VIP Level Parallelism

Technique

VIP Level Parallelism is a multicore testbench architecture described for eUVM in which each UVM agent or Verification IP is mapped to a separate CPU thread so compute-intensive sequence randomization can run in parallel. Its effectiveness depends on the amount of parallel work available and is limited by sequential scheduler behavior and synchronization-barrier overhead.

First seen 5/25/2026

Last seen 5/25/2026

Evidence 2 chunks

Wiki v1

WIKI

Overview

VIP Level Parallelism is a multicore testbench technique described as part of eUVM. It targets testbenches with multiple UVM agents or Verification IPs (VIPs), such as subsystem- or system-level verification environments. The technique distributes sequence randomization across multiple CPU threads by mapping each UVM agent/VIP onto a separate CPU thread.

Architecture

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NEIGHBORHOOD

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RELATIONSHIPS

3 connections

eUVM ← uses 100% 2e

eUVM maps each uvm agent on a separate CPU thread to distribute sequence randomization.

Amdahl's Law depends on → 90% 2e

VIP level parallelism performance is governed by Amdahl's Law which limits overall gains.

Verification IP uses → 100% 1e

VIP level parallelism maps each VIP/uvm agent to a separate CPU thread.

LINKED ENTITIES

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Verification IP requires_multiple_instances_of The evidence describes VIP Level Parallelism as applying to testbenches with multiple VIPs and notes that the architecture is limited to such environments.

Amdahl's Law performance_limited_by The evidence explicitly invokes Amdahl’s Law when discussing the performance of multicore testbenches and the limits of optimizing only part of the system.

CITATIONS

9 sources

9 citations — click to expand

[1] VIP Level Parallelism is described as a multicore testbench architecture in eUVM. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[2] A parallel simulator uses task executors, each with its own CPU thread, and requires synchronization barriers to keep executors synchronized with the scheduler. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[3] A subsystem-level testbench often has multiple UVM agents or VIPs, and eUVM maps each UVM agent onto a separate CPU thread to distribute sequence randomization. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[4] Sequence randomization is often the most compute-intensive testbench process because it involves solving complex constraints. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[5] The performance of multicore testbenches is limited by Amdahl’s Law, sequential scheduler behavior, and synchronization-barrier overhead. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[6] Multithreaded testbenches may provide good performance gains when tasks are comparatively compute intensive. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[7] VIP-level multicore architecture applies only to testbenches with multiple VIPs and therefore limits testbench parallelism to subsystem-level verification. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[8] Performance gain may be reduced when task load is not balanced across executors, such as when different types of VIPs are mapped to different executors. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings

[9] Sequence-level parallelization using asynchronous worker threads is presented as an approach for exploiting multicore concurrency in simpler module-level testbenches with limited UVM components. [PDF] Crafting a Million Instructions/Sec RISCV-DV - DVCon Proceedings