From: Dharmik Thakkar <Dharmik.Thakkar@arm.com>
To: "Medvedkin, Vladimir" <vladimir.medvedkin@intel.com>
Cc: Bruce Richardson <bruce.richardson@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH 4/4] test/lpm: avoid code duplication in rcu qsbr perf
Date: Mon, 2 Nov 2020 22:11:57 +0000 [thread overview]
Message-ID: <374AEEB6-ADF8-4960-BB64-CBD6046F5379@arm.com> (raw)
In-Reply-To: <60004746-5cdb-9f03-5392-ce43793280b6@intel.com>
> On Nov 2, 2020, at 11:17 AM, Medvedkin, Vladimir <vladimir.medvedkin@intel.com> wrote:
>
> Hi Dharmik,
>
> Thanks for the patches, see comments inlined
>
>
> On 29/10/2020 15:36, Dharmik Thakkar wrote:
>> Avoid code duplication by combining single and multi threaded tests
>> Signed-off-by: Dharmik Thakkar<dharmik.thakkar@arm.com>
>> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
>> ---
>> app/test/test_lpm_perf.c | 338 +++++++++------------------------------
>> 1 file changed, 73 insertions(+), 265 deletions(-)
>> diff --git a/app/test/test_lpm_perf.c b/app/test/test_lpm_perf.c
>> index 4f15db4f85ee..08312023b661 100644
>> --- a/app/test/test_lpm_perf.c
>> +++ b/app/test/test_lpm_perf.c
>> @@ -430,11 +430,16 @@ test_lpm_rcu_qsbr_writer(void *arg)
>> {
>> unsigned int i, j, si, ei;
>> uint64_t begin, total_cycles;
>> - uint8_t core_id = (uint8_t)((uintptr_t)arg);
>> + uint8_t writer_id = (uint8_t)((uintptr_t)arg);
>> uint32_t next_hop_add = 0xAA;
>> - /* 2 writer threads are used */
>> - if (core_id % 2 == 0) {
>> + /* Single writer (writer_id = 1) */
>> + if (writer_id == 1) {
>
> Probably it would be better to use enum here instead of 1/2/3?
>
Yes, I will update the patch.
>> + si = 0;
>> + ei = NUM_LDEPTH_ROUTE_ENTRIES;
>> + }
>> + /* 2 Writers (writer_id = 2/3)*/
>> + else if (writer_id == 2) {
>> si = 0;
>> ei = NUM_LDEPTH_ROUTE_ENTRIES / 2;
>> } else {
>> @@ -482,16 +487,17 @@ test_lpm_rcu_qsbr_writer(void *arg)
>> /*
>> * Functional test:
>> - * 2 writers, rest are readers
>> + * 1/2 writers, rest are readers
>> */
>> static int
>> -test_lpm_rcu_perf_multi_writer(void)
>> +test_lpm_rcu_perf_multi_writer(uint8_t use_rcu)
>> {
>> struct rte_lpm_config config;
>> size_t sz;
>> - unsigned int i;
>> + unsigned int i, j;
>> uint16_t core_id;
>> struct rte_lpm_rcu_config rcu_cfg = {0};
>> + int (*reader_f)(void *arg) = NULL;
>> if (rte_lcore_count() < 3) {
>> printf("Not enough cores for lpm_rcu_perf_autotest, expecting at least 3\n");
>> @@ -504,273 +510,76 @@ test_lpm_rcu_perf_multi_writer(void)
>> num_cores++;
>> }
>> - printf("\nPerf test: 2 writers, %d readers, RCU integration enabled\n",
>> - num_cores - 2);
>> -
>> - /* Create LPM table */
>> - config.max_rules = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.number_tbl8s = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.flags = 0;
>> - lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
>> - TEST_LPM_ASSERT(lpm != NULL);
>> -
>> - /* Init RCU variable */
>> - sz = rte_rcu_qsbr_get_memsize(num_cores);
>> - rv = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
>> - RTE_CACHE_LINE_SIZE);
>> - rte_rcu_qsbr_init(rv, num_cores);
>> -
>> - rcu_cfg.v = rv;
>> - /* Assign the RCU variable to LPM */
>> - if (rte_lpm_rcu_qsbr_add(lpm, &rcu_cfg) != 0) {
>> - printf("RCU variable assignment failed\n");
>> - goto error;
>> - }
>> -
>> - writer_done = 0;
>> - __atomic_store_n(&gwrite_cycles, 0, __ATOMIC_RELAXED);
>> -
>> - __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
>> -
>> - /* Launch reader threads */
>> - for (i = 2; i < num_cores; i++)
