Question abut DRQ handler

Adam Lackorzynski adam at
Mon Jul 7 23:46:00 CEST 2014

On Mon Jul 07, 2014 at 11:15:27 -0400, Yuxin Ren wrote:
> I found this code is pretty hard to understand.
> I have learned it for more than a week, but made little progress.
> I measured the cross core IPC cost, and from the result, it looks like
> there is only two IPIs, at least for simple data-only IPC.
> But I cannot make sure this based on the code.
> Could you give me more hints about this?

I think you should be looking more closely at the DRQ functionality. Did
you play with the logging options that are there (shift-O in jdb)? You
can also add you own logs with "LOG_MSG(current(), "text");" or with
some values using LOG_MSG_3VAL. You can then look at the trace in jdb
via shift-T and thus follow what the code is doing.

Adam                 adam at

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