Re: [Xen-users] Backend drivers

[Anthony Liguori <aliguori@xxxxxxxxxx>]

jaikumar Ganesh wrote:
> Hi All
>    I am currently looking to log all the disk and network related
> accesses that guest domains make. I was looking to log them at the
> backend driver on Domain 0. Any pointers to the files/functions that I
> must look at?
>   
First, please don't cross-post to xen-devel/xen-users.  It's impolite.

I'm not sure what granularity of logging you wish to do, but if you want 
to see how much activity there is (which I reckon is what you really 
want), then I suggest taking a peek at 
/sys/class/net/vif<domid>.<vifnum>/statistics/[rt]x_bytes for the 
network activity.
The disk activity can be found by looking at the 
/sys/block/<device>/stat.  The format of that file is:
reads read_merges read_sectors read_ticks writes write_merges 
write_sectors write_ticks in_flight io_ticks time_in_queue
You'll have to find a way to figure out which devices are used by which 
domains.  If you've got multiple domains using the same device, I'm not 
sure if there's a way to identify which domains has contributed to what 
IO operations...
Regards,

Anthony Liguori
> Thanks
> Jaikumar
>
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>   

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