On Tue, Oct 04, 2005 at 09:54:17PM -0400, Marc Rocas wrote: | | That's correct. We've measured 3-5% improvement with 4MB pages on SPARC and | simply wanted to carry over to amd64. We have not carried out the | measurements on amd64 to compare 4KB vs. 2MB pages since the ratio is the | same as in SPARC. Also, off the top of my head, I can't remember whether | Opteron is on par or worse as far as its TLB is concerned as compare to | SPARC.
US-III+/IV/IV+ have 512 TLB entries for 4M pages when processes use 4M pages, and 512 TLB entries for 8K pages. If the process is using only 8K pages the TLB has 1024 entries. The Opteron has a 1024 entry TLB for 4K pages and a 16 entry TLB for 2M pages. -- Eric Lowe Solaris Kernel Development Austin, Texas Sun Microsystems. We make the net work. x64155/+1(512)401-1155 _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
