Row0 EU0 never present in intel_gpu_top output

Row0 EU0 never present in intel_gpu_top output

[Peter Clifton]

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)