On 07/06/2012 01:33 PM, Tomoki Sekiyama wrote: > Hi, > > On 2012/06/29 23:56, Avi Kivity wrote: >>> On 2012/06/29 2:34, Avi Kivity wrote: >>>> On 06/28/2012 08:26 PM, Jan Kiszka wrote: >>>>>> This is both impressive and scary. What is the target scenario here? >>>>>> Partitioning? I don't see this working for generic consolidation. >>>>> >>>>> From my POV, partitioning - including hard realtime partitions - would >>>>> provide some use cases. >>> >>> Exactly this is for partitioning that requires bare-metal performance >>> with low latency and realtime. >> >> It's hard for me to evaluate how large that segment is. Since the >> patchset is so intrusive, it needs a large potential user set to >> justify, or a large reduction in complexity, or both. > > Low latency or realtime is often required on high-end systems > like trading, automated control, HPC and so on, or for multimedias. > Those who want to run MRG as a guest, or to fully utilize high-speed > NIC are also worth using this. And not all of such applications does > not use up every CPU, so partitioning is becoming reasonable as a > number of cores in a server is increasing. > Anyway, I will try to make the patch as simple as possible. > >>> I think it is also useful for workload >>> like HPC with MPI, that is CPU intensive and that needs low latency. >> >> I keep hearing about people virtualizing these types of workloads, but I >> haven't yet understood why. > > One reason is ease of deployment of applications to nodes. > Especially in IaaS environment like Amazon EC2 Cluster Compute Instances, > virtualization is often introduced as a simple way to move applications > around flexibly among nodes shared by many users. Device assignment is not used in clouds yet, and you can't live migrate if you use device assignment. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
