[haiku-bugs] Re: [Haiku] #8007: [app_server] fully unresponsive when resizing window of big textfile
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Wed, 05 Oct 2011 15:58:38 -0000
#8007: [app_server] fully unresponsive when resizing window of big textfile
----------------------------------+----------------------------
Reporter: ttcoder | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Servers/app_server | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
----------------------------------+----------------------------
Comment (by ttcoder):
Steps:
You may for instance...
- wget ftp://ftp.fu-berlin.de/misc/movies/database/costume-
designers.list.gz
- expand the tarball
- double click the .list textfile (it opens in a couple seconds)
- resize the window (this step is only necessary the first time you run
the test; next time StyledEdit will remember its size and bring the system
to its knees without further ado).
Expected behavior:
- the OS should stay responsive, or at least sluggish (a la Windows) but
not completely ''frozen'', while StyledEdit recalculates its Frame() and
layout.
Actual Behavior:
- the mouse pointer stops moving completely for dozens of seconds.
- keyboard unresponsive as well.
- the screen itself stops refreshing.
Basically the whole computer is frozen for up to a minute if the file is
big enough.
Hardware:
This is an AthlonXP 1800+ with 512 MB of RAM. So only '''one "core" '''
(or "CPU") in case it matters (and maybe it does, seeing the experiences
in #7882 ? there seems to be an emerging pattern...)
To be clear, there might be misbehaving (or at least unoptimized) code in
StyledEditwindow::FrameResize(), who knows.. But the app_server really
shouldn't be vulnerable to that, even from B_DISPLAY_PRIORITY threads! So
I'm filing this against app_server initially (I have no idea if this
problem goes deeper, into actual management of threads in the kernel?).
To reproduce this bug, those with dual-core systems might want to open
Pulse and disable one of the cores I guess.
This is with r42760 .
P.S. I swear I was not working on extending my torture tests in #7882 :-)
--
Ticket URL: <http://dev.haiku-os.org/ticket/8007#comment:1>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.
Other related posts:
