(76176999)(50986999)(189998001)(4326008)(5660300001)(33646002)(106356001)(8936002)(42186005)(3846002)(81156014)(6116002)(72206003)(53416004)(81166006)(8676002)(105586002)(42882006)(50226002)(6666003)(36756003)(2950100002)(48376002)(68736007)(5009440100003)(66066001)(7736002)(69596002)(50466002)(6512007)(478600001)(107886003)(110136004)(6486002)(6506006)(47776003)(97736004)(53936002)(305945005)(42262002); DIR:OUT; SFP:1101; SCL:1; SRVR:DM5PR07MB3465; H:PBHAGAVATULA-LT.caveonetworks.com; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; Received-SPF: None (protection.outlook.com: cavium.com does not designate permitted sender hosts) X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; DM5PR07MB3465; 23:UVtq7tVJrJeJbEhDcxZg54dhqketuxtAB5eF2B4xg?= =?us-ascii?Q?ADm1yYwKV5HS9LvUfEC+oGYbPMWBBiRiib7+Yhi0xCN6B1TEwq/gUqcX1p28?= =?us-ascii?Q?c1dSluSZ8DfJR4bAyfbR4ZzgkVx6kkd8L8wwGIM8MI0BcbPHy61JPPEi37l2?= =?us-ascii?Q?xGVrkxvcWu/9VXfR4svepkQfIviBJuUzZ9PTeqX6yDPQMyBxZpV2aZvliuBu?= =?us-ascii?Q?9aT7jDbtOHHV2P2xdmTggTpBb4FSvtumfmBFQbFm4Rm+BlKc5+Wc4TpqTFpM?= =?us-ascii?Q?MohfQld+zZ++a0ls+dB20soEBGL5DraDLrhJbXUf+LVysXQOt45GcAom1e5V?= =?us-ascii?Q?v+TPT8QFef0qPyBC3NzIa41itzyKDgGn1y+EE/GExzgIkYVMAUeDffwksKOR?= =?us-ascii?Q?1BIHV6TNk3LnF8HL67Mv39cGksSUCiEc1ipkgEGyySXCehner4xOVlCoRk4N?= =?us-ascii?Q?hRh8SP7jyMuCvkU03WdOHxxdpZna8WpjMSm75VnJsegxGkKFLUjHtzJ74nYg?= =?us-ascii?Q?FPkBrZkGQ8w8jamysuPlD+XBnxNWvAh9SzoJhv1qSW6Sg4/MY4bwovkG7zGr?= =?us-ascii?Q?gl5BZgyHJwide8zIjpDpNhaSjOCG6xO/GQWMr21T8lGuyi2V1kjYGmUsA9eU?= =?us-ascii?Q?MSp/F7vmJDs75cVw6tMBwzf7xR5EZXI3y2JM7gJtxLg4pG9EyLeqRwRTKqe1?= =?us-ascii?Q?5V2yA5KJy5NwxDYFPT9jF0/WfyNXLJAXcMa71L8zdltXEHf4p7s3BnjeO5fe?= =?us-ascii?Q?14ABXz+rlUFNDLS+CtSXQy7PHxlrpz0d7jUv2j5my0ao2g03IKHXfO2objSo?= =?us-ascii?Q?+mANC6dOVLGt5oCjxUcC9K2xf8WFMPN4agHLN7jJlToYzcJ0K9W0dj6Jw9dG?= =?us-ascii?Q?WQkZSTQneErkhxAqNl0fw3rbqG3e0n0/FYAi0u5cGvgeEGKmo0RFCUet2dub?= =?us-ascii?Q?yoxVy+qRhQx+LOucO2zxCBBiT7dZJsbH/v6mk/taxv2q6VxsIKCCfwvJOrl6?= =?us-ascii?Q?S9COPKGQiq1cPO2tq8nNWbI2i3AdDvbewkshziCht1O2u/qkKdJb/SvJ3uTA?= =?us-ascii?Q?EYW9FMhuE7FvhciZwIdnqNpDASKaAXcmXWSTR1OBJmVfrlzHwnsJfTJIFzex?= =?us-ascii?Q?oJexW3qk0yz9jKFFRr6Mh+LqzC683ya?= X-Microsoft-Exchange-Diagnostics: 1; DM5PR07MB3465; 6:6EVSc/WnQamgw9daHae0zn/7Llez5Fo4oCEEzPg4nhwdmygLSHKAGpEGXpPdMf0a+nX4bR9uoSe8pFuHcI7vGST0NU7kVIV7vjoBzoidYPNrzOkZqglDmx4Q0qC63u7TVNwh2NN4AVmaPJwr6G0mDnPE4bJptokoZW3ljiOvnnu40vxswe2cKYV3BzxD89pEigNKSFaqkzkDyCL+NFwWbxz8ltLWtYvtBcuXjA+gWgKB27Sw/HaeD57VmwXRQZRxTVXu2NZP3RD+DVwR6R093aDVKo5gr9P/Ta6REsj6xqIqfj9GxbYvBhBu9NPBEsJW42MqVE75k/8Px8izpkOXqQ==; 5:TBwkB0G3NpY/Hzpi5jYxjsRGlMY1SPppSZYo5Q8illqNRapnV4PUvlQaqWpJhi7uPR20ZteTwEig3fuoxSsGEHqZUBmyOzkWyCA1D90n1iPd7gMwtLW6OB1Ufag9gWn9pYqP9x5eFrqr4QLpbaMjMtIC6cW3KHana7MpqT3rwc8=; 24:dNBWH2WqxtgsmeAQweLkg5wQGg4Ic9qW4qwunacKdBn6Avp1TNMOEEoYwyUhbO3qDDzuKEwRmB+0pjRjsOLa0FQeOnlZ8uyD5KFVJsqrjSc=; 7:0hCSQErbHogtXOunBX12hpdb6Rs1q/gaXwwOdP1J5qwGo8RECOkHQbQQHe899eYIUyvTn0qkcGH8oyAyfyMUyg7/+jD0hzq3lgCchgd7NTNNGsgD8avF53Z1zQGAXpcd0eF45CdvSceHMCwdE2wTd1mS2JD8T+werE9ZX1L1w26k8d/NcgWvSgzG7X1z/bzvlfatZcaP1U0H2oSC0Gl4+0Wni8lRKY4IlaG+IgB9Rf4= SpamDiagnosticOutput: 1:99 SpamDiagnosticMetadata: NSPM X-OriginatorOrg: caviumnetworks.