pvr_wait_ready: timed out

Warmtoe · Post by **Warmtoe** » Wed Jul 09, 2003 4:37 pm

I'm getting 'pvr_wait_ready: timed out' on a regular basis in KOS-1.2.0 - anyone got experience of why? and how to fix it? I don't get this in KOS-1.1.8 which I was using previously.

BlackAura · Post by **BlackAura** » Wed Jul 09, 2003 7:56 pm

Weird...

I know that KOS has a different system for handling all the PVR pageflipping, and stuff like that. It uses vblank interrupts instead of... whatever it used before. That might be causing a few problems.

BlackAura · Post by **BlackAura** » Sat Jul 12, 2003 1:26 am

I can't actually get anything that uses the PVR working under KOS 1.2.0. This is really, really weird.

Rand Linden · Post by **Rand Linden** » Mon Jul 14, 2003 1:46 pm

I've never used KOS, but there *are* bugs in the PVR chipset -- IIRC, one of them will cause the interrupt that's supposed to fire at end of render to NEVER occur.

Rand.

Ian Micheal · Post by **Ian Micheal** » Mon Jul 14, 2003 9:19 pm

BlackAura wrote:I can't actually get anything that uses the PVR working under KOS 1.2.0. This is really, really weird.

I cant ether ive given up on it i emailed dan for help and a few others.

BlackAura · Post by **BlackAura** » Tue Jul 15, 2003 10:35 am

Got it working again. It seems to have some slightly different issues to last time. And I have no idea what I did differently, but it now works.

The pvr_wait_ready timeout could be caused by a bug in the PVR - if it's not firing the end of frame interrupt, pvr_wait_ready will just wait a while for it to happen, then abort.

ice88 - Is that happening all the time, or only under certain circumstances?

Warmtoe · Post by **Warmtoe** » Tue Jul 15, 2003 4:49 pm

Interestingly it only happens at a point after the main emulation engine has ended and I've returned control to my GUI - but as far as the PVR is concerned, nothing has changed... (I haven't re-initialised or anything)

It is odd - you get one good run of the emulation engine then *poof* timeouts.

I could try experimenting with it some more - interesting to hear about possible PVR bugs, but I'm more inclined to believe it's KOS or something I'm doing.

Rand Linden · Post by **Rand Linden** » Tue Jul 15, 2003 8:25 pm

I mentioned the PVR bug only because it's good to know that sometimes the issue isn't of your doing.

The major one that bit me hard is quite complicated to set up, and only occurs rarely -- but if you're not doing anything with general polygons per se, you'll not see it.

If you get a good run once and then subsequently it causes problems, I'd suspect something on your end.

Easiest thing to do is to record your input, and ensure that you play back everything *precisely* as you recorded it. Then you can easily reproduce the situation that causes the bug and track it down rapidly.

If you want a quick fix, though, you could always just reset the PVR and see if that solves it -- that would likely remove HW from the equation and leave you with whatever software setup you are/aren't doing correctly. Don't forget to clear interrupts, etc. etc. back to their reset state as well (otherwise, obviously, you'll end up servicing an interrupt that was from the *previous* frame and not the current one).

Best,

Rand.

BlackAura · Post by **BlackAura** » Tue Jul 15, 2003 11:59 pm

Well, there's three things that could be going wrong - the hardware, the PVR drivers in KOS, or the code that's using it. The KOS PVR drivers are fairly stable (probably not as good as Sega's, of course), but I think they still go a little weird from time to time. It's probably the code that's using it that's going wrong.

ice88 - It could be that you've not finished a frame at the end of the emulation, and pvr_wait_ready is waiting for the running frame to finish. I think that'd cause an assertion failure though (debug output appears, DC resets). Shutting down the PVR might actually help, but it's probably overkill. Is that bug present in the MAME 0.71 source you released, or is it in something else?

Viktor · Post by **Viktor** » Tue Jul 29, 2003 8:32 am

I get the same output everytime I start my game, but I have got it since 1.1.8 I think and it has never caused any problems and I have never looked into what it is.

/Viktor

BlackAura · Post by **BlackAura** » Tue Jul 29, 2003 9:58 am

Apparently, it's supposed to do that when you first start using it. Or at least, it is in KOS 1.2.0.

Artchi · Post by **Artchi** » Mon Aug 02, 2004 2:47 pm

I'm using KOS 1.1.9 and I get the same problem. I don't know if it's a realy problem but it's not nice.

Did somebody knows how I can disable the console output? Because if I release an end user version I don't want performance losts because of console outputs.

Strapping Scherzo · Post by **Strapping Scherzo** » Mon Aug 02, 2004 3:32 pm

I get the same pvr timeout right at the begining of things too. It doesn't seem to have any ill effects so I've never worried.

Artchi wrote:Did somebody knows how I can disable the console output? Because if I release an end user version I don't want performance losts because of console outputs.

KOS is able to figure out if you are using dc-load and pipes printf and the like to the console. When you release this on a CD, KOS will just throw any any stdout data and you will lose very little performance. But to be on the safe side, you might want to use a macro that calls printf for debugging, and when you are ready to release, define that macro to be empty.

Artchi · Post by **Artchi** » Mon Aug 02, 2004 3:36 pm

Thanks for this information.

About the time out: I don't get it only on startup. I get it in some situations at runtime. But if this uncontrolled outputs has no effects on end user release it is right for me. Thanks!

Artchi · Post by **Artchi** » Mon Aug 02, 2004 6:52 pm

I have located the time out: it will be showed if I don't end a scene before start it again.

Post by **Quzar** » Tue Aug 03, 2004 11:58 am

Working on a new Duck's Revenge ?

Artchi · Post by **Artchi** » Tue Aug 03, 2004 2:51 pm

Why do everybody remember Ducks Revenge?

It's 2 years ago.

But I can tell you: it's not a game!

typoEDR · Post by **typoEDR** » Tue Aug 03, 2004 3:03 pm

Artchi wrote:Why do everybody remember Ducks Revenge? It's 2 years ago.

But I can tell you: it's not a game!

Does it make games?

... or babies?