vex amd64->IR: unhandled instruction bytes: 0xF 0x1 0xF9 0xEB 0x11 0xE8 0xC7 0xFF vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0 vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=0F vex amd64->IR: PFX.66=0 PFX.F2=0 PFX.F3=0 ==1231== valgrind: Unrecognised instruction at address 0x4034b8. Intel x64 This is rdtscp Thanks, Jeremy
Actually this is version 3.8.1 as installed from Fedora 18. The hardware is Ivy bridge
*** This bug has been marked as a duplicate of bug 251569 ***