Windows mbuf pool memory allocation

[Robert Hable]

Hello,

I have a question about mbuf pool memory allocation. When I have my machine freshly started, it usually works flawless to run testpmd. But after a few days uptime sometimes the allocation of the mbuf pool fails. Currently I get the error "Not enough space".
What could be the reason behind this that it works after a reboot, but not after a few days uptime?
According to the windows taskmanager there is still 32.8 GB free memory, and only 30.3 GB is currently used.

c:\Dev\Extern\dpdk\build\app>dpdk-testpmd.exe
EAL: Detected CPU lcores: 20
EAL: Detected NUMA nodes: 1
EAL: Multi-process support is requested, but not available.
EAL: Probe PCI driver: mlx5_pci (15b3:1015) device: 0000:01:00.0 (socket 0)
mlx5_common: DevX read access NIC register=0X9055 failed errno=0 status=0 syndrome=0
mlx5_net: mlx5_os_dev_shared_handler_install: is not supported
mlx5_net: Rx CQE 128B compression is not supported.
EAL: Probe PCI driver: mlx5_pci (15b3:1015) device: 0000:01:00.1 (socket 0)
mlx5_common: DevX read access NIC register=0X9055 failed errno=0 status=0 syndrome=0
mlx5_net: mlx5_os_dev_shared_handler_install: is not supported
mlx5_net: Rx CQE 128B compression is not supported.
testpmd: create a new mbuf pool <mb_pool_0>: n=299456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
EAL: Error - exiting with code: 1
  Cause: Creation of mbuf pool for socket 0 failed: Not enough space

Regards,
Robert Hable

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