BOCCARA Michael (MICHAEL.BOCCARA++at++siege.aerospatiale.fr)
Fri, 31 Jan 1997 16:26:35 +0100
I have a problem of graphics performance on an Onyx RE2 when I run a
Performer application.
I have already opened a call on the SGI Hotline of Paris, but I would like to
have an advice from one of you pfusers, or a personnal answer from a person
of the Performer technical staff to help me.
We have 2 Onyx RE2 with each 1 RM4, and 2 CPUs. We are working (still) with
IRIX 5.3, and Performer 2.0.1
When I am running any Performer application, even perfly, both machines don't
give the same graphics performance. The drawing time is at least twice longer
on one Onyx than on the other.
I guess there is a hardware problem on the bad machine, or a problem of
configuration.
But I have a strange phenomenon, that could give you a clue to help me
searching in the good direction. I have looked at the system activity with
gr_osview while running my Performer application.
In the good Onyx, the CPU activity is almost 90 percents occupied by the
"user" part (the blue one), and the system is automatically alternating
between the 2 CPUs. I guess this is quite normal.
In the bad Onyx, the CPU activity is half shared by the "sys" part (the red
one), and there is no alternating between the two CPUs ; only one CPU is
working during one simulation. It seems like the system is fully running when
it deals with graphics display, but I 'm not a hardware specialist at all.
With what I told you, does any have an idea on where is the problem ? Which
test I should do to get a finer approach of the bug ? Which trick I could try
to turn around the bug ?
Anyway I am waiting for the HotLine answer, but thanks in advance to the
one(s) who will make me go a little forward.
Regards,
Mike
Michael Boccara - ! Aerospatiale
Software engineer ! Centre commun de
email : ! recherche Louis
Bleriot
michael.boccara(a)siege.aerospatiale.fr ! 12 rue Pasteur
Tel : (+33) (0)1 46 97 32 40 ! 92150 Suresnes
Fax : (+33) (0)1 46 97 32 59 ! France
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