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

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

[Yongjie Ren]

Public bug reported:

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.)

** Affects: qemu
     Importance: Undecided
         Status: New

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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.)

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

[Yongjie Ren]

sorry, the right command to reproduce is 'qemu-system-x86_64 -m 1024
-smp 2 -hda /root/rhel6.img'. I missed the '-hda' in the bug
description.

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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.)

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

[Zhi Yong Wu]

This is not one bug, you didn't enable kvm accelerator when you start up VM.

On Wed, Sep 21, 2011 at 11:45 PM, Yongjie Ren <855633@bugs.launchpad.net> wrote:
> sorry, the right command to reproduce is 'qemu-system-x86_64 -m 1024
> -smp 2 -hda /root/rhel6.img'. I missed the '-hda' in the bug
> description.
>
> --
> 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
>
>



-- 
Regards,

Zhi Yong Wu

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

[Avi Kivity]

Could not reproduce - RHEL 6 boots up snappily for me.

Is it an overall slowdown, or is a specific part of the boot slower?
(may need to remove 'rhgb' and 'quiet' from the boot command line).

Make sure that 'info kvm' returns 'enabled'.

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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.)

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[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

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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.)

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

[Yongjie Ren]

I used the default 'memory/queue' branch when I filed this bug.
The master tree doesn't have these two bugs, and I'll mark the bugs as invalid. 
Mark as invalid.

** Changed in: qemu
       Status: New => Invalid

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Title:
  guest boots up too slowly

Status in QEMU:
  Invalid

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

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

[Yongjie Ren]

I found this bug in memory/queue branch of qemu.git on September 21st.
As some codes in memory branch were merged into master branch, the
master tree of qemu.git also has this issue now.

** Description changed:

- qemu.git commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
+ qemu.git (memory/queue branch) commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
+ or qemu.git (master branch) commit: 8843cf40c0f482949e6ae9d0119e45d6b96fe890
  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.
+ It will costs about 180 seconds to booting up a rhel6 guest. But when I use qemu.git with commit edbb7c0, 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.
+ I found this bug in memory/queue branch of qemu.git on September 21st. As some codes in memory branch were merged into master branch, the master tree of qemu.git also has this issue now.
  
  Reproduce steps:
  ----------------
- 1. to create a guest: qemu-system-x86_64  -m 1024 -smp 2 /root/rhel6.img
+ 1.with latest qemu.git master tree, to create a guest: qemu-system-x86_64  -m 1024 -smp 2 -hda /root/rhel6.img
  (It maybe cost about 180 seconds to boot up.)

** Description changed:

  qemu.git (memory/queue branch) commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
  or qemu.git (master branch) commit: 8843cf40c0f482949e6ae9d0119e45d6b96fe890
  kvm.git commit: 7f914d61cd2156e34a7852462bb4932621f33a34
  
  It will costs about 180 seconds to booting up a rhel6 guest. But when I use qemu.git with commit edbb7c0, 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.
  I found this bug in memory/queue branch of qemu.git on September 21st. As some codes in memory branch were merged into master branch, the master tree of qemu.git also has this issue now.
  
+ I found the following log in master tree. And that merger maybe introduced this issue in master tree.
+ commit 36f490b176afab3096e9c2877b365354f67e269d
+ Merge: ebffe2a 0d95952
+ Author: Anthony Liguori <aliguori@us.ibm.com>
+ Date:   Fri Oct 14 10:44:52 2011 -0500
+ 
+     Merge remote-tracking branch 'qemu-kvm-tmp/memory/batch' into
+ staging
+ 
+ 
  Reproduce steps:
  ----------------
  1.with latest qemu.git master tree, to create a guest: qemu-system-x86_64  -m 1024 -smp 2 -hda /root/rhel6.img
  (It maybe cost about 180 seconds to boot up.)

