[Qemu-devel] [Bug 997631] [NEW] Windows 2008R2 very slow cold boot when 4 CPUs

[Oliver Francke]

Public bug reported:

Hi,

well, I'm in a similar boat as the one in #992067. But regardless any 
memory-settings.
It takes "ages" in a cold-boot Windows 2008R2 with qemu-1.0.1, qemu-1.0.50 and 
latest-n-greatest from today ( 1.0.50 /qemu-1b3e76e ). It eats up 400% 
host-cpu-load until login-prompt is shown on the console.

Meanwhile I tried couple of settings with "-cpu features (hv_spinlocks), 
hv_relaxed and hv_vapic. ".
Due to some Clock-glitches I start qemu-system-x86_64 with "-no-hpet".

With 2 processors the system is up after 2 minutes, with 4 procs almost
10 minutes... After a reset ( warmstart) the 4 proc-system is up after a
couple of 20 secs.

Hints welcome, though once started, the system seems to operate
"normally".

Thnx address@hidden,

Oliver.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/997631

Title:
  Windows 2008R2 very slow cold boot when 4 CPUs

Status in QEMU:
  New

Bug description:
  Hi,

  well, I'm in a similar boat as the one in #992067. But regardless any 
memory-settings.
  It takes "ages" in a cold-boot Windows 2008R2 with qemu-1.0.1, qemu-1.0.50 
and latest-n-greatest from today ( 1.0.50 /qemu-1b3e76e ). It eats up 400% 
host-cpu-load until login-prompt is shown on the console.

  Meanwhile I tried couple of settings with "-cpu features (hv_spinlocks), 
hv_relaxed and hv_vapic. ".
  Due to some Clock-glitches I start qemu-system-x86_64 with "-no-hpet".

  With 2 processors the system is up after 2 minutes, with 4 procs
  almost 10 minutes... After a reset ( warmstart) the 4 proc-system is
  up after a couple of 20 secs.

  Hints welcome, though once started, the system seems to operate
  "normally".

  Thnx address@hidden,

  Oliver.

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