From: Peter Clifton <pcjc2@cam.ac.uk>
To: "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>
Subject: Row0 EU0 never present in intel_gpu_top output
Date: Sat, 30 Oct 2010 04:11:30 +0100 [thread overview]
Message-ID: <1288408290.4619.8.camel@pcjc2lap> (raw)
Just a final observation.. having graphed the EU idle data from my
bastardised intel_gpu_top application. Row0 EU0 never shows up as being
used. Nor does it ever seem to appear in my intel_gpu_top profiles.
Can anyone else confirm this on a GM45 or other G4X generation chip?
I'm wondering if it is:
a) Real - and this EU is being ignored for some reason
b) Real - and this EU is not accounted the same?
c) A bug in the instdone.c library for intel_gpu_top (although I looked
and couldn't see anything obviously wrong).
d) A bug in the chip / docs / ... regarding the Row0 EU0 instdone flag
Anyway... I was just looking greedily at it as a potential 1/8th of my
GPU's cores which didn't seem to be pulling its weight. I _presume_
there is no such thing as a shipped laptop which has a dead and
factory-disabled execution unit?
Can I ask a really NOOB level question.. is the GM45 a Cantiga? If so..
shouldn't I be seeing flags for 10 EUs rather than 8? (According to the
PRM? G45: Vol1a, P.28)
Please dear goodness, someone tell me WHY Intel can't come up with a
consistent and non-mind-bending way of naming their GPUs.. isn't the
Generation number enough?
Right 4AM, my sanity is gone.. sorry for all the noise ;)
--
Peter Clifton
Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA
Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)
reply other threads:[~2010-10-30 3:11 UTC|newest]
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