Going Over The Graphics Execution Manager
Written by Michael Larabel in Intel on 31 October 2012 at 12:46 PM EDT. Add A Comment
For those not yet familiar with GEM, the Graphics Execution Manager, that Intel's open-source Linux graphics driver uses for in-kernel memory management, here's a brief guide.

While GEM has been in use by the Intel Linux graphics driver for about four years after the Intel developers no longer wished to pursue using TTM within their DRM driver, Daniel Vetter just wrote today a "i915/GEM Crashcourse."
GEM essentially deals with graphics buffer objects (which can contain textures, renderbuffers, shaders or all kinds of other state objects and data used by the gpu) and how to run a given workload on the gpu, commonly called command submission (CS), but in the i915.ko driver done with the execbuf ioctl (since the gpu commands themselves reside in a buffer object on Intel hardware).
Read the rest on Daniel's blog.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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