Re: tuning a VERY heavily (30.0) loaded s cerver

[Alfred Perlstein]

* Rik van Riel <[EMAIL PROTECTED]> [010321 09:51] wrote:
> On Wed, 21 Mar 2001, Peter Wemm wrote:
> 
> > Also, 4MB = 1024 pages, at 28 bytes per mapping == 28k per process.
> 
> 28 bytes/mapping is a LOT.  I've implemented an (admittedly
> not completely architecture-independent) reverse mapping
> patch for Linux with an overhead of 8 bytes/pte...
> 
> I wonder how hard/easy would it be to reduce the memory
> overhead of some of these old Mach data structures in FreeBSD...

"Our" Alan Cox <[EMAIL PROTECTED]> and Tor Egge have been trimming
these structs down for quite some time.  Perhaps they should
look at Linux's system, however last I checked Linux's was
an order of magnitude less complex which might prohibit that
simplification in FreeBSD.

If you have suggestions, let's hear them. :)

-- 
-Alfred Perlstein - [[EMAIL PROTECTED]|[EMAIL PROTECTED]]


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