[Bug 34929] [r300g] slowdown with r300g threading

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Mar 4 02:34:25 PST 2011


--- Comment #6 from Fabio Pedretti <fabio.ped at libero.it> 2011-03-04 02:34:24 PST ---
(In reply to comment #5)
> Come on, you cannot decently compare performance when running under GDB...
> GDB has its own thread overhead

The point is that on my system, for whatever reason, r300g threading make every
application I tried slower (or at least not faster), with or without gdb.
Running it under gdb amplifies the problem and may be a useful test case to
further debug the problem to who, instead, got the speedups, possibly because
on his system the thread management overhead is less than the benefit from
using two CPU cores. Maybe it's possible to leave the thread always open
without opening/exiting it many times.

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