Linux 6.2's Call Depth Tracking Helps Recover Lost Performance On Intel Skylake CPUs

Written by Michael Larabel in Software on 28 December 2022 at 08:00 PM EST. Page 4 of 6. 21 Comments.
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake
Retbleed Call Depth Tracking Skylake

For various Linux server workloads on this Intel Xeon E3-1280 v5 system, running with Call Depth Tracking provided a performance boost (retbleed=stuff) over the stock mitigations but still there is heavy cost with the other CPU security mitigations involved.


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