On Tue, May 19, 2009 at 12:27 AM, Siju George <[email protected]> wrote:
> On Mon, May 18, 2009 at 9:54 PM, Arun Sharma <[email protected]> wrote: > > > > There is continuing controversy about whether this type of an abstraction > is > > a good thing or raw hardware should be exposed to user space (and > whether > > counter scheduling should be managed in userspace). > > > > I think the OpenBSD policy is that raw hardware should not be exposed > to user space. > > http://marc.info/?l=openbsd-misc&m=114738577123893 > I'm sure OpenBSD leaves some of the hardware scheduling (eg: general purpose registers) to user space (i.e. the compiler :) I would expect most sane implementations to restrict system wide profiling and allow per process profiling more broadly (i.e. you don't have to be a user with special privileges as long as you're profiling your own stuff). -Arun
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