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Disabling Intel Graphics Security Mitigations Can Boost GPU Compute Performance By 20%
While not talked about as much as the Intel CPU security mitigations, Intel graphics security mitigations have added up over time that if disabling Intel graphics security mitigations for their GPU compute stack for OpenCL and Level Zero can yield a 20% performance boost
This Ubuntu Launchpad bug report for the Intel Compute Runtime notes the key takeaways:" * Users can expect up to 20% performance improvement" ... [ Where problems could occur ] * As we are proposing to eliminate a vulnerability mitigation, there is the possibility that this would open up an unknown avenue for attack. That Launchpad ticket also notes:"After discussion between Intel and Canonical’s security teams, we are in agreement that Spectre no longer needs to be mitigated for the GPU at the Compute Runtime level. For these reasons, we feel that Spectre mitigations in Compute Runtime no longer offer enough security impact to justify the current performance tradeoff.
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