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Amazon Engineer's Patch For Flushing L1 Cache On Context Switching Revved

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  • Amazon Engineer's Patch For Flushing L1 Cache On Context Switching Revved

    Phoronix: Amazon Engineer's Patch For Flushing L1 Cache On Context Switching Revved

    Earlier this month there was the proposal by a Linux kernel engineer for Amazon to flush the L1 data cache on context switches as another safeguard against the ever increasing CPU vulnerabilities...

    http://www.phoronix.com/scan.php?pag...-Ctx-Switch-V2

  • #2
    Flushing cache sounds quite radical. I wonder how much it hurts performance. Any benchmarks or something?

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    • #3
      Originally posted by SystemCrasher View Post
      Flushing cache sounds quite radical. I wonder how much it hurts performance. Any benchmarks or something?
      In the original news about it, it runs a 1/10 of the perf without the mitigation.
      that is, if before you would reach 123 points in a hypothetical benchmark, with the mitigation your score would be 12.3

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