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Sep 2017 10:22:40.5963 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 711e4ccf-2e9b-4bcf-a551-4094005b6194 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR07MB3465 Subject: [dpdk-dev] [PATCH v6 3/3] test: add tests for reciprocal based division 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: , X-List-Received-Date: Wed, 06 Sep 2017 10:22:44 -0000 From: Pavan Bhagavatula This commit provides a set of tests for verifying the correctness and performance of both unsigned 32 and 64bit reciprocal based division. Signed-off-by: Pavan Nikhilesh --- test/test/Makefile | 2 + test/test/test_reciprocal_division.c | 109 +++++++++++++++++ test/test/test_reciprocal_division_perf.c | 193 ++++++++++++++++++++++++++++++ 3 files changed, 304 insertions(+) create mode 100644 test/test/test_reciprocal_division.c create mode 100644 test/test/test_reciprocal_division_perf.c diff --git a/test/test/Makefile b/test/test/Makefile index 42d9a49..6017862 100644 --- a/test/test/Makefile +++ b/test/test/Makefile @@ -94,6 +94,8 @@ SRCS-y += test_cycles.c SRCS-y += test_spinlock.c SRCS-y += test_memory.c SRCS-y += test_memzone.c +SRCS-y += test_reciprocal_division.c +SRCS-y += test_reciprocal_division_perf.c SRCS-y += test_ring.c SRCS-y += test_ring_perf.c diff --git a/test/test/test_reciprocal_division.c b/test/test/test_reciprocal_division.c new file mode 100644 index 0000000..771ea64 --- /dev/null +++ b/test/test/test_reciprocal_division.c @@ -0,0 +1,109 @@ +/* + * BSD LICENSE + * + * Copyright (C) Cavium, Inc. 2017. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Cavium, Inc nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "test.h" + +#include +#include +#include + +#include +#include +#include +#include + +#define MAX_ITERATIONS 1000000 +#define DIVIDE_ITER 100 + +static int +test_reciprocal_division(void) +{ + int i; + int result = 0; + uint32_t divisor_u32 = 0; + uint32_t dividend_u32; + uint32_t nresult_u32; + uint32_t rresult_u32; + uint64_t divisor_u64 = 0; + uint64_t dividend_u64; + uint64_t nresult_u64; + uint64_t rresult_u64; + struct rte_reciprocal_u32 reci_u32; + struct rte_reciprocal_u64 reci_u64; + + rte_srand(rte_rdtsc()); + printf("Validating unsigned 32bit division.\n"); + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u32 = rte_rand(); + reci_u32 = rte_reciprocal_value_u32(divisor_u32); + } + + dividend_u32 = rte_rand(); + nresult_u32 = dividend_u32 / divisor_u32; + rresult_u32 = rte_reciprocal_divide_u32(dividend_u32, + &reci_u32); + if (nresult_u32 != rresult_u32) { + printf("Division failed, expected %"PRIu32" " + "result %"PRIu32"", + nresult_u32, rresult_u32); + result = 1; + break; + } + } + + printf("Validating unsigned 64bit division.\n"); + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u64 = rte_rand(); + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + } + + dividend_u64 = rte_rand(); + nresult_u64 = dividend_u64 / divisor_u64; + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + if (nresult_u64 != rresult_u64) { + printf("Division failed, expected %"PRIu64" " + "result %"PRIu64"", + nresult_u64, rresult_u64); + result = 1; + break; + } + } + + return result; +} + +REGISTER_TEST_COMMAND(reciprocal_division, test_reciprocal_division); diff --git a/test/test/test_reciprocal_division_perf.c b/test/test/test_reciprocal_division_perf.c new file mode 100644 index 0000000..3eaf575 --- /dev/null +++ b/test/test/test_reciprocal_division_perf.c @@ -0,0 +1,193 @@ +/* + * BSD LICENSE + * + * Copyright (C) Cavium, Inc. 2017. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Cavium, Inc nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "test.h" + +#include +#include +#include + +#include +#include +#include +#include + +#define MAX_ITERATIONS 1000000 +#define DIVIDE_ITER 100 + +static int +test_reciprocal_division_perf(void) +{ + int result = 0; + uint32_t divisor_u32 = 0; + volatile uint32_t dividend_u32; + uint32_t nresult_u32; + uint32_t rresult_u32; + uint64_t divisor_u64 = 0; + volatile uint64_t dividend_u64; + uint64_t nresult_u64; + uint64_t rresult_u64; + uint64_t start_cyc; + uint64_t split_cyc; + uint64_t end_cyc; + uint64_t tot_cyc_n = 0; + uint64_t tot_cyc_r = 0; + uint64_t i; + struct rte_reciprocal_u32 reci_u32 = {0}; + struct rte_reciprocal_u64 reci_u64 = {0}; + + rte_srand(rte_rdtsc()); + + printf("Validating unsigned 32bit division.