How many/much contexts DLA memory can afford?

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

Hi,

I tried to load multiple contexts (originated from DLA engine) as many as possible.
From these experiments, I found that it hold maximum 4 dla-contexts at the same time.

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I also checked that each context requires 4,178,432 Byte.
(I checked this by calling the API “engine->getDeviceMemorySize()”.)

I want to stop loading dla engines before I load DLA engine too much.

In ‘Xavier Technical Reference Manual’, I found that
DLA memory(CVSRAM) has 4MiB physical memory and 256MiB virtual memory space.

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However, Both 4MiB and 256MiB can’t be the threshold between 4,178,432Byte4 and 4,178,432Byte5.

Why “NvMediaDlaLoadLoadable : load loadable failed.)” error occurs?

If the error is caused by the limitation of DLA’s own memory size,
how much amount of memory-size DLA memory can afford for DLA contexts?

Thanks in advance.

yjkim.

3

Hi,

Xavier only has 2DLA.

So the optimal contexts should be two.
Or the context needs to be executed in turns.

Thanks.