Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

OpenCL Emulator with Parallel Kernels and Channels

When using more than 3 parallel kernels that are interconnected with channels I get strange behavior in the during emulation. The kernels don't seem to actually run in parallel which causes deadlocks...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Hmmm I've had the opposite problem where everything works perfectly in emulation, but then fails on the actual device.

I think the emulator runs as a sequential program (emulating your kernels by running them one after another). I was able to get a 4 kernel cyclical design with channels running on the emulator. Perhaps there's a bug in your program causing the deadlocks?

Otherwise the channels do seem to behave differently on the emulator and on the device.