Re: [dpdk-stable] [PATCH v3 1/3] test/test/mempool_perf: Remove mempool global vars

[Olivier MATZ <olivier.matz@6wind.com>]

Hi Santosh,

On Tue, 18 Apr 2017 14:04:46 +0530, Santosh Shukla <santosh.shukla@caviumnetworks.com> wrote:
> Cc: stable@dpdk.org
> Signed-off-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
> ---
> v3:
>  - Cleanup code change as per discussion in 
>    http://dpdk.org/dev/patchwork/patch/23262/
> 
>  test/test/test_mempool_perf.c | 61 ++++++++++++++++++++++---------------------
>  1 file changed, 31 insertions(+), 30 deletions(-)
> 
> diff --git a/test/test/test_mempool_perf.c b/test/test/test_mempool_perf.c
> index ebf1721ac..213fcba5d 100644
> --- a/test/test/test_mempool_perf.c
> +++ b/test/test/test_mempool_perf.c
> @@ -109,8 +109,6 @@
>  		goto label;						\
>  	} while (0)
>  
> -static struct rte_mempool *mp;
> -static struct rte_mempool *mp_cache, *mp_nocache;
>  static int use_external_cache;
>  static unsigned external_cache_size = RTE_MEMPOOL_CACHE_MAX_SIZE;
>  
> @@ -144,10 +142,11 @@ my_obj_init(struct rte_mempool *mp, __attribute__((unused)) void *arg,
>  }
>  
>  static int
> -per_lcore_mempool_test(__attribute__((unused)) void *arg)
> +per_lcore_mempool_test(void *arg)
>  {
>  	void *obj_table[MAX_KEEP];
>  	unsigned i, idx;
> +	struct rte_mempool *mp = (struct rte_mempool *)arg;

as a nit: the cast is not required.


>  	unsigned lcore_id = rte_lcore_id();
>  	int ret = 0;
>  	uint64_t start_cycles, end_cycles;
> @@ -221,7 +220,7 @@ per_lcore_mempool_test(__attribute__((unused)) void *arg)
>  
>  /* launch all the per-lcore test, and display the result */
>  static int
> -launch_cores(unsigned cores)
> +launch_cores(struct rte_mempool *mp, unsigned cores)
>  {
>  	unsigned lcore_id;
>  	uint64_t rate;
> @@ -249,13 +248,13 @@ launch_cores(unsigned cores)
>  			break;
>  		cores--;
>  		rte_eal_remote_launch(per_lcore_mempool_test,
> -				      NULL, lcore_id);
> +				      mp, lcore_id);
>  	}
>  
>  	/* start synchro and launch test on master */
>  	rte_atomic32_set(&synchro, 1);
>  
> -	ret = per_lcore_mempool_test(NULL);
> +	ret = per_lcore_mempool_test(mp);
>  
>  	cores = cores_save;
>  	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
> @@ -282,7 +281,7 @@ launch_cores(unsigned cores)
>  
>  /* for a given number of core, launch all test cases */
>  static int
> -do_one_mempool_test(unsigned cores)
> +do_one_mempool_test(struct rte_mempool *mp, unsigned cores)
>  {
>  	unsigned bulk_tab_get[] = { 1, 4, 32, 0 };
>  	unsigned bulk_tab_put[] = { 1, 4, 32, 0 };
> @@ -299,7 +298,7 @@ do_one_mempool_test(unsigned cores)
>  				n_get_bulk = *get_bulk_ptr;
>  				n_put_bulk = *put_bulk_ptr;
>  				n_keep = *keep_ptr;
> -				ret = launch_cores(cores);
> +				ret = launch_cores(mp, cores);
>  
>  				if (ret < 0)
>  					return -1;
> @@ -312,26 +311,28 @@ do_one_mempool_test(unsigned cores)
>  static int
>  test_mempool_perf(void)
>  {
> +	struct rte_mempool *mp = NULL;
> +	struct rte_mempool *mp_cache = NULL;
> +	struct rte_mempool *mp_nocache = NULL;
> +
>  	rte_atomic32_init(&synchro);
>  
>  	/* create a mempool (without cache) */
> -	if (mp_nocache == NULL)
> -		mp_nocache = rte_mempool_create("perf_test_nocache", MEMPOOL_SIZE,
> -						MEMPOOL_ELT_SIZE, 0, 0,
> -						NULL, NULL,
> -						my_obj_init, NULL,
> -						SOCKET_ID_ANY, 0);
> +	mp_nocache = rte_mempool_create("perf_test_nocache", MEMPOOL_SIZE,
> +					MEMPOOL_ELT_SIZE, 0, 0,
> +					NULL, NULL,
> +					my_obj_init, NULL,
> +					SOCKET_ID_ANY, 0);
>  	if (mp_nocache == NULL)
>  		return -1;
>  
>  	/* create a mempool (with cache) */
> -	if (mp_cache == NULL)
> -		mp_cache = rte_mempool_create("perf_test_cache", MEMPOOL_SIZE,
> -					      MEMPOOL_ELT_SIZE,
> -					      RTE_MEMPOOL_CACHE_MAX_SIZE, 0,
> -					      NULL, NULL,
> -					      my_obj_init, NULL,
> -					      SOCKET_ID_ANY, 0);
> +	mp_cache = rte_mempool_create("perf_test_cache", MEMPOOL_SIZE,
> +				      MEMPOOL_ELT_SIZE,
> +				      RTE_MEMPOOL_CACHE_MAX_SIZE, 0,
> +				      NULL, NULL,
> +				      my_obj_init, NULL,
> +				      SOCKET_ID_ANY, 0);
>  	if (mp_cache == NULL)
>  		return -1;
>  
> @@ -339,26 +340,26 @@ test_mempool_perf(void)
>  	printf("start performance test (without cache)\n");
>  	mp = mp_nocache;
>  
> -	if (do_one_mempool_test(1) < 0)
> +	if (do_one_mempool_test(mp, 1) < 0)
>  		return -1;

We could even do shorter: the mp variable can probably be removed, and
directly replaced by mp_nocache or mp_cache in function calls.


Thanks,
Olivier