CODEWITHSUNDEEP
cudacuda-events
AGer
AGer

Reputation: 31

Can a CUDA event be fired from device-side code?

Is there any way to fire an event (for benchmarking purposes, similar to cudaEvents in the CPU code) from a device kernel in CUDA?

E.g. suppose I would like to measure the time passed from kernel start to the first thread ever that starts a computation and the time passed from the last thread that leaves the computation to the CPU return.

Can I do that?

Upvotes: 2

Views: 775

Answers (2)

einpoklum
einpoklum

Reputation: 132220

An ugly workaround would be writing to some managed-memory location, and having a host-side thread poll it and fire the event when the value changes.

Upvotes: 1

talonmies
talonmies

Reputation: 72353

The device runtime API (used with dynamic parallelism) does have limited stream and events support, but event timing is not supported.

So, no you can't do that.

Upvotes: 2

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