[TUHS] Subject: Re: KernelSizesA self-imposed limit of 16K held in v1, and was quite fullyutilized.Subject:Re: Kernel Sizes

[TUHS] Subject: Re: KernelSizesA self-imposed limit of 16K held in v1, and was quite fullyutilized.Subject:Re: Kernel Sizes

[Doug McIlroy]

A self-imposed limit of 16K held in v1, and was quite fully utilized.
When the iernel was rewritten in C, the limit (perhaps larger by then)
influenced the C compiler. More than one optimization was stimulated
by the need to keep the kernel in bounds.

Doug

[TUHS] Subject: Re: KernelSizesA self-imposed limit of 16K held in v1, and was quite fullyutilized.Subject:Re: Kernel Sizes

[Warner Losh]

On Sun, Jan 21, 2018 at 9:51 AM, Doug McIlroy <doug at cs.dartmouth.edu> wrote:

>
> A self-imposed limit of 16K held in v1, and was quite fully utilized.
> When the iernel was rewritten in C, the limit (perhaps larger by then)
> influenced the C compiler. More than one optimization was stimulated
> by the need to keep the kernel in bounds.
>

16k words or 16k bytes? Given some of the other reported sizes I'm guessing
it's bytes.

Warner
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[TUHS] Subject: Re: KernelSizesA self-imposed limit of 16K held in v1, and was quite fullyutilized.Subject:Re: Kernel Sizes

[Steve Johnson]

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I seem to remember that at some point early on, we spent some of our
capital budget on buying another 16K bytes for the PDP-11.  As I
recall, the deal was that the OS got 8K and users got 8K.  I also
recall that that purchase was 20% of our capital budget for the
year...

Doug, did I remember this correctly?

Steve

----- Original Message -----
From: "Doug McIlroy" <doug@cs.dartmouth.edu>
To:<tuhs at minnie.tuhs.org>
Cc:
Sent:Sun, 21 Jan 2018 11:51:29 -0500
Subject:[TUHS] Subject: Re: KernelSizesA self-imposed limit of 16K
held in v1, and was quite fullyutilized.Subject:Re: Kernel Sizes

 A self-imposed limit of 16K held in v1, and was quite fully utilized.
 When the iernel was rewritten in C, the limit (perhaps larger by
then)
 influenced the C compiler. More than one optimization was stimulated
 by the need to keep the kernel in bounds.

 Doug

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