From: scj@yaccman.com (Steve Johnson)
Subject: [TUHS] Subject: Re: KernelSizesA self-imposed limit of 16K held in v1, and was quite fullyutilized.Subject:Re: Kernel Sizes
Date: Sun, 21 Jan 2018 12:48:15 -0800 [thread overview]
Message-ID: <b882ab42937551a61421354fd51a176d15715082@webmail.yaccman.com> (raw)
In-Reply-To: <201801211651.w0LGpTx4011480@coolidge.cs.Dartmouth.EDU>
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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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prev parent reply other threads:[~2018-01-21 20:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-21 16:51 Doug McIlroy
2018-01-21 19:44 ` Warner Losh
2018-01-21 20:48 ` Steve Johnson [this message]
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