Re: device|total latency vs datastore|total latency

In vmware there is blog that discusses about storage performance in vsphere

http://blogs.vmware.com/vsphere/2012/05/troubleshooting-storage-performance-in-vsphere-part-1-the-basics-.html

bucause of diffrence of metrics such as KAVG (Kernel Average Latency) in vsphere  and  kernal latency in OPs I need Storage Performamce in vcenter operations manager .

What is your suggestion?