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CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(4636009)(39860400002)(396003)(346002)(376002)(136003)(46966005)(6636002)(47076004)(52536014)(478600001)(2906002)(82740400003)(186003)(81166007)(83380400001)(336012)(86362001)(5660300002)(33656002)(82310400003)(356005)(450100002)(8676002)(7696005)(316002)(8936002)(70586007)(6506007)(70206006)(4326008)(110136005)(55016002)(26005)(54906003)(9686003); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Nov 2020 01:31:09.4442 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: dd5b18a1-dbb1-42b7-e251-08d87f982459 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT019.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR08MB3893 Subject: Re: [dpdk-dev] [PATCH v2 1/4] test/lpm: fix cycle calculation in rcu qsbr perf X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" >=20 > Fix incorrect calculations for LPM adds, LPM deletes, and average cycles = in > RCU QSBR perf tests >=20 > Since, rcu qsbr tests run for 'RCU_ITERATIONS' and not 'ITERATIONS', repl= ace > 'ITERATIONS' with 'RCU_ITERATIONS' > for calculating adds, deletes, and cycles. >=20 > Also, for multi-writer perf test, each writer only writes half of > NUM_LDEPTH_ROUTE_ENTRIES. > For 2 writers, total adds (or deletes) should be (RCU_ITERATIONS * > NUM_LDEPTH_ROUTE_ENTRIES) instead of > (2 * RCU_ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES). >=20 > Since, for both the single and multi writer tests, total adds/deletes is = equal to > (RCU_ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES), this has been replaced > with a macro 'TOTAL_WRITES' and furthermore, 'g_writes' has been removed > since it is always a fixed value equal to TOTAL_WRITES. >=20 > Fixes: eff30b59cc2e ("test/lpm: add RCU performance tests") > Cc: honnappa.nagarahalli@arm.com > Cc: stable@dpdk.org >=20 > Signed-off-by: Dharmik Thakkar > Reviewed-by: Ruifeng Wang Looks good Reviewed-by: Honnappa Nagarahalli > --- > app/test/test_lpm_perf.c | 45 ++++++++++++++-------------------------- > 1 file changed, 16 insertions(+), 29 deletions(-) >=20 > diff --git a/app/test/test_lpm_perf.c b/app/test/test_lpm_perf.c index > c5a238b9d1e8..45164b23214b 100644 > --- a/app/test/test_lpm_perf.c > +++ b/app/test/test_lpm_perf.c > @@ -23,7 +23,6 @@ static struct rte_rcu_qsbr *rv; static volatile uint8_= t > writer_done; static volatile uint32_t thr_id; static uint64_t gwrite_cy= cles; - > static uint64_t gwrites; > /* LPM APIs are not thread safe, use mutex to provide thread safety */ > static pthread_mutex_t lpm_mutex =3D PTHREAD_MUTEX_INITIALIZER; >=20 > @@ -60,6 +59,8 @@ static uint32_t num_ldepth_route_entries; #define > NUM_ROUTE_ENTRIES num_route_entries #define > NUM_LDEPTH_ROUTE_ENTRIES num_ldepth_route_entries >=20 > +#define TOTAL_WRITES (RCU_ITERATIONS * > NUM_LDEPTH_ROUTE_ENTRIES) > + > enum { > IP_CLASS_A, > IP_CLASS_B, > @@ -432,7 +433,6 @@ test_lpm_rcu_qsbr_writer(void *arg) > uint8_t core_id =3D (uint8_t)((uintptr_t)arg); > uint32_t next_hop_add =3D 0xAA; >=20 > - RTE_SET_USED(arg); > /* 2 writer threads are used */ > if (core_id % 2 =3D=3D 0) { > si =3D 0; > @@ -472,9 +472,6 @@ test_lpm_rcu_qsbr_writer(void *arg) > total_cycles =3D rte_rdtsc_precise() - begin; >=20 > __atomic_fetch_add(&gwrite_cycles, total_cycles, > __ATOMIC_RELAXED); > - __atomic_fetch_add(&gwrites, > - 2 * NUM_LDEPTH_ROUTE_ENTRIES * > RCU_ITERATIONS, > - __ATOMIC_RELAXED); >=20 > return 0; > } > @@ -528,7 +525,6 @@ test_lpm_rcu_perf_multi_writer(void) >=20 > writer_done =3D 0; > __atomic_store_n(&gwrite_cycles, 0, __ATOMIC_RELAXED); > - __atomic_store_n(&gwrites, 0, __ATOMIC_RELAXED); >=20 > __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST); >=20 > @@ -548,14 +544,11 @@ test_lpm_rcu_perf_multi_writer(void) > if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0) > goto error; >=20 > - printf("Total LPM Adds: %d\n", > - 2 * ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES); > - printf("Total LPM Deletes: %d\n", > - 2 * ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES); > + 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) / > - __atomic_load_n(&gwrites, __ATOMIC_RELAXED) > - ); > + __atomic_load_n(&gwrite_cycles, __ATOMIC_RELAXED) > + / TOTAL_WRITES); >=20 > /* Wait and check return value from reader threads */ > writer_done =3D 1; > @@ -581,7 +574,6 @@ test_lpm_rcu_perf_multi_writer(void) >=20 > writer_done =3D 0; > __atomic_store_n(&gwrite_cycles, 0, __ATOMIC_RELAXED); > - __atomic_store_n(&gwrites, 0, __ATOMIC_RELAXED); > __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST); >=20 > /* Launch reader threads */ > @@ -600,14 +592,11 @@ test_lpm_rcu_perf_multi_writer(void) > if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0) > goto error; >=20 > - printf("Total LPM Adds: %d\n", > - 2 * ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES); > - printf("Total LPM Deletes: %d\n", > - 2 * ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES); > + 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) / > - __atomic_load_n(&gwrites, __ATOMIC_RELAXED) > - ); > + __atomic_load_n(&gwrite_cycles, __ATOMIC_RELAXED) > + / TOTAL_WRITES); >=20 > writer_done =3D 1; > /* Wait and check return value from reader threads */ @@ -711,11 > +700,10 @@ test_lpm_rcu_perf(void) > } > total_cycles =3D rte_rdtsc_precise() - begin; >=20 > - printf("Total LPM Adds: %d\n", ITERATIONS * > NUM_LDEPTH_ROUTE_ENTRIES); > - printf("Total LPM Deletes: %d\n", > - ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES); > + 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 / (NUM_LDEPTH_ROUTE_ENTRIES * > ITERATIONS)); > + (double)total_cycles / TOTAL_WRITES); >=20 > writer_done =3D 1; > /* Wait and check return value from reader threads */ @@ -771,11 > +759,10 @@ test_lpm_rcu_perf(void) > } > total_cycles =3D rte_rdtsc_precise() - begin; >=20 > - printf("Total LPM Adds: %d\n", ITERATIONS * > NUM_LDEPTH_ROUTE_ENTRIES); > - printf("Total LPM Deletes: %d\n", > - ITERATIONS * NUM_LDEPTH_ROUTE_ENTRIES); > + 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 / (NUM_LDEPTH_ROUTE_ENTRIES * > ITERATIONS)); > + (double)total_cycles / TOTAL_WRITES); >=20 > writer_done =3D 1; > /* Wait and check return value from reader threads */ > -- > 2.17.1