From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 735C58DAA for ; Wed, 30 Sep 2015 14:12:25 +0200 (CEST) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 30 Sep 2015 05:12:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,612,1437462000"; d="scan'208";a="800473283" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga001.fm.intel.com with ESMTP; 30 Sep 2015 05:12:23 -0700 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id t8UCCMhT015014; Wed, 30 Sep 2015 13:12:22 +0100 Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id t8UCCMwb024444; Wed, 30 Sep 2015 13:12:22 +0100 Received: (from bricha3@localhost) by sivswdev01.ir.intel.com with id t8UCCMDm024440; Wed, 30 Sep 2015 13:12:22 +0100 From: Bruce Richardson To: dev@dpdk.org Date: Wed, 30 Sep 2015 13:12:22 +0100 Message-Id: <1443615142-24381-5-git-send-email-bruce.richardson@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1443615142-24381-1-git-send-email-bruce.richardson@intel.com> References: <1443615142-24381-1-git-send-email-bruce.richardson@intel.com> Subject: [dpdk-dev] [PATCH 4/4] test: Add perf test for ring pmd X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Sep 2015 12:12:26 -0000 Add a performance test for ring pmd, comparing performance of the pmd compared to the basic rte_ring APIs. Signed-off-by: Bruce Richardson --- app/test/Makefile | 1 + app/test/test_pmd_ring_perf.c | 188 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 189 insertions(+) create mode 100644 app/test/test_pmd_ring_perf.c diff --git a/app/test/Makefile b/app/test/Makefile index 294618f..14fa502 100644 --- a/app/test/Makefile +++ b/app/test/Makefile @@ -141,6 +141,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_PMD_BOND) += test_link_bonding_mode4.c endif SRCS-$(CONFIG_RTE_LIBRTE_PMD_RING) += test_pmd_ring.c +SRCS-$(CONFIG_RTE_LIBRTE_PMD_RING) += test_pmd_ring_perf.c SRCS-$(CONFIG_RTE_LIBRTE_KVARGS) += test_kvargs.c CFLAGS += -O3 diff --git a/app/test/test_pmd_ring_perf.c b/app/test/test_pmd_ring_perf.c new file mode 100644 index 0000000..3077dba --- /dev/null +++ b/app/test/test_pmd_ring_perf.c @@ -0,0 +1,188 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. All rights reserved. + * All rights reserved. + * + * 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 Intel Corporation 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 +#include +#include +#include +#include +#include +#include + +#include "test.h" + +#define RING_NAME "RING_PERF" +#define RING_SIZE 4096 +#define MAX_BURST 32 + +/* + * the sizes to enqueue and dequeue in testing + * (marked volatile so they won't be seen as compile-time constants) + */ +static const volatile unsigned bulk_sizes[] = { 1, 8, 32 }; + +/* The ring structure used for tests */ +static struct rte_ring *r; +static uint8_t ring_ethdev_port; + +/* Get cycle counts for dequeuing from an empty ring. Should be 2 or 3 cycles */ +static void +test_empty_dequeue(void) +{ + const unsigned iter_shift = 26; + const unsigned iterations = 1 << iter_shift; + unsigned i = 0; + void *burst[MAX_BURST]; + + const uint64_t sc_start = rte_rdtsc(); + for (i = 0; i < iterations; i++) + rte_ring_sc_dequeue_bulk(r, burst, bulk_sizes[0]); + const uint64_t sc_end = rte_rdtsc(); + + const uint64_t eth_start = rte_rdtsc(); + for (i = 0; i < iterations; i++) + rte_eth_rx_burst(ring_ethdev_port, 