Ivan Voras wrote:
Ivan Voras wrote:
Another data point - the OS in the VM in question hanged today
sometime after 5 AM in the following way:
* console nonresponsive (also to ctrl-alt-del)
* ssh login nonresponsive (timeout)
* ping works (!)
Judging by the last seen timestamp, th
Ivan Voras wrote:
Another data point - the OS in the VM in question hanged today sometime
after 5 AM in the following way:
* console nonresponsive (also to ctrl-alt-del)
* ssh login nonresponsive (timeout)
* ping works (!)
Judging by the last seen timestamp, the machine should hav
Steven Hartland wrote:
We're not running 8 yet but we do have a 7.x box which its under fairly
high IO load doing mrtg graphs which has similar behaviour. When typing
a command on ssh it will freeze for may seconds.
We have a FreeBSD 7.2 cacti box running on a dell 1950 that has the same
prob
Ivan Voras wrote:
2009/10/13 Larry Rosenman :
note huge packet loss. It looks like it's VM fault or something like it.
It sounds like the VM is failing to execute the guest during certain
types of I/O. A bit of scheduler tracing in the host OS probably wouldn't go
amiss to confirm that the VM
On Oct 12, 2009, at 10:45 AM, Thomas Backman wrote:
>Here's the original thread (not from the beginning, though):
>http://lists.freebsd.org/pipermail/freebsd-performance/2009-October/003843.html
>Long story short, my version: when the disk is stressed hard enough,
>console IO becomes COMPLETELY un
On Tue, Oct 13, 2009 at 09:58:09AM +0200, Thomas Backman wrote:
>
> On Oct 13, 2009, at 12:35 AM, Luigi Rizzo wrote:
...
> >hi,
> >this issue (not specific to FreeBSD, and not new -- it has been
> >like this forever) is discussed in some detail here
> >
> > http://www.bsdcan.org/2009/schedule/
Kris Kennaway wrote:
Ivan Voras wrote:
I recall others having various weird problems in 3.5 that went away when
they upgraded to 4.0.
It would be a good idea except that apparently my installation is
unupgradeable because of "unsupported boot disk" (a SCSI RAID volume).
Ivan Voras wrote:
2009/10/13 Larry Rosenman :
note huge packet loss. It looks like it's VM fault or something like it.
It sounds like the VM is failing to execute the guest during certain
types of I/O. A bit of scheduler tracing in the host OS probably wouldn't go
amiss to confirm that the VM
Larry Rosenman wrote:
On Tue, 13 Oct 2009, Ivan Voras wrote:
As for what data is needed, it depends on what you can get - from this
discussion thread it looks like it would be enough to verify that disk
IO doesn't leave VM processes waiting (i.e. that disk IO doesn't
interfere with CPU-bound o
On Tue, 13 Oct 2009, Ivan Voras wrote:
2009/10/13 Larry Rosenman :
note huge packet loss. It looks like it's VM fault or something like it.
It sounds like the VM is failing to execute the guest during certain
types of I/O. A bit of scheduler tracing in the host OS probably wouldn't go
amiss
2009/10/13 Larry Rosenman :
note huge packet loss. It looks like it's VM fault or something like it.
>>>
>>> It sounds like the VM is failing to execute the guest during certain
>>> types of I/O. A bit of scheduler tracing in the host OS probably wouldn't go
>>> amiss to confirm that the VM r
On Tue, 13 Oct 2009, Ivan Voras wrote:
Robert N. M. Watson wrote:
On 13 Oct 2009, at 14:33, Ivan Voras wrote:
If (1) is highly variable during I/O, it's almost certainly a property of
the VM technology you're using, and there's nought to be done about it in
the guest OS.
Here's an example
Robert N. M. Watson wrote:
On 13 Oct 2009, at 14:33, Ivan Voras wrote:
If (1) is highly variable during I/O, it's almost certainly a
property of
the VM technology you're using, and there's nought to be done about
it in
the guest OS.
Here's an example of a ping session with 0.1s resolution
Robert N. M. Watson wrote:
On 13 Oct 2009, at 14:33, Ivan Voras wrote:
If (1) is highly variable during I/O, it's almost certainly a
property of
the VM technology you're using, and there's nought to be done about
it in
the guest OS.
Here's an example of a ping session with 0.1s resolution
On 13 Oct 2009, at 14:33, Ivan Voras wrote:
If (1) is highly variable during I/O, it's almost certainly a
property of
the VM technology you're using, and there's nought to be done about
it in
the guest OS.
Here's an example of a ping session with 0.1s resolution during a few
seconds-stall
2009/10/13 Robert Watson :
>
> On Tue, 13 Oct 2009, Ivan Voras wrote:
>
>> Thomas Backman wrote:
>>>
>>> I'm copying this over from the freebsd-performance list, as I'm looking
>>> for a few more opinions - not on the problems *I* am having, but rather to
>>> check whether the problem is universal
On Tue, 13 Oct 2009, Ivan Voras wrote:
Thomas Backman wrote:
I'm copying this over from the freebsd-performance list, as I'm looking for
a few more opinions - not on the problems *I* am having, but rather to
check whether the problem is universal or not, and if not, find a possible
common fa
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Ivan Voras wrote:
> Thomas Backman wrote:
>> I'm copying this over from the freebsd-performance list, as I'm
>> looking for a few more opinions - not on the problems *I* am having,
>> but rather to check whether the problem is universal or not, and if
Thomas Backman wrote:
I'm copying this over from the freebsd-performance list, as I'm looking
for a few more opinions - not on the problems *I* am having, but rather
to check whether the problem is universal or not, and if not, find a
possible common factor.
In other words: I want to hear abou
On Tue, Oct 13, 2009 at 11:13:31AM +0100, Kris Kennaway wrote:
> Luigi Rizzo wrote:
> >On Mon, Oct 12, 2009 at 09:48:42PM +0200, Thomas Backman wrote:
> >>I'm copying this over from the freebsd-performance list, as I'm
> >>looking for a few more opinions - not on the problems *I* am having,
> >
Luigi Rizzo wrote:
On Mon, Oct 12, 2009 at 09:48:42PM +0200, Thomas Backman wrote:
I'm copying this over from the freebsd-performance list, as I'm
looking for a few more opinions - not on the problems *I* am having,
but rather to check whether the problem is universal or not, and if
not, fi
On Oct 13, 2009, at 12:35 AM, Luigi Rizzo wrote:
On Mon, Oct 12, 2009 at 09:48:42PM +0200, Thomas Backman wrote:
I'm copying this over from the freebsd-performance list, as I'm
looking for a few more opinions - not on the problems *I* am having,
but rather to check whether the problem is unive
On Mon, Oct 12, 2009 at 09:48:42PM +0200, Thomas Backman wrote:
> I'm copying this over from the freebsd-performance list, as I'm
> looking for a few more opinions - not on the problems *I* am having,
> but rather to check whether the problem is universal or not, and if
> not, find a possible
o: "freebsd-stable"
Sent: Monday, October 12, 2009 8:48 PM
Subject: Extreme console latency during disk IO (8.0-RC1,previous releases also
affected according to others)
I'm copying this over from the freebsd-performance list, as I'm looking for a few more opinions - not on the
I'm copying this over from the freebsd-performance list, as I'm
looking for a few more opinions - not on the problems *I* am having,
but rather to check whether the problem is universal or not, and if
not, find a possible common factor.
In other words: I want to hear about your experiences,
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