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Re: [Xen-devel] Re: [PATCH] add long interrupt measurement capability
| To: | Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, Dulloor <dulloor@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Re: [PATCH] add long interrupt measurement capability |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Sat, 09 May 2009 08:56:05 +0100 |
| Cc: | "Xen-Devel \(E-mail\)" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Sat, 09 May 2009 00:56:39 -0700 |
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| Thread-topic: | [Xen-devel] Re: [PATCH] add long interrupt measurement capability |
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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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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