Re: [Xen-devel] Re: [PATCH] add long interrupt measurement capability

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 08/05/2009 22:53, "Ian Pratt" <Ian.Pratt@xxxxxxxxxxxxx> wrote:

>> Perhaps.  However measuring cycles is important and, more
>> specifically, measuring MAX cycles spent across a set of
>> interrupts.  As a result, I suspect any code that measures
>> this (regardless of whether the result is reported by
>> xentrace or debug-key) would likely encounter the
>> same objection from Keir.
> 
> I can't imagine there'd be any objection to adding trace macros to record
> this. The xentrace log processing tool can then be updated to generate max or
> histogram values.

Yes, xentrace records would be okay. It's adding another debug key and
printing to Xen console for this purpose which I do not think is worthwhile.

 -- Keir



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