原文 :
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Dual Processing Support
A dual CPU system does not automatically increase performance, however. The extent of the performance
benefits depend greatly on whether the programs running can effectively use this increase in CPU power.
Cubase VST is capable of this, but there are also a few important pointers which you should follow to
allow Cubase to use CPU performance effectively.
Why is the CPU's workload so high, even though the Advanced Multi Processor support is being used?
This can depend on one or more of the following factors:
It is always a good idea to load multiple instances of the same plug-in next to each other in the VST rack. If, for example, you are using two HALion units simultaneously, you should load them into neighboring Slots (i.e. slots 1 and 2 instead of 1 and 4). The same is true of send and master effects. Two Reverb32s loaded into slots 2 and 3 use less CPU power than two Reverb32s loaded into
slots 2 and 4. Similarly, the CPU performance is optimized when the same insert effect is used on neighboring mono tracks. This means that structuring your plug-ins effectively is very important.
Please bear the above criteria in mind when organizing your setup.
Generally speaking, of course, more time is needed to perform calculations in parallel. Dual processor
support is only then worthwhile when you have many virtual effects, instruments and channels in your
project at the same time. You should be able to observe a performance increase of 50 – 70% compared
to single processor systems at the same clock speed.
As always, there are also many other factors which play a role such as operating system, audio/MIDI hardware
and even graphic cards. Steinberg has little, if any influence over these. If, for example, the operating
system's scheduler is unable to adequately process requests for the appropriate allocation of calculation processes
to the two CPUs (for whatever reason), the opposite of the beneficial effects of dual processor support may be
observed.
In addition, please don't forget that all of the plug-ins involved should also offer multi-processing support.
There is already a vast range of plug-ins available – it might be the case that not all of the plug-ins in your
setup support this feature.