[dpdk-dev] [PATCH v1] test/ring: ring perf test case enhancement

Thomas Monjalon thomas at monjalon.net
Thu Dec 20 12:40:26 CET 2018


+Cc Olivier, maintainer of the ring library.

20/12/2018 12:33, Gavin Hu:
> From: Joyce Kong <joyce.kong at arm.com>
> 
> Run ring perf test on all available cores to really verify MPMC operations.
> The old way of running on a pair of cores is not enough for MPMC rings. We
> used this test case for ring optimization and it was really helpful for
> measuring the ring performance in multi-core environment.
> 
> Suggested-by: Gavin Hu <gavin.hu at arm.com>
> Signed-off-by: Joyce Kong <joyce.kong at arm.com>
> Reviewed-by: Ruifeng Wang <Ruifeng.Wang at arm.com>
> Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli at arm.com>
> Reviewed-by: Dharmik Thakkar <Dharmik.Thakkar at arm.com>
> Reviewed-by: Ola Liljedahl <Ola.Liljedahl at arm.com>
> Reviewed-by: Gavin Hu <gavin.hu at arm.com>
> ---
>  test/test/test_ring_perf.c | 82 ++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 80 insertions(+), 2 deletions(-)
> 
> diff --git a/test/test/test_ring_perf.c b/test/test/test_ring_perf.c
> index ebb3939..819d119 100644
> --- a/test/test/test_ring_perf.c
> +++ b/test/test/test_ring_perf.c
> @@ -20,12 +20,17 @@
>   *  * Empty ring dequeue
>   *  * Enqueue/dequeue of bursts in 1 threads
>   *  * Enqueue/dequeue of bursts in 2 threads
> + *  * Enqueue/dequeue of bursts in all available threads
>   */
>  
>  #define RING_NAME "RING_PERF"
>  #define RING_SIZE 4096
>  #define MAX_BURST 32
>  
> +#ifndef ARRAY_SIZE
> +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
> +#endif
> +
>  /*
>   * the sizes to enqueue and dequeue in testing
>   * (marked volatile so they won't be seen as compile-time constants)
> @@ -248,9 +253,78 @@ run_on_core_pair(struct lcore_pair *cores, struct rte_ring *r,
>  	}
>  }
>  
> +static rte_atomic32_t synchro;
> +static uint64_t queue_count[RTE_MAX_LCORE] = {0};
> +
> +#define TIME_MS 100
> +
> +static int
> +load_loop_fn(void *p)
> +{
> +	uint64_t time_diff = 0;
> +	uint64_t begin = 0;
> +	uint64_t hz = rte_get_timer_hz();
> +	uint64_t lcount = 0;
> +	const unsigned int lcore = rte_lcore_id();
> +	struct thread_params *params = p;
> +	void *burst[MAX_BURST] = {0};
> +
> +	/* wait synchro for slaves */
> +	if (lcore != rte_get_master_lcore())
> +		while (rte_atomic32_read(&synchro) == 0)
> +			rte_pause();
> +
> +	begin = rte_get_timer_cycles();
> +	while (time_diff < hz * TIME_MS / 1000) {
> +		rte_ring_mp_enqueue_bulk(params->r, burst, params->size, NULL);
> +		rte_ring_mc_dequeue_bulk(params->r, burst, params->size, NULL);
> +		lcount++;
> +		time_diff = rte_get_timer_cycles() - begin;
> +	}
> +	queue_count[lcore] = lcount;
> +	return 0;
> +}
> +
> +static int
> +run_on_all_cores(struct rte_ring *r)
> +{
> +	uint64_t total = 0;
> +	struct thread_params param = {0};
> +	unsigned int i, c;
> +	for (i = 0; i < ARRAY_SIZE(bulk_sizes); i++) {
> +		printf("\nBulk enq/dequeue count on size %u\n", bulk_sizes[i]);
> +		param.size = bulk_sizes[i];
> +		param.r = r;
> +
> +		/* clear synchro and start slaves */
> +		rte_atomic32_set(&synchro, 0);
> +		if (rte_eal_mp_remote_launch(load_loop_fn,
> +				&param, SKIP_MASTER) < 0)
> +			return -1;
> +
> +		/* start synchro and launch test on master */
> +		rte_atomic32_set(&synchro, 1);
> +		load_loop_fn(&param);
> +
> +		rte_eal_mp_wait_lcore();
> +
> +		RTE_LCORE_FOREACH(c) {
> +			printf("Core [%u] count = %"PRIu64"\n",
> +					c, queue_count[c]);
> +			total += queue_count[c];
> +		}
> +
> +		printf("Total count (size: %u): %"PRIu64"\n", bulk_sizes[i],
> +						total);
> +	}
> +
> +	return 0;
> +}
> +
>  /*
> - * 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.
> + * 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(struct rte_ring *r)
> @@ -394,6 +468,10 @@ test_ring_perf(void)
>  		printf("\n### Testing using two NUMA nodes ###\n");
>  		run_on_core_pair(&cores, r, enqueue_bulk, dequeue_bulk);
>  	}
> +
> +	printf("\n### Testing using all slave nodes ###\n");
> +	run_on_all_cores(r);
> +
>  	rte_ring_free(r);
>  	return 0;
>  }
> 







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