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Re: [Xen-devel] [PATCH] Fix clock_gettime to increment monotonically onP
| To: | John Levon <levon@xxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Fix clock_gettime to increment monotonically onPV-domain/x86 |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 15 Jun 2007 15:18:16 +0100 |
| Cc: | Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Jan Beulich <jbeulich@xxxxxxxxxx> |
| Delivery-date: | Fri, 15 Jun 2007 07:14:22 -0700 |
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| In-reply-to: | <20070615140007.GB14822@xxxxxxxxxxxxxxxxxxxxxxx> |
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| Thread-topic: | [Xen-devel] [PATCH] Fix clock_gettime to increment monotonically onPV-domain/x86 |
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On 15/6/07 15:00, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote: >> IIUC this would make it less likely to see time going backwards, but when >> you do it'll be by a lot more (the size of your precision granularity), and >> it'll occur when your time values are unlucky enough to be just on the wrong >> sides of a boundary between two time intervals which map to different >> lower-precision time values. > > The idea is that it would never be wrong enough to hit that case (taken > to extremes we wouldn't expect to see it go backwards by a minute!) Then I don't understand what you're proposing (I thought you were just shaving off least-significant bits, but it must be smarter than that). -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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