>> - rte_eal_remote_launch(test_lpm_rcu_qsbr_reader, NULL,
>> - enabled_core_ids[i]);
>> -
>> - /* Launch writer threads */
>> - for (i = 0; i < 2; i++)
>> - rte_eal_remote_launch(test_lpm_rcu_qsbr_writer,
>> - (void *)(uintptr_t)i,
>> - enabled_core_ids[i]);
>> -
>> - /* Wait for writer threads */
>> - for (i = 0; i < 2; i++)
>> - if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0)
>> - goto error;
>> -
>> - printf("Total LPM Adds: %d\n", TOTAL_WRITES);
>> - printf("Total LPM Deletes: %d\n", TOTAL_WRITES);
>> - printf("Average LPM Add/Del: %"PRIu64" cycles\n",
>> - __atomic_load_n(&gwrite_cycles, __ATOMIC_RELAXED) / TOTAL_WRITES
>> - );
>> -
>> - writer_done = 1;
>> - /* Wait until all readers have exited */
>> - for (i = 2; i < num_cores; i++)
>> - rte_eal_wait_lcore(enabled_core_ids[i]);
>> -
>> - rte_lpm_free(lpm);
>> - rte_free(rv);
>> - lpm = NULL;
>> - rv = NULL;
>> -
>> - /* Test without RCU integration */
>> - printf("\nPerf test: 2 writers, %d readers, RCU integration disabled\n",
>> - num_cores - 2);
>> -
>> - /* Create LPM table */
>> - config.max_rules = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.number_tbl8s = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.flags = 0;
>> - lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
>> - TEST_LPM_ASSERT(lpm != NULL);
>> -
>> - writer_done = 0;
>> - __atomic_store_n(&gwrite_cycles, 0, __ATOMIC_RELAXED);
>> - __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
>> -
>> - /* Launch reader threads */
>> - for (i = 2; i < num_cores; i++)
>> - rte_eal_remote_launch(test_lpm_reader, NULL,
>> - enabled_core_ids[i]);
>> -
>> - /* Launch writer threads */
>> - for (i = 0; i < 2; i++)
>> - rte_eal_remote_launch(test_lpm_rcu_qsbr_writer,
>> - (void *)(uintptr_t)i,
>> - enabled_core_ids[i]);
>> -
>> - /* Wait for writer threads */
>> - for (i = 0; i < 2; i++)
>> - if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0)
>> - goto error;
>> -
>> - printf("Total LPM Adds: %d\n", TOTAL_WRITES);
>> - printf("Total LPM Deletes: %d\n", TOTAL_WRITES);
>> - printf("Average LPM Add/Del: %"PRIu64" cycles\n",
>> - __atomic_load_n(&gwrite_cycles, __ATOMIC_RELAXED)
>> - / TOTAL_WRITES);
>> -
>> - writer_done = 1;
>> - /* Wait until all readers have exited */
>> - for (i = 2; i < num_cores; i++)
>> - rte_eal_wait_lcore(enabled_core_ids[i]);
>> -
>> - rte_lpm_free(lpm);
>> -
>> - return 0;
>> -
>> -error:
>> - writer_done = 1;
>> - /* Wait until all readers have exited */
>> - rte_eal_mp_wait_lcore();
>> -
>> - rte_lpm_free(lpm);
>> - rte_free(rv);
>> -
>> - return -1;
>> -}
>> -
>> -/*
>> - * Functional test:
>> - * Single writer, rest are readers
>> - */
>> -static int
>> -test_lpm_rcu_perf(void)
>> -{
>> - struct rte_lpm_config config;
>> - uint64_t begin, total_cycles;
>> - size_t sz;
>> - unsigned int i, j;
>> - uint16_t core_id;
>> - uint32_t next_hop_add = 0xAA;
>> - struct rte_lpm_rcu_config rcu_cfg = {0};
>> -
>> - if (rte_lcore_count() < 2) {
>> - printf("Not enough cores for lpm_rcu_perf_autotest, expecting at least 2\n");
>> - return TEST_SKIPPED;
>> - }
>> -
>> - num_cores = 0;
>> - RTE_LCORE_FOREACH_WORKER(core_id) {
>> - enabled_core_ids[num_cores] = core_id;
>> - num_cores++;
>> - }
>> -
>> - printf("\nPerf test: 1 writer, %d readers, RCU integration enabled\n",
>> - num_cores);
>> -
>> - /* Create LPM table */
>> - config.max_rules = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.number_tbl8s = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.flags = 0;
>> - lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
