i am apart of a team creating a multi-threaded demo, and on this demo we are measuring how much of the CPU(s) each subsystem is taking. i am curious if there is a way or method to hook into FMOD and capture this information.
- mwy23 asked 10 years ago
I try to test FMOD on real ASIO device on Windows. The device is EMU Trecker Pre/USB.
The problem is that DSP CPU in GetCPUUsage is ZERO on ASIO API. But I add three DSP effect with 40% cpu load in Windows Task Manager.
FMOD with DirectSound API shows DSP at 40%.
I found another intersting thing. The amount of CPU usage in FMOD can be more than 100%. And you here cracks of sound in that time. I get temporary 120% cpu usage with sound cracks. So if usage is more than 100% you get crack.
Am I right?
- cemehehko answered 8 years ago
Each item there represents a thread.
stream = stream thread
dsp = software mixer thread
update = main thread
total = all added together.
We dont control what threads go on what cpu so you can see with 3 threads there might be 1 or 3 cpus involved.
thanks for the fast responses.
if total = stream + dsp + update, and if stream, dsp, and update are all between 0 and 100f, then how come total is limited to 100f? the documentation states that all 4 numbers are between 0 and 100f.
keeping total between 0 and 100f only works in a single core case, or if all three threads are on the same core… on any multicore CPU w/ any one of the three threads moving to a different core, total will no longer be accurate.
in the extreme case that all 3 threads are on seperate cores and all utilize 100% of the cpu, then we’d have a total of 300. or is total smarter than simply a sum?
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