GNU bug report logs - #28695
26.0.60; Rendering lag spikes caused by double-buffering on Linux

Previous Next

Full log

View this message in rfc822 format

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 28695 <at> debbugs.gnu.org, bryan <at> bryan.sh, npostavs <at> users.sourceforge.net
Subject: bug#28695: 26.0.60; Rendering lag spikes caused by double-buffering on Linux
Date: Fri, 27 Oct 2017 02:19:28 +0300

[Message part 1 (text/plain, inline)]

On 10/16/17 5:30 AM, Eli Zaretskii wrote:
>>     Children  Self   Comma  Shared Object     Symbol
>>     0,03%     0,03%  emacs  libXext.so.6.4.0  [.] XdbeSwapBuffers
>>     0,00%     0,00%  emacs  emacs             [.] XdbeSwapBuffers <at> plt
> 
> Hmm... so do you see any difference between these 2 scenarios in other
> parts of the profiles?

It's really hard for me to tell. Now, I've re-ran the experiment again 
(last time I did it with ag, now with rg) and I'm attaching the 
"unexpanded" views of the graphs in all cases. 1 and 11 were with a 
small window, and 2 and 22 were with a fullscreen one.

The search results for XdbeSwapBuffers were really similar to the above, 
so I'm not including that.

Don't really see a significant difference. If I had to guess, the 
slowdown maybe has to do with Xorg not being able to keep up, but, like, 
in an asynchronous fashion.

[perf.txt.1 (text/plain, attachment)]

[perf.txt.2 (text/plain, attachment)]

[perf.txt.11 (text/plain, attachment)]

[perf.txt.22 (text/plain, attachment)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.