Public bug reported:
Description of problem:
When using the cpu_realtime and cpu_realtim_mask flag to create new instance,
the 'cpuset' of 'emulatorpin' option is using the id of vcpu which is
incorrect. The id of host cpu should be used here.
e.g.
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='3'/>
<emulatorpin cpuset='0'/> ### the cpuset should be '2' here, when
cpu_realtime_mask=^0.
<vcpusched vcpus='1' scheduler='fifo' priority='1'/>
</cputune>
How reproducible:
Boot new instance with cpu_realtime_mask flavor.
Steps to Reproduce:
1. Create RT flavor
nova flavor-create m1.small.performance 6 2048 20 2
nova flavor-key m1.small.performance set hw:cpu_realtime=yes
nova flavor-key m1.small.performance set hw:cpu_realtime_mask=^0
nova flavor-key m1.small.performance set hw:cpu_policy=dedicated
2. Boot a instance with this flavor
3. Check the xml of the new instance
Actual results:
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='3'/>
<emulatorpin cpuset='0'/>
<vcpusched vcpus='1' scheduler='fifo' priority='1'/>
</cputune>
Expected results:
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='3'/>
<emulatorpin cpuset='2'/>
<vcpusched vcpus='1' scheduler='fifo' priority='1'/>
</cputune>
** Affects: nova
Importance: Undecided
Assignee: sahid (sahid-ferdjaoui)
Status: In Progress
** Tags: liberty-backport-potential libvirt
** Changed in: nova
Assignee: (unassigned) => sahid (sahid-ferdjaoui)
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https://bugs.launchpad.net/bugs/1614054
Title:
Incorrect host cpu is given to emulator threads when cpu_realtime_mask
flag is set
Status in OpenStack Compute (nova):
In Progress
Bug description:
Description of problem:
When using the cpu_realtime and cpu_realtim_mask flag to create new instance,
the 'cpuset' of 'emulatorpin' option is using the id of vcpu which is
incorrect. The id of host cpu should be used here.
e.g.
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='3'/>
<emulatorpin cpuset='0'/> ### the cpuset should be '2' here,
when cpu_realtime_mask=^0.
<vcpusched vcpus='1' scheduler='fifo' priority='1'/>
</cputune>
How reproducible:
Boot new instance with cpu_realtime_mask flavor.
Steps to Reproduce:
1. Create RT flavor
nova flavor-create m1.small.performance 6 2048 20 2
nova flavor-key m1.small.performance set hw:cpu_realtime=yes
nova flavor-key m1.small.performance set hw:cpu_realtime_mask=^0
nova flavor-key m1.small.performance set hw:cpu_policy=dedicated
2. Boot a instance with this flavor
3. Check the xml of the new instance
Actual results:
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='3'/>
<emulatorpin cpuset='0'/>
<vcpusched vcpus='1' scheduler='fifo' priority='1'/>
</cputune>
Expected results:
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='3'/>
<emulatorpin cpuset='2'/>
<vcpusched vcpus='1' scheduler='fifo' priority='1'/>
</cputune>
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https://bugs.launchpad.net/nova/+bug/1614054/+subscriptions
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