hi, i encounter several times my server crushs because qemu-kvm process
locks cpu.
thanks
--log---
Aug 18 22:07:05 localhost kernel: [4625821.185649] nf_conntrack: table full,
dropping packet.
Aug 18 22:07:05 localhost kernel: [4625821.192085] nf_conntrack: table full,
dropp
hi, i encounter several times my server crushs because qemu-kvm process
locks cpu.
thanks
--log---
Aug 18 22:07:05 localhost kernel: [4625821.185649] nf_conntrack: table full,
dropping packet.
Aug 18 22:07:05 localhost kernel: [4625821.192085] nf_conntrack: table full,
dropp
hi ,all
i now know there are 2 ways to implement io throttling,
one is cgroup, but it is only targeted at block device.
another is qemu itself.
i want to know the theory how qemu itself do io throttling? and in that case if
it depends on the type of back storage(nfs,file,rbd, other posix fs)?
it b
hi,all
i now look at qemu 2.0, i do not find rbd-api related to clone.
if qemu support this function? and from which version?
clone api of rbd is very simple(one api), why qemu does not implement?what is
the reason?
thanks.
t;you could probably come up with is qemu-img's backing file support for
>qcow2 images.
>
>You should stick to using the rbd tool to create clones of rbd devices.
>Alternatively, use a higher level tool (like openstack, etc) that
>supports this.
>
>--Iggy
>
>
>
hi,all
please tell me the defferences between two commands of the following two
groups.
my test vm is http://wiki.qemu.org/download/linux-0.2.img.bz2
qemu is qemu-kvm-0.12.1.2-2.415.el6_5.10.x86_64
kernel is 2.6.32-279.el6.x86_64, centos 6.3
---
Hi, all:
in my case it is kata that manage qemu directly via qmp. (QEMU emulator
version 5.2.0 (kata-static)).
i have tested via virsh command and make sure that qemu-system-x86_64
supports hotplug.
but if qemu was started by kata, attach-disk failed.
1. it is which option that p
Hi, i think it is curios for a process to have so many threads.
my environment: 5.4.160-1.el7.x86_64, qemu-6.1.0
thanks
=cmd==
root 11918 0.0 0.0 112720 2280 pts/0S+ 09:30 0:00 grep
--color=auto 38032
root 38032 58.0 1.0 8705632 2823304 ? Sl
Hi, all:
I tried to test the effort of nic queue's ring-size, but nic' tx vring-size
is always 256. finally i found the code.
could you tell why ?
thanks
-
n->net_conf.tx_queue_size = MIN(virtio_net_max_tx_queue_size(n),
n->net_conf.tx_queue_size);
hi, all:
i apply this patch,
https://git.centos.org/blob/rpms!!qemu-kvm/6078803a0db76660aef491907f795bb23ad33357/SOURCES!kvm-virtio-error-out-if-guest-exceeds-virtqueue-size.patch;jsessionid=124pfc40q9ejezgb0b5qrnv6m#L33
.
but this patch always results in a bug(bug?). a vm always exits wit
hi, jasowang:
according to my test , the vm's network performance is just 20% of
physical ethernet, the thread of vhost easily eat up 100% cpu when under
pressure.
when using multi queue(two queues) the performance goes up by 50%, but it uses
more threads.
if we can come to a conclusion th
hi, jasowang:
according to my test , the vm's network performance is just 20% of
physical ethernet, the thread of vhost easily eat up 100% cpu when under
pressure.
when using multi queue(two queues) the performance goes up by 50%, but it uses
more threads.
if we can come to a conclusion th
hi, all:
i apply this patch,
https://git.centos.org/blob/rpms!!qemu-kvm/6078803a0db76660aef491907f795bb23ad33357/SOURCES!kvm-virtio-error-out-if-guest-exceeds-virtqueue-size.patch;jsessionid=124pfc40q9ejezgb0b5qrnv6m#L33
.
but this patch always results in a bug(bug?). a vm always exits wit
hi, all:
i apply this patch,
https://git.centos.org/blob/rpms!!qemu-kvm/6078803a0db76660aef491907f795bb23ad33357/SOURCES!kvm-virtio-error-out-if-guest-exceeds-virtqueue-size.patch;jsessionid=124pfc40q9ejezgb0b5qrnv6m#L33
.
but this patch always results in a bug(bug?). a vm always exits wi
hi, jasowang:
according to my test , the vm's network performance is just 20% of
physical ethernet, the thread of vhost easily eat up 100% cpu when under
pressure.
when using multi queue(two queues) the performance goes up by 50%, but it uses
more threads.
if we can come to a conclusion th
i basicly understand the code, i have it done next week.
do you have any suggestion?
