graphic: 0.591
arm: 0.567
permissions: 0.523
mistranslation: 0.493
user-level: 0.466
virtual: 0.457
assembly: 0.456
risc-v: 0.454
device: 0.454
hypervisor: 0.445
register: 0.444
semantic: 0.443
PID: 0.442
KVM: 0.441
peripherals: 0.434
TCG: 0.434
debug: 0.398
architecture: 0.398
performance: 0.396
vnc: 0.393
ppc: 0.392
VMM: 0.392
socket: 0.387
files: 0.376
boot: 0.361
kernel: 0.353
network: 0.344
x86: 0.266
i386: 0.230

qemu does not generate guest cpu topology properly

Adding the option

-smp 12,sockets=2,cores=6,threads=1

exposes


Machine (12GB)
  Socket #0
        L2 L#0 (512KB) + L1 L#0 (64KB) + Core L#0 + PU L#0 (P#0)
        L2 L#1 (512KB) + L1 L#1 (64KB) + Core L#1 + PU L#1 (P#1)
        L2 L#2 (512KB) + L1 L#2 (64KB) + Core L#2 + PU L#2 (P#2)
        L2 L#3 (512KB) + L1 L#3 (64KB) + Core L#3 + PU L#3 (P#3)
        L2 L#4 (512KB) + L1 L#4 (64KB) + Core L#4 + PU L#4 (P#4)
        L2 L#5 (512KB) + L1 L#5 (64KB) + Core L#5 + PU L#5 (P#5)
        L2 L#6 (512KB) + L1 L#6 (64KB) + Core L#6 + PU L#6 (P#6)
        L2 L#7 (512KB) + L1 L#7 (64KB) + Core L#7 + PU L#7 (P#7)
  Socket #1
      L2 L#8 (512KB) + L1 L#8 (64KB) + Core L#8 + PU L#8 (P#8)
      L2 L#9 (512KB) + L1 L#9 (64KB) + Core L#9 + PU L#9 (P#9)
      L2 L#10 (512KB) + L1 L#10 (64KB) + Core L#10 + PU L#10 (P#10)
      L2 L#11 (512KB) + L1 L#11 (64KB) + Core L#11 + PU L#11 (P#11)


Rather than:

Machine (12GB)
  Socket #0
        L2 L#0 (512KB) + L1 L#0 (64KB) + Core L#0 + PU L#0 (P#0)
        L2 L#1 (512KB) + L1 L#1 (64KB) + Core L#1 + PU L#1 (P#1)
        L2 L#2 (512KB) + L1 L#2 (64KB) + Core L#2 + PU L#2 (P#2)
        L2 L#3 (512KB) + L1 L#3 (64KB) + Core L#3 + PU L#3 (P#3)
        L2 L#4 (512KB) + L1 L#4 (64KB) + Core L#4 + PU L#4 (P#4)
        L2 L#5 (512KB) + L1 L#5 (64KB) + Core L#5 + PU L#5 (P#5)
  Socket #1
        L2 L#6 (512KB) + L1 L#6 (64KB) + Core L#6 + PU L#6 (P#6)
        L2 L#7 (512KB) + L1 L#7 (64KB) + Core L#7 + PU L#7 (P#7)
        L2 L#8 (512KB) + L1 L#8 (64KB) + Core L#8 + PU L#8 (P#8)
        L2 L#9 (512KB) + L1 L#9 (64KB) + Core L#9 + PU L#9 (P#9)
        L2 L#10 (512KB) + L1 L#10 (64KB) + Core L#10 + PU L#10 (P#10)
        L2 L#11 (512KB) + L1 L#11 (64KB) + Core L#11 + PU L#11 (P#11)


Here is a cpuid dump from inside the guest and dump from more recent version of cpuid, in which you can see a bit more detail. The later contains data for a single CPU, because the others are the same.

Reproducible on qemu 1.0 and 1.2. with guest os Fedora 17, Debian 6, Debian Squeeze and Windows 2008 R2.



Triaging old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays?

[Expired for QEMU because there has been no activity for 60 days.]