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AMD fanboy checking in :) One of the good OCaml folks over at Jane Street just recently found a bug that crashes systems with Hyperthreading enabled on both In

AMD fanboy checking in :) One of the good OCaml folks over at Jane Street just recently found a bug that crashes systems with Hyperthreading enabled on both Intel Skylake and Kaby Lake as well – just saying: https://news.ycombinator.com/item?id=14630183 https://news.ycombinator.com/item?id=14630183 Those hardware bugs are all very disheartening from software folks perspective, doesn't matter which company it pertains... "microcode update" rollseyes Edit: dear AMD haters, keep the downvotes coming B-) it has only been since May that the first fixes have been rolled out for Skylake / Kaby Lake – and yes, naturally AMD should "fix" (rollseyesagain) their respective issues ASAP but just saying... https://arstechnica.com/information-technology/2017/06/skylake-kaby-lake-chips-have-a-crash-bug-with-hyperthreading-enabled/ https://arstechnica.com/information-technology/2017/06/skyla...

ivank 9y ago
Compare what you can get today: an Intel CPU without a hyperthreading problem (fixed in a microcode update months back) or an AMD CPU with a hyperthreading problem (being investigated by AMD for 3 months). Edit: thanks, s/unacknowledged/being investigated/
- vvanders 9y ago
  If I remember the story right it took Intel ~8months to accept that it was an issue and fix it.
  - ivank 9y ago
    Would you buy a pile of Ryzen CPUs under the assumption that AMD will be able to fix it properly with an update (without e.g. disabling HT or making performance worse as they did for their TLB fix in 2007)? If they take another 2 months, you're out on your return window.
- blattimwind 9y ago
  That bug was acknowledged a while ago.
- dis-sys 9y ago
  to be fair, that Intel hyperthreading issue took Intel 5 months to investigate and fix.
shmerl 9y ago
I bought my Ryzen CPU already, and going to build a new computer shortly. So I'm literally waiting for that fix.
- musha68k 9y ago
  That sucks indeed :( I just wanted to say that many recent CPUs seem to be rushed efforts - be it Intel or AMD.
  - api 9y ago
    AMD has pulled up to match or beat Intel, so both companies were absolutely rushing things out. It will settle down and these bugs will get fixed by microcode updates.
  - AlphaSite 9y ago
    They’re not rushed, you just cannot knock out every bug in a new piece of software or hardware in one go. It is not possible (without some incredibly slow and 3xpensove processes).
- gfody 9y ago
  Disable hyperthreading, it's overrated anyways
  - shmerl 9y ago
    Is it? I know there are workloads when it actually can hurt performance, but are they more common than ones when it helps?
    - Symmetry 9y ago
      Here's Anandtech's recent SPEC benchmark deltas on hypertheading. http://www.anandtech.com/show/11544/intel-skylake-ep-vs-amd-epyc-7000-cpu-battle-of-the-decade/15 http://www.anandtech.com/show/11544/intel-skylake-ep-vs-amd-...

ivank 9y ago

Compare what you can get today: an Intel CPU without a hyperthreading problem (fixed in a microcode update months back) or an AMD CPU with a hyperthreading problem (being investigated by AMD for 3 months). Edit: thanks, s/unacknowledged/being investigated/

vvanders 9y ago
If I remember the story right it took Intel ~8months to accept that it was an issue and fix it.
- ivank 9y ago
  Would you buy a pile of Ryzen CPUs under the assumption that AMD will be able to fix it properly with an update (without e.g. disabling HT or making performance worse as they did for their TLB fix in 2007)? If they take another 2 months, you're out on your return window.
blattimwind 9y ago
That bug was acknowledged a while ago.
dis-sys 9y ago
to be fair, that Intel hyperthreading issue took Intel 5 months to investigate and fix.

shmerl 9y ago

I bought my Ryzen CPU already, and going to build a new computer shortly. So I'm literally waiting for that fix.

musha68k 9y ago
That sucks indeed :( I just wanted to say that many recent CPUs seem to be rushed efforts - be it Intel or AMD.
- api 9y ago
  AMD has pulled up to match or beat Intel, so both companies were absolutely rushing things out. It will settle down and these bugs will get fixed by microcode updates.
- AlphaSite 9y ago
  They’re not rushed, you just cannot knock out every bug in a new piece of software or hardware in one go. It is not possible (without some incredibly slow and 3xpensove processes).
gfody 9y ago
Disable hyperthreading, it's overrated anyways
- shmerl 9y ago
  Is it? I know there are workloads when it actually can hurt performance, but are they more common than ones when it helps?
  - Symmetry 9y ago
    Here's Anandtech's recent SPEC benchmark deltas on hypertheading. http://www.anandtech.com/show/11544/intel-skylake-ep-vs-amd-epyc-7000-cpu-battle-of-the-decade/15 http://www.anandtech.com/show/11544/intel-skylake-ep-vs-amd-...