On Fri, 18 Mar 2005, Denis Vlasenko wrote: > NT stores are not about 5% increase. 200%-300%. Provided you are ok with > the fact that zeroed page ends up evicted from cache. Luckily, this is exactly > what you want with prezeroing.
These are pretty significant results. Maybe its best to use non-temporal stores in general for clearing pages? I checked and Itanium has always used non-temporal stores. So there will be no benefit for us from this approach (we have 16k and 64k page sizes which may make the situation a bit different). Try to update the i386 architectures to do the same? Or for prezeroing, you could register a zeroing driver that would use the non-temporal stores with V8 of the prezeroing patches. In any case the clear_pages patch is not useful the way it was intended for us and I am have dropped this from the prezeroing patch. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
