[Cbe-oss-dev] Required cycles for an SPE context-switch

[csc81 at csc81.de]

Hello all :)

For my diploma thesis I would like to know the average costs of an SPE 
context-switch on a PS3 running Fedorra Core 7 Linux (expressed in core 
clock frequency cylces or microseconds) in absence of contention and 
under load. A rough estimation would be sufficient. The costs should 
include the communication over the EIB and the computational costs of 
the linux kernel (SPE scheduler and maybe others).

My goal is to create a diagram that shows the percentage which is needed 
for context switching on N SPEs depending on different SPE Scheduler 
frequencies relative to the available resources on one Cell processor.

I need this information to estimate the overhead of the preemptive 
programming model. In particular the worst case is interesting.

Does anyone know a rough value or at least a paper or a documentation 
where I can find this information?

Greetings
Carsten