1 files changed, 249 insertions, 0 deletions
diff --git a/app/test/test_lpm_perf.c b/app/test/test_lpm_perf.c
new file mode 100644
index 00000000..41da811c
--- /dev/null
+++ b/app/test/test_lpm_perf.c
@@ -0,0 +1,249 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 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 <stdint.h>
+#include <stdlib.h>
+
+#include <rte_cycles.h>
+#include <rte_random.h>
+#include <rte_branch_prediction.h>
+#include <rte_lpm.h>
+
+#include "test.h"
+#include "test_lpm_routes.h"
+#include "test_xmmt_ops.h"
+
+#define TEST_LPM_ASSERT(cond) do {                                            \
+	if (!(cond)) {                                                        \
+		printf("Error at line %d: \n", __LINE__);                     \
+		return -1;                                                    \
+	}                                                                     \
+} while(0)
+
+#define ITERATIONS (1 << 10)
+#define BATCH_SIZE (1 << 12)
+#define BULK_SIZE 32
+
+static void
+print_route_distribution(const struct route_rule *table, uint32_t n)
+{
+	unsigned i, j;
+
+	printf("Route distribution per prefix width: \n");
+	printf("DEPTH    QUANTITY (PERCENT)\n");
+	printf("--------------------------- \n");
+
+	/* Count depths. */
+	for (i = 1; i <= 32; i++) {
+		unsigned depth_counter = 0;
+		double percent_hits;
+
+		for (j = 0; j < n; j++)
+			if (table[j].depth == (uint8_t) i)
+				depth_counter++;
+
+		percent_hits = ((double)depth_counter)/((double)n) * 100;
+		printf("%.2u%15u (%.2f)\n", i, depth_counter, percent_hits);
+	}
+	printf("\n");
+}
+
+static int
+test_lpm_perf(void)
+{
+	struct rte_lpm *lpm = NULL;
+	struct rte_lpm_config config;
+
+	config.max_rules = 1000000;
+	config.number_tbl8s = 256;
+	config.flags = 0;
+	uint64_t begin, total_time, lpm_used_entries = 0;
+	unsigned i, j;
+	uint32_t next_hop_add = 0xAA, next_hop_return = 0;
+	int status = 0;
+	uint64_t cache_line_counter = 0;
+	int64_t count = 0;
+
+	rte_srand(rte_rdtsc());
+
+	printf("No. routes = %u\n", (unsigned) NUM_ROUTE_ENTRIES);
+
+	print_route_distribution(large_route_table, (uint32_t) NUM_ROUTE_ENTRIES);
+
+	lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
+	TEST_LPM_ASSERT(lpm != NULL);
+
+	/* Measue add. */
+	begin = rte_rdtsc();
+
+	for (i = 0; i < NUM_ROUTE_ENTRIES; i++) {
+		if (rte_lpm_add(lpm, large_route_table[i].ip,
+				large_route_table[i].depth, next_hop_add) == 0)
+			status++;
+	}
+	/* End Timer. */
+	total_time = rte_rdtsc() - begin;
+
+	printf("Unique added entries = %d\n", status);
+	/* Obtain add statistics. */
+	for (i = 0; i < RTE_LPM_TBL24_NUM_ENTRIES; i++) {
+		if (lpm->tbl24[i].valid)
+			lpm_used_entries++;
+
+		if (i % 32 == 0) {
+			if ((uint64_t)count < lpm_used_entries) {
+				cache_line_counter++;
+				count = lpm_used_entries;
+			}
+		}
+	}
+
+	printf("Used table 24 entries = %u (%g%%)\n",
+			(unsigned) lpm_used_entries,
+			(lpm_used_entries * 100.0) / RTE_LPM_TBL24_NUM_ENTRIES);
+	printf("64 byte Cache entries used = %u (%u bytes)\n",
