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Chapter 3 - Previous releases

46 Version 1.6.2a.0 May 17, 2011

Features

NWare

 Incremental compilation

There is a new option for compiling a project: incremental compilation.

By default, each time a project is emulate or deployed, the NWare compiler recalculates the

optimal allocation of processing tasks to available DSPs within a NioNode. With many

devices in a large project, this process is extremely complex, and can mean emulation or

deployment takes a long time. To increase the speed, you can use the incremental compilation

feature. This instructs the compiler to only calculate DSP assignments for new devices that

have been added to the design since the last successful compile. The other devices remain

assigned to DSPs as they were previously. This may result in a slightly higher DSP usage

figure than an optimal compile, but will take a fraction of the time.

Notes

 If a device has been assigned to a DSP manually by the user, this assignment will be kept

regardless of whether the incremental compilation feature has been selected.

 If you use the incremental compilation feature with a very large project, with a very large

number of devices, it may not succeed. Perform an optimal compile instead.

 If a compilation fails when incremental compilation is switched on, the user is given the

option to perform a full compile. If the incremental compile failed due to resource

limitations, the full compile may succeed. However, if the incremental compile failed for

another reason, such as a feedback loop in the design, a full compile will not succeed.

 If the incremental compile fails, the message box that prompts the user to perform a full

compile can sometimes be displayed behind other windows on the screen.

 Due to the complexity of the compile process, it is possible, although unlikely, that an

incremental compile will succeed, but a full compile will fail.

Tips:

 Incremental compilation requires spare DSP resources in order to function. As the

utilization of each DSP in a NION increases, an incremental compile is less likely to

succeed. We therefore recommend that you do not use 100% of the processing capacity of

each NION when using incremental compile.

 To get the lowest possible DSP usage and latency figures for a design, ensure that

incremental compile is switched off before emulating or deploying, but be aware that the

compilation process may take a long time for a large design.

 We recommend that you always do a full compile before finalizing the installation and

leaving the customer site.

To select incremental compile mode, click the Incremental Compilation button

on the

NWare toolbar before compiling. When the button is pressed in, this indicates that the mode

has been selected.

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MediaMatrix nTouch 60 Especificações Página 50