+++ /dev/null
-/*-
- * 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 <stdio.h>
-#include <inttypes.h>
-#include <rte_ring.h>
-#include <rte_cycles.h>
-#include <rte_launch.h>
-#include <rte_ethdev.h>
-#include <rte_eth_ring.h>
-
-#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;
-}
-
-REGISTER_TEST_COMMAND(ring_pmd_perf_autotest, test_ring_pmd_perf);
Code Review / deb_dpdk.git / blobdiff