Emulator: Emulators max number of simultaneous kernelthreads (4096) exceeded!

Altera_Forum · ‎07-29-2016

Hello, just started with AOCL, got this issue in emulation.

While running a kernel, this error is returned using "checkError" function in the AOCLUtils.

context callback: emulator: emulators max number of simultaneous kernelthreads (4096) exceeded!

This continues for a couple iterations, and the program fails with

host: acl_emulator.c:159: __acl_emulator_next_workspace_id: assertion `start!=__acl_emulator_workspace_enumerator && "emulator: to many workspaces active at the same time"' failed.

I tried googling and searching on these forums to no avail, can anyone give me an idea of what issue this might be and how I could solve it? If anyone needs more information I will try my best to provide them.

Thanks.

Altera_Forum · ‎07-29-2016

I changed the kernel from enqueueNDRange to enqueueTask and it seems to be working on emulation.

I would still like to know why the initial run fails if anyone has an idea. Thanks.

Altera_Forum · ‎08-09-2016

What is your local_size (threads per group)?

Altera_Forum · ‎08-10-2016

800 at its largest IIRC, in that case, it was the same as the global ID.