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AMD users should immediately switch to the latest Linux 5.11 kernel


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The latest release of the Linux kernel features some impressive performance enhancements for AMD hardware. 

 

Released over the valentine’s day weekend, Linux kernel 5.11 fixed a major performance regression that impacted the AMD Zen architecture. Thanks to the fix, Zen-based processors such as Ryzen and EPYC have been benchmarked as being faster out of the box than on previous kernels. Also debuting in the release is support for AMD “Van Gogh” and “Dimgrey Cavefish” GPUs.

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CPU: AMD 5950X (4.7Ghz CCD0 / 4.5Ghz CCD1)
MOTHERBOARD: ASRock X570 Aqua
RAM: TeamGroup T-FORCE XTREEM 4000Mhz 64GB (3800Mhz CL16)
GPU: EVGA 3090 FTW Ultra Gaming
SSD/NVME: Sabrent Rocket 4 Pro (2x 2TB, RAID 0)
PSU: EVGA Supernova T2 1600Watt
SOUNDCARD: Sound blaster Creative AE-9
CASE: be quiet Dark Base Pro 900 Rev 2
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CPU: AMD RX-427BB
RAM: 16GB Corsair 1600MHZ DDR3L
SSD/NVME: WD Blue 250GB M.2 SATA SSD
NETWORK: Intel I350 -T4
CASE: HP Thin Client T730
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CPU: 2 x Xeon|E5-2696-V4 (44C/88T)
RAM: 128GB|16 x 8GB - DDR4 2400MHz (2Rx8)
MOTHERBOARD: HP Z840|Intel C612 Chipset
GPU: Nvidia Quadro P2200
HDD: 4x 16TB Toshiba MG08ACA16TE Enterprise
SSD/NVME: Intel 512GB 670p NVMe
SSD/NVME 2: Samsung 1TB 980 NVMe
SSD/NVME 3: 2x Seagate FireCuda 1TB SSD's
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Here is the link to the Phoronix article where the info came from. https://www.phoronix.com/scan.php?page=news_item&px=AMD-Sched-Invariance-Fix-Merged and some benchmarks: https://www.phoronix.com/scan.php?page=article&item=linux511-regress-over&num=1

 

It should be noted that many users would not have been affected by the performance regression.  I have always just used the performance governor on my AMD machines.  The schedutil governor has pretty much been a hot mess since it was added to the kernel.  The ondemand and performance governors still outperform schedutil. There are also still bugs with scedutil and Zen 3 CPUs that probably won't land in the kernel for a few more weeks.  

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