Pekka J Enberg wrote:
Curious, /proc/meminfo immediately after boot shows:
SLUB (debugging enabled):
(none):~# cat /proc/meminfo
MemTotal: 30260 kB
MemFree: 22096 kB
SLUB (debugging disabled):
(none):~# cat /proc/meminfo
MemTotal: 30276 kB
MemFree: 22244 kB
SLOB:
(none):~# cat /proc/meminfo
MemTotal: 30280 kB
MemFree: 22004 kB
That's 92 KB advantage for SLUB with debugging enabled and 240 KB when
debugging is disabled.
Interesting. What kernel version are you using?
Nick, Matt, care to retest SLUB and SLOB for your setups?
I don't think there has been a significant change in the area of
memory efficiency in either since I last tested, and Christoph and
I both produced the same result.
I can't say where SLOB is losing its memory, but there are a few
places that can still be improved, so I might get keen and take
another look at it once all the improvements to both allocators
gets upstream.
--
SUSE Labs, Novell Inc.
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