On 24-Jul-18 11:23 AM, Thomas Monjalon wrote:
24/07/2018 12:03, Anatoly Burakov:
It has been reported that current memory limitations do not work
well on an 8-socket machines in default configuration when big
page sizes are used [1].
Fix it by reducing memory amount reserved by DPDK by default to
32G per page size per NUMA node. This translates to allowing us
to reserve 32G per page size per NUMA node on 8 nodes with 2
page sizes.
[1] https://mails.dpdk.org/archives/dev/2018-July/108071.html
Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---
Notes:
We could have increased CONFIG_RTE_MAX_MEM_MB but this would've
brought other potential problems due to increased memory
preallocation, and secondary process initialization is flaky
enough as it is. I am willing to bet that 32G per page size is
more than enough for the majority of use cases, and any
application with bigger requirements could adjust config options
itself.
[...]
-CONFIG_RTE_MAX_MEMSEG_PER_TYPE=32768
-CONFIG_RTE_MAX_MEM_MB_PER_TYPE=131072
+CONFIG_RTE_MAX_MEMSEG_PER_TYPE=16384
+CONFIG_RTE_MAX_MEM_MB_PER_TYPE=32768
Ideally, it should be a run-time option.
It can be, yes, and this can be worked on for next release. However, we
also need to have good default values that work across all supported
platforms.
--
Thanks,
Anatoly
