Lmst

The bane of the Steam Deck is #UnrealEngine5.

#Zen2 and #RDNA2 are power efficient but not enough to move games that are badly optimized as UE5, like #Borderlands4.

#UE5 makes the case for powerful handleds, but at that point, why not just get a laptop that will be a better value? Even the cheapest RTX will beat any handled any time.

#Videogames #Gaming #Games #Laptop #Hardware #Handleds #Handled #SteamDeck #Steam #Valve #Laptops #UnrealEngine #EpicGames #GameDevelopment

Does anyone know more about the Linux scheduler? Like, how does it behave when some tasks are pinned to certain cores while others are not? Does other tasks naturally tend to stay away from those "reserved" cores?

I would appreciate any resources on this topic. It's interesting.

3/3

#Hardware #CPU #AMD #Zen2 #Ryzen #Linux #Performance #Gaming #LinuxGaming

I always wondered why my 3900X with 64 MB of cache performs so much worse than a 5700X3D with 96 MB of cache. It's only ⅓ more cache, after all.

Well, `lstopo` had the answer. The cache is split into 4 chunks (CCXs), so a single thread only really has 16 MB of cache available.

I actually managed to gain a few FPS through isolating a group of cores that share an L3 cache by manually setting CPU affinity.

1/3

#Hardware #CPU #AMD #Zen2 #Ryzen #Linux #Performance #Gaming #LinuxGaming

Screenshot of the "lstopo" utility. It displays a block diagram of the CPU topology. There are various rectangles of slightly different colour.

There are 12 cores with 2 threads each, but the cores are organised in 4 chunks of 3. Each chunk shares 16 MB of L3 cache.

@SkyeBlau #OnceHuman is an interesting game. I like that it is #FreeToPlay.

I can also confirm it runs on #Linux and fairly well on an #AMD #Zen2 #Ryzen 5700u. Fairly well is due to #FSR3 and #FrameGeneration

#AMD discloses slew of high severity #security #vulnerabilities for #Zen systems, from the original Zen chips to the latest #Zen4 #CPU, that attacks #BIOS chips, we finally have a #Zenbleed fix. AMD is patching the vulnerabilities through new versions of #AGESA, for #Zen2-based chips, in particular, many of these new AGESAs also patch Zenbleed, including #Epyc #Server chips https://bit.ly/3I1JKds https://www.tomshardware.com/pc-components/cpus/amd-discloses-slew-of-high-severity-security-vulnerabilities-for-zen-chips-that-attack-bios-chips-updates-aim-to-patch-bugs-finally-fix-zenbleed

💡 AMD annuncia nuovi processori per il settore automotive
AMD entra decisamente nel settore automotive con due nuovi processori, il primo per la guida autonoma ed altre attività logiche e il secondo per l'infotainment.
https://gomoot.com/amd-annuncia-nuovi-processori-per-il-settore-automotive

#7nm #amd #android #ia #ai #automotive #BlackBerry #Cognata #ECARX #FPGA #LiDAR #Linux #RadeonVega7 #RyzenEmbedded #V2000A #VersalAIEdgeXA #x86 #Zen2

#AMD #Ryzen #Threadripper PRO# 7975WX #CPU Spotted: 32 #Zen4 Cores, 128 MB of L3 cache, and 32 MB of L2 cache. The CPU is expected to feature a TDP of 350W and the base clock speed is reported around 4.0 GHz. And Offer a Huge Performance Jump: 7975WX CPU can be as much as two times faster than its #3970X #Zen2 predecessor and as little as 40% faster
https://wccftech.com/amd-ryzen-threadripper-pro-7975wx-cpu-spotted-32-zen-4-cores-benchmarks/

#AMD #Zen2 CPUs were found to be vulnerable to a speculative execution bug called #Zenbleed that allows attackers to leak credentials and break encryption.

The good news is that AMD has issued a microcode update, the bad news is that it's only available for their #Epyc 7002 line. The fix for consumer & workstation Ryzen products containing the Zen2 cores will need to wait for a couple months for the fix.

#infosec #cybersecurity #firmware #HardwareBug

https://arstechnica.com/information-technology/2023/07/encryption-breaking-password-leaking-bug-in-many-amd-cpus-could-take-months-to-fix/

Zenbleed: Sicherheitslücke gefährdet Zen-2-Architektur von AMD https://www.computerbase.de/2023-07/zenbleed-sicherheitsluecke-gefaehrdet-zen-2-architektur-von-amd/ #AMD #Zen2 #Sicherheitslücke #Zenbleed

Google Information Security researcher Tavis Ormandy has identified the vulnerability called Zenbleed, present in the entire line of AMD Zen 2 processors, which includes Ryzen 3000, Ryzen 4000, Ryzen 5000, Ryzen 7020, Ryzen Pro 3000 and Ryzen Pro 4000 models.

#AMD #vulnerability #Ryzen #Zen2 #CyberSecurity #data #Zenbleed

https://cybersec84.wordpress.com/2023/07/25/amd-issues-security-advisory-for-zen-2-processors-with-critical-vulnerability/

AMD has released microcode patches to protect Epyc 7002 Rome server chips against the newly discovered Zenbleed vulnerability, but patches for consumer chips with Zen 2 CPU cores won't be ready until later this year. https://www.tomshardware.com/news/zenbleed-bug-allows-data-theft-from-amds-zen-2-processors-patches-released

#AMD #Zen2 #Zenbleed #security

@taviso Well done with the Zenbleed discovery. It seems that AMD only patched the EPYC processor series. Other Zen2 processors still seems fully vulnerable.

In fact, I think AMD didn't want to announce this early at all. BIOS manufacturers don't even have BIOS firmware updates to protect users. Oops!?

#infosec #amd #zen2 #zenbleed #bios #vulnerable

So found a possible new contender for the new laptop with AMD #Ryzen #Zen2 quest;
MSI Bravo 15 with 4800H and RX5000 which fits the bill but a tad more money than I'm budgeting for, Linux ootb may be an issue?
https://www.msi.com/Laptop/Bravo-15-A4DX