Nouveau Patches Under Review To Expose Global Performance Counters
Written by Michael Larabel in Nouveau on 7 June 2015 at 05:36 PM EDT. 5 Comments
NOUVEAU --
Samuel Pitoiset has continued on his quest of implementing NVIDIA hardware counters support and exposing it to user-space within the Nouveau open-source driver stack.

Samuel recently implemented NVPerfKit over Gallium3D and GL_AMD_performance_monitor support for reporting NVIDIA performance counters via this driver. Up to now the performance counters exposed to user-space via these methods have been the NVIDIA MP counters while Pitoiset now has patches under review for the global performance counters.


A set of 20 patches published today for commenting expose the global performance counters (PCOUNTERs) to user-space via the nvif interface. Initially the PCOUNTERs are exposed for the NV50 class hardware while it will be similar to implement for more-modern NVIDIA Fermi and Kepler families too. Those Kepler/Fermi patches are expected once these initial 20 patches have been reviewed.

More info on the work via this patch series. The work might be coming in too late to be squeezed into DRM-Next for Linux 4.2, but otherwise then it's some Linux 4.3 work to look forward to later in the year.
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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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