On September 2, 2001 11:46 pm, Samium Gromoff wrote:
> Daniel Phillips wrote:
> > > One thing that goes away with rmaps is the need to scan process page tables.
> > It's possible that this takes enough load off L1 cache to produce the effects
>
> I feel like that.
> actually there was a fear that the overhead of reverse map maintenance
> will overthrow the gain on low loads, but in my case this isnt an issue.
Rik's patch can be optimized a lot by using a direct pointer to the pte in the
nonshared case, and perhaps a null rmap pointer in the kernel-only case (e.g.,
page cache). If the non-optimized version is already performing better than the
traditional approach it's a very good sign. This needs careful confirmation.
Measurements where you force your system into continuous swapping would be very
interesting.
-- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Sep 07 2001 - 21:00:15 EST