+			(unsigned) cache_line_counter, (unsigned) cache_line_counter * 64);
+
+	printf("Average LPM Add: %g cycles\n",
+			(double)total_time / NUM_ROUTE_ENTRIES);
+
+	/* Measure single Lookup */
+	total_time = 0;
+	count = 0;
+
+	for (i = 0; i < ITERATIONS; i++) {
+		static uint32_t ip_batch[BATCH_SIZE];
+
+		for (j = 0; j < BATCH_SIZE; j++)
+			ip_batch[j] = rte_rand();
+
+		/* Lookup per batch */
+		begin = rte_rdtsc();
+
+		for (j = 0; j < BATCH_SIZE; j++) {
+			if (rte_lpm_lookup(lpm, ip_batch[j], &next_hop_return) != 0)
+				count++;
+		}
+
+		total_time += rte_rdtsc() - begin;
+
+	}
+	printf("Average LPM Lookup: %.1f cycles (fails = %.1f%%)\n",
+			(double)total_time / ((double)ITERATIONS * BATCH_SIZE),
+			(count * 100.0) / (double)(ITERATIONS * BATCH_SIZE));
+
+	/* Measure bulk Lookup */
+	total_time = 0;
+	count = 0;
+	for (i = 0; i < ITERATIONS; i++) {
+		static uint32_t ip_batch[BATCH_SIZE];
+		uint32_t next_hops[BULK_SIZE];
+
+		/* Create array of random IP addresses */
+		for (j = 0; j < BATCH_SIZE; j++)
+			ip_batch[j] = rte_rand();
+
+		/* Lookup per batch */
+		begin = rte_rdtsc();
+		for (j = 0; j < BATCH_SIZE; j += BULK_SIZE) {
+			unsigned k;
+			rte_lpm_lookup_bulk(lpm, &ip_batch[j], next_hops, BULK_SIZE);
+			for (k = 0; k < BULK_SIZE; k++)
+				if (unlikely(!(next_hops[k] & RTE_LPM_LOOKUP_SUCCESS)))
+					count++;
+		}
+
+		total_time += rte_rdtsc() - begin;
+	}
+	printf("BULK LPM Lookup: %.1f cycles (fails = %.1f%%)\n",
+			(double)total_time / ((double)ITERATIONS * BATCH_SIZE),
+			(count * 100.0) / (double)(ITERATIONS * BATCH_SIZE));
+
+	/* Measure LookupX4 */
+	total_time = 0;
+	count = 0;
+	for (i = 0; i < ITERATIONS; i++) {
+		static uint32_t ip_batch[BATCH_SIZE];
+		uint32_t next_hops[4];
+
+		/* Create array of random IP addresses */
+		for (j = 0; j < BATCH_SIZE; j++)
+			ip_batch[j] = rte_rand();
+
+		/* Lookup per batch */
+		begin = rte_rdtsc();
+		for (j = 0; j < BATCH_SIZE; j += RTE_DIM(next_hops)) {
+			unsigned k;
+			xmm_t ipx4;
+
+			ipx4 = vect_loadu_sil128((xmm_t *)(ip_batch + j));
+			ipx4 = *(xmm_t *)(ip_batch + j);
+			rte_lpm_lookupx4(lpm, ipx4, next_hops, UINT32_MAX);
+			for (k = 0; k < RTE_DIM(next_hops); k++)
+				if (unlikely(next_hops[k] == UINT32_MAX))
+					count++;
+		}
+
+		total_time += rte_rdtsc() - begin;
+	}
+	printf("LPM LookupX4: %.1f cycles (fails = %.1f%%)\n",
+			(double)total_time / ((double)ITERATIONS * BATCH_SIZE),
+			(count * 100.0) / (double)(ITERATIONS * BATCH_SIZE));
+
+	/* Delete */
+	status = 0;
+	begin = rte_rdtsc();
+
+	for (i = 0; i < NUM_ROUTE_ENTRIES; i++) {
+		/* rte_lpm_delete(lpm, ip, depth) */
+		status += rte_lpm_delete(lpm, large_route_table[i].ip,
+				large_route_table[i].depth);
+	}
+
+	total_time += rte_rdtsc() - begin;
+
+	printf("Average LPM Delete: %g cycles\n",
+			(double)total_time / NUM_ROUTE_ENTRIES);
+
+	rte_lpm_delete_all(lpm);
+	rte_lpm_free(lpm);
+
+	return 0;
+}
+
+static struct test_command lpm_perf_cmd = {
+	.command = "lpm_perf_autotest",
+	.callback = test_lpm_perf,
+};
+REGISTER_TEST_COMMAND(lpm_perf_cmd);