--- /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;
+}
+
+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);
git.droids-corp.org / dpdk.git / commitdiff