Core Audio & DP Performance
Core Audio & DP Performance
- Subject: Core Audio & DP Performance
- From: Lubor Prikryl <email@hidden>
- Date: Fri, 18 Apr 2003 22:58:11 +0200
Hi,
although this is a bit off topic of development interests, maybe it is
important.
I tested the same reverb algorithm on various systems, the criteria
were the maximum effects before clicks appeared.
The tested plugin DS-RV1 is available with our GT Player on Apple OS X
downloads site.
Buffer size 128 samples, PC uses ASIO drivers
The result is a maximum number of processing reverbs.
iMac G4 800MHz / MOTU828 7
Silver G4 733/ MAudio Delta 2496 AP 6
Dual G4 1.4GHz / MAudio Delta 2496 AP 12
Celeron 1.2 GHz / MAudio Delta 2496 AP 10
P4 1.8 GHz / MAudio Delta 2496 AP 16
The problem of DP G4 is:
Both processors are loaded in average by the same load. But the load is
fluctuating from one processor to the second, so in certain moments one
runs with very low and the second with very extensive load.
The maximum overall load is very far from the 85%-90% of single CPU
machine (of course).
The application itself (GT Player) runs GUI (e.g. meters) in one
thread, event loop in another one, midi and audio with their
time-constrained threads. Can developer schedule threads to make
performance of both processors more "stable"???
Lubor, DSound
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