ajaj,
a 4.20-as linux kernelbe újabb biztonsági megerősítések kerülnek, amelyek főleg az Intel-es procikat érintik.
Ha ilyen lesz a végleges, akkor lesz még itt pánik a céges szervereknél.
pl. PHP - 30%-al lasabb a core i9 -eseken.
"The PHP performance is about 30% slower with Linux 4.20 on this Core i9 box. "
Bisected: The Unfortunate Reason Linux 4.20 Is Running Slower
https://www.phoronix.com/scan.php?page=article&item=linux-420-bisect&num=1
"This latest Linux 4.20 testing endeavor started out with seeing the Intel Core i9 performance pulling back in many synthetic and real-world tests. This ranged from Rodinia scientific OpenMP tests taking 30% longer to Java-based DaCapo tests taking up to ~50% more time to complete to code compilation tests taking measurably longer to lower PostgreSQL database server performance to longer Blender3D rendering times. That happened with a Core i9 7960X and Core i9 7980XE test systems while the AMD Threadripper 2990WX performance was unaffected by the Linux 4.20 upgrade.
...
Keep in mind with Linux 4.19 there is already the out-of-the-box mitigations against Spectre, Meltdown, Foreshadow, etc. This performance drop with Linux 4.20 is on top of all the previously outlined performance hits this year from the security hardening.
"
[ Szerkesztve ]
Mottó: "A verseny jó!"
