Re: [B2-devel] Problems with Speedometer 4.x & depth switching

[Brian J. <bjj...@us...>]

--- Gwenole Beauchesne <gb...@di...> wrote:
> 
> While performing a few tests with Speedometer 4.x, in "all tests"
> (cmd-'A') mode, the first graphics test will switch the depth and
> then restores it back for the disk and fpu performance test.
> 
> Then, "Benchmark mix" and "FPU benchmark" tests are run. Finally, in
> "QuickDraw tests" the depth is switched again, test is carried out,
> but when it's time to switch depth back to its original value, B2
> crashes with the following.
> 
> do_handle_screen_fault: unhandled address 0x8
> ...

I haven't seen that particular problem; running just the QuickDraw
section of the Speedometer tests seems to work fine on my box.  But I
do get a BadMatch error whenever I try to switch into monochrome mode:

  Gdk-ERROR **: BadMatch (invalid parameter attributes)
  serial 3461 error_code 8 request_code 1 minor_code 0

The other video modes seem to work just great, and B2 finds an
appropriate visual for all of them (my machine supports 8, 12, 15, and
24 plane visuals.)  They are even pretty fast, as reported by
Speedometer.  Although the basic CPU performance seems to have taken a
hit in recent weeks.  I should run some more performance profiles...

(BTW, we should be able to greatly increase blitter performance by
doing 64-bit loads and stores on machines which can do them directly.
Something to think about.)

One other oddity:  Maelstrom seems to run slowly, perhaps about half
the speed it should.  This is under either a 30hz or 60hz refresh
rate.  I think the latest round of changes to the video and timing
code introduced the problem; I believe it was fine (and even a bit too
fast) with the first iterations of the depth switching code.

						Brian

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