On Mon, 2 Sep 2013, Stephane Eranian wrote: > On Mon, Sep 2, 2013 at 4:50 AM, Andi Kleen <a...@firstfloor.org> wrote: > > Stephane Eranian <eran...@googlemail.com> writes: > > > >> I don't see a flag in mmap() to fault it in immediately. > > > > MAP_PRESENT > > > I could not find this constant defined anywhere in the kernel source tree > nor in /usr/include. Are you sure of the name?
I assume he means MAP_POPULATE which does improve things, from ~3000 cycles to ~219 cycles but that's still more overhead than the ~130 or so you get by manually touching the page first. Vince -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
