12/8/2010. Koen De Bosschere Ghent University Belgium JVM. Process. .NET Virtualization. Virtualization types. Xen. Paravirtualization.

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1 Integrated : the silver bullet for future multi-core computing systems? Koen De Bosschere Ghent University Belgium Virtualization types JVM Process.NET Virtualization Xen Para System VMWare Full 1

2 Full vs para Any native OS for hardware X OS for virt(x) Hypervisor:virt(X) = X Hypervisor:virt(X) X Hardware X Hardware X e.g., vmware e.g., xen Server vs. embedded Server Java,.NET, LLVM Process VMWare, Xen, System Java,.NET Android Dalvik Embedded VLX by VirtualLogix, INTEGRITY Secure Virtualization by Green Hills Software, Embedded Xen by Citrix, OKL4 Microvisor by Open Kernel Labs and MVP by VMware. 2

3 Rationale for Consolidation Server Embedded Reduce hardware cost Reduce bill of material Improve energy efficiency Consumer Electronics vs Automotive Consumer electronics Automotive Infotainment Driversystems andcomfort Also Windows Auto is an option S. Sonck Thiebaut 3

4 Rationale for Consolidation Server Embedded Optimization Dynamic optimization, Parallelism Split compilation,aot 4

5 Rationale for Consolidation Optimization Server Embedded Hardware lifecycle management Hardware lifecycle management Bridge hardware generations Create virtual legacy HW components 5

6 Rationale for Consolidation Optimization Server Embedded Hardware lifecycle management Software engineering Automatic debugging (CP) Software reuse (drivers) Physical/logical resource mngt Product families 6

7 Rationale for Server Embedded Consolidation Optimization Hardware lifecycle management Software engineering Integrated : the silver bullet for future multi-core computing systems? Koen De Bosschere Ghent Universty Belgium 7

8 A modern software stack lication Virtual ISA + Libraries Process User mode ISA + Syscalls OS Hypervisor Native ISA subset + Virt. Dev Native ISA + Phy Dev CPU Devices A modern software stack lication Virtual ISA + Syscalls OS Virtual ISA + Virt. Dev Virtual machine. Native ISA + Phy Dev CPU Devices 8

9 A simplified software stack lication OS Virtual machine. CPU Devices Virtual ISA + Syscalls Virtual ISA + Virt. Dev Native ISA + Phy Dev A simplified software stack lication OS Virtual machine. CPU Devices Virtual ISA + Syscalls Virtual ISA + Virt. Dev Native ISA + Phy Dev 9

10 Isolation for free OS3 Virtual machine. CPU Devices Virtual ISA + Syscalls Virtual ISA + Virt. Dev Native ISA + Phy Dev The physical hardware can be replaced OS3 Virtual machine. Virtual ISA + Syscalls Virtual ISA + Virt. Dev Native ISA + Phy Dev 10

11 A binary does have to be executable anymore OS3 Virtual machine. Virtual ISA + Syscalls Virtual ISA + Virt. Dev - Byte code - Meta data - Concurrency info - Mapping info Compilers change too OS3 Virtual machine. 11

12 Autoparallel Autoparallel?? OS3 Virtual machine. VM Control OS3 Virtual machine. 12

13 Big picture Productivity layer (90% programmers) Virtual machine. Big picture Productivity layer (90% programmers) Efficiency Virtual layer machine (10%.of programmers) 13

14 Big picture Productivity layer (90% programmers) Efficiency Virtual layer machine (10%.of programmers) Hardware layer Did we solve anything? 14

15 Hardware has become more flexible than software ISAs are not forever anymore 29 15

16 Evolution of no of x86 instns So what? let the HW evolve! The VM will adapt! OS3 Virtual machine. 16

17 The hardware hardware--software paradox flexibility HW SW VM time 33 Power defines performance Chuck Moore, AMD, Micro

18 OS3 Now the VM is in control Virtual machine. Now the VM is in control OS3 Virtual machine. 18

19 Systems will rely on unreliable components 37 VM can act at run time OS3 Virtual machine. 19

20 Time is relevant Is important in real life Just missed Real-time WCET Load balancing On-time scheduling 39 VM can act at run time OS3 Virtual machine. 20

21 Computing systems are continuously under attack 41 Isolation OS3 Virtual machine. 21

22 Parallelism seems to be too complex for humans 43 Portable performance? OS3 Virtual machine. + metadata 22

23 One day Moore s law will end High Volume Manufacturing Technology Node (nm) Integration Capacity (109.T) ~0.7 >0.7 Delay scaling will slow down >0.3 5 >0.5 >0.5 Energy scaling will slow down Delay = CV/I scaling Energy/Logic Op scaling Variability Medium High Very High [Shekhar Borkar, Intel 2006] Accelerators can be integrated OS3 Virtual machine

24 HiPEAC Vision Productivity layer Efficiency layer Plug & playplug & play Componentbased design Hardware components Virtualization End user Parallel and distributed languages 24