sun4v vs. sun4u



Hi there !

Can anybody tell me what exactly (besides the virtualization hypervisor) the main potential advantage of the sun4v CPUs is? I heard rumors that they are markably slower than current US IV+ for certain applications - but I don't know what "certain" means. IOW: is the above allegation true and if yes, is there a rule of thumb when to use which CPU?

TIA

fw
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