generated: '2026-07-21'
method: searched
source: https://sdk.upmem.com/stable/01_Install.html#functional-simulator
kind: functional-simulator
summary: >-
  The UPMEM DPU SDK integrates a functional simulator, so developers can build and
  run DPU programs with no UPMEM hardware installed. A program that finds no UPMEM
  DIMMs in the system automatically falls back to the simulator - no configuration
  needed; with real hardware present the code executes on hardware.
test_vs_live:
  detection: automatic - runtime maps to the simulator when no UPMEM DIMMs are found
  force_simulator: source $HOME/upmem-sdk/upmem_env.sh simulator
limits:
  virtual_ranks: single-chip ranks; 1 DPU per chip by default
  max_chips: 64
  max_dpus: 64
fidelity:
  functional: true
  cycle_accurate: false
  note: Instruction counts are accurate; cycle counts must not be relied on.
notes: >-
  This is the sandbox surface of a hardware SDK (simulate the DPU platform), not a
  hosted API test mode. No test credentials or magic values exist or are needed.