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Diffstat (limited to 'app/test/test_distributor_perf.c')
| -rw-r--r-- | app/test/test_distributor_perf.c | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/app/test/test_distributor_perf.c b/app/test/test_distributor_perf.c deleted file mode 100644 index 7947fe9b..00000000 --- a/app/test/test_distributor_perf.c +++ /dev/null @@ -1,260 +0,0 @@ -/*- - * 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 "test.h" - -#include <unistd.h> -#include <string.h> -#include <rte_mempool.h> -#include <rte_cycles.h> -#include <rte_common.h> -#include <rte_mbuf.h> -#include <rte_distributor.h> - -#define ITER_POWER 20 /* log 2 of how many iterations we do when timing. */ -#define BURST 32 -#define BIG_BATCH 1024 - -/* static vars - zero initialized by default */ -static volatile int quit; -static volatile unsigned worker_idx; - -struct worker_stats { - volatile unsigned handled_packets; -} __rte_cache_aligned; -struct worker_stats worker_stats[RTE_MAX_LCORE]; - -/* worker thread used for testing the time to do a round-trip of a cache - * line between two cores and back again - */ -static void -flip_bit(volatile uint64_t *arg) -{ - uint64_t old_val = 0; - while (old_val != 2) { - while (!*arg) - rte_pause(); - old_val = *arg; - *arg = 0; - } -} - -/* test case to time the number of cycles to round-trip a cache line between - * two cores and back again. - */ -static void -time_cache_line_switch(void) -{ - /* allocate a full cache line for data, we use only first byte of it */ - uint64_t data[RTE_CACHE_LINE_SIZE*3 / sizeof(uint64_t)]; - - unsigned i, slaveid = rte_get_next_lcore(rte_lcore_id(), 0, 0); - volatile uint64_t *pdata = &data[0]; - *pdata = 1; - rte_eal_remote_launch((lcore_function_t *)flip_bit, &data[0], slaveid); - while (*pdata) - rte_pause(); - - const uint64_t start_time = rte_rdtsc(); - for (i = 0; i < (1 << ITER_POWER); i++) { - while (*pdata) - rte_pause(); - *pdata = 1; - } - const uint64_t end_time = rte_rdtsc(); - - while (*pdata) - rte_pause(); - *pdata = 2; - rte_eal_wait_lcore(slaveid); - printf("==== Cache line switch test ===\n"); - printf("Time for %u iterations = %"PRIu64" ticks\n", (1<<ITER_POWER), - end_time-start_time); - printf("Ticks per iteration = %"PRIu64"\n\n", - (end_time-start_time) >> ITER_POWER); -} - -/* returns the total count of the number of packets handled by the worker - * functions given below. - */ -static unsigned -total_packet_count(void) -{ - unsigned i, count = 0; - for (i = 0; i < worker_idx; i++) - count += worker_stats[i].handled_packets; - return count; -} - -/* resets the packet counts for a new test */ -static void -clear_packet_count(void) -{ - memset(&worker_stats, 0, sizeof(worker_stats)); -} - -/* this is the basic worker function for performance tests. - * it does nothing but return packets and count them. - */ -static int -handle_work(void *arg) -{ - struct rte_mbuf *pkt = NULL; - struct rte_distributor *d = arg; - unsigned count = 0; - unsigned id = __sync_fetch_and_add(&worker_idx, 1); - - pkt = rte_distributor_get_pkt(d, id, NULL); - while (!quit) { - worker_stats[id].handled_packets++, count++; - pkt = rte_distributor_get_pkt(d, id, pkt); - } - worker_stats[id].handled_packets++, count++; - rte_distributor_return_pkt(d, id, pkt); - return 0; -} - -/* this basic performance test just repeatedly sends in 32 packets at a time - * to the distributor and verifies at the end that we got them all in the worker - * threads and finally how long per packet the processing took. - */ -static inline int -perf_test(struct rte_distributor *d, struct rte_mempool *p) -{ - unsigned i; - uint64_t start, end; - struct rte_mbuf *bufs[BURST]; - - clear_packet_count(); - if (rte_mempool_get_bulk(p, (void *)bufs, BURST) != 0) { - printf("Error getting mbufs from pool\n"); - return -1; - } - /* ensure we have different hash value for each pkt */ - for (i = 0; i < BURST; i++) - bufs[i]->hash.usr = i; - - start = rte_rdtsc(); - for (i = 0; i < (1<<ITER_POWER); i++) - rte_distributor_process(d, bufs, BURST); - end = rte_rdtsc(); - - do { - usleep(100); - rte_distributor_process(d, NULL, 0); - } while (total_packet_count() < (BURST << ITER_POWER)); - - printf("=== Performance test of distributor ===\n"); - printf("Time per burst: %"PRIu64"\n", (end - start) >> ITER_POWER); - printf("Time per packet: %"PRIu64"\n\n", - ((end - start) >> ITER_POWER)/BURST); - rte_mempool_put_bulk(p, (void *)bufs, BURST); - - for (i = 0; i < rte_lcore_count() - 1; i++) - printf("Worker %u handled %u packets\n", i, - worker_stats[i].handled_packets); - printf("Total packets: %u (%x)\n", total_packet_count(), - total_packet_count()); - printf("=== Perf test done ===\n\n"); - - return 0; -} - -/* Useful function which ensures that all worker functions terminate */ -static void -quit_workers(struct rte_distributor *d, struct rte_mempool *p) -{ - const unsigned num_workers = rte_lcore_count() - 1; - unsigned i; - struct rte_mbuf *bufs[RTE_MAX_LCORE]; - rte_mempool_get_bulk(p, (void *)bufs, num_workers); - - quit = 1; - for (i = 0; i < num_workers; i++) - bufs[i]->hash.usr = i << 1; - rte_distributor_process(d, bufs, num_workers); - - rte_mempool_put_bulk(p, (void *)bufs, num_workers); - - rte_distributor_process(d, NULL, 0); - rte_eal_mp_wait_lcore(); - quit = 0; - worker_idx = 0; -} - -static int -test_distributor_perf(void) -{ - static struct rte_distributor *d; - static struct rte_mempool *p; - - if (rte_lcore_count() < 2) { - printf("ERROR: not enough cores to test distributor\n"); - return -1; - } - - /* first time how long it takes to round-trip a cache line */ - time_cache_line_switch(); - - if (d == NULL) { - d = rte_distributor_create("Test_perf", rte_socket_id(), - rte_lcore_count() - 1); - if (d == NULL) { - printf("Error creating distributor\n"); - return -1; - } - } else { - rte_distributor_flush(d); - rte_distributor_clear_returns(d); - } - - const unsigned nb_bufs = (511 * rte_lcore_count()) < BIG_BATCH ? - (BIG_BATCH * 2) - 1 : (511 * rte_lcore_count()); - if (p == NULL) { - p = rte_pktmbuf_pool_create("DPT_MBUF_POOL", nb_bufs, BURST, - 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); - if (p == NULL) { - printf("Error creating mempool\n"); - return -1; - } - } - - rte_eal_mp_remote_launch(handle_work, d, SKIP_MASTER); - if (perf_test(d, p) < 0) - return -1; - quit_workers(d, p); - - return 0; -} - -REGISTER_TEST_COMMAND(distributor_perf_autotest, test_distributor_perf); |