Re: lug-bg: FreeBSD: Comparing The VM With Linux
- Subject: Re: lug-bg: FreeBSD: Comparing The VM With Linux
- From: mitko@xxxxxxx (Dimitar Peikov)
- Date: Mon, 11 Mar 2002 13:21:37 +0200
On Sat, 9 Mar 2002 11:28:11 +0200
George Danchev <danchev@xxxxxxxxx> wrote:
> 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 :)
Reshix da se spra na Slack, bez da se opitvam da vkarvam ideologicheska vojna na tema koja OS e po-dobrata! V obshia sluchaj ne mislja che po-sharenia Linux ili "po-lesnia" Linux e reshenie na problema, a do kolko toj ti varshi rabota i kak shte si go nastroish :-))
A po otnoshenie na thread-a koito se zaformi ot chetvurtak nasam, sa neobxodimi malko optimizacii za koda za FreeBSD (man madvise) i neshtata zapochvat da rabotjat maaalko po dobre, no vse pak e dosta po bavno ot kolkoto na Linux!
> --
> Greets,
> fr33zb1
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