>It improves performance by avoiding the extra level of indirection >when translating the virtual address to a real address on a TLB >miss. >Doesn't have to reference the region-table entry.
That would imply an architecture change. The segment table index has long been 11 bits which corresponds to 2048 segment table entries which in turn corresponds to 2GiB. Everything above 2GiB needs a region first table, at least. -- Peter Hunkeler Credit Suisse ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
