ea764afadd
Add a performance test for ring pmd, comparing performance of the pmd compared to the basic rte_ring APIs. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com> Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
189 lines
5.9 KiB
C
189 lines
5.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2015 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <inttypes.h>
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#include <rte_ring.h>
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#include <rte_cycles.h>
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#include <rte_launch.h>
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#include <rte_ethdev.h>
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#include <rte_eth_ring.h>
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#include "test.h"
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#define RING_NAME "RING_PERF"
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#define RING_SIZE 4096
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#define MAX_BURST 32
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/*
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* the sizes to enqueue and dequeue in testing
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* (marked volatile so they won't be seen as compile-time constants)
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*/
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static const volatile unsigned bulk_sizes[] = { 1, 8, 32 };
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/* The ring structure used for tests */
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static struct rte_ring *r;
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static uint8_t ring_ethdev_port;
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/* Get cycle counts for dequeuing from an empty ring. Should be 2 or 3 cycles */
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static void
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test_empty_dequeue(void)
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{
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const unsigned iter_shift = 26;
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const unsigned iterations = 1 << iter_shift;
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unsigned i = 0;
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void *burst[MAX_BURST];
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const uint64_t sc_start = rte_rdtsc();
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for (i = 0; i < iterations; i++)
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rte_ring_sc_dequeue_bulk(r, burst, bulk_sizes[0]);
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const uint64_t sc_end = rte_rdtsc();
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const uint64_t eth_start = rte_rdtsc();
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for (i = 0; i < iterations; i++)
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rte_eth_rx_burst(ring_ethdev_port, 0, (void *)burst,
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bulk_sizes[0]);
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const uint64_t eth_end = rte_rdtsc();
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printf("Ring empty dequeue : %.1F\n",
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(double)(sc_end - sc_start) / iterations);
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printf("Ethdev empty dequeue: %.1F\n",
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(double)(eth_end - eth_start) / iterations);
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}
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/*
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* Test function that determines how long an enqueue + dequeue of a single item
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* takes on a single lcore. Result is for comparison with the bulk enq+deq.
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*/
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static void
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test_single_enqueue_dequeue(void)
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{
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const unsigned iter_shift = 24;
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const unsigned iterations = 1 << iter_shift;
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unsigned i = 0;
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void *burst = NULL;
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struct rte_mbuf *mburst[1] = { NULL };
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const uint64_t sc_start = rte_rdtsc_precise();
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rte_compiler_barrier();
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for (i = 0; i < iterations; i++) {
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rte_ring_enqueue_bulk(r, &burst, 1);
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rte_ring_dequeue_bulk(r, &burst, 1);
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}
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const uint64_t sc_end = rte_rdtsc_precise();
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rte_compiler_barrier();
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const uint64_t eth_start = rte_rdtsc_precise();
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rte_compiler_barrier();
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for (i = 0; i < iterations; i++) {
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rte_eth_tx_burst(ring_ethdev_port, 0, mburst, 1);
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rte_eth_rx_burst(ring_ethdev_port, 0, mburst, 1);
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}
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const uint64_t eth_end = rte_rdtsc_precise();
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rte_compiler_barrier();
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printf("Ring single enq/dequeue : %"PRIu64"\n",
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(sc_end-sc_start) >> iter_shift);
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printf("Ethdev single enq/dequeue: %"PRIu64"\n",
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(eth_end-eth_start) >> iter_shift);
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}
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/* Times enqueue and dequeue on a single lcore */
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static void
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test_bulk_enqueue_dequeue(void)
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{
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const unsigned iter_shift = 23;
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const unsigned iterations = 1 << iter_shift;
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unsigned sz, i = 0;
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struct rte_mbuf *burst[MAX_BURST] = {0};
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for (sz = 0; sz < sizeof(bulk_sizes)/sizeof(bulk_sizes[0]); sz++) {
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const uint64_t sc_start = rte_rdtsc();
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for (i = 0; i < iterations; i++) {
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rte_ring_sp_enqueue_bulk(r, (void *)burst, bulk_sizes[sz]);
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rte_ring_sc_dequeue_bulk(r, (void *)burst, bulk_sizes[sz]);
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}
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const uint64_t sc_end = rte_rdtsc();
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const uint64_t eth_start = rte_rdtsc_precise();
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rte_compiler_barrier();
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for (i = 0; i < iterations; i++) {
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rte_eth_tx_burst(ring_ethdev_port, 0, burst, bulk_sizes[sz]);
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rte_eth_rx_burst(ring_ethdev_port, 0, burst, bulk_sizes[sz]);
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}
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const uint64_t eth_end = rte_rdtsc_precise();
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rte_compiler_barrier();
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double sc_avg = ((double)(sc_end-sc_start) /
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(iterations * bulk_sizes[sz]));
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double eth_avg = ((double)(eth_end-eth_start) /
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(iterations * bulk_sizes[sz]));
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printf("ring bulk enq/deq (size: %u) : %.1F\n", bulk_sizes[sz],
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sc_avg);
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printf("ethdev bulk enq/deq (size:%u): %.1F\n", bulk_sizes[sz],
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eth_avg);
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printf("\n");
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}
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}
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static int
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test_ring_pmd_perf(void)
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{
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r = rte_ring_create(RING_NAME, RING_SIZE, rte_socket_id(),
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RING_F_SP_ENQ|RING_F_SC_DEQ);
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if (r == NULL && (r = rte_ring_lookup(RING_NAME)) == NULL)
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return -1;
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ring_ethdev_port = rte_eth_from_ring(r);
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printf("\n### Testing const single element enq/deq ###\n");
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test_single_enqueue_dequeue();
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printf("\n### Testing empty dequeue ###\n");
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test_empty_dequeue();
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printf("\n### Testing using a single lcore ###\n");
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test_bulk_enqueue_dequeue();
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return 0;
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}
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static struct test_command ring_pmd_perf_cmd = {
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.command = "ring_pmd_perf_autotest",
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.callback = test_ring_pmd_perf,
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};
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REGISTER_TEST_COMMAND(ring_pmd_perf_cmd);
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