https://bugs.freedesktop.org/show_bug.cgi?id=28511
Summary: Bitmap font embedded in TTF causes massive X server
CPU usage
Product: xorg
Version: git
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Steps to reproduce:
1. Install the Anonymous Pro font (yum install msimonson-anonymouspro-fonts on
F13, or download+install manually from
http://www.ms-studio.com/FontSales/anonymouspro.html )
2. Set GNOME terminal font to Anonymous Pro, size 8pt (assuming X server DPI is
set to 96)
3. In a GNOME-terminal window, run a program that spews a lot of text; an
example Python script which will do the job is available at
http://pastie.org/private/dmzqrytvjdhle597muzufw
Expected result:
Spewing dozens of lines of text per second should causes barely any noticeable
extra CPU overhead.
Actual result:
My X server's CPU usage jumps to well over 70% and according to sysprof most of
my CPU time is being spent inside drm_gem_object_alloc, which is being called
by radeon_gem_object_create.
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