Phase Jump & Domain Sync

Interview prompt

When would you phase.jump and what breaks?

WHITEBOARD CHAIN

1. DECLARE    interfaces / types / ports you need
2. SKELETON   class extends + utils macro + key methods
3. MECHANISM  fill one critical method while narrating
4. PITFALL    name one bug juniors make on this pattern
5. TEST       how you would smoke-test the component

Reference sketch (≤40 lines)

// fatal error path — rare
phase.jump(uvm_end_of_elaboration_phase.get());
// multi-clock: sync domains before shared connect

• skip to end on fatal — skips shutdown cleanup

• risk: monitors still running, resources active

• domain sync for multiple clocks before connect

Mechanism to narrate

• phase.jump aborts remaining phases in schedule

• Use only for fatal early exit — document skipped cleanup

• uvm_domain aligns phase schedules across clock domains

Key takeaways

• Default answer: avoid jump in normal tests; prefer drain + drop.

Common pitfalls

• Jump to skip slow phases in regression.

• Async clocks without domain sync — connect race.