[Wayland-bugs] [Bug 86815] XWayland [weston 1.6.0] takes all CPU and is very slow on eee-pc

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86815

--- Comment #4 from Mildred Ki'Lya <mildred-bug.freedesktop at mildred.fr> ---
perf data gathered over the few seconds of running xterm inside weston is
available here:

http://mildredkilya.nfshost.com/perf-20141208.data.tar.bz2

The most time-consuming routines are:

Overhead Command  Shared Object     Symbol
28.77%   Xwayland i915_dri.so       [.] fetch_vector4
19.88%   swapper  [kernel.kallsyms] [k] intel_idle
15.43%   Xwayland i915_dri.so       [.] _mesa_execute_program
12.57%   Xwayland i915_dri.so       [.] store_vector4

Other routines are below 5%

I suspect some buffers are copied too many times around in the memory. Would
that be a problem in the intel driver of in Xwayland itself?

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