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setting number of huge pages when using OVSNFV

asked 2016-07-04 01:35:22 -0800

schmil gravatar image


I need to increase the amount of hugepages but can't find where it is done when using OVSNFV. Supposed it was set in grub but it isn't there.


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answered 2016-07-05 03:11:23 -0800

srik1782 gravatar image

Hi, Normally hugepages can be set as shown below:

> echo 1200 > /proc/sys/vm/nr_hugepages

If you want to set the hugepages by default while booting, you need to configure that in the grub configuration:

Edit '/etc/default/grub' file as shown below:

GRUBCMDLINELINUXDEFAULT="defaulthugepagesz=1G hugepagesz=1G hugepages=16 iommu=pt intel_iommu=on"

> update-grub

reboot and check with "cat /proc/cmdline".

But, by the way, did your deployment successful with the ovsnfv plugin in? Which OPNFV installer you are using? Fuel or Apex? I am using Fuel installer and my deployment is failing the with ovsnfv plugin.

Regards, Srikanth.

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I tried that but the configuration was reset by the configuration in the /etc/default/ovs-dpdk file Finally I found out that the amount can be set by using OVS_NUM_HUGEPAGES in the /etc/default/ovs-dpdk Note that the number given is per NUMA Samuel

schmil ( 2016-07-06 06:12:15 -0800 )edit

The following link describes the parameters that can be configured in /etc/default/ovs-dpdk

schmil ( 2016-07-06 06:13:35 -0800 )edit

answered 2016-07-10 03:23:48 -0800

schmil gravatar image

The best way to set the number of hugepages is to set the value OVSNUMHUGEPAGES in /etc/default/ovs-dpdk Note that the number given is per NUMA, so if you have 2 NUMAs set OVSNUMHUGEPAGES=TOTALREQUIREDPAGES/2

If '1G' value is used hugepages should be allocated before starting ovs, i.e.: at kernel boot command line as following defaulthugepagesz=1G hugepagesz=1G hugepages=16 and the following parameters should be set in /etc/default/ovs-dpdk OVSALLOCATEHUGEPAGES=false OVSHUGEPAGEMOUNT_PAGESIZE=1G

Regards, Samuel

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Asked: 2016-07-04 01:35:22 -0800

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Last updated: Jul 10 '16