[Qemu-devel] [Bug 855633] Re: guest boots up too slowly

[Yongjie Ren]

Eh?  I can reproduce very easily and it always has this issue in the qemu.git 
upstream in the past two weeks. I used rhel5u5, rhel6, rhel6u1 or any other 
images as guest, and met the same issue. And this is not a platform specific 
issue. It can be reproduced in Westmere-EP and Sandybrige-EP platforms (I often 
test kvm on the two platforms.)
‘info kvm' doesn't return 'enabled' in my box.  When we didn't have many bugs 
and all of our test cases passed  in the past, 'info kvm' din't return 
'enabled' either. Seems that there's no info document for kvm in my box all the 
time.
And for guest, there's no 'rhgb' or 'quiet' in the boot command line.
>From my eyes, I see the guest is not overall slowdown. I redirect the boot log 
>to serial port. The boot serial log of rhel6u1 guest is attached. 
For the attached boot log,
before this line "scsi 1:0:0:0: CD-ROM",  seems not so slow, and after that, 
boot slower.
but after this line "Starting udev: udev: starting version 147", it's very very 
slow and I can see it just print one line after another line with my eyes.
BTW, shutting down guest is also much slower than before.

** Attachment added: "rhel6u1-guest-slow.log"
   
https://bugs.launchpad.net/qemu/+bug/855633/+attachment/2446943/+files/guest-rhel6u1-slow.log

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/855633

Title:
  guest boots up too slowly

Status in QEMU:
  New

Bug description:
  qemu.git commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
  kvm.git commit: 7f914d61cd2156e34a7852462bb4932621f33a34

  It will costs about 180 seconds to booting up a rhel6 guest. But when
  I use qemu-kvm.git with commit a040d28b, the rhel6 guest can boot up
  in about 50 seconds.  I did the comparative test in the same box and
  using the same command line to create a guest  BTW, I tested qemu-
  kvm.git not qemu.git before kernel.org was down.

  Reproduce steps:
  ----------------
  1. to create a guest: qemu-system-x86_64  -m 1024 -smp 2 /root/rhel6.img
  (It maybe cost about 180 seconds to boot up.)

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/855633/+subscriptions