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In case someone from AMD is reading this: guys, you need to fix stability issues on Linux, or your Epyc is DOA. People are having some serious lock-up trouble w

by 0xbear 9y ago

In case someone from AMD is reading this: guys, you need to fix stability issues on Linux, or your Epyc is DOA. People are having some serious lock-up trouble with Ryzen, even with the latest AGESA updates and kernels. This is the only issue preventing me from recommending to purchase threadripper workstations at work. We do need that pcie bandwidth for GPU, but we absolutely can't tolerate instability.

foepys 9y ago
Epyc has another stepping than Ryzen and, as far as I know, nobody could reproduce the "kill-ryzen" SEGFAULT on Epyc or Threadripper.
- 0xbear 9y ago
  I sure hope so, but given the epic fail of Ryzen, I'm going to wait for others to beta test it for me, and/or for some sort of explanation and fix from AMD.
  - letsgetphysITal 9y ago
    Well then you likely won't get the information you need as quickly as you need it. Buy one, test it in your environment, file bug reports if you come across any. You don't need to replace your entire fleet in one go; Plan a phased rollout, starting with one workstation running the most aggressive of your workloads.
randallsquared 9y ago
I had a lot of issues: obviously Ubuntu 17.04 doesn't boot, but Fedora 26 crashed a lot seemingly no matter what I changed. Windows 10 also crashed fairly often. I was about say that it wasn't as bad as F26, but given the automatic restart on crash that I kept seeing, it might have been as bad. Currently using Arch/4.12-zen/nvidia with Gigabyte Gaming K5/Ryzen 7 1700X/GTX1060 and since kicking nouveau out, I have had no crashes at all. I am hopeful that this means my Ryzen woes are over.
- sebow 9y ago
  The nouveau drivers are so bad,might only be about nvidia or nvidia & ryzen combo on linux, i know for sure that with an antique AMD card i never had these problems. On my 1800x and GTX 760(waiting for vega™) i got similar results, upgrading your kernel also makes you re-install the video driver.(or at least it did for me). I'm not sure about why your w10 crashed, i never had problems on windows besides undervolting while also increasing the CPU freq.(Which was expected)
iOsiris 9y ago
https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Segv-Response https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Se... "AMD was also able to confirm this issue is not present with AMD Epyc or AMD ThreadRipper processors".
DonPellegrino 9y ago
AMD has confirmed that they've been able to replicate the Linux bug and that it only happens on Ryzen, ThreadRipper and Epyc do not suffer from that issue.
- 0xbear 9y ago
  They also have also inadvertently confirmed that their Linux testing efforts are lacking. Which just blows my mind TBH, because they're also in the server market, dominated completely by Linux.

by 0xbear 9y ago

foepys 9y ago

Epyc has another stepping than Ryzen and, as far as I know, nobody could reproduce the "kill-ryzen" SEGFAULT on Epyc or Threadripper.

0xbear 9y ago
I sure hope so, but given the epic fail of Ryzen, I'm going to wait for others to beta test it for me, and/or for some sort of explanation and fix from AMD.
- letsgetphysITal 9y ago
  Well then you likely won't get the information you need as quickly as you need it. Buy one, test it in your environment, file bug reports if you come across any. You don't need to replace your entire fleet in one go; Plan a phased rollout, starting with one workstation running the most aggressive of your workloads.

randallsquared 9y ago

I had a lot of issues: obviously Ubuntu 17.04 doesn't boot, but Fedora 26 crashed a lot seemingly no matter what I changed. Windows 10 also crashed fairly often. I was about say that it wasn't as bad as F26, but given the automatic restart on crash that I kept seeing, it might have been as bad. Currently using Arch/4.12-zen/nvidia with Gigabyte Gaming K5/Ryzen 7 1700X/GTX1060 and since kicking nouveau out, I have had no crashes at all. I am hopeful that this means my Ryzen woes are over.

sebow 9y ago
The nouveau drivers are so bad,might only be about nvidia or nvidia & ryzen combo on linux, i know for sure that with an antique AMD card i never had these problems. On my 1800x and GTX 760(waiting for vega™) i got similar results, upgrading your kernel also makes you re-install the video driver.(or at least it did for me). I'm not sure about why your w10 crashed, i never had problems on windows besides undervolting while also increasing the CPU freq.(Which was expected)

iOsiris 9y ago

https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Segv-Response https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Se... "AMD was also able to confirm this issue is not present with AMD Epyc or AMD ThreadRipper processors".

DonPellegrino 9y ago

AMD has confirmed that they've been able to replicate the Linux bug and that it only happens on Ryzen, ThreadRipper and Epyc do not suffer from that issue.

0xbear 9y ago
They also have also inadvertently confirmed that their Linux testing efforts are lacking. Which just blows my mind TBH, because they're also in the server market, dominated completely by Linux.