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From: wesommer@athena.mit.edu (William Sommerfeld)
Newsgroups: comp.arch,comp.unix.wizards,comp.os.misc
Subject: Re: Shared libraries (Was: Re: Big Programs Hurt Performance)
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Date: Wed, 7-Oct-87 23:38:27 EDT
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Posted: Wed Oct  7 23:38:27 1987
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In article <30034@sun.uucp> guy%gorodish@Sun.COM (Guy Harris) writes:
>Good, somebody has access to real and current data....
[regarding the size of Multics]

The Multics hardcore supervisor (roughly equivalent to the UNIX kernel
less its network & socket code) is about 160,000 lines of PL/1 and
70,000 lines of "non-PL/1" (assembler, mostly).

By comparison, the equivalent part of the VAX BSD+NFS kernel (/sys/h,
/sys/ufs, /sys/vax, /sys/vaxuba, /sys/vaxmba, and /sys/sys less
/sys/sys/uipc_*) is about 110,000 lines, of which about half are
device drivers; of the device drivers, maybe 1/4 are in use on an
average system.  So, it's about 230,000 lines for Multics vs. about
65,000 for an equivalent section of BSD unix.

For the *total* Multics system as of 1985, someone counted about 2
millon lines of PL/1 source, 224 thousand lines of assembler source,
and 165 thousand lines of "other source", compiled into 10 million 36
bit words of object code (that's 45 MB).

					- Bill