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Bug 1662287

Summary: [virtio-win] [netkvm] poor performance on Windows Server 2019 in some cases.
Product: Red Hat Enterprise Linux 8 Reporter: Quan Wenli <wquan>
Component: virtio-winAssignee: ybendito
virtio-win sub component: virtio-win-prewhql QA Contact: Quan Wenli <wquan>
Status: CLOSED NOTABUG Docs Contact:
Severity: high    
Priority: high CC: ailan, chayang, juzhang, kanderso, lijin, mtessun, wquan, yama, ybendito, yvugenfi
Version: 8.0Flags: pm-rhel: mirror+
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1754755 (view as bug list) Environment:
Last Closed: Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1682882    
Bug Blocks: 1746622, 1754755    

Comment 9 ybendito 2019-10-11 14:19:58 UTC
In addition to comment #2 (request to enable hv-stimer): (it does not )
Please enable following enlightenments for 2019: hv-vpindex, hv-synic, hv-time, hv-stimer

Comment 10 ybendito 2019-10-11 14:21:34 UTC
Note: hv-stimer does not have a positive effect without hv-vpindex, hv-synic, hv-time
According to https://fossies.org/linux/qemu/docs/hyperv.txt

Comment 11 Quan Wenli 2019-10-17 07:36:36 UTC
(In reply to ybendito from comment #9)
> In addition to comment #2 (request to enable hv-stimer): (it does not )
> Please enable following enlightenments for 2019: hv-vpindex, hv-synic,
> hv-time, hv-stimer

Ok, I have arrange the tests, will update results when it done.

Comment 16 Yvugenfi@redhat.com 2019-11-05 09:40:17 UTC
Closing based on comments #10 and comment #12.

hv flags that made positive effects are already should be added by the management layers to default.

Comment 17 Yvugenfi@redhat.com 2019-11-05 09:40:17 UTC
Closing based on comments #10 and comment #12.

hv flags that made positive effects are already should be added by the management layers to default.