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Low Buffer Size/Multi-Processor Issues with Pro Tools 7 on Mac OS X
There is a known issue with low hardware buffer sizes and the multiprocessor RTAS engine of Pro Tools 7 (HD, LE, and M-Powered). Specifically at buffer sizes lower than 512, multiprocessor setups of Pro Tools can show a marked INCREASE in CPU utilization as you enable more processors. While dual processor models also exhibit this behavior somewhat, it is more noticeable with 3 or 4 processors enabled on the Power Mac Quad G5.
Digidesign is aware of the problem, and is actively working on the issue. We have run a number of tests, and while we continue to investigate a fix, our tests have turned up a few situations where this problem is likely to manifest, and a workaround for those scenarios.
At buffer sizes 512 and higher, we recommend you use the maximum number of processors. More processors will give you more cycles to run additional RTAS plug-ins and more tracks with little additional overhead from Pro Tools' management of additional processors.
We recommend the following setting for existing or new sessions that require lower buffer sizes:
In "Setup/Playback Engine" lower "RTAS Processors" to "2 Processors".
If you still see errors, one or more of the following will reduce the CPU utilization below the error threshold:
Make some plug-ins inactive
Make some tracks inactive
If errors still occur, follow the same instructions with one processor enabled
Once you are mixing, you may use all processors, and restore any inactive tracks/plug-ins. You can then increase the HW buffer size to 512 or higher to prevent errors.
We are fully engaged in this investigation and we will update our customers as we have more information.
这里具体说的是什么意思呢？我有点看不明白，谢谢各位帮助！
There is a known issue with low hardware buffer sizes and the multiprocessor RTAS engine of Pro Tools 7 (HD, LE, and M-Powered). Specifically at buffer sizes lower than 512, multiprocessor setups of Pro Tools can show a marked INCREASE in CPU utilization as you enable more processors. While dual processor models also exhibit this behavior somewhat, it is more noticeable with 3 or 4 processors enabled on the Power Mac Quad G5.
Digidesign is aware of the problem, and is actively working on the issue. We have run a number of tests, and while we continue to investigate a fix, our tests have turned up a few situations where this problem is likely to manifest, and a workaround for those scenarios.
At buffer sizes 512 and higher, we recommend you use the maximum number of processors. More processors will give you more cycles to run additional RTAS plug-ins and more tracks with little additional overhead from Pro Tools' management of additional processors.
We recommend the following setting for existing or new sessions that require lower buffer sizes:
In "Setup/Playback Engine" lower "RTAS Processors" to "2 Processors".
If you still see errors, one or more of the following will reduce the CPU utilization below the error threshold:
Make some plug-ins inactive
Make some tracks inactive
If errors still occur, follow the same instructions with one processor enabled
Once you are mixing, you may use all processors, and restore any inactive tracks/plug-ins. You can then increase the HW buffer size to 512 or higher to prevent errors.
We are fully engaged in this investigation and we will update our customers as we have more information.
这里具体说的是什么意思呢？我有点看不明白，谢谢各位帮助！
这是关于多处理器在产生矛盾时的使用说明,在PRO TOOLS 7.0 开始支持多处理器,他的建议是在你使用512后更高缓存的时候,要把处理器的数量调到最大,这样有利于你可以加更多的RTAS.下面告诉你怎样在现有的或新的SESSION下用多处理器:
在"Setup/Playback Engine"lower "RTAS Processors" to "2 Processors".
如果报错的话,就要减少一些CPU的占用
方法是可以使一些PLUG IN 非激活;可以使一些轨道非激活
在MIXING的时候使用所有的处理器并且恢复了一些非激活的轨道或插件的时候,你可以把缓存调到512或更高,来减少错误的发生
在"Setup/Playback Engine"lower "RTAS Processors" to "2 Processors".
如果报错的话,就要减少一些CPU的占用
方法是可以使一些PLUG IN 非激活;可以使一些轨道非激活
在MIXING的时候使用所有的处理器并且恢复了一些非激活的轨道或插件的时候,你可以把缓存调到512或更高,来减少错误的发生
我现在好象就出现了这个问题！正在研究呢！我用的就是G5的那个最高的那款！现在CPU经常说不够用，方法试过很多但还没有解决，非常郁闷，估计是内存太少了！
我要搞大点的内存再试试！现在只有512！
我还是等等看吧 真是比较郁闷啊，花了那么多钱可是用的不好
