[Xen-devel] Re: credit scheduler error rates as reported by HP and UCSD

["Mike D. Day" <ncmike@xxxxxxxxxx>]

On 12/04/07 09:09 -0700, Diwaker Gupta wrote:
> > Questions: how does ALERT measure actual cpu allocation? Using Xenmon?
> > How does the ALERT exersize the domain? The paper didn't mention the
> > actual system calls and hypercalls the domains are making when running
> > ALERT.
> yes, we use XenMon. We also have xentop output for correlation and 
> validation.
> I think the paper describes the workloads we use. When the VMs are
> running webservers, we use httperf to generate the workload. The iperf
> benchmark uses the iperf bandwidth measurement tools and I believe the
> VMs run as iperf servers. For disk I/O, we just use a regular dd
> command to read a file into /dev/null.
For the credit scheduler ALERT tests, was some of the workload generated by 
httpperf? Or, was domu generating a lot of i/o requests to dom0?

thanks, 

Mike

> I'm not sure how one would accurately generate the set of system calls
> and hypercalls generated by a given workload. And how would you use
> this information if you had it?

--
Mike D. Day
IBM LTC
Cell: 919 412-3900
Sametime: ncmike@xxxxxxxxxx AIM: ncmikeday  Yahoo: ultra.runner
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