Re: Using sched_clock for mmio-trace

From: Randy Dunlap
Date: Fri Feb 16 2007 - 13:49:10 EST

On Fri, 16 Feb 2007 13:30:14 -0500 Jeff Muizelaar wrote:

> On Fri, Feb 16, 2007 at 11:30:56AM -0500, Frank Ch. Eigler wrote:
> > Jeff Muizelaar <jeff@xxxxxxxxxxxx> writes:
> >
> > > I've built a tool with the goal of logging mmio writes and reads by
> > > device drivers. See
> >
> > FWIW, this is exactly a type of add-on trace patch that could be
> > mooted by adoption of the ltt/systemtap "marker" facility. With it,
> > you would not need so much code (e.g. no new user-space tools at all,
> > reuse of common tracing buffer logic, permanently placed hooks) and
> > would probably get more utility.
> Is there more information on this "marker" facility? e.g. what is a
> marker? Are they just like tracepoints?

On lkml for the past few days/months.
Look for "Linux Kernel Markers" in the subject line.

Mathieu, do you have a web site for LK Markers?

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