\n"); + + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u32 = rte_rand(); + reci_u32 = rte_reciprocal_value_u32(divisor_u32); + } + + dividend_u32 = rte_rand(); + + start_cyc = rte_rdtsc(); + nresult_u32 = dividend_u32 / divisor_u32; + split_cyc = rte_rdtsc(); + rresult_u32 = rte_reciprocal_divide_u32(dividend_u32, + &reci_u32); + end_cyc = rte_rdtsc(); + + tot_cyc_n += split_cyc - start_cyc; + tot_cyc_r += end_cyc - split_cyc; + if (nresult_u32 != rresult_u32) { + printf("Division failed, expected %"PRIu32" " + "result %"PRIu32"", + nresult_u32, rresult_u32); + result = 1; + break; + } + } + printf("32bit Division results:\n"); + printf("Total number of cycles normal division : %"PRIu64"\n", + tot_cyc_n); + printf("Total number of cycles reciprocal division : %"PRIu64"\n", + tot_cyc_r); + printf("Cycles per division(normal) : %3.2f\n", + ((double)tot_cyc_n)/i); + printf("Cycles per division(reciprocal) : %3.2f\n\n", + ((double)tot_cyc_r)/i); + + tot_cyc_n = 0; + tot_cyc_r = 0; + + printf("Validating unsigned 64bit division.\n"); + + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u64 = rte_rand(); + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + } + + dividend_u64 = rte_rand(); + + start_cyc = rte_rdtsc(); + nresult_u64 = dividend_u64 / divisor_u64; + split_cyc = rte_rdtsc(); + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + end_cyc = rte_rdtsc(); + + tot_cyc_n += split_cyc - start_cyc; + tot_cyc_r += end_cyc - split_cyc; + if (nresult_u64 != rresult_u64) { + printf("Division failed, expected %"PRIu64" " + "result %"PRIu64"", + nresult_u64, rresult_u64); + result = 1; + break; + } + } + printf("64bit Division results:\n"); + printf("Total number of cycles normal division : %"PRIu64"\n", + tot_cyc_n); + printf("Total number of cycles reciprocal division : %"PRIu64"\n", + tot_cyc_r); + printf("Cycles per division(normal) : %3.2f\n", + ((double)tot_cyc_n)/i); + printf("Cycles per division(reciprocal) : %3.2f\n\n", + ((double)tot_cyc_r)/i); + + tot_cyc_n = 0; + tot_cyc_r = 0; + + printf("Validating unsigned 64bit division with 32bit divisor.\n"); + + for (i = 0; i < MAX_ITERATIONS; i++) { + /* Change divisor every DIVIDE_ITER iterations. */ + if (i % DIVIDE_ITER == 0) { + divisor_u64 = rte_rand() >> 32; + reci_u64 = rte_reciprocal_value_u64(divisor_u64); + } + + dividend_u64 = rte_rand(); + + start_cyc = rte_rdtsc(); + nresult_u64 = dividend_u64 / divisor_u64; + split_cyc = rte_rdtsc(); + rresult_u64 = rte_reciprocal_divide_u64(dividend_u64, + &reci_u64); + end_cyc = rte_rdtsc(); + + tot_cyc_n += split_cyc - start_cyc; + tot_cyc_r += end_cyc - split_cyc; + if (nresult_u64 != rresult_u64) { + printf("Division failed, expected %"PRIu64" " + "result %"PRIu64"", + nresult_u64, rresult_u64); + result = 1; + break; + } + } + printf("64bit Division results:\n"); + printf("Total number of cycles normal division : %"PRIu64"\n", + tot_cyc_n); + printf("Total number of cycles reciprocal division : %"PRIu64"\n", + tot_cyc_r); + printf("Cycles per division(normal) : %3.2f\n", + ((double)tot_cyc_n)/i); + printf("Cycles per division(reciprocal) : %3.2f\n", + ((double)tot_cyc_r)/i); + + return result; +} + +REGISTER_TEST_COMMAND(reciprocal_division_perf, test_reciprocal_division_perf); -- 2.7.4