Re: [Xen-devel] Interrupt levels

[Nicholas Lee <nic-lists@xxxxxxxxxxxxxx>]

On Wed, Mar 09, 2005 at 08:47:16AM -0000, Ian Pratt wrote:
> 
> With just a mostly idle dom0 running there's no way should be getting
> 50k interrupts a second. I think it must be being caused by a bad

Actually its 200k intr per sec.

> interaction with one of your hardware devices. Could you try out the
> beta of the graphical demo CD I posted a few days back and see if you

Unfortunately not easily. Its sitting in an ISP colo across town.

> get the same problem. Since its running off CD it won't have a driver
> for your scsi card, which might eliminate that as the candidate. I'm
> also very interested in the USB setup on the machine. Can you boot it
> with any usb modules moved out of the way so the kernel can't load them?

Default kernel doesn't have any USB modules compiled in:
nic@stateless:~$ ls -lR /lib/modules/2.6.10-xen0-stateless/ | grep ko
-rw-r--r--  1 root root  3082 2005-03-09 16:14 crc32c.ko
-rw-r--r--  1 root root 15315 2005-03-09 16:14 des.ko
-rw-r--r--  1 root root  5208 2005-03-09 16:14 md5.ko
-rw-r--r--  1 root root  9917 2005-03-09 16:14 sha1.ko
-rw-r--r--  1 root root 7030 2005-03-09 16:14 exportfs.ko
-rw-r--r--  1 root root 43294 2005-03-09 16:14 fat.ko
-rw-r--r--  1 root root 10080 2005-03-09 16:14 msdos.ko
-rw-r--r--  1 root root 103391 2005-03-09 16:14 nfsd.ko
-rw-r--r--  1 root root 14306 2005-03-09 16:14 vfat.ko
-rw-r--r--  1 root root  7946 2005-03-09 16:14 ip_conntrack_ftp.ko
-rw-r--r--  1 root root 48907 2005-03-09 16:14 ip_conntrack.ko
-rw-r--r--  1 root root  5917 2005-03-09 16:14 ip_nat_ftp.ko
-rw-r--r--  1 root root  5148 2005-03-09 16:14 iptable_filter.ko
-rw-r--r--  1 root root 26330 2005-03-09 16:14 iptable_nat.ko
-rw-r--r--  1 root root 21843 2005-03-09 16:14 ip_tables.ko
-rw-r--r--  1 root root  3715 2005-03-09 16:14 ipt_conntrack.ko
-rw-r--r--  1 root root  3140 2005-03-09 16:14 ipt_iprange.ko
-rw-r--r--  1 root root  4761 2005-03-09 16:14 ipt_MASQUERADE.ko
-rw-r--r--  1 root root  7924 2005-03-09 16:14 ipt_REJECT.ko
-rw-r--r--  1 root root  3159 2005-03-09 16:14 ipt_state.ko


> > How stable is testing at the moment? 
> 
> I would defnitely use 2.0-testing over 2.0.4 at the moment -- we're on
> the verge of releasing 2.0.5 but I want to understand your interupt
> storm issue.

Ok, compling this now.


Nicholas


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