https://bugs.freedesktop.org/show_bug.cgi?id=49603 --- Comment #2 from Simon Farnsworth <simon.farnsworth@xxxxxxxxxxxx> 2012-05-08 03:43:29 PDT --- Created attachment 61213 --> https://bugs.freedesktop.org/attachment.cgi?id=61213 Different route to spinning in preference to in-kernel waits for short fences If Michel's patch helps, would you mind trying this patch instead? The difference is that Michel's patch doesn't have the early abort if the kernel says the GPU has completed the command batch we're waiting for, while this patch does. Both patches will cause Mesa to spin 256 times before it goes to sleep waiting for the GPU to have completed a command batch. For background, I'm working with the Fusion E-350 chip; I'm thus CPU-limited. The goal of the original patch is twofold: 1) Don't spin on CPU when you're going to have to wait for a long time for the GPU to finish work - go to sleep waiting for the GPU to complete. 2) Don't keep spinning when the GPU has completed the command batch that includes the fence - it's not going to change state again, absent bugs, so we should cease spinning now. If Michel's patch helps, and this patch does not, it indicates that there are problems with attempting to wait in the kernel. If neither patch helps, we have a deeper issue to diagnose. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
