[dpdk] service core

dpdk 17.11 增加了一组新的API，serivce core

如命名，就是用一组core跑service函数。

我自己的测试程序如下：

https://github.com/tony-caotong/knickknack/tree/master/test/dpdk_service_core

测试程序的输出：

[root@D128 service_cores]# ./build/service_cores
EAL: Detected  lcore(s)
EAL: No free hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
registe service:
registe service:
main...
test.  @ core
test.  @ core
main...
test.  @ core
test.  @ core
main...
test.  @ core 

可以结合如下命令，查看线程信息，辅助理解处理流程。

[root@D128 dpdk-stable-17.11.]# top -H -p `pidof service_cores`

更多资料：

it is possible to assign specific workloads to each service core, and map N workloads to M number of service cores.

Each service lcore loops over the services that are enabled for that core, and invokes the function to run the service.

https://dpdk.org/doc/guides/prog_guide/service_cores.html

https://dpdk.org/doc/api/rte__service__component_8h_source.html

https://dpdk.org/doc/api/rte__service_8h_source.html