Re: [Xen-devel] Interrupt levels

[Nicholas Lee <nic-lists@xxxxxxxxxxxxxx>]

On Tue, Mar 08, 2005 at 07:52:39AM -0000, Ian Pratt wrote:
> 
> 55k interrupts a second on a supposedly idle machine is way too many.
> Please can you post the ouput of 'cat /proc/interupts' a few seconds
> appart.

nic@stateless:~$ cat /proc/interrupts > interrupts.1 ; sleep 5 ; cat 
/proc/interrupts > interrupts.2
nic@stateless:~$ diff -u interrupts.1 interrupts.2
--- interrupts.1        2005-03-08 21:42:41.000000000 +1300
+++ interrupts.2        2005-03-08 21:42:46.000000000 +1300
@@ -3,11 +3,11 @@
...
- 22:     349736        Phys-irq  ioc0
- 24:    1575524        Phys-irq  eth0
+ 22:     349743        Phys-irq  ioc0
+ 24:    1575580        Phys-irq  eth0
...
-130:  693599538     Dynamic-irq  timer
+130:  694438303     Dynamic-irq  timer
....

Baseline:
           CPU0
  1:       1092        Phys-irq  i8042
  8:          4        Phys-irq  rtc
 11:          0        Phys-irq  ohci_hcd
 15:         11        Phys-irq  ide1
 22:     349736        Phys-irq  ioc0
 24:    1575524        Phys-irq  eth0
128:          1     Dynamic-irq  misdirect
129:        358     Dynamic-irq  ctrl-if
130:  693599538     Dynamic-irq  timer
131:          0     Dynamic-irq  console
132:          0     Dynamic-irq  net-be-dbg
133:      18922     Dynamic-irq  blkif-backend
134:      15098     Dynamic-irq  vif1.0
135:      10915     Dynamic-irq  vif1.1
136:     115583     Dynamic-irq  blkif-backend
137:     664133     Dynamic-irq  vif10.0
138:          5     Dynamic-irq  vif10.1
139:      17192     Dynamic-irq  blkif-backend
140:      51367     Dynamic-irq  vif9.0
141:      57060     Dynamic-irq  vif9.1
142:      31778     Dynamic-irq  blkif-backend
143:      19907     Dynamic-irq  vif4.0
144:     637287     Dynamic-irq  vif4.1
145:      16274     Dynamic-irq  blkif-backend
146:      16437     Dynamic-irq  vif7.0
147:      27508     Dynamic-irq  vif7.1
NMI:          0
ERR:          0



> Have you any USB devices connected?


Nope.







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