Messages in this thread | | | Date | Mon, 19 Sep 2005 16:04:43 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [ANNOUNCE] ktimers subsystem |
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On Tue, 20 Sep 2005, Thomas Gleixner wrote:
> Hmm. I don't understand the argument line completely. > > 1. The kernel has to provide ugly mechanisms because a lot of > applications implementations are doing the Wrong Thing ?
Lets skip the "wrong thing"... Or are you saying that glibc and all the apps are all wrong?
Applications call gettimeofday for a variety of reasons. One is because it is widely available over different platformsn and application want to schedule things, need timestamps etc etc.
> > Many platforms can execute gettimeofday > > without having to enter the kernel. > > Which ones ? How is this achieved with respect to all the time adjust, > correction... code ?
IA64 f.e. has a special instruction that allows access to kernel user space without having to do a context switch.
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