Some Ryzen Linux Users Are Facing Issues With Heavy Compilation Loads

Written by Michael Larabel in AMD on 2 June 2017 at 04:09 PM EDT. 149 Comments
I haven't encountered this issue myself on any of my Ryzen Linux boxes, but it seems there are a number of Ryzen Linux users who are facing segmentation faults and sometimes crashes when running concurrent compilation loads on these Zen CPUs.

A Phoronix reader pointed out some of the resources for Ryzen Linux customers facing problems namely when running heavy compilation tasks, like on Arch and Gentoo. AMD hasn't yet found the root cause of this issue, but given the spread of users affected, appears to be related to the processor itself.

Those interested in learning more about these Ryzen compilation issues can find a number of open threads on the matter such as on the Gentoo forums, AMD Community, as well as some entries via this Google Doc tracking Gentoo users having the problem.

AMD is expected to update their community thread when a solution is found. Some workarounds include fiddling with Load Line Calibration (LLC) from the BIOS and some users have found success if disabling the SMT functionality while others are still encountering the problems even if they turn off SMT on their Ryzen 7 CPUs. The issue is happening on multiple versions of GCC but I haven't seen any reports when using LLVM/Clang or alternative compilers.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 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 automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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