Re: EAL: eal_memalloc_alloc_seg_bulk(): couldn't find suitable memseg_list

[Don Trotter <djtrotter@yahoo.com>]

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 On Thursday, September 7, 2023 at 03:21:12 PM CDT, Stephen Hemminger <stephen@networkplumber.org> wrote:

On Thu, 7 Sep 2023 19:58:35 +0000 (UTC)
Don Trotter <djtrotter@yahoo.com> wrote:

>  To clarify, the log message when my application called rte_mempool_create() to create the "node_pool", and the call succeeded.
> Thanks,Don Trotter
>    On Thursday, September 7, 2023 at 01:54:08 PM CDT, Don Trotter <djtrotter@yahoo.com> wrote: 
> 
>  Hi,
> I have recently started using DPDK. I am working on a project on OcteonTX2 with DPDK 11.23.01. I am seeing this message from EAL during EAL init, but everything is working.
>     EAL: eal_memalloc_alloc_seg_bulk(): couldn't find suitable memseg_list
> The system has 96GB of memory.  These 2 pools get created and everything works fine.
> mempool <mbuf_pool>@0x13fed3e00  flags=10  socket_id=0  pool=0x1140300000  iova=0x13fed3e00  nb_mem_chunks=1  size=65535  populated_size=65535  header_size=128  elt_size=10200  trailer_size=40  total_obj_size=10368  private_data_size=128  ops_index=0  ops_name: <cn9k_mempool_ops>  avg bytes/object=10368.558602
> mempool <node_pool>@0x1575d8180  flags=10  socket_id=-1  pool=0x19ffffd00  iova=0x1575d8180  nb_mem_chunks=2  size=134217727  populated_size=134217727  header_size=128  elt_size=256  trailer_size=0  total_obj_size=384  private_data_size=0  ops_index=3  ops_name: <ring_mp_mc>  avg bytes/object=384.000094
> You read that right. I’ve got 128*1024*1024 256 byte buffers created for data.
> I also see there is still heap left, although pretty low after.
> Heap id:0        Heap name:socket_0        Heap_size:55834574848,        Free_size:2403644544,        Alloc_size:53430930304,        Greatest_free_size:536870016,        Alloc_count:293,        Free_count:5,
> Linux free stats.
> tmp# free -h -w              total        used        free      shared     buffers       cache   availableMem:           95Gi        88Gi       6.5Gi       444Mi          0B       470Mi       599MiSwap:            0B          0B          0B
> Is there anything wrong with that EAL log? Is there a lurking problem?
> Thanks,Don Trotter
>
> 

Did you setup hugepages?
How many and what size?
Is this a NUMA system?

Also 11.23.01 seems like a weird release number.
The DPDK release numbering scheme is year followed by month. I.e. 22.11 was released in November of 2022

# cat /sys/kernel/mm/hugepages/hugepages-524288kB/nr_hugepages176
Yes it is a NUMA system.
You are correct sir. The SDK is SDK11.23.01 (2023-01) and DPDK is 22.11.   
Thanks, Don Trotter
  

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