Mailing List Archive: MythTV: Dev

alphapulse caues 100% load but only on 1080p

Index | Next | Previous | View Threaded

warpme at o2

Nov 7, 2009, 12:07 PM

Post #1 of 4 (269 views)
Permalink

alphapulse caues 100% load but only on 1080p

Hi *

I have issue with enabling alphapulse in themes - it causes 100% load on
CPU one core (AMD X2 4400) .

I'm wonder is my issue somehow related to
http://www.gossamer-threads.com/lists/mythtv/users/400151#400151

All this is with 1920x1080[at]50
But If I change resolution to 1360x720[at]60 - CPU load starts to as
expected (few %).

It is indeed related to GL painter as switching to Qt solves issue (and
of course no transitions, etc)

I'm trying justify - should I wait till devs resolve issue desribed in
http://www.gossamer-threads.com/lists/mythtv/users/400151#400151 or
rather my issue has other root causes...

My system is:
0.22 svn22720
nvidia 190.42
xorg srv 1.6.5
mesa 7.6
2.6.28.10

thx in advance for help

Attachments:

warpme.vcf (83 B)

mtdean at thirdcontact

Nov 7, 2009, 12:51 PM

Post #2 of 4 (246 views)
Permalink

Re: alphapulse caues 100% load but only on 1080p [In reply to]

On 11/07/2009 03:07 PM, Warpme wrote:
> I have issue with enabling alphapulse in themes - it causes 100% load
> on CPU one core (AMD X2 4400) .
>
> I'm wonder is my issue somehow related to
> http://www.gossamer-threads.com/lists/mythtv/users/400151#400151

It seems that's not an issue. We're still investigating.

http://www.gossamer-threads.com/lists/mythtv/users/406203#406203 and
http://www.gossamer-threads.com/lists/mythtv/users/406234#406234 seems
more important.

> All this is with 1920x1080[at]50
> But If I change resolution to 1360x720[at]60 - CPU load starts to as
> expected (few %).

Bad interaction with the nvidia sync to vblank setting?

Mike
_______________________________________________
mythtv-dev mailing list
mythtv-dev[at]mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev

warpme at o2

Nov 8, 2009, 3:05 AM

Post #3 of 4 (233 views)
Permalink

Re: alphapulse caues 100% load but only on 1080p [In reply to]

>Bad interaction with the nvidia sync to vblank setting?
>
>Mike

Mike,
Thx for replay.
Indeed it was my second guess (first was nvidia driver).
I already tried play with vsync options in myth and nvidia driver. So
far - no success....
If You need beta tester - I'll be happy to help

br

Attachments:

warpme.vcf (83 B)

warpme at o2

Nov 8, 2009, 8:19 AM

Post #4 of 4 (229 views)
Permalink

Re: alphapulse caues 100% load but only on 1080p [In reply to]

Mike,

I started to play with main window refresh timer.
Maybe issue is an result of vdpau design.
As for every screen refresh, repainting needs some time, I can imagine
main widow painting frequency level, where time gap between consecutive
paintings is lower that paint processing time. Easy way to verify this
is linear decreasing refresh rate - after some level issue should go away.

I made some tests:
for 1380x720, going from 70 to 45 solves issue (first try; probably
slightly higher is also OK)
for 1920x1080 I have 30=OK, 35=NOK

I made such tests on 8200 IGP with single-channel PC6400 memory.
As we can consider this hardware slowest available hardware with vdpau
(and with slowest processing time), changing mainwindow repaint time to
30 might be worth to consider.
Price for it are not so smooth transitions, but believe more coarse
transitions are less evil than high cpu usage.

br

Attachments:

warpme.vcf (83 B)

Index | Next | Previous | View Threaded

Interested in having your list archived? Contact lists@gossamer-threads.com