architectural checkpointing

Architectural Checkpointing

Concept

Architectural checkpointing is a technique used in hardware verification that captures snapshots of a design's architectural state during simulation. These checkpoints allow engineers to quickly reload simulation state to a point before a suspected bug trigger, enabling rapid re-running of tests with potential fixes. Checkpoints also facilitate moving verification workloads between FPGA and software simulation environments, allowing engineers to leverage the transparency of software simulation and the speed of FPGA emulation. In the context of BlackParrot RISC-V verification, architectural checkpointing is used within ISA simulators to segment program execution into independent pieces that can be cosimulated in parallel against a golden reference model.

First seen 7/4/2026

Last seen 7/4/2026

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Architectural Checkpointing

Architectural checkpointing is a verification technique that captures snapshots of a design's architectural state during simulation. These checkpoints serve as reload points that allow verification engineers to return to a known-good state prior to a suspected bug trigger, enabling fast iteration when testing potential fixes.

Purpose in Verification

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RELATIONSHIPS

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ISA co-simulation ← uses 92% 2e

ISA cosimulation leverages architectural checkpointing to parallelize and speed up co-simulation

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ISA co-simulation USES Extracted graph relationship

CITATIONS

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[1] Architectural checkpointing allows quickly reloading simulation state to a snapshot of the design before the bug trigger point to test potential fixes. BlackParrot verification dissertation (Chapter 2, Background)

[2] A checkpoint snapshot can be used to move verification between FPGA and software simulation to leverage the transparency and speed tradeoff between the two environments. BlackParrot verification dissertation (Chapter 2, Background)

[3] Architectural checkpointing is leveraged in ISA simulators to break down program execution into several segments and perform ISA cosimulation for each segment independently and in parallel on different server threads. BlackParrot verification dissertation (Chapter 2, Background)