Re: [PATCH v3 06/23] trace-cmd: Add new trace-cmd clock tsc2nsec

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On Wed, 24 Mar 2021 14:32:07 -0400
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> On Wed, 24 Mar 2021 15:04:01 +0200
> "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@xxxxxxxxx> wrote:
> 
> > +static void get_tsc_offset(struct common_record_context *ctx)
> > +{
> > +	struct buffer_instance *instance;
> > +
> > +	for_all_instances(instance) {
> > +		if (is_guest(instance) || !instance->clock)
> > +			return;

			^^^^^^^

That's the return I was talking about.

-- Steve

> > +
> > +		ctx->tsc2nsec.offset = get_clock_now(instance->clock);
> > +		return;
> > +	}
> > +
> > +	ctx->tsc2nsec.offset = get_clock_now(NULL);
> > +}  
> 
> Why is the above "return" and not "continue"?
> 
> It seems inconsistent depending on the order. If the first instance found
> is a guest or does not have a clock set, then we don't get the tsc offset,
> but if the first instance is something else we do, even if a guest or an
> instance exists.
> 
> -- Steve
> 
> 
> > +
> >  /*
> >   * This function contains common code for the following commands:
> >   * record, start, stream, profile.  




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