On Tue, Oct 15, 2013 at 03:46:08AM +0200, Bas Wijnen wrote: > On Sun, Oct 13, 2013 at 10:43:49AM +0100, Chris Wilson wrote: > > > > > My X server was crashing when playing video, and I wrote a patch to fix > > > > > it. Please find the background and the patch at > > > > > http://bugs.debian.org/724944 . > > > > Ok, I can see the allocation failure that leads to the crash: > > > > commit f9a18c9f38d09c145eb513ca989966dc135c1e9b > > Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Date: Sun Oct 13 10:36:35 2013 +0100 > > This does indeed stop the server from crashing, but actually makes the > problem worse: it used to play video for a few minutes and then crash > when trying. With my patch it would play video for a few minutes and > then present black screens when trying. With your patch, it presents > black screens from the start. Start of video, or beginning of X? I made two changes. The first to check for a failed GPU pixmap allocation during video playback and the second to check for a failed malloc during Screen initialisation. Neither should be likely. > I must say I'm not entirely sure if the backtrace I sent you is a > "typical" case; I managed to crash it sooner than usual, so perhaps it > wasn't the bug that I triggered before. It did stop the crashing > however. > > > However, that still leaveas the question as to how you ended up being > > unable to allocate bo... > > > > You can watch /sys/kernel/debug/dri/0/i915_gem_objects (or just use > > intel-gpu-overlay) and see if there is an object leak. > > I don't have enough knowledge about the internals to know how that > works. I can see the file if I mount the debugfs, but what am I looking > for? An increase in the number of total objects and allocated bytes. > I don't seem to have intel-gpu-overlay on my system; does it make sense > to install it? If so, where do I get it? It just presents the same information, so not really important if you are happy with catting the debugfs file. > While looking for it I did find and try intel-gpu-time, and noticed that > it always reports the gpu 100% busy, even when running intel-gpu-time > sleep 5 from a linux virtual terminal (so not even X is displayed). Is > that normal? Hmm, looks like it should report correctly on i915. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
