lug-bg: FreeBSD: Comparing The VM With Linux

[danchev@xxxxxxxxx (George Danchev)]

Hm, interesting test/diskusiq e podhvanal nashiq 4ovek :)

http://kerneltrap.org/node.php?id=72

ne sym iztestval nestata no i Linux 2.4 i FreeBSD 4.x vodqt statistika za 
freeable pages i ne e nuzhno kernela da preravq cqloto adresno prostranstvo v 
pametta za da tyrsi freeable pages, vodi si nqkakva statistika po mem_zoni i 
neznam kakvo tam i tova zna4itelno uskorqva namiraneto na _pravilnite_ pages 
to free (not to mention -rmap na Rik van Riel VM which is superior, ne bez 
pomosta na Matt Dillon dokolkoto sym 4el diskusiqta mu s Rik van Riel otnosno 
tova kakvo trqbva da se podobri v 2.2 i starata 2.4 VM, segashnata 2.4 VM na 
-aa systo vodi takava statistika za freeable/active/inactive pages, ima i 
izvestni chunks ot -rmap, kojto dokolkoto sym 4el e universalnoto  reshenie, 
i za sega nqma analog v drugite unices). Tova ot edna strana, no ne vidqh 
nikude v obqsneniqta na tezi kernel gurus otnosno swapping-a da se symnqvat i 
v freebsd disk I/O throughput, koqto li4no za men e nezadovolitelna. 
Rabotata stava oste po-seriozna (linux ve4e vzima seriozno predimstvo pred 
ostanalite unices) pri context-switchinga (new scheduler) pri 2,4,8 i nagore 
-way machines (SMP), multi-threaded i preempt kernel (dosta spinlocks bqha 
iz4isteni ot coda na linux kernela, i glavno v VFS i VM koda). Prosto skoro 
vreme Solaris will be replaced ot SMP fronta... nestata se promenqt.

Taka, 4e D. Peikov nedej da syzhalqvash 4e ne polzvash debian (kakto kaza ;), 
ami osven freezbito, double-boot-vaj edin deb/sid s 2.4.17, 2.5.x kernel :)

-- 
Greets,
fr33zb1
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