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9 Commits

Author SHA1 Message Date
phk
ccd7b7cc3f Fix a fencepost error. 
Found by: Lars Fredriksen <fredriks@mcs.com>
 1996-01-05 23:30:41 +00:00
phk
fbbda41bed Preallocate a small structure, so we can sbrk(2) further back. 
Reviewed by:	phk
Submitted by:	Kaleb Keithly <kaleb@x.org>
 1995-12-18 12:03:54 +00:00
peter
bb88f51c8e Change phkmalloc so that the page directory is now floating and allocated 
via mmap() up around the shared library area.  Previously the directory
was allocated from space from it's own memory pool.  Because of the way it
was being extended on processes with large malloced data segments (ie: inn)
once the page directory was extended for some reason, it was not possible
to lower the heap size any more to return pages to the OS.
(If my understanding is correct, page directory expansion occurs at 4MB,
12MB, 20MB, 28MB, etc.)  I was seeing INN allocate a large amount of short
term memory, pushing it over the 28MB mark, and once it's transient demands
hit 28MB, it never freed it's pages and swap space again.)

I've been running this in my libc for about a month...

Also, seperate MALLOC_STATS from EXTRA_SANITY..  I found it useful to call
malloc_dump() from within INN from a ctlinnd command to see where the hell
all the memory was going.. :-)  I've left MALLOC_STATS enabled, as it has
no run-time or data storage cost.

Reviewed by: phk
 1995-12-11 14:28:12 +00:00
phk
073a1e809a Remove EXTRA_SANITY, fix a unused var. 1995-10-22 14:47:00 +00:00
phk
b965b1036f phkmalloc/2 
"zero' and 'junk' options to help find and diagnose malloc abuse.
EXTRA_SANITY defaults "junk" to on.
Don't dump the internal state, unless EXTRA_SANITY.
General code cleanup.
Error messages cleaned up a bit, more checking earlier.
EXTRA_SANITY is default at this time (just in case).
Performance (without EXTRA_SANITY) is better, beats gnumalloc in
both time & space most of the time:

	# In-memory test.
	./malloc 50000000 2000 8192
	159.2u 1.5s 2:41.85 99.3% 5+7742k 0+0io 0pf+0w
	./gnumalloc 50000000 2000 8192
	272.6u 0.4s 4:35.01 99.3% 5+8533k 0+0io 0pf+0w

	# Swap-space test.
	./malloc 500000 14000 8192
	6.5u 4.1s 4:08.87 4.3% 5+49209k 0+0io 9772pf+0w
	./gnumalloc 500000 14000 8192
	16.2u 14.5s 15:36.14 3.2% 5+54100k 0+0io 47651pf+0w

	# Small items test.
	./malloc 20000000 20000 2048
	67.0u 0.3s 1:07.83 99.2% 5+18199k 0+0io 4pf+0w
	./gnumalloc 20000000 20000 2048
	66.2u 0.3s 1:07.03 99.3% 5+18107k 0+0io 0pf+0w

SANITY is not an option anymore. (!!)
 1995-10-08 18:44:20 +00:00
phk
42a27824b7 A buglet when dumping and a stylistic point from Mike. 
Submitted by:	Mike Pritchard <mpp@mpp.minn.net>
 1995-09-22 14:11:00 +00:00
phk
3f27b3de03 ``phkmalloc'' 
Performance is comparable to gnumalloc if you have sufficient RAM, and
it screams around it if you don't.
Compiled with "EXTRA_SANITY" until further notice.
see malloc.3 for more details.
 1995-09-16 09:28:13 +00:00
rgrimes
f05428e4cd Remove trailing whitespace. 1995-05-30 05:51:47 +00:00
rgrimes
be22b15ae2 BSD 4.4 Lite Lib Sources 1994-05-27 05:00:24 +00:00