[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/965867
Title:
9p virtual
[Expired for qemu-kvm (Ubuntu) because there has been no activity for 60
days.]
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete => Expired
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** Changed in: qemu-kvm (Ubuntu)
Status: Confirmed => Incomplete
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Title:
9p virtual file system on qemu slow
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Can you still reproduce this problem with the latest version of QEMU
(currently version 2.9.0)?
** Changed in: qemu
Status: New => Incomplete
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Hi Mohan,
this parameter provide significant improvement in big file access/write:
VirtFS on /srv/shared type 9p (rw,trans=virtio,version=9p2000.L,msize=262144)
$ dd if=/dev/zero of=test count=10
Hi Max,
Could you try passing msize=262144 for 9p mount point and post the
results?
Host:
[root@llm116 media]# ls -lhas file
1.1G -rw-r--r-- 1 root root 1.0G Apr 26 11:05 file
[root@llm116 media]# dd if=/dev/zero of=file bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes
Thanks, Max. Marked as affecting upstream QEMU per the last comment.
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete = Confirmed
** Also affects: qemu
Importance: Undecided
Status: New
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Can you try with security_model=passthrough?
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Title:
9p virtual file system on qemu slow
To manage notifications about this bug go to:
One of possible problems could be a block size. In this case I am using
ZFS with raidZ 4+1 drives. Each drive has 4Kb block. So optimal block
size is 16384 bytes. By optimizing block size it possible to improve
performance 10 folds but 9p stably provides 10 folds worse performance
than native
Can you try with security_model=passthrough?
It provides the same results, see below:
$ dd if=/dev/zero of=test count=10
10+0 records in
10+0 records out
5120 bytes (51 MB) copied, 19.8581 s, 2.6 MB/s
$ dd if=/dev/zero of=test count=10 bs=16384
10+0 records in
10+0
Hi Serge,
Stability bugs was fixed in KVM, thanks!
Unfortunately this one still here:
VM:
ls -las X.bam
14537970 -rw-r--r-- 1 10001 cloud 14885246140 Mar 23 12:19 X.bam
time cp .bam test.tmp
real
** Changed in: qemu-kvm (Ubuntu)
Status: New = Incomplete
** Tags added: precise
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Title:
9p virtual file system on qemu slow
To manage
Hi,
version 1.0+noroms-20120330-0ubuntu3 has been built. Could you
verify whether that fixes the issue (as well as your others)?
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Thanks Serge,
I installed it and now testing. Let's wait for several days. I will
write if have any issues.
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Title:
9p virtual file system on
Drat.
I'll simply need to try to reproduce.
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete = New
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Title:
9p virtual file system on
Hi Serge,
qemu build 0330 does not support -fsdev. I was not able to start kvm
with 9p at all.
If you will make another build I will try it too.
Thanks
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Quoting max (965...@bugs.launchpad.net):
Hi Serge,
qemu build 0330 does not support -fsdev. I was not able to start kvm
with 9p at all.
If you will make another build I will try it too.
Thanks. Sorry about that. I'm hoping I just used an old packaging
tree as my starting base, will
Hi Serge,
I tried new build. It is not working for me. I got this message:
max@s0:/var/lib/one/var$ virsh create 52/deployment.0
error: Failed to create domain from 52/deployment.0
error: internal error process exited while connecting to monitor: kvm: -fsdev
Thanks.
I'm posting a new package based on today's git head of upstream at ppa
:ubuntu-virt/ppa. When (and if) that builds, is it possible for you to
try with that version? Then we will know whether to file this bug
upstream, or find and cherrypick the fixes.
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Hi Serge,
syslogs on host completely clean for all my 3 bugs. No messages at all
regarding any errors.
I just added this repository. I can basically update now daily as I have to
reboot server daily to make kvm working.
I installed qemu version: 1.0+noroms-20120220-0ubuntu1.
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Quoting max (965...@bugs.launchpad.net):
Hi Serge,
syslogs on host completely clean for all my 3 bugs. No messages at all
regarding any errors.
Thanks.
I just added this repository. I can basically update now daily as I have to
reboot server daily to make kvm working.
I installed qemu
Hi Serge,
Here are info:
max@s0:/var/lib/one/var$ uname -a
Linux s0 3.2.0-20-generic #33-Ubuntu SMP Tue Mar 27 16:42:26 UTC 2012 x86_64
x86_64 x86_64 GNU/Linux
max@s0:/var/lib/one/var$ kvm --version
QEMU emulator version 1.0 (qemu-kvm-devel), Copyright (c) 2003-2008 Fabrice
Bellard
ps
Thanks for taking the time to report this bug. Which release are you
currently using? Is this performance a regression over past releases?
Would it be possible for you to test with upstream qemu to see whether
performance has improved?
** Changed in: qemu-kvm (Ubuntu)
Importance: Undecided =
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