Bug 99312

If you have not already done so, try disabling the watchdog timer:


MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (default 10000 = 10 seconds, 0 = disable)");
module_param_named(lockup_timeout, radeon_lockup_timeout, int, 0444);

As part of HSA/ROC development we dropped the priority of compute work relative to graphics which improved interactivity and *almost* eliminated timeouts without having to disable the timer  - when I get back in the office I'll dig up the changes. In the meantime, I think disabling the timer will do what you need although you will still have sluggish graphics while long-running kernels are active.

Lowering the priority of compute waves across the board won't be a fully general solution because there are going to be some cases (eg Valve's recent work with using high priority compute to improve VR smoothness) where compute will need to be *higher* priority than graphics but it should cover most cases other than "simultaneously running GROMACS and VR".

(In reply to John Bridgman from comment #1)
> If you have not already done so, try disabling the watchdog timer:
> 
> 
> MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (default 10000 =
> 10 seconds, 0 = disable)");
> module_param_named(lockup_timeout, radeon_lockup_timeout, int, 0444);
> 

Yup, that works around the problem.

> As part of HSA/ROC development we dropped the priority of compute work
> relative to graphics which improved interactivity and *almost* eliminated
> timeouts without having to disable the timer  - when I get back in the
> office I'll dig up the changes. In the meantime, I think disabling the timer
> will do what you need although you will still have sluggish graphics while
> long-running kernels are active.
> 

Eager to hear the details.

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