[uae] Re: How is the Mac OS X binary built?
- From: "Byron Q. Desnoyers Winmill" <byron@xxxxxxxxxxxxx>
- To: uae@xxxxxxxxxxxxx
- Date: Tue, 11 May 2004 09:45:56 -0400
Hopefully a quick question to start:
Is read_comm_pipe_pvoid_blocking() supposed to halt the execution
of filesys_thread() until there is something in the pipe? (If so,
it would appear to be the problem.)
On Mon, May 10, 2004 at 05:10:49PM -0500, Richard Drummond wrote:
> The performance of the thread layer is not significant to the
> performance of UAE.
This is because there is only n+1 threads, where n is the number
of hardfiles? If there are no hardfiles, which was the case when
I was using the SDL linked version, then there is no impact on
performance?
> In theory, SDL Video on OS X should be faster than X video. It
> would depend on the X server implementation, though. I haven't
> done any comparisons.
I haven't done a quantitative comparison, but it is very evident
that the redraws are slower in SDL. Whether this impacts on the
performance of the rest of the emulator is an open question. At
this point, I would like to setup filesystem support or hardfile
support for both the SDL and non-SDL case so that I have some
software to compare performance with.
> UAE performance in windowed mode using SDL on OS X is poor (due
> to the Quartz compositing layer).
Or perhaps the problem is with how SDL is being used. I would
imagine that the X version is still dealing with Quartz because I
am using Apple's X server (in rootless mode, though I doubt that
makes a difference). I have also used the SDL version of Kegs
(Apple IIgs emulator) without seeing a significant degredation of
performance.
Byron.
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