>> - TEST_LPM_ASSERT(lpm != NULL);
>> -
>> - /* Init RCU variable */
>> - sz = rte_rcu_qsbr_get_memsize(num_cores);
>> - rv = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
>> - RTE_CACHE_LINE_SIZE);
>> - rte_rcu_qsbr_init(rv, num_cores);
>> -
>> - rcu_cfg.v = rv;
>> - /* Assign the RCU variable to LPM */
>> - if (rte_lpm_rcu_qsbr_add(lpm, &rcu_cfg) != 0) {
>> - printf("RCU variable assignment failed\n");
>> - goto error;
>> - }
>> -
>> - writer_done = 0;
>> - __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
>> -
>> - /* Launch reader threads */
>> - for (i = 0; i < num_cores; i++)
>> - rte_eal_remote_launch(test_lpm_rcu_qsbr_reader, NULL,
>> - enabled_core_ids[i]);
>> -
>> - /* Measure add/delete. */
>> - begin = rte_rdtsc_precise();
>> - for (i = 0; i < RCU_ITERATIONS; i++) {
>> - /* Add all the entries */
>> - for (j = 0; j < NUM_LDEPTH_ROUTE_ENTRIES; j++)
>> - if (rte_lpm_add(lpm, large_ldepth_route_table[j].ip,
>> - large_ldepth_route_table[j].depth,
>> - next_hop_add) != 0) {
>> - printf("Failed to add iteration %d, route# %d\n",
>> - i, j);
>> + for (j = 1; j < 3; j++) {
>> + if (use_rcu)
>> + printf("\nPerf test: %d writer(s), %d reader(s),"
>> + " RCU integration enabled\n", j, num_cores - j);
>> + else
>> + printf("\nPerf test: %d writer(s), %d reader(s),"
>> + " RCU integration disabled\n", j, num_cores - j);
>> +
>> + /* Create LPM table */
>> + config.max_rules = NUM_LDEPTH_ROUTE_ENTRIES;
>> + config.number_tbl8s = NUM_LDEPTH_ROUTE_ENTRIES;
>> + config.flags = 0;
>> + lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
>> + TEST_LPM_ASSERT(lpm != NULL);
>> +
>> + /* Init RCU variable */
>> + if (use_rcu) {
>> + sz = rte_rcu_qsbr_get_memsize(num_cores);
>> + rv = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
>> + RTE_CACHE_LINE_SIZE);
>> + rte_rcu_qsbr_init(rv, num_cores);
>> +
>> + rcu_cfg.v = rv;
>> + /* Assign the RCU variable to LPM */
>> + if (rte_lpm_rcu_qsbr_add(lpm, &rcu_cfg) != 0) {
>> + printf("RCU variable assignment failed\n");
>> goto error;
>> }
>> - /* Delete all the entries */
>> - for (j = 0; j < NUM_LDEPTH_ROUTE_ENTRIES; j++)
>> - if (rte_lpm_delete(lpm, large_ldepth_route_table[j].ip,
>> - large_ldepth_route_table[j].depth) != 0) {
>> - printf("Failed to delete iteration %d, route# %d\n",
>> - i, j);
>> - goto error;
>> - }
>> - }
>> - total_cycles = rte_rdtsc_precise() - begin;
>> + reader_f = test_lpm_rcu_qsbr_reader;
>> + } else
>> + reader_f = test_lpm_reader;
>> - printf("Total LPM Adds: %d\n", TOTAL_WRITES);
>> - printf("Total LPM Deletes: %d\n", TOTAL_WRITES);
>> - printf("Average LPM Add/Del: %g cycles\n",
>> - (double)total_cycles / TOTAL_WRITES);
>> + writer_done = 0;
>> + __atomic_store_n(&gwrite_cycles, 0, __ATOMIC_RELAXED);
>> - writer_done = 1;
>> - /* Wait until all readers have exited */
>> - for (i = 0; i < num_cores; i++)
>> - if (rte_eal_wait_lcore(enabled_core_ids[i]);
>> + __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
>> - rte_lpm_free(lpm);
>> - rte_free(rv);
>> - lpm = NULL;
>> - rv = NULL;
>> + /* Launch reader threads */
>> + for (i = j; i < num_cores; i++)
>> + rte_eal_remote_launch(reader_f, NULL,
>> + enabled_core_ids[i]);
>> - /* Test without RCU integration */
>> - printf("\nPerf test: 1 writer, %d readers, RCU integration disabled\n",
>> - num_cores);
>> + /* Launch writer threads */
>> + for (i = 0; i < j; i++)
>> + rte_eal_remote_launch(test_lpm_rcu_qsbr_writer,
>
> So now even single writer will acquire a lock for every _add/_delete operation. I don't think it is necessary.
