Slashdot Mirror

← Back to Stories (view on slashdot.org)

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

Posted by msmash on from the closer-look dept.

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.

2 of 137 comments (clear)

  1. Handi-capables strike again! by Anonymous Coward · · Score: 0, Offtopic

    This is what Linux gets for pushing a CoC. Linus' kool aid drinking has finally proven his lack of judgement in a way BitKeeper, the scsi subsystems, and assigning Greg KH as stable maintainer haven't.

  2. Re:IMPERSONATING ME AGAIN? apk by magarity · · Score: 1, Offtopic

    Seriously, you might think you're so cool by annoying the other users but I for one am concerned for your health. Do you need medication or some other kind of help? It isn't normal to paste that stuff into every article.