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Re: [PATCH] Close small window for vsyscall time inconsistencies
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From:
Thomas Gleixner <tglx@...>
To: Roman Zippel <zippel@...>
Cc: john stultz <johnstul@...>, Paul Mackerras <paulus@...>, Tony Luck <tony.luck@...>, Ingo Molnar <mingo@...>, lkml <linux-kernel@...>
Subject:
Re: [PATCH] Close small window for vsyscall time inconsistencies
Date: Monday, April 7, 2008 - 2:27 am
On Mon, 7 Apr 2008, Roman Zippel wrote:
quoted text
> Hi, > > On Friday 4. April 2008, john stultz wrote: > > > So Thomas and Ingo pointed out to me that they were occasionally seeing > > small 1ns inconsistencies from clock_gettime() (and more rarely, 1us > > inconsistencies from gettimeofday() when the 1ns inconsistency occurred > > on a us boundary) > > What does inconsistency mean?
Time is going backwards by 1us/1nsec.
quoted text
> So instead of shooting in the dark, I'd suggest to collect some > numbers first,
That's what we did and John's analysis of the problem is pretty correct. Thanks, tglx --
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Messages in current thread:
[PATCH] Close small window for vsyscall time inconsistencies
, john stultz
, (Fri Apr 4, 4:17 pm)
Re: [PATCH] Close small window for vsyscall time inconsisten...
, Andi Kleen
, (Mon Apr 7, 7:27 am)
Re: [PATCH] Close small window for vsyscall time inconsisten...
, John Stultz
, (Mon Apr 7, 12:32 pm)
Re: [PATCH] Close small window for vsyscall time inconsisten...
, Roman Zippel
, (Sun Apr 6, 8:55 pm)
Re: [PATCH] Close small window for vsyscall time inconsisten...
, Thomas Gleixner
, (Mon Apr 7, 2:27 am)
Re: [PATCH] Close small window for vsyscall time inconsisten...
, Andi Kleen
, (Mon Apr 7, 7:29 am)
Re: [PATCH] Close small window for vsyscall time inconsisten...
, Roman Zippel
, (Mon Apr 7, 6:02 am)
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