--- Julian Elischer <julian_at_elischer.org> wrote: > Barney Cordoba wrote: > > I have an app which reads stats from the kernel > > periodically, and there can be a lot of > iterations, > > sometimes 20,000 or more. I'm thinking of > converting > > from an ioctl method to kvm_read(). KVM is > certainly > > simpler, but its not clear what overhead is > involved, > > since kvm_read() likely has to call the kernel > also. > > > > Does anyone have a handle on the difference in > > overhead, assuming that the ioctl call is to a > module > > which does nothing more than copy the data and > return? > > tried a shared memory page? No, but I built a test and kvm_read is 70 times faster, in case anyone is interested. Barney ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hsReceived on Fri Mar 21 2008 - 21:36:26 UTC
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