At 2016-10-19 16:58:21, "Yadi Hu" wrote:
>On 2016年10月18日 17:40, Stefan Hajnoczi wrote:
>> On Tue, Oct 18, 2016 at 10:24 AM, yue wrote:
>>> i apply this patch,
>>
Hi, all. virtio-net has a sudden high latency when receiving. i think it is
irq related, but i have no idea to fix it.
1) pic1: inside vm1(192.168.91.4) , ping 192.168.91.5; please notice seq 20
[1577252450.592441] 64 bytes from 192.168.91.5: icmp_seq=6 ttl=64 time=0.335 ms
[1577252451.
Hi, all. virtio-net has a sudden high latency when receiving. i think it is
irq related, but i have no idea to fix it.
centos 3.10.0-693.21.1.el7.x86_64 ; qemu-kvm-ev-2.6.0-28.el7_3.9.1.x86_64 ;
physical machine has 40 cpus, the two vms are on the same node, cpu load is
very low.
1) pic1
Hi, all. virtio-net has a sudden high latency when receiving. i think it is
irq related, but i have no idea to fix it.
centos 3.10.0-693.21.1.el7.x86_64 ; qemu-kvm-ev-2.6.0-28.el7_3.9.1.x86_64 ;
physical machine has 40 cpus, the two vms are on the same node, cpu load is
very low.
1) pi
this is my conf dumU.xml
--
error log
2012-10-11 15:08:36.758+: starting up
LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin HOME=/root USER=root LOGNAME=root
QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm
what is the defferences between /usr/libexec/qemu-kvm and
/usr/bin/qemu-system-x86_64?
my OS is centos6.2, qemu-kvm is from a rpm package, while qemu-system-x86_64
is builded manually from source code.
1.
if i can recognize they are the same thing?
2. for centos distro, how to build a qemu r
i create qcow2 format image with -o encryption, and assign password.
but when i qemu-img info encryt.qcow2 , it display encryt.qcow2 info no master
what i input, even just hit enter.
the 'Password Authentication ' of qemu-img may be invalid.
thanks.
my steps:
Create an encrypted
hi stefan:
[root@kvm ~]# qemu-img -V
qemu-img version 0.12.1, Copyright (c) 2004-2008 Fabrice Bellard
OS centos 6.3
thanks
At 2013-03-07 17:56:50,"Stefan Hajnoczi" wrote:
>On Thu, Mar 07, 2013 at 02:49:30PM +0800, yue-kvm wrote:
>> i create qcow2 format image with
hi,all
every time i remote connect my guest , ehich will be kill by signal 11.
my environment centos6.3.
audit.log
type=ANOM_ABEND msg=audit(1366249929.447:14213): auid=0 uid=107 gid=107
ses=533 subj=system_u:system_r:svirt_t:s0:c898,c1007 pid=49526
comm="qemu-kvm" sig=11
thanks
Hi!~
Now I'd like to see what the micro-ops (intermediate operations generated
by TCG) of a single Linux or Windows program, any approach to do this under
QEMU? Thanks.
But it is hard to localize a specific program instead of lots of logs.
On Mar 15, 2012 4:14 AM, "陳韋任" wrote:
> On Thu, Mar 15, 2012 at 01:26:44PM +0700, Mulyadi Santosa wrote:
> > On Thu, Mar 15, 2012 at 09:12, Yue Chen wrote:
> > > Hi!~
> > >
> &g
stem mode, I
> have
> no good idea on how to track a specific program running on the guest OS.
>
> On Thu, Mar 15, 2012 at 09:40:48AM -0400, Yue Chen wrote:
> > But it is hard to localize a specific program instead of lots of logs.
> > On Mar 15, 2012 4:14 AM, "陳韋任"
Do you know how to use that? When I use* "log(-d) exec" and "log(-d) pcall"*,
the "qemu.log" is always empty.
On Mon, May 28, 2012 at 10:47 PM, 陳韋任 (Wei-Ren Chen) <
che...@iis.sinica.edu.tw> wrote:
> On Mon, May 28, 2012 at 10:37:47PM -0400, Yue Chen wrote:
Hi,
Any approach to log all the file read/write (I/O data flow) in order,
together with the instruction traces in QEMU? Thanks.
o do this?
Thanks so much.
On Fri, Jun 1, 2012 at 4:09 AM, Stefan Hajnoczi wrote:
> On Fri, Jun 1, 2012 at 4:11 AM, Yue Chen wrote:
> > Any approach to log all the file read/write (I/O data flow) in order,
> > together with the instruction traces in QEMU? Thanks.
>
> It s
Hi, Guy,
When I use "*log cpu*" or "*log exec*" in the system "*-monitor stdio*"
mode, it's extremely slow(lose my mouse/keyboard control). I used a buffer
instead of directly writing log to disk, but even slower. When I give a
large memory ("-m 4G") to VM, or set the process priority(chrt -f 99)
Thanks for replying. Do you know any easy way to do that?
