On Mon, Jun 02, 2014 at 02:18:14PM +0100, Sam Jansen wrote: > Hello intel-gfx, > I'm working on an application using VA-API for H264 encode+decode, and > JPEG decode on an Atom E3815. Unfortunately we've hit what I believe is a > kernel bug, and the "perf top" output is pointing at i915 DRM code. > After some amount of time running my application, the system will become > unresponsive (userspace applications get very little CPU, system CPU will > go up to 80+%), and sometimes the system will appear out of memory for a > period (the OOM killer is sometimes invoked), even though there is a lot > of free memory on the system. I noticed this first on kernel 3.14.5, so I > moved to "drm-intel-nightly", built on Friday (2014-05-30), from > [1]http://cgit.freedesktop.org/drm-intel. The results are the same. > Using "perf top", I have gathered the following traces showing high system > CPU at the time when the system was encountering this problem: It's a buffer leak in the userspace va-api application. The buffers appear as cached memory, they are not yet accounted against the applications that have a reference to them. Look at /sys/kernel/debug/dri/0/i915_gem_objects for a breakdown of users. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
