Hello, For using DPDK, CPUs on compute host has to be isolated between Host, DPDK PMD and Guests. In order, to configure the host to use only specified CPUs, the CPUAffinity [1] configuration in /etc/systemd/system.conf needs to be used. Along with CPUAffinity, IRQ repining[2] needs to be done, to pin the interrupt requests to the CPUs dedicated to host processes.
We are planning to do the changes for configuring CPUAffinity and IRQ repining via puppet. We couldn't relate this configuration to any existing module. Could you please help us with the direction to enable these configurations? Regards, Saravanan KR Note: It is possible to use isolcpus via grub parameter, but it has implications [3] on load balancing. So it is recommended to use CPUAffinity to restrict CPUs for host process. [1] https://www.freedesktop.org/software/systemd/man/systemd-system.conf.html#CPUAffinity= [2] https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_MRG/1.3/html/Realtime_Tuning_Guide/sect-Realtime_Tuning_Guide-General_System_Tuning-Interrupt_and_Process_Binding.html [3] https://lists.freedesktop.org/archives/systemd-devel/2016-July/037187.html __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
