[dpdk-dev] [PATCH 3/6] service cores: EAL init changes

[Jerin Jacob]

-----Original Message-----
> Date: Fri, 23 Jun 2017 10:06:16 +0100
> From: Harry van Haaren <harry.van.haaren at intel.com>
> To: dev at dpdk.org
> CC: thomas at monjalon.net, jerin.jacob at caviumnetworks.com,
>  keith.wiles at intel.com, bruce.richardson at intel.com, Harry van Haaren
>  <harry.van.haaren at intel.com>
> Subject: [PATCH 3/6] service cores: EAL init changes
> X-Mailer: git-send-email 2.7.4
> 
> This commit shows the changes required in rte_eal_init()
> to transparently launch the service threads. The threads
> are launched into the service worker functions here because
> after rte_eal_init() the application is not gauranteed to
> call any other DPDK API.
> 
> As the registration of services happens at initialization
> time, the services that require CPU time are already available
> when we reach the end of rte_eal_init().
> 
> Signed-off-by: Harry van Haaren <harry.van.haaren at intel.com>
> ---
>  lib/librte_eal/linuxapp/eal/eal.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c

Need to add bsdapp implementation for the same.

> index 7c78f2d..4d6ad0e 100644
> --- a/lib/librte_eal/linuxapp/eal/eal.c
> +++ b/lib/librte_eal/linuxapp/eal/eal.c
> @@ -78,6 +78,7 @@
>  #include <rte_version.h>
>  #include <rte_atomic.h>
>  #include <malloc_heap.h>
> +#include <rte_service_private.h>
>  
>  #include "eal_private.h"
>  #include "eal_thread.h"
> @@ -939,6 +940,20 @@ rte_eal_init(int argc, char **argv)
>  		return -1;
>  	}
>  
> +	/* initialize service core threads and default service-core mapping */
> +	struct rte_config *config = rte_eal_get_configuration();
> +	uint32_t service_cores[RTE_MAX_LCORE];
> +	int count = rte_service_core_list(service_cores, RTE_MAX_LCORE);
> +	for (i = 0; i < count; i++) {
> +		config->lcore_role[service_cores[i]] = ROLE_SERVICE;

Can we move this change inside rte_service_core_start() itself?
otherwise every application needs to the same. Right?

> +		rte_service_core_start(service_cores[i]);
> +	}
> +	ret = rte_service_init_default_mapping();
> +	if (ret) {
> +		rte_errno = ENOEXEC;
> +		return -1;
> +	}
> +
>  	rte_eal_mcfg_complete();
>  
>  	return fctret;

With above changes:
Acked-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>

> -- 
> 2.7.4
>