Bug 980893

Summary: sched_migration_cost should be changed when using tuned profile virtual_host
Product: Red Hat Enterprise Virtualization Manager Reporter: James Rankin <jrankin>
Component: rhev-hypervisorAssignee: Mike Burns <mburns>
Status: CLOSED DUPLICATE QA Contact: Pavel Stehlik <pstehlik>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: acathrow, bazulay, dfediuck, dougsland, iheim, jkt, jrankin, mburns, Rhev-m-bugs
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: sla
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2013-07-22 14:50:25 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: SLA RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description James Rankin 2013-07-03 13:06:33 UTC
For large numbers of RHEL guests, the performance team recommends taking sched_migration_cost to 10x the base value.

Comment 2 James Rankin 2013-07-03 13:19:50 UTC
For RHEL, also see:
https://bugzilla.redhat.com/show_bug.cgi?id=825222

Comment 3 Mike Burns 2013-07-03 13:28:33 UTC
For RHEV-H images, this is done as part of bug 965304.  It's worth noting that this is *only* done for RHEV-H.  For RHEL hosts, either vdsm or some other component would need to configure this if needed.

If we want to ensure it's done on RHEL hosts automatically, then this should move to a different component.  If not, then this can be closed as a duplicate of the above bug.

Comment 4 Itamar Heim 2013-07-05 07:04:41 UTC
afaik, we handle this for RHEL hosts as part of host bootstrap, so we do need this for RHEV-H.
worth mentioning to QE how to test the actual running value for this

Comment 5 Doron Fediuck 2013-07-05 09:06:51 UTC
OTOPI is needed only until Bug 825222 will handle it in RHEL.

Comment 6 Andrew Cathrow 2013-07-14 22:54:11 UTC
(In reply to Doron Fediuck from comment #5)
> OTOPI is needed only until Bug 825222 will handle it in RHEL.

Which doesn't look likely
So we need to handle this.

Doron, do you know if the virt-host profile handles this already?

Comment 7 Doron Fediuck 2013-07-16 14:53:19 UTC
(In reply to Andrew Cathrow from comment #6)
> (In reply to Doron Fediuck from comment #5)
> > OTOPI is needed only until Bug 825222 will handle it in RHEL.
> 
> Which doesn't look likely
> So we need to handle this.
> 
> Doron, do you know if the virt-host profile handles this already?

Andy, not yet. We should monitor bug 969491 for that.

Comment 8 Andrew Cathrow 2013-07-22 14:50:25 UTC
Closing as dupe as this will be handled in 6.5 BZ 969491

*** This bug has been marked as a duplicate of bug 969491 ***