Re: [Xen-users] PV guests concurrent running limit

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Aug 26, 2016 at 12:07:51PM -0300, Andrey Schmiegelow wrote:
> Hello xen users
> 
> I'm experiencing problems when trying to deploy more than 50 paravirtualized
> guests.
> No relevant messages in logs I found.
> 
> Follow xl-guest log
> ==========================================
> Waiting for domain smtp-051 (domid 55) to die [pid 14104]
> Domain 55 has shut down, reason code 3 0x3
> Action for shutdown reason code 3 is destroy
> Domain 55 needs to be cleaned up: destroying the domain
> Done. Exiting now
> =========================================
> 
> No messages appears in console log, even in the hypervisor.log
> 

Those are not enabled by default. Have you enabled them?

There is a trick:

xl create -p VM.cfg
(in another xterm) xl console VM
xl unpause VM

This might help extract some information.

> The tests were did under xen versions 4.4.4, 4.6.1, 4.6.3 and 4.7
> 
> The xen.gz line command contains loglvl=all guest_loglvl=all parameters.

And please also check xl dmesg

Wei.

> I also looked for any kind of limitation constant (like "50") in the source
> files with no success.
> I'm running in a dual Xeon  X5660 (12 cores / 24 HT) and 64 GBytes RAM. Each
> VM consumes less the 400 MB of RAM.
> 
> Any ideas?
> 
> Regards,
> Andrey
> 
> 
> 
> 
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