[dpdk-dev] [PATCH v2] service: add API for service count per lcore
Van Haaren, Harry
harry.van.haaren at intel.com
Tue Aug 29 11:57:11 CEST 2017
> From: Pavan Nikhilesh [mailto:pbhagavatula at caviumnetworks.com]
> Sent: Monday, August 28, 2017 5:07 PM
> To: Van Haaren, Harry <harry.van.haaren at intel.com>
> Cc: dev at dpdk.org; Pavan Nikhilesh <pbhagavatula at caviumnetworks.com>
> Subject: [dpdk-dev] [PATCH v2] service: add API for service count per lcore
>
> This new API returns the number of services that are running on a specific
> service core. It allows an application to decide which service core to run
> a new service on.
>
> Signed-off-by: Pavan Nikhilesh <pbhagavatula at caviumnetworks.com>
> ---
>
> v2 changes:
> - reword the commit title according to the check-git-log.sh
> - modify return types
> - add function to .map file
Generally looks good, compile testing flags an error in the .map files (inline comment below).
Perhaps mark the v1 patch as "Superseeded" in patchwork - keeps things tidy :)
> lib/librte_eal/bsdapp/eal/rte_eal_version.map | 7 +++++++
> lib/librte_eal/common/include/rte_service.h | 13 +++++++++++++
> lib/librte_eal/common/rte_service.c | 13 +++++++++++++
> lib/librte_eal/linuxapp/eal/rte_eal_version.map | 7 +++++++
> 4 files changed, 40 insertions(+)
>
> diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> index aac6fd7..5fe8d79 100644
> --- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> +++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> @@ -237,3 +237,10 @@ EXPERIMENTAL {
> rte_service_unregister;
>
> } DPDK_17.08;
> +
> +EXPERIMENTAL {
> + global:
> +
> + rte_service_lcore_count_services;
> +
> +} DPDK_17.11;
The compile test output shows something here (and in linuxapp .map file) to be an issue:
http://dpdk.org/ml/archives/test-report/2017-August/027931.html
I think that the function can just be added in the "Experimental" section based on "DPDK_17.08".
No need to define a new experimental section.
> diff --git a/lib/librte_eal/common/include/rte_service.h
> b/lib/librte_eal/common/include/rte_service.h
> index 7c6f738..9537ae5 100644
> --- a/lib/librte_eal/common/include/rte_service.h
> +++ b/lib/librte_eal/common/include/rte_service.h
> @@ -374,6 +374,19 @@ int32_t rte_service_lcore_list(uint32_t array[], uint32_t n);
> * @warning
> * @b EXPERIMENTAL: this API may change without prior notice
> *
> + * Get the numer of services running on the supplied lcore.
> + *
> + * @param Lcore Id of the service core.
> + * @retval >=0 Number of services registered to this core.
> + * @retval -EINVAL Invalid lcore provided
> + * @retval -ENOTSUP The provided lcore is not a service core.
> + */
> +int32_t rte_service_lcore_count_services(uint32_t lcore);
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change without prior notice
> + *
> * Dumps any information available about the service. If service is NULL,
> * dumps info for all services.
> */
> diff --git a/lib/librte_eal/common/rte_service.c b/lib/librte_eal/common/rte_service.c
> index 7efb76d..616bad3 100644
> --- a/lib/librte_eal/common/rte_service.c
> +++ b/lib/librte_eal/common/rte_service.c
> @@ -397,6 +397,19 @@ rte_service_lcore_list(uint32_t array[], uint32_t n)
> }
>
> int32_t
> +rte_service_lcore_count_services(uint32_t lcore)
> +{
> + if (lcore >= RTE_MAX_LCORE)
> + return -EINVAL;
> +
> + struct core_state *cs = &lcore_states[lcore];
> + if (!cs->is_service_core)
> + return -ENOTSUP;
> +
> + return __builtin_popcountll(cs->service_mask);
> +}
> +
> +int32_t
> rte_service_start_with_defaults(void)
> {
> /* create a default mapping from cores to services, then start the
> diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
> b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
> index 3a8f154..e848c45 100644
> --- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
> +++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
> @@ -242,3 +242,10 @@ EXPERIMENTAL {
> rte_service_unregister;
>
> } DPDK_17.08;
> +
> +EXPERIMENTAL {
> + global:
> +
> + rte_service_lcore_count_services;
> +
> +} DPDK_17.11;
> --
> 2.7.4
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