Re: 2.2.18Pre Lan Performance Rocks!

["Jeff V. Merkey" <jmerkey@timpanogas.org>]

Larry McVoy wrote:
> 
> On Tue, Oct 31, 2000 at 03:38:00PM -0700, Jeff V. Merkey wrote:
> > Larry McVoy wrote:
> > > On Tue, Oct 31, 2000 at 03:15:37PM -0700, Jeff V. Merkey wrote:
> > > > The quality of the networking code in Linux is quite excellent.  There's
> > > > some scaling problems relative to NetWare.  We are firmly committed to
> > > > getting something out with a Linux code base and NetWare metrics.  Love
> > > > to have your help.
> > >
> > > Jeff, I'm a little concerned with some of your statements.  Netware may
> > > be the greatest thing since sliced bread, but it isn't a full operating
> > > system, so comparing it to Linux is sort of meaningless.
> >
> > It's makes more money in a week than Linux has ever made.
> 
> And the relevance of that to this conversation is exactly what?
> 
> > A context switch in anoperating system context in it's simplest for is
> >
> > mov    x, esp
> > mov    esp, y
> >
> > > and you can support all that and get user to user context switches in a
>                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > Apology accepted.
> 
> No apology was extended.  

hipocrite.

You're spouting nonsense.  User to user means
> process A in VM 1 switching to process B in VM 2.  I'm sorry, Mr Merkey,
> but a
> 
>         mov    x, esp
>         mov    esp, y
> 
> doesn't begin to approach a user to user context switch.  Please go learn
> what a user to user context switch is.  Then come back when you can do
> one of those in a few cycles.

You have angry fingers (one of my problems).   You don't need a user
context switch for kernel paths in a NOS kernel.  In NetWare, user
context switches are done in gates in the GDT with TSS descriptors, not
in kernel fast paths with LAN I/O, which isn't what I was talking about. 

Jeff

> --
> ---
> Larry McVoy              lm at bitmover.com           http://www.bitmover.com/lm
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