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November 16, 2018 10:05 pm
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/-KcyxVVTruc/linux-420-is-running-slower-than-419-on-intel-cpus
Linux 4.20 is Running Slower Than 4.19 On Intel CPUs
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.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/-KcyxVVTruc/linux-420-is-running-slower-than-419-on-intel-cpus
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