Bug 1036011

Summary:	RFE: do not slow rendering & guest if client is slow
Product:	Red Hat Enterprise Linux 7	Reporter:	Shaolong Hu <shu>
Component:	spice	Assignee:	Default Assignee for SPICE Bugs <rh-spice-bugs>
Status:	CLOSED WONTFIX	QA Contact:	SPICE QE bug list <spice-qe-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0	CC:	cfergeau, dblechte, djasa, fziglio, hhuang, juzhang, marcandre.lureau, michen, tpelka, virt-maint
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	7.5
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-12-03 16:47:33 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Shaolong Hu 2013-11-29 07:53:02 UTC

Description of problem:
-------------------------
Connect guest with spice under poor network speed, guest running slow.


Version-Release number of selected component (if applicable):
--------------------------------------------------------------
qemu-kvm-1.5.3-19.el7.x86_64



How reproducible:
------------------
100%


Steps to Reproduce:
--------------------
1. boot guest with qxl and spice connection

2. connect guest on another host which has poor network speed to the host running the guest (suggest using wireless or vpn to reproduce).

3. reboot guest, booting log shows up one line by one line, comparing to vnc, booting log shows up tens of lines by tens of lines (for poor speed, when next frame refreshes, tens of lines have been generated, this is understandable, but with spice, it looks like guest runs really slow rather than only displaying, it takes far more time with spice to boot up)

4. run dmesg in guest, the situation is the same with step 3, with spice, the dmesg message shows up one line by one line, it takes very long time to display all log.


Expected results:
-------------------
spice should behavior like vnc when network is poor. 


Additional info:
------------------
both guest and host are in level 3 during testing.

Comment 2 RHEL Program Management 2014-03-22 06:26:32 UTC

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Comment 3 Marc-Andre Lureau 2014-07-06 21:46:25 UTC

this is due to spice server design, which will "slow" rendering for the client connection to get all relevant drawing operations. imho, this is a bad design and it should be improved. However, given that it was done like this by design, it is not a bug and should be an like "RFE: do not slow rendering & guest if client is slow"

Comment 5 Marc-Andre Lureau 2015-01-02 15:36:46 UTC

moving to 7.2

Comment 10 Marc-Andre Lureau 2015-04-21 23:52:45 UTC

unlikely to happen in 7.2, it must first land upstream. imho, we should consider moving the bug there.

Comment 13 David Blechter 2016-12-12 12:47:01 UTC

not for 7.4, we'll look at it upstream first and likely on new re-factoring server

Comment 14 David Blechter 2018-12-03 16:47:33 UTC

No plans for re-design. Focusing on HW acceleration with 3D support.