Linux under VM/Virtual Image Facility

Non-idle Overhead

• Proportional to VM function requests

• Depends on configuration

• Typical of other guests and CMS (somewhere between them)
  • Diagnose 250 for minidisk I/O and IUCV make it like CMS
  • Timers, real I/O, SMP, etc. make it like VSE, Music, TPF, or OS/390

• No surprises - overhead acceptable

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