[Qemu-devel] [Bug 1589257] [NEW] Boot with OVMF extremely slow to bootloader

[Piknik]

Public bug reported:

I have used Arch Linux in the past with the same version (2.5.0), the
exact same OVMF code and vars, and the exact same VM settings with no
issues. Now with Ubuntu, I am having the issue where boot up until
Windows takes about 10x longer. Every CPU thread/core allocated gets
used 100% while this is happening. After that, everything operates as
normal. There is no abnormal logs produced by qemu, or I don't know how
to debug.

Here are my settings:

Host:
Ubuntu 16.04
Qemu 2.5.0
Relevant configs attached

Guest:
Windows 10
VirtIO raw disk image
VirtIO network
Typical VGA passthrough setup, everything operating normally

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: boot ovmf passthrough qemu slow

** Attachment added: "guest config"
   https://bugs.launchpad.net/bugs/1589257/+attachment/4677388/+files/win10.xml

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https://bugs.launchpad.net/bugs/1589257

Title:
  Boot with OVMF extremely slow to bootloader

Status in QEMU:
  New

Bug description:
  I have used Arch Linux in the past with the same version (2.5.0), the
  exact same OVMF code and vars, and the exact same VM settings with no
  issues. Now with Ubuntu, I am having the issue where boot up until
  Windows takes about 10x longer. Every CPU thread/core allocated gets
  used 100% while this is happening. After that, everything operates as
  normal. There is no abnormal logs produced by qemu, or I don't know
  how to debug.

  Here are my settings:

  Host:
  Ubuntu 16.04
  Qemu 2.5.0
  Relevant configs attached

  Guest:
  Windows 10
  VirtIO raw disk image
  VirtIO network
  Typical VGA passthrough setup, everything operating normally

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