** Changed in: qemu
       Status: Invalid => New

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https://bugs.launchpad.net/bugs/855633

Title:
  guest boots up too slowly

Status in QEMU:
  New

Bug description:
  qemu.git (memory/queue branch) commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
  or qemu.git (master branch) commit: 8843cf40c0f482949e6ae9d0119e45d6b96fe890
  kvm.git commit: 7f914d61cd2156e34a7852462bb4932621f33a34

  It will costs about 180 seconds to booting up a rhel6 guest. But when I use qemu.git with commit edbb7c0, 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.
  I found this bug in memory/queue branch of qemu.git on September 21st. As some codes in memory branch were merged into master branch, the master tree of qemu.git also has this issue now.

  I found the following log in master tree. And that merger maybe introduced this issue in master tree.
  commit 36f490b176afab3096e9c2877b365354f67e269d
  Merge: ebffe2a 0d95952
  Author: Anthony Liguori <aliguori@us.ibm.com>
  Date:   Fri Oct 14 10:44:52 2011 -0500

      Merge remote-tracking branch 'qemu-kvm-tmp/memory/batch' into
  staging

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

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

[Yongjie Ren]

This is because kvm is not enabled when starting guest by default even if I add KVM support when configuring qemu.
Now it got fixed by the following commit.

author Marcelo Tosatti <mtosatti@redhat.com>
Thu, 27 Oct 2011 20:34:42 +0800 (10:34 -0200)
committer Marcelo Tosatti <mtosatti@redhat.com>
Thu, 27 Oct 2011 20:34:42 +0800 (10:34 -0200)
commit 7879db7e9c09b92d9af1c143fbe2cc212ec89e4b
Revert "qemu-kvm: set default accelerator via target.conf"

This reverts commit a5c40eb1aa929a03157252db7337bc4ddd2435be.

Jan says:

"Unless you fully install qemu, that conf is not picked up (or an older
version is used). I'd still like to see this working with qemu started
from a build directory..."

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>


** Changed in: qemu
       Status: New => Fix Released

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Title:
  guest boots up too slowly

Status in QEMU:
  Fix Released

Bug description:
  qemu.git (memory/queue branch) commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
  or qemu.git (master branch) commit: 8843cf40c0f482949e6ae9d0119e45d6b96fe890
  kvm.git commit: 7f914d61cd2156e34a7852462bb4932621f33a34

  It will costs about 180 seconds to booting up a rhel6 guest. But when I use qemu.git with commit edbb7c0, 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.
  I found this bug in memory/queue branch of qemu.git on September 21st. As some codes in memory branch were merged into master branch, the master tree of qemu.git also has this issue now.

  I found the following log in master tree. And that merger maybe introduced this issue in master tree.
  commit 36f490b176afab3096e9c2877b365354f67e269d
  Merge: ebffe2a 0d95952
  Author: Anthony Liguori <aliguori@us.ibm.com>
  Date:   Fri Oct 14 10:44:52 2011 -0500

      Merge remote-tracking branch 'qemu-kvm-tmp/memory/batch' into
  staging

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

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

[Yongjie Ren]

It's the same reason as the following bug.    
https://bugs.launchpad.net/qemu/+bug/882358

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Title:
  guest boots up too slowly

Status in QEMU:
  Fix Released

Bug description:
  qemu.git (memory/queue branch) commit: 6cc7686696f73ae87cadef4450776a488b0e0c8b
  or qemu.git (master branch) commit: 8843cf40c0f482949e6ae9d0119e45d6b96fe890
  kvm.git commit: 7f914d61cd2156e34a7852462bb4932621f33a34

  It will costs about 180 seconds to booting up a rhel6 guest. But when I use qemu.git with commit edbb7c0, 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.
  I found this bug in memory/queue branch of qemu.git on September 21st. As some codes in memory branch were merged into master branch, the master tree of qemu.git also has this issue now.

  I found the following log in master tree. And that merger maybe introduced this issue in master tree.
  commit 36f490b176afab3096e9c2877b365354f67e269d
  Merge: ebffe2a 0d95952
  Author: Anthony Liguori <aliguori@us.ibm.com>
  Date:   Fri Oct 14 10:44:52 2011 -0500

      Merge remote-tracking branch 'qemu-kvm-tmp/memory/batch' into
  staging

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

To manage notifications about this bug go to:
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