| 2012-09-11 16:09:31 |
Sam Spilsbury |
bug |
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added bug |
| 2012-09-11 16:09:36 |
Sam Spilsbury |
compiz: status |
New |
Confirmed |
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| 2012-09-11 16:09:38 |
Sam Spilsbury |
compiz: importance |
Undecided |
High |
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| 2012-09-11 16:09:40 |
Sam Spilsbury |
compiz: assignee |
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Sam Spilsbury (smspillaz) |
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| 2012-09-11 16:09:41 |
Sam Spilsbury |
compiz: milestone |
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0.9.8.4 |
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| 2012-09-11 16:14:16 |
Sam Spilsbury |
description |
Currently our usage of XSync is very inefficient, and on drivers which likely send the command queue over the protocol, this can kill performance.
Neutering XSync usage throughout compiz had the effect of lifting framerates from 30fps to 50fps. Obviously we require synchronous operation for certain things, for example:
1) Updating clients on new window positions and stack positions if they are reparented
2) Ensuring tear-free window pixmap updates
3) Ensuring tear-free damage repair.
Doing one XSync for every event handled had a negligible performance impact (0.001 of a frame). We should look into batching all of our synchronous operations with the server into this window and avoid synchronizing the server all the time. |
Currently our usage of XSync is very inefficient, and on drivers which likely send the command queue over the protocol, this can kill performance.
Neutering XSync usage throughout compiz had the effect of lifting framerates from 30fps to 50fps. Obviously we require synchronous operation for certain things, for example:
1) Updating clients on new window positions and stack positions if they are reparented
2) Ensuring tear-free window pixmap updates
3) Ensuring tear-free damage repair.
Doing one XSync for every event handled had a negligible performance impact (0.001 of a frame). We should look into batching all of our synchronous operations with the server into this window and avoid synchronizing the server all the time.
This also applies to other synchronous X11 operations such as XGetWindowAttributes, XGetWindowProperty and XQueryTree . |
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| 2012-09-12 02:12:32 |
Daniel van Vugt |
tags |
|
performance |
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| 2012-09-12 02:13:34 |
Daniel van Vugt |
compiz: status |
Confirmed |
Triaged |
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| 2012-09-17 02:13:30 |
Daniel van Vugt |
tags |
performance |
nvidia-is-slow performance |
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| 2012-09-19 01:26:01 |
Jacob Peddicord |
bug |
|
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added subscriber Jacob Peddicord |
| 2012-09-28 05:05:57 |
Daniel van Vugt |
compiz: milestone |
0.9.8.4 |
0.9.9.0 |
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| 2012-09-30 08:44:32 |
Uli Tillich |
bug |
|
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added subscriber Uli Tillich |
| 2012-09-30 17:01:31 |
Niclas Lockner |
bug |
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added subscriber Niclas L |
| 2012-10-03 14:15:27 |
Michal Hruby |
bug |
|
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added subscriber Michal Hruby |
| 2012-10-19 04:45:00 |
Fernando Correa Neto |
bug |
|
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added subscriber Fernando Correa Neto |
| 2012-10-30 08:17:43 |
Senno Kaasjager |
bug |
|
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added subscriber Senno Kaasjager |
| 2012-11-26 01:41:42 |
Daniel van Vugt |
summary |
[nvidia] XSync usage is a massive bottlenecking factor |
[nvidia] XSync usage is a massive bottlenecking factor (nvidia performance regression in Compiz 0.9.8+) |
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| 2012-11-27 01:59:07 |
Daniel van Vugt |
bug task added |
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compiz (Ubuntu) |
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| 2012-11-27 01:59:25 |
Daniel van Vugt |
compiz (Ubuntu): importance |
Undecided |
High |
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| 2012-11-27 01:59:25 |
Daniel van Vugt |
compiz (Ubuntu): status |
New |
Triaged |
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| 2012-11-27 01:59:38 |
Daniel van Vugt |
bug task added |
|
ubuntu-nexus7 |
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| 2012-11-27 05:08:05 |
Daniel van Vugt |
compiz: assignee |
Sam Spilsbury (smspillaz) |
Daniel van Vugt (vanvugt) |
|
| 2012-11-27 05:42:07 |
Daniel van Vugt |
compiz: status |
Triaged |
In Progress |
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| 2012-11-27 18:16:08 |
Sean Feole |
ubuntu-nexus7: status |
New |
Confirmed |
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| 2012-11-29 14:11:18 |
Anders Aagaard |
bug |
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added subscriber Anders Aagaard |
| 2012-11-29 19:35:48 |
Charon |
bug |
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added subscriber Charon |
| 2012-12-03 03:31:01 |
Alistair Buxton |
attachment added |
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XSync stub library for testing. https://bugs.launchpad.net/compiz/+bug/1049214/+attachment/3450221/+files/xsync.c |
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| 2012-12-03 16:07:16 |
Alistair Buxton |
attachment added |
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XSync as noop https://bugs.launchpad.net/compiz/+bug/1049214/+attachment/3450673/+files/xsync.c |
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| 2012-12-04 00:40:45 |
Brian Neal |
bug |
|
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added subscriber Brian Neal |
| 2012-12-05 09:39:25 |
Daniel van Vugt |
marked as duplicate |
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1027211 |
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