On Dec 3, 2007 2:50 AM, Joseph Koshy <[EMAIL PROTECTED]> wrote: > jkoshy 2007-12-03 10:50:58 UTC > > FreeBSD src repository > > Modified files: (Branch: RELENG_7) > sys/dev/hwpmc hwpmc_x86.c > Log: > MFC r1.6: > "Revert revision 1.4. > > Intel CPUs with family 0x6, model 0xE and later (i.e., Intel Core(TM)) > have a PMC architecture that differs somewhat from previous CPUs in > family 0x6. Even though the basic programming model is similar, the > documented set of legal values that may be loaded into their PMC MSRs > differs from that of the previous PMCs in family 0x6 and reusing bit > values legal for the older PMCs could result in undefined behaviour in > the general case."
Can you say a little more about what the differences are or where one could find a discussion of them without wading through different processor model revisions? Kris, SCC, and I have been obtaining sensible results using 0xE and 0xF for the small set of sampling operations that we use. -Kip _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
