DescriptionPradipta Kumar Sahoo
2020-06-10 17:18:06 UTC
Description of problem:
In NFV-RT-based deployment, the nova-compute configuration needs a further tunning with below parameters.
# grep ^[^#] /var/lib/config-data/puppet-generated/nova_libvirt/etc/nova/nova.conf | grep -E "mem_stats_period_seconds|cpu_mode|cpu_model_extra_flags"
cpu_mode=host-passthrough
cpu_model_extra_flags=tsc-deadline
mem_stats_period_seconds=0
We have tripleo hiredata "NovaLibvirtMemStatsPeriodSeconds: 0" to set nova.conf file with the following parameter "mem_stats_period_seconds=0"
Hence we need similar options for other to parameters:
cpu_mode=host-passthrough
cpu_model_extra_flags=tsc-deadline
Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux release 8.2 (Ootpa)
Red Hat OpenStack Platform release 16.1 (Train)
How reproducible: 100% reproduced in NFV perf lab.
Steps to Reproduce:
We have tried with following tripleo environment options but didn't help.
NovaLibvirtCpuMode: host-passthrough
NovaLibvirtCpuModelExtraFlags: tsc-deadline
Comment 23Martin Schuppert
2020-11-25 10:25:03 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Red Hat OpenStack Platform 16.1.3 bug fix and enhancement advisory), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2020:5413
Description of problem: In NFV-RT-based deployment, the nova-compute configuration needs a further tunning with below parameters. # grep ^[^#] /var/lib/config-data/puppet-generated/nova_libvirt/etc/nova/nova.conf | grep -E "mem_stats_period_seconds|cpu_mode|cpu_model_extra_flags" cpu_mode=host-passthrough cpu_model_extra_flags=tsc-deadline mem_stats_period_seconds=0 We have tripleo hiredata "NovaLibvirtMemStatsPeriodSeconds: 0" to set nova.conf file with the following parameter "mem_stats_period_seconds=0" Hence we need similar options for other to parameters: cpu_mode=host-passthrough cpu_model_extra_flags=tsc-deadline Version-Release number of selected component (if applicable): Red Hat Enterprise Linux release 8.2 (Ootpa) Red Hat OpenStack Platform release 16.1 (Train) How reproducible: 100% reproduced in NFV perf lab. Steps to Reproduce: We have tried with following tripleo environment options but didn't help. NovaLibvirtCpuMode: host-passthrough NovaLibvirtCpuModelExtraFlags: tsc-deadline