[erlang-questions] AMD Ryzen anyone?

[Eric des Courtis]

+1 for Threadripper or Ryzen Pro

On Wed, Jan 3, 2018 at 7:48 PM, Grzegorz Junka <list1@REDACTED> wrote:

>
>
> On 03/01/2018 08:21, Iblis Lin wrote:
>
>> forgot to CC the list.
>>
>>
>> On 01/03/2018 01:21 PM, Iblis Lin wrote:
>>
>>> well, purchasing decision is up to you, but I want to share my personal
>>> experience:
>>>
>>> I will vote -100 for the Ryzen build. For me, the term "Ryzen" means
>>> malicious trolling.
>>>
>>> It wasted my time and mental efforts.
>>>
>>> I will show you my journal:
>>>
>>>    - I set up the Ryzen box in 2017/5. Mine is 1700 (8 cores 16 threads).
>>>
>>>    - I install Arch Linux, ran CouchDB on it... and found the machine
>>> crash and reboot regularly in an interval of 2-3 days.
>>>
>>>    - I also tried to build mainline kernel, (at that moment, it's 4.12
>>> IIRC), not work , still crashing or freezing.
>>>
>>>    - Another test: disabling all deamon, the box can be alive over a
>>> week.
>>>
>>>    - Changing memory module in 2017/6, not work.
>>>
>>>    - 2017/9 I RMA-ed it.
>>>
>>>    - After RMA, it still keeps crashing, hard freezing, soft freezing...
>>> within 3-6 hr if I run something on it.
>>>
>>>      the kill-ryzen script DOES kill my box, even it's the new CPU back
>>> from RMA.
>>>
>>>      The *improvement* is the crashing interval shrunk. Thank you AMD.
>>>
>>>    - 2017/10, I changed my OS from Arch to Ubuntu. not work.
>>>
>>>
>>> On 01/03/2018 06:46 AM, Adam Rutkowski wrote:
>>>
>>>> Hey all,
>>>>
>>>> I'm thinking of building a Ryzen machine, mainly for Erlang
>>>> development. There's this rather obscure bug with some Ryzen processors on
>>>> Linux/BSD [1] and I'm worried I might be getting a unit from the faulty
>>>> batch; I have no means of verifying this before purchasing from my local
>>>> suppliers. I'm wondering if I should I expect any issues with Erlang VM
>>>> doing the multi-core heavy lifting.
>>>>
>>>> Cheers
>>>>
>>>> [1]: https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Se
>>>> gv-Response
>>>>
>>>>
>>>>
> Interestingly, it's not that not choosing Ryzen guarantees you a
> worry-free reality:
>
> http://www.dailymail.co.uk/sciencetech/article-5232037/Secur
> ity-flaw-Intel-chips-past-decade.html
>
> Arguably 50% slowdown or a security flaw is better than a random crash.
> But maybe the real lesson is to choose a processor that doesn't have any
> known vulnerability so far, e.g. Threadripper or a dedicated server
> processor?
>
> GrzegorzJ
>
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