Yes, agreed it is not necessary. I wanted to avoid additional if () statement, but I can add it in the new version.
>
>> + (void *)(uintptr_t)(i + j),
>> + enabled_core_ids[i]);
>> - /* Create LPM table */
>> - config.max_rules = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.number_tbl8s = NUM_LDEPTH_ROUTE_ENTRIES;
>> - config.flags = 0;
>> - lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
>> - TEST_LPM_ASSERT(lpm != NULL);
>> -
>> - writer_done = 0;
>> - __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
>> -
>> - /* Launch reader threads */
>> - for (i = 0; i < num_cores; i++)
>> - rte_eal_remote_launch(test_lpm_reader, NULL,
>> - enabled_core_ids[i]);
>> -
>> - /* Measure add/delete. */
>> - begin = rte_rdtsc_precise();
>> - for (i = 0; i < RCU_ITERATIONS; i++) {
>> - /* Add all the entries */
>> - for (j = 0; j < NUM_LDEPTH_ROUTE_ENTRIES; j++)
>> - if (rte_lpm_add(lpm, large_ldepth_route_table[j].ip,
>> - large_ldepth_route_table[j].depth,
>> - next_hop_add) != 0) {
>> - printf("Failed to add iteration %d, route# %d\n",
>> - i, j);
>> + /* Wait for writer threads */
>> + for (i = 0; i < j; i++)
>> + if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0)
>> goto error;
>> - }
>> - /* Delete all the entries */
>> - for (j = 0; j < NUM_LDEPTH_ROUTE_ENTRIES; j++)
>> - if (rte_lpm_delete(lpm, large_ldepth_route_table[j].ip,
>> - large_ldepth_route_table[j].depth) != 0) {
>> - printf("Failed to delete iteration %d, route# %d\n",
>> - i, j);
>> - goto error;
>> - }
>> + printf("Total LPM Adds: %d\n", TOTAL_WRITES);
>> + printf("Total LPM Deletes: %d\n", TOTAL_WRITES);
>> + printf("Average LPM Add/Del: %"PRIu64" cycles\n",
>> + __atomic_load_n(&gwrite_cycles, __ATOMIC_RELAXED)
>> + / TOTAL_WRITES);
>> +
>> + writer_done = 1;
>> + /* Wait until all readers have exited */
>> + for (i = j; i < num_cores; i++)
>> + rte_eal_wait_lcore(enabled_core_ids[i]);
>> +
>> + rte_lpm_free(lpm);
>> + rte_free(rv);
>> + lpm = NULL;
>> + rv = NULL;
>> }
>> - total_cycles = rte_rdtsc_precise() - begin;
>> -
>> - printf("Total LPM Adds: %d\n", TOTAL_WRITES);
>> - printf("Total LPM Deletes: %d\n", TOTAL_WRITES);
>> - printf("Average LPM Add/Del: %g cycles\n",
>> - (double)total_cycles / TOTAL_WRITES);
>> -
>> - writer_done = 1;
>> - /* Wait until all readers have exited */
>> - for (i = 0; i < num_cores; i++)
>> - rte_eal_wait_lcore(enabled_core_ids[i]);
>> -
>> - rte_lpm_free(lpm);
>> return 0;
>> @@ -946,9 +755,8 @@ test_lpm_perf(void)
>> rte_lpm_delete_all(lpm);
>> rte_lpm_free(lpm);
>> - test_lpm_rcu_perf();
>> -
>> - test_lpm_rcu_perf_multi_writer();
>> + test_lpm_rcu_perf_multi_writer(0);
>> + test_lpm_rcu_perf_multi_writer(1);
>> return 0;
>> }
>
> --
> Regards,
> Vladimir
next prev parent reply other threads:[~2020-11-02 22:12 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 15:36 [dpdk-dev] [PATCH 1/4] test/lpm: fix cycle calculation " Dharmik Thakkar
2020-10-29 15:36 ` [dpdk-dev] [PATCH 2/4] test/lpm: return error on failure " Dharmik Thakkar
2020-10-29 15:36 ` [dpdk-dev] [PATCH 3/4] test/lpm: remove error checking " Dharmik Thakkar
2020-10-29 15:36 ` [dpdk-dev] [PATCH 4/4] test/lpm: avoid code duplication " Dharmik Thakkar
