Hi Thomas,

On 2/29/2016 5:12 AM, Thomas Monjalon wrote:

Hi,

2016-01-29 19:22, Jianfeng Tan:

quoted

Current issue: DPDK is not that friendly to container environment, which
caused by that it pre-alloc resource like cores and hugepages. But there
are this or that resource limitations, for examples, cgroup, rlimit,
cpuset, etc.

For cores, this patch makes use of pthread_getaffinity_np to further
narrow down detected cores before parsing coremask (-c), corelist (-l),
and coremap (--lcores).

For hugepages, this patch adds a recover mechanism to the case that
there are no that many hugepages can be used. It relys on a mem access
to fault-in hugepages, and if fails with SIGBUS, recover to previously
saved stack environment with siglongjmp().

They are some interesting ideas.
However, I am not sure a library should try to be so smart silently.
It needs more feedback to decide wether it can be the default behaviour
or an option.

Please send coremask and hugepage mapping as separate patches as they
are totally different and may be integrated separately.

Good advise, thanks! I'll do it.

And one more thing FYI, coremask using pthread_getaffinity_np() may have 
issue on some Linux versions or distros: it excludes isolcpus. This is 
reported by Sergio Gonzalez Monroy [off-list ref], 
and I'm still working it out.

Thanks,
Jianfeng

Thanks