[9fans] Inferno slow on Plan 9?

[9fans] Inferno slow on Plan 9?

[Venkatesh Srinivas]

Hi,

I'm running Plan 9 on a machine with a GeForce2 MX200. I've tried to
run Inferno in p9, but anything graphical draws painfully slowly
(several seconds to paint the white rectangle while Charon is
starting).

Is there any reason this might be happening? If its related to
Inferno's /dev/draw, is there any way I can import /dev/draw from P9
and use it in Inferno? Would that be faster?

Thanks,
-- vs

Re: [9fans] Inferno slow on Plan 9?

[erik quanstrom]

> Is there any reason this might be happening? If its related to
> Inferno's /dev/draw, is there any way I can import /dev/draw from P9
> and use it in Inferno? Would that be faster?

does the PAT register patch (/n/sources/patch/pat) make any difference?

- erik

Re: [9fans] Inferno slow on Plan 9?

[Charles Forsyth]

>anything graphical draws painfully slowly
>(several seconds to paint the white rectangle while Charon is starting).

that isn't normal, except when using it through drawterm.
it's even fine for me in 9vx on Linux.

Re: [9fans] Inferno slow on Plan 9?

[Venkatesh Srinivas]

The CPU doesn't support PATs, sorry.

It does have MTRR support though, wasn't there a patch to support
Write-combining for the framebuffer region using them instead?

FWIW, native graphics applications (including Hyperglenda) are very fast...

-- vs

Re: [9fans] Inferno slow on Plan 9?

[erik quanstrom]

> The CPU doesn't support PATs, sorry.
>
> It does have MTRR support though, wasn't there a patch to support
> Write-combining for the framebuffer region using them instead?
>
> FWIW, native graphics applications (including Hyperglenda) are very fast...

if the slowdown is caused by reading the framebuffer, than the patch wouldn't
help anyway.  reading the frame buffer on certain nvidia cards (for example,
mine) can be astoundingly slow.

- erik

Re: [9fans] Inferno slow on Plan 9?

[Charles Forsyth]

> FWIW, native graphics applications (including Hyperglenda) are very fast...

hmm. Inferno is a native graphics application.