Re: [Xen-users] Xen 3.1 terrible slowly on a laptop

[carlopmart <carlopmart@xxxxxxxxx>]

Nico Kadel-Garcia wrote:
> carlopmart wrote:
> > Nico Kadel-Garcia wrote:
> > > carlopmart wrote:
> > > > Nico Kadel-Garcia wrote:
> > > > > carlopmart wrote:
> > > > > > Hi all,
> > > > > >
> > > > > >  I have installed rhel 5.1 with xen 3.1 on a laptop and ALL is 
> > > > > > terrible slowly (network, mouse, etc.) If I starts with a normal 
> > > > > > kernel (without xen enabled) all works normally. Do I need to pass 
> > > > > > any param to grub on xen enabled kernel to all works ok??
> > > > > > Thanks ...
> > > > > Laptops are always an adventure. Do you really have enough RAM? 
> > > > > RHEL 5 is a bit of a RAM pig. Are you using all the CPU's, or only 
> > > > > one? Is your hard drive an ATA drive that needs "hdparm" used to 
> > > > > set it optimally? Tell us more!
> > > > My laptop have 1 GB of RAM, and it is Pentium M 2.0Ghz. for guests I 
> > > > only use one cpu. And another problem is clock: lost 5 minutes every 
> > > > 15 min.... runs so slowly on host ...
> > > Umm. Not good. Are you running NTP on the Dom0, and being sure not to 
> > > run it on your DomU? And how much RAM did you allocatae for DomU? 
> > > RHEL 5 is really, really unhappy with less than 250 Meg, and not 
> > > exactly thrilled with as little as 500 Meg.
> > Yes, I am running ntp on dom0 and not on domU. I am suing 384 MB ram 
> > for guest, and rest for dom0.
> OK. I wonder if you've got some other issues going on, such as the CPU 
> being throttled back to do power saving. But what does "free" say in 
> DomU about your available RAM? Are you swapping? And are you using a 
> file image, or an LVM partition? And when you built the image, if you 
> used a file image, did you make sure that it's not "sparse"?
oops i think that you point me to the problem. I am using a sparse file for 
guest disk ... Is this really a problem?? Can't i use sparse files on a 
laptop???  And yes I have activated power saving ...
My guest config is:

kernel = "/boot/vmlinuz-2.6.9-67.ELxenU"
ramdisk = "/boot/initrd-2.6.9-67.ELxenU.img"
bootloader = "/usr/bin/pygrub"
name = "RhelUpdates"
memory = "384"
maxmem = "384"
disk = [ 'tap:aio:/data/xenvmguests/rhel4updates/rhel4vol01.xvda,xvda,w' ]
vif = [ 'type=ieomu, mac=00:16:31:a5:67:13, bridge=natxenbr0' ]
vcpus = 1
on_reboot = 'restart'
on_crash = 'destroy'
sdl = 0
vnc = 1
vfb = [ 'type=vnc,vncunused=1' ]

--
CL Martinez
carlopmart {at} gmail {d0t} com

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