Re: Raspberry Pi 3B and pitiful network speeds

From: Mark Millard via freebsd-arm <freebsd-arm_at_FreeBSD.org>
Date: Sun, 20 Jun 2021 22:55:01 -0700
On 2021-Jun-20, at 22:31, Mark Millard <marklmi at yahoo.com> wrote:

> On 2021-Jun-20, at 20:27, MJ <mafsys1234 at gmail.com> wrote:
> 
>> On 21/06/2021 1:04 pm, Mark Millard wrote:
>>> 
>>> On 2021-Jun-20, at 19:16, MJ <mafsys1234 at gmail.com> wrote:
>>> 
>>> 
>>>> On 21/06/2021 7:29 am, Denis Ovsienko wrote:
>>>>> . . .
>>>>> As a separate note, in my setup ifconfig tells "100baseTX
>>>>> <full-duplex>", which is expected for RPI3B. In the original message it
>>>>> tells "1000baseT <full-duplex>", which means the board is RPI3B+ or
>>>> 
>>>> Hi Denis.
>>>> 
>>>> Yes, you're correct. This is the 3B+. I apologize for misrepresenting it. It is also the earlier version board,
>>>> 
>>>> Built in 2017. I think it's version 1.1 (it's in a case, I don't feel like dismantling it).
>>> I do not have access to such for any testing, just a 3B. (Not
>>> a reasonable comparison.) In checking on that, I ran into the
>>> following information:
>>> 
>>> https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
>>> only shows one revision for 3B+:
>>> 
>>> Code	Model	Revision	RAM	Manufacturer
>>> . . .
>>> a020d3	3B+	1.3	1GB	Sony UK
>>> . . .
>>> 
>>> Under RaspiOS the revision code shows up via: cat /proc/cpuinfo
>>> 
>>> It was released in 2018. (See https://en.wikipedia.org/wiki/Raspberry_Pi .)
>> 
>> Here's the specifications:
>> 
>> https://static.raspberrypi.org/files/product-briefs/Raspberry-Pi-Model-Bplus-Product-Brief.pdf
>> 
>> This is the exact model. It was, I believe v1.1. Later release was v1.2
>> 
>> If you do need convincing, I'm prepared to pull it apart and photograph it... :-)
> 
> I do not expect that it will show any v1.? at all on
> the PCB, unfortunately.
> 
> It is common for boards released towards the start of year Y
> to have PCBs that reference year Y-1. So I do not expect
> that a 2017 helps identify much either.
> 
> The only thing I know of that might well identify the v1.?
> vintage is to find the revision code via software, and see
> if it is a020d3 vs. something else. If it is a020d3, then
> the table at:
> 
> https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
> 
> should apply and it would be v1.3 . Otherwise, the table is useless
> for the issue, having no other documented 3B+ codes. (They document
> that "there may be codes in use in the field that are not in this
> table".)
> 
> It does not look like pulling it apart is likely to be worth it.
> If a check is made, the software check of the revision code looks
> more reasonable to me. But it is no big deal if you do not bother
> with such.

While I can not provide any better suggestions for the v1.?
part of the overall question, I can provide availability for
purchase date evidence:

https://www.raspberrypi.org/blog/raspberry-pi-3-model-bplus-sale-now-35/

is the 14th Mar 2018 Eben Upton announcement that the
"Raspberry Pi 3 Model B+ on sale now at $35".

Yes, they picked pi-day, 03.14, to start availability for
purchase.


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
Received on Mon Jun 21 2021 - 05:55:01 UTC

Original text of this message