dpdk: set lcores parameter for high lcore id

dpdk: set lcores parameter for high lcore id

DPDK is most often compiled with RTE_MAX_LCORE=128. On systems which
have more than 128 cores, its necessary to remap the active cores onto
the available 128 cores, using the --lcores parameter. Since VPP does
not use RTE threads, there's no reason DPDK needs to know anything
about VPPs threads. However, DPDK does attempt to pin the thread calling
rte_eal_init() to the current cpu, which can fail if the lcore ID
exceeds RTE_MAX_LCORE.

This commit implements a simple workaround, which is to map VPP's main
lcore to DPDK lcore 0 whenever VPP's main_lcore exceeds RTE_MAX_LCORE.

Type: fix

Change-Id: I3cba5f5f26aed7ec62c70a50bac4c80d78d9d944
Signed-off-by: Jeff Shaw <[email protected]>