[haiku-bugs] Re: [Haiku] #8007: [app_server] fully unresponsive when resizing window of big textfile
- From: "jua" <trac@xxxxxxxxxxxx>
- Date: Fri, 05 Oct 2012 21:11:49 -0000
#8007: [app_server] fully unresponsive when resizing window of big textfile
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Reporter: ttcoder | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking: 7882, 8136
Has a Patch: 1 | Platform: All
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Comment (by jua):
Sooo, after a few months break, here is a new version of the patch
including the discussed changes.
This time I did a bit more testing to evaluate performance. I used
SPLASH-2 (based on pthreads), a suite of concurrency benchmarks to test
how the un-inlining of locking and the additional code affects
performance. The suite needs only minimal changes to compile and work on
Haiku. Here are some results of original Haiku vs Haiku with this patch,
once with KDEBUG and once without:
Note: all values are time, i.e. lower is better!
http://www.orangejua.de/haiku/original_vs_patched_kdebug_v2.png
http://www.orangejua.de/haiku/original_vs_patched_v2.png
All in all, the performance hit in these benchmarks is not that big, even
without KDEBUG.
And it does pay off... the SPLASH-2 benchmarks also turn out to be a great
testcase for the freezing issues described in this ticket, even on multi-
processor machines. Simply set them to use the number of CPUs/cores your
machine has, and most of them will cause intense freezing on an unpatched
Haiku, no more mouse movement, playing video just freezes, etc. With this
patch applied however, no freezing anymore. All cores go to 100% CPU usage
-- but still the cursor moves and the movie doesn't drop any frames (or at
least none that I could see :) like it should be.
Hope I got the coding style right this time!
--
Ticket URL: <http://dev.haiku-os.org/ticket/8007#comment:62>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.
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