x86: 0.951 graphic: 0.911 debug: 0.886 performance: 0.829 architecture: 0.806 ppc: 0.787 device: 0.744 mistranslation: 0.734 network: 0.725 user-level: 0.717 socket: 0.695 PID: 0.683 files: 0.681 semantic: 0.663 register: 0.658 peripherals: 0.644 hypervisor: 0.621 kernel: 0.611 i386: 0.606 permissions: 0.600 vnc: 0.534 virtual: 0.489 VMM: 0.479 arm: 0.466 risc-v: 0.436 boot: 0.401 TCG: 0.397 assembly: 0.344 KVM: 0.335 -------------------- x86: 0.971 virtual: 0.462 debug: 0.164 TCG: 0.101 files: 0.094 hypervisor: 0.068 assembly: 0.020 register: 0.017 user-level: 0.012 boot: 0.008 performance: 0.007 device: 0.007 VMM: 0.004 network: 0.004 kernel: 0.003 PID: 0.003 architecture: 0.003 semantic: 0.002 socket: 0.001 graphic: 0.001 risc-v: 0.001 i386: 0.000 vnc: 0.000 permissions: 0.000 ppc: 0.000 peripherals: 0.000 mistranslation: 0.000 KVM: 0.000 arm: 0.000 No BIOS MPFP structure with smp=92 and more qemu 0.12.2, SeaBios 0.5.1, running qemu-system-x86_64.exe with option -smp. If smp>=92 then no MP floating point structure present in 1 Mb. This may be verified by pmemsave 0 0x100000 in debugger and search for _MP_ signature in file. qemu 0.10.5 (bios build 05/08/09) can smp=128 (and even 255 if not hangs :). Host win 7 x64 RTM 7600. QEMU 0.12 is quite outdated nowadays ... can you still reproduce this issue with the latest version of QEMU (currently version 2.8)? Man, really? xD 6 years have passed... Close the ticket please, I don't have this code anymore. ... still laughing... sorry Better late than never ;-)