search for: 3vcpus

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2013 Jan 09
5
vCPUs and Weight/Caps
Hello Everyone, I am hoping I can get some help with how vCPUs work with weights and caps 1. If I have a domU with 2 vCPUs and a weight of 256, does the weight double (512) or is this 256 time slice across both vCPUs. If the weight does not double, how is it beneficial to have multiple vCPUs? 2. If the domU has 2vCPUs and a cap of 100% how does this work since 100% is a mex of one physical
2008 Dec 08
10
[PATCH] Accurate vcpu weighting for credit scheduler
...large weight vcpus by small weight vcpus. For example, we assume following case on 2pcpu environment. (with 4domains (each domain has 2vcpus)) dom1 vcpu0,1 w128 credit 4 dom2 vcpu0,1 w128 credit 4 dom3 vcpu0,1 w256 credit 8 dom4 vcpu0,1 w512 credit 15 d4v0 gets 15ms credit each time. but if 3vcpus are blocking,(like d1v0, d2v0, d3v0) d4v0 credit becomes over 30msec(45msec=15x3times). Then d4v0 credit cleared. This makes d4v0 uses smaller credit than expected. This problem also occurs on d4v1 case. (blocked by d1v1, d2v1, d3v1) In my case, xentop shows following % for each domain. dom1 27 d...