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Linux 4.20 is Running Slower Than 4.19 On Intel CPUs (phoronix.com)

Freshly Exhumed writes: An intentional kernel change in Linux kernel 4.20 for enhanced Spectre mitigation is unfortunately causing Intel Linux performance to be much slower than with 4.19. That change is 'STIBP' (Single Thread Indirect Branch Predictors), which allows for preventing cross-hyperthread control of decisions that are made by indirect branch predictors. It affects Intel systems that have up-to-date microcode and CPU Hyper Threading enabled. Phoronix gives the evidence.

3 of 137 comments (clear)

  1. Give it a break by medv4380 · · Score: 5, Funny

    It's just high.

  2. Four Twenty? by Esion+Modnar · · Score: 5, Funny

    There's a joke here somewhere. If I weren't so stoned...

    --

    They say the first thing to go is your penis. Well, it's either that or your brain. I forget which...
  3. Re:Intel? by F.Ultra · · Score: 4, Funny

    They usually call from India and want you to install some software on your computer since it has reported that it's being hacked. At least that is what they always say on the phone "Hello I'm calling from Windows" so that must be it.