Messages in this thread | | | Subject | Re: [ANNOUNCE] ktimers subsystem | From | Thomas Gleixner <> | Date | Tue, 20 Sep 2005 07:11:17 +0200 |
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On Mon, 2005-09-19 at 22:57 -0600, Christopher Friesen wrote: > >>--flight-recorder style logs > > > If you want to implement such stuff efficiently you rely on rdtscll() on > > x86 or other monotonic easy accessible time souces and not on a > > permanent call to gettimeofday. > > Not portable across architectures, and doesn't work across all smp/numa > environments. Also not easy to compare with other nodes on the network, > whereas with ntp-synch'd nodes you can use gettimeofday() for quite > accurate correlations.
Sorry was a stupid argument. Withdrawn herby
> > Please beware me of red herrings. If application developers code with > > respect to random OS worst case behaviour then they should not complain > > that OS N is having an additional add instruction in one of the pathes. > > Actually I'm not complaining about additional add instructions. I was > just suggesting some reasons why apps might reasonably want to know the > time frequently.
ok
tglx
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