When using the Performance Monitoring Unit to count runtime events the counter registers are limited...

ARM EN0-001 Question Answer

When using the Performance Monitoring Unit to count runtime events the counter registers are limited to 32-bits. How can more than 2A32 events be counted without significantly impacting the software performance?

Count the events using a 64-bit VFP register

Allow one event type to use concatenated counter registers

Poll the event counter, resetting it when the counter is close to overflowing

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Product: EN0-001
Update on: Jul 25, 2025
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When using the Performance Monitoring Unit to count runtime events the counter registers are limited...

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