[TUHS] (Amdahl UNIX) "Notes on Au Performance - or How to get the Pb out of Au"

[TUHS] (Amdahl UNIX) "Notes on Au Performance - or How to get the Pb out of Au"

[Tom Lyon]

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This is perhaps the first significant document I wrote at Amdahl. Although
undated, I believe this was written in August 1979, after I had attended a
2 week class at IBM Chicago about VM//370(CP) internals and performance.

The paper makes reference to V7 UNIX being "on order", so this is when the
V6 UNIX system was in use.  IIRC, V7 UNIX was released in Nov. of 1979.

https://drive.google.com/file/d/1cB2eqTwmicj1AQOiULDZjED5Rq-_V4N4/view?usp=sharing

Huge thanks to my friend Karl D. for hanging on to this for 44 years.

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[TUHS] Re: (Amdahl UNIX) "Notes on Au Performance - or How to get the Pb out of Au"

[Sebastien F4GRX]

Hi,

Thank you, this is a very interesting read. I will share this with 
friends as soon as this is publicly available in the TUHS archives.

We see premices of the Linux Copy-On-Write forking method!

I also note that they decided to avoid a global kernel lock.

Sebastien

Le 19/07/2023 à 03:08, Tom Lyon a écrit :
> This is perhaps the first significant document I wrote at Amdahl. 
> Although undated, I believe this was written in August 1979, after I 
> had attended a 2 week class at IBM Chicago about VM//370(CP) internals 
> and performance.
>
> The paper makes reference to V7 UNIX being "on order", so this is when 
> the V6 UNIX system was in use.  IIRC, V7 UNIX was released in Nov. of 
> 1979.
>
> https://drive.google.com/file/d/1cB2eqTwmicj1AQOiULDZjED5Rq-_V4N4/view?usp=sharing
>
> Huge thanks to my friend Karl D. for hanging on to this for 44 years.

[TUHS] Re: (Amdahl UNIX) "Notes on Au Performance - or How to get the Pb out of Au"

[Sebastien F4GRX]

Hi again,

this remark actually applies to the other document about unix370 
feasability, oops!

However, That one is also interesting. I read in it at 6.1.4 "Login 
procedure optimization" about "combining (..) (init, getty and login) 
into one [program]". We can see this as the premices for the modern 
systemd :-)

Sebastien

Le 19/07/2023 à 15:50, Sebastien F4GRX a écrit :
> Hi,
>
> Thank you, this is a very interesting read. I will share this with 
> friends as soon as this is publicly available in the TUHS archives.
>
> We see premices of the Linux Copy-On-Write forking method!
>
> I also note that they decided to avoid a global kernel lock.
>
> Sebastien
>
> Le 19/07/2023 à 03:08, Tom Lyon a écrit :
>> This is perhaps the first significant document I wrote at Amdahl. 
>> Although undated, I believe this was written in August 1979, after I 
>> had attended a 2 week class at IBM Chicago about VM//370(CP) 
>> internals and performance.
>>
>> The paper makes reference to V7 UNIX being "on order", so this is 
>> when the V6 UNIX system was in use.  IIRC, V7 UNIX was released in 
>> Nov. of 1979.
>>
>> https://drive.google.com/file/d/1cB2eqTwmicj1AQOiULDZjED5Rq-_V4N4/view?usp=sharing 
>>
>>
>> Huge thanks to my friend Karl D. for hanging on to this for 44 years.