https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207068
--- Comment #5 from [email protected] --- (In reply to Konstantin Belousov from comment #4) I don't know if Sandy Bridge supports the aliases or not. I do know that vmware fusion on my Broadwell machine does NOT support the IA32_A_PMCn registers and thus will panic. Note you may also need other processes using the PMC to be scheduled/unscheduled to reproduce... You have to catch a case where it writes with EAX[31]=1 to IA32_PMCn. This results in an automatic sign extension (as described in the Intel arch manual, 18.2.2.3 Full-Width Writes to Performance Counter Registers) and ignores EDX completely. -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-amd64 To unsubscribe, send any mail to "[email protected]"