On Sat, Jun 9, 2012 at 11:02 AM, Blue Swirl wrote:
> On Sat, Jun 9, 2012 at 2:37 PM, Yue Chen wrote:
> > Hi, Guy,
> >
> > When I use "log cpu" or "log exec" in the system "-monitor stdio&
instructions come out when I use " -d in_asm "
to log? It's hard to find the real instructions of that single program...
Thanks.
2012/3/15 陳韋任
> http://qemu.weilnetz.de/qemu-doc.html#QEMU-User-space-emulator
>
> On Thu, Mar 15, 2012 at 10:42:02PM -0400, Yue Chen wrote:
> > S
tem
> mode? User mode shouldn't have the issue you described. For system mode, I
> have
> no good idea on how to track a specific program running on the guest OS.
>
> On Thu, Mar 15, 2012 at 09:40:48AM -0400, Yue Chen wrote:
> > But it is hard to localize a specific program inste
Hi!
I am doing some research based on the QEMU. Does anyone know how to get
(trace) all the instructions of the guest OS, and get all the intermediate
micro-ops ? (Not in the 0.9.1 version)
Additionally, how to get the whole memory or each process' memory data of
the guest OS?
I really apprecia
latest version.
On Mon, Mar 12, 2012 at 2:20 AM, Chen Yufei wrote:
> On Mon, Mar 12, 2012 at 5:43 AM, Mulyadi Santosa
> wrote:
> > Hi
> >
> > On Sun, Mar 11, 2012 at 10:12, Yue Chen wrote:
> >> I am doing some research based on the QEMU. Does anyone kno
hi,all
this error occured when live migration windows os, log of that vm is:
features 0x1e unsupported allowed features 0x7102
qemu warning error while loading state for instance 0x0 of device
':00:04.4/virtio-console'
do you have some idea about that?
thanks
hi,all
the connection between remote-viewer and guest is good, now unplug Network
Cable, wait several minutes, then kill virt-viewer.
now guest will be shutdwn.
---winxp.log of libvirt--
handle_dev_display_connect: connect
handle_new_display_channel: add display channel client
handle_new_
hi, all
nwfilter has many rules which depends on the mac of vm, but i find the mac
address inside vm is different from mac outside of vm.
outside mac:
vnet0 Link encap:Ethernet HWaddr FE:54:00:71:15:7B ,
inside mac:
eth0 Link encap:Ethernet HWaddr 52:54:00:71:15:7B ,virtio
it looks like vnet* are
hi.all
can we create complete image or start a vm from a snapshot point
thanks
hi,all
i encounterd 2 errors . qemu 1.5(source code build), libvirt
libvirt-0.10.2-18.el6_4.2.x86_64.
1. in guest, i can ping out, but get no answers. even throught i ping HOST ip.
May 25 20:50:59 ovirtdev NetworkManager[2370]:
/sys/devices/virtual/net/vnet0: couldn't determine device driver; i
hi,all
1. how could i know how many devices qemu support and hardware topology of all
of them?
2.the quantitativerestriction of guest's devices. vcpu,disk,ethernet,memory?
thanks you all
hi, all
in guest xp vm , device management shows a help sign on cpu device, it has two
vcpu, only one is recognized(NODE has two physical cpu).
qemu is build by myself from souce code, qemu-1.5.0, centos 6.4
a picture is attached .
---libvirt--
2
hvm
Hi,
Does anyone know, how to run(replay) the intermediate micro-ops directly?
For example, I have traced some micro-op instructions, and want to see what
happens with these instructions(after being translated into host code and
then run). Probably with Graphic User Interface.
Any approach to do
hi,all
please look at the error.
env:
libvirt-0.10.2-18.el6_4.5.x86_64
2.6.32-358.6.2.el6.x86_64
centos6.4
Thread-6291::ERROR::2013-09-18
12:44:21,205::vm::683::vm.Vm::(_startUnderlyingVm)
vmId=`24f7e975-9aa5-4a14-b0f0-590add14c8b5`::The vm start process failed
Traceback (most recent call last):
hi,all
if there any documents about snapshot and backing file's theory.
as we know vmware has composor which can upgrade images(top of backing chain )
by upgrading backing file
so i think we can implement it anyway.
now i need some infomations relevant to my idea.
and hope qemu-img developer
hi, All,
I am wondering how to determine machine's state in user-level
or kernel level from Operating System perspective.
what's meaning of CPUState.exception_is_int? Thanks.
Jianhui
.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2306
Signed-off-by: JianZhou Yue
---
hw/core/ptimer.c | 4 ++--
tests/unit/ptimer-test.c | 33 +
2 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/hw/core/ptimer.c b/hw/core/ptimer.c
index
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