dan@NADC.ARPA (06/15/84)
Hello,
I want to rebuild our UNIX 4.1 BSD system to allow a user process that
requires just under 9M bytes of memory to run. Size tells me the
following.
text data bss dec hex
36864 5120 8926304 8968288 88d860
The write up on page 21 of the Installing/Operating 4.1bsd leaves some
information to be desired. I can see that I have to increase "MAXDSIZ".
What do I have to change in "dmap.h" and "text.h". What changes do I
have to make to confhp.c? I do have the line "config hphp vmunix" in
the in system configuration file. The primary swap area is hp0b and the
and the alternate is hp1b (16M + 16M). The entry /dev/hp1b::sw:: is in
/etc/fstab.
What other changes do I have to make?
What commands (like ps and w ) have to be recompiled?
Thanks,
Dan Tarrant (AV 441-3985)
(Comm 215-441-3985)guyton@RAND-UNIX.ARPA (06/15/84)
From: Jim Guyton <guyton@RAND-UNIX.ARPA> Here are some notes that I made from a paper on how to do this written by the folks at USC-ISI. They had to figure out how to do it in order to run reasonably sized Vax Interlisp programs .... -- Jim --------------------Forwarded notes Change DMMIN and NDMAP in h/dmap.h #define NDMAP 24 /* Was 16 */ #define DMMIN 128 /* Was 32 */ in h/vmparam.h #define MAXDSIZ (22*1024-128-SLOP) #define MAXSSIZ (22*1024-128-SLOP) Some explaination from the Interlisp notes: -------------- DMMIN is increased by 400% to enlarge the minimum allocation (for data and stack) per process. NDMAP is increased by 50% to enlarge the total number of allocations per process. Thus, for data or stack segments, a process is initially given a chunk of 128 (DMMIN) blocks. If necessary, a subsequent chunk of 256, then 512, and finally 1024 blocks is given. The last chunk size of 1024 (DMMAX) block is repeatedly allocated 21 times, if necessary, until 24 (NDMAP) allocations are made in all. MAXDSIZ and MAXSSIZ are increased by 182% to enlarge the total allocation (for data and stack) per process. This patch must be made in conjunction with the above change to dmap.h MAXDSIZ and MAXSSIZ can each comprise 21 1024-block-chunks, plus chunks of size 128, 256, and 512. The aggregate of the latter chunks is equivalent to 1024-128. Hence, the maximums 21*1024 + (1024-128) = 22*1024-128. ------------- They then even give a short C pgm that calculates it as a function of DMMIN, DMMAX and NDMAP. Basically, it just starts with DMMIN, doubles the block size each time until it reaches DMMAX, and continues with DMMAX until NDMAP total allocations have been made. --------------------End of old notes