Michael,
I have strange problems with top on multi processor boxes. The loading
shows max use at 50% (dual proc. box). I recompiled it after I had
compiled my custom kernel and it began to behave properly. Apparently, the
standard shipping top is _really_ i386.
Jim Kinney
On Mon, 29 May 2000 ">hirsch@zapmedia.com wrote:
> Mike Kachline writes:
> > On Fri, 26 May 2000 ">hirsch@zapmedia.com wrote:
> >
> > > How does top indicate MMX usage? I have a computationally intense
> >
> >         Michael,
> >
> >         MMX is just a fancy form of floating point arithmetic. Thus,
> > though I have no definative proof for this statement, I would *highly*
> > suspect that if your program was spending a lot of its time performing
> > MMX operations, it would show up as being rather busy under "top". "ps",
> > "top" nor any of the other OS "process management" programs care as to
> > what exactly your program is doing (ie, what X86 instructions are being
> > executed), only, how many instructions are being executed.
>
> Well, that makes me more confused than ever.
>
> >         My hunch is that, if you've got a program which is slow, yet sits
> > at 0% CPU usage, chances are it's blocking on I/O of some form. If your
> > hard drive is thrashing away, you could probably count on disk IO.
> > Otherwise, I'd be willing to bet some form of network IO problems.
>
> It is definitely not blocking. It is showing full motion mpeg video
> and sound from a ripped vob file of a DVD of the matrix. Lots of
> motion, quick cuts, etc. And all this while not showing up on top at
> all.
>
> Here's another possibility. I'm runnin 2.3.99.pre3. Could that be
> confusing top? The GIMP shows up on top fine.
>
> I could run a time consuming filter in the GIMP with with no
> noticeable slowdown while my application is running with no noticeable
> affect.
>
> Something is weird, here.
> --
> ------------------------
> Michael D. Hirsch, Ph.D.
> Software Developer
> zapmedia.com
>
> Phone: 678-420-2722 FAX: 678-420-2839
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