0, (void *)burst, + bulk_sizes[0]); + const uint64_t eth_end = rte_rdtsc(); + + printf("Ring empty dequeue : %.1F\n", + (double)(sc_end - sc_start) / iterations); + printf("Ethdev empty dequeue: %.1F\n", + (double)(eth_end - eth_start) / iterations); +} + +/* + * Test function that determines how long an enqueue + dequeue of a single item + * takes on a single lcore. Result is for comparison with the bulk enq+deq. + */ +static void +test_single_enqueue_dequeue(void) +{ + const unsigned iter_shift = 24; + const unsigned iterations = 1 << iter_shift; + unsigned i = 0; + void *burst = NULL; + struct rte_mbuf *mburst[1] = { NULL }; + + const uint64_t sc_start = rte_rdtsc_precise(); + rte_compiler_barrier(); + for (i = 0; i < iterations; i++) { + rte_ring_enqueue_bulk(r, &burst, 1); + rte_ring_dequeue_bulk(r, &burst, 1); + } + const uint64_t sc_end = rte_rdtsc_precise(); + rte_compiler_barrier(); + + const uint64_t eth_start = rte_rdtsc_precise(); + rte_compiler_barrier(); + for (i = 0; i < iterations; i++) { + rte_eth_tx_burst(ring_ethdev_port, 0, mburst, 1); + rte_eth_rx_burst(ring_ethdev_port, 0, mburst, 1); + } + const uint64_t eth_end = rte_rdtsc_precise(); + rte_compiler_barrier(); + + printf("Ring single enq/dequeue : %"PRIu64"\n", + (sc_end-sc_start) >> iter_shift); + printf("Ethdev single enq/dequeue: %"PRIu64"\n", + (eth_end-eth_start) >> iter_shift); +} + +/* Times enqueue and dequeue on a single lcore */ +static void +test_bulk_enqueue_dequeue(void) +{ + const unsigned iter_shift = 23; + const unsigned iterations = 1 << iter_shift; + unsigned sz, i = 0; + struct rte_mbuf *burst[MAX_BURST] = {0}; + + for (sz = 0; sz < sizeof(bulk_sizes)/sizeof(bulk_sizes[0]); sz++) { + const uint64_t sc_start = rte_rdtsc(); + for (i = 0; i < iterations; i++) { + rte_ring_sp_enqueue_bulk(r, (void *)burst, bulk_sizes[sz]); + rte_ring_sc_dequeue_bulk(r, (void *)burst, bulk_sizes[sz]); + } + const uint64_t sc_end = rte_rdtsc(); + + const uint64_t eth_start = rte_rdtsc_precise(); + rte_compiler_barrier(); + for (i = 0; i < iterations; i++) { + rte_eth_tx_burst(ring_ethdev_port, 0, burst, bulk_sizes[sz]); + rte_eth_rx_burst(ring_ethdev_port, 0, burst, bulk_sizes[sz]); + } + const uint64_t eth_end = rte_rdtsc_precise(); + rte_compiler_barrier(); + + double sc_avg = ((double)(sc_end-sc_start) / + (iterations * bulk_sizes[sz])); + double eth_avg = ((double)(eth_end-eth_start) / + (iterations * bulk_sizes[sz])); + + printf("ring bulk enq/deq (size: %u) : %.1F\n", bulk_sizes[sz], + sc_avg); + printf("ethdev bulk enq/deq (size:%u): %.1F\n", bulk_sizes[sz], + eth_avg); + + printf("\n"); + } +} + +static int +test_ring_pmd_perf(void) +{ + r = rte_ring_create(RING_NAME, RING_SIZE, rte_socket_id(), + RING_F_SP_ENQ|RING_F_SC_DEQ); + if (r == NULL && (r = rte_ring_lookup(RING_NAME)) == NULL) + return -1; + + ring_ethdev_port = rte_eth_from_ring(r); + + printf("\n### Testing const single element enq/deq ###\n"); + test_single_enqueue_dequeue(); + + printf("\n### Testing empty dequeue ###\n"); + test_empty_dequeue(); + + printf("\n### Testing using a single lcore ###\n"); + test_bulk_enqueue_dequeue(); + + return 0; +} + +static struct test_command ring_pmd_perf_cmd = { + .command = "ring_pmd_perf_autotest", + .callback = test_ring_pmd_perf, +}; +REGISTER_TEST_COMMAND(ring_pmd_perf_cmd); -- 2.4.3