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

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  • #1

    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...

    Amazon Engineer's Patch For Flushing L1 Cache On Context Switching Revved - Phoronix
    http://www.phoronix.com/scan.php?page=news_item&px=L1d-Flush-On-Ctx-Switch-V2
    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite
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  • #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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