RE: [PATCH 0/5] stop collection of instruction usage statistics

[Luis Fernando Fujita Pires]

From: Alex Bennée <alex.bennee@linaro.org>
> Ahh OK. If you wanted to you could probably re-create that information using
> the howvec plugin (see contrib/plugins/howvec) if the decode tables where
> added for PPC.

Interesting. I hadn't looked at the plugin mechanism before. In this 
hypothetical case, if we wanted to get the execution count for each 
instruction, we could also automatically generate the instruction decoding code 
based on decodetree. Then it would work for any architecture that uses 
decodetree.

I just realized that the ppc code wasn't counting instruction executions, but 
translations. A slightly modified version of howvec would also take care of 
that by counting the instructions directly in vcpu_tb_trans(), without even 
registering execution callbacks. Again, all hypothetical - but neat. :)

--
Luis Pires
Instituto de Pesquisas ELDORADO <http://www.eldorado.org.br>
Aviso Legal - Disclaimer <https://www.eldorado.org.br/disclaimer.html>