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Date:      Sun, 9 Feb 2003 09:17:38 -0500
From:      Hiten Pandya <hiten@unixdaemons.com>
To:        Jeff Roberson <jroberson@chesapeake.net>
Cc:        arch@FreeBSD.ORG
Subject:   Re: New kernel allocation API
Message-ID:  <20030209141738.GA29856@unixdaemons.com>
In-Reply-To: <20030209063342.W77658-100000@mail.chesapeake.net>
References:  <25848.1044781098@critter.freebsd.dk> <20030209063342.W77658-100000@mail.chesapeake.net>

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On Sun, Feb 09, 2003 at 06:35:05AM -0500, Jeff Roberson wrote the words in effect of:
> On Sun, 9 Feb 2003 phk@phk.freebsd.dk wrote:
> 
> > In message <20030209085317.GP88781@elvis.mu.org>, Alfred Perlstein writes:
> > >* phk@phk.freebsd.dk <phk@phk.freebsd.dk> [030209 00:31] wrote:
> > >> In message <20030209075706.GO88781@elvis.mu.org>, Alfred Perlstein writes:
> > >>
> > >> >I may see if I can convert some paths in the kernel to use zones. :)
> > >>
> > >> I have a number of places where zones can be used instead of malloc,
> > >> but since none of the places I have tried previously have resulted
> > >> in measurable performance differences it has not been high on my
> > >> agenda.
> > >
> > >Well, once converted to zones they could also be modded to take
> > >advantage of the init/fini processing which _should_ make things
> > >faster.  Also don't forget even if you don't see a perf improvement
> > >you'll see siginifigant space savings if your size is not a power of
> > >two or multiple of page size.
> >
> > I'm aware of all this, but I guess most of the objects I deal with
> > don't really have enough trafic to come out measurable, probably
> > because they don't contain mutexes.
> >
> 
> I did pipes once when I originally did UMA.  The perf was measurable.  It
> had carefully crafted init/fini ctor/dtor though.  Also, creds could
> possibly benefit.
> 
> UMA mbufs would rule too. :-)

[ CC list trimmed ]

Would it help with filesystems?

-- 
Hiten Pandya (hiten@unixdaemons.com, hiten@uk.FreeBSD.org)
http://www.unixdaemons.com/~hiten/

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