2020-11-02 17:17 ` Medvedkin, Vladimir
2020-11-02 22:11 ` Dharmik Thakkar [this message]
2020-11-02 10:08 ` [dpdk-dev] [PATCH 1/4] test/lpm: fix cycle calculation " David Marchand
2020-11-02 15:11 ` Bruce Richardson
2020-11-02 16:58 ` Dharmik Thakkar
2020-11-02 17:21 ` Medvedkin, Vladimir
2020-11-02 17:33 ` Bruce Richardson
2020-11-02 23:51 ` [dpdk-dev] [PATCH v2 0/4] test/lpm: fix rcu qsbr perf test Dharmik Thakkar
2020-11-02 23:52 ` [dpdk-dev] [PATCH v2 1/4] test/lpm: fix cycle calculation in rcu qsbr perf Dharmik Thakkar
2020-11-03 1:30 ` Honnappa Nagarahalli
2020-11-02 23:52 ` [dpdk-dev] [PATCH v2 2/4] test/lpm: return error on failure " Dharmik Thakkar
2020-11-03 1:28 ` Honnappa Nagarahalli
2020-11-03 4:42 ` Dharmik Thakkar
2020-11-02 23:52 ` [dpdk-dev] [PATCH v2 3/4] test/lpm: remove error checking " Dharmik Thakkar
2020-11-03 1:21 ` Honnappa Nagarahalli
2020-11-03 4:56 ` Dharmik Thakkar
2020-11-02 23:52 ` [dpdk-dev] [PATCH v2 4/4] test/lpm: avoid code duplication " Dharmik Thakkar
2020-11-03 4:21 ` Honnappa Nagarahalli
2020-11-03 4:33 ` Dharmik Thakkar
2020-11-03 5:32 ` Honnappa Nagarahalli
2020-11-03 14:03 ` Dharmik Thakkar
2020-11-03 14:51 ` Honnappa Nagarahalli
2020-11-03 18:01 ` Medvedkin, Vladimir
2020-11-03 5:12 ` [dpdk-dev] [PATCH v3 0/4] test/lpm: fix rcu qsbr perf test Dharmik Thakkar
2020-11-03 5:12 ` [dpdk-dev] [PATCH v3 1/4] test/lpm: fix cycle calculation in rcu qsbr perf Dharmik Thakkar
2020-11-03 5:12 ` [dpdk-dev] [PATCH v3 2/4] test/lpm: return error on failure " Dharmik Thakkar
2020-11-03 5:21 ` Honnappa Nagarahalli
2020-11-03 5:12 ` [dpdk-dev] [PATCH v3 3/4] test/lpm: remove error checking " Dharmik Thakkar
2020-11-03 5:22 ` Honnappa Nagarahalli
2020-11-03 5:12 ` [dpdk-dev] [PATCH v3 4/4] test/lpm: avoid code duplication " Dharmik Thakkar
2020-11-03 22:23 ` [dpdk-dev] [PATCH v4 0/4] test/lpm: fix rcu qsbr perf test Dharmik Thakkar
2020-11-03 22:23 ` [dpdk-dev] [PATCH v4 1/4] test/lpm: fix cycle calculation in rcu qsbr perf Dharmik Thakkar
2020-11-03 22:23 ` [dpdk-dev] [PATCH v4 2/4] test/lpm: return error on failure " Dharmik Thakkar
2020-11-03 22:23 ` [dpdk-dev] [PATCH v4 3/4] test/lpm: remove error checking " Dharmik Thakkar
2020-11-03 22:23 ` [dpdk-dev] [PATCH v4 4/4] test/lpm: avoid code duplication " Dharmik Thakkar
2020-11-03 22:35 ` Honnappa Nagarahalli
2020-11-04 15:46 ` Medvedkin, Vladimir
2020-11-04 16:49 ` Dharmik Thakkar
2020-11-04 18:58 ` [dpdk-dev] [PATCH v5 0/4] test/lpm: fix rcu qsbr perf test Dharmik Thakkar
2020-11-04 18:58 ` [dpdk-dev] [PATCH v5 1/4] test/lpm: fix cycle calculation in rcu qsbr perf Dharmik Thakkar
2020-11-04 19:34 ` Medvedkin, Vladimir
2020-11-04 18:58 ` [dpdk-dev] [PATCH v5 2/4] test/lpm: return error on failure " Dharmik Thakkar
2020-11-04 19:35 ` Medvedkin, Vladimir
2020-11-04 18:58 ` [dpdk-dev] [PATCH v5 3/4] test/lpm: remove error checking " Dharmik Thakkar
2020-11-04 19:35 ` Medvedkin, Vladimir
2020-11-04 18:58 ` [dpdk-dev] [PATCH v5 4/4] test/lpm: avoid code duplication " Dharmik Thakkar
2020-11-04 19:35 ` Medvedkin, Vladimir
2020-11-05 15:58 ` [dpdk-dev] [PATCH v5 0/4] test/lpm: fix rcu qsbr perf test David Marchand
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