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Altera_Forum's avatar
Altera_Forum
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8 years ago

Kernel Report Occupancy

Hi mates! Im struggling to understand what the occupancy means.. for my understanding its the amount of time spent by the kernel doing a memory access. Is it right? So if my occupancy its ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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Occupancy refers to what percentage of the profiled time the kernel pipeline is full with no "bubbles". 100% occupancy is good because it means that every stage of the pipeline is always active during the profiled time period. See the best practices guide for details on this.

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I saw the definition on the Best Practices Guide, but if i have a low percentage occupancy on a load operation is because of the memory latency / contention?

for example

# pragma unroll N

for ...

aux ^= a[z*16 +j]; //occupancy 25%