Movim • GCC Compiler Adds Software Workaround To Avoid Intel Downfall Performance Hit

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GCC Compiler Adds Software Workaround To Avoid Intel Downfall Performance Hit

news.movim.eu / Phoronix • 16 August, 2023

With the Intel Downfall vulnerability made public last week (also known as GDS - "Gather Data Sampling") there can be a sizable hit to AVX workloads making use of the GATHER instructions. For helping to lower the impact of Downfall/GDS on mitigated systems, Intel has made a change to the GNU Compiler Collection to disable GATHER generation in vectorization for Intel CPU families affected by this vulnerability...