eldo_user

Running Eldo
Running Eldo in 32-bit and 64-bit Modes
Running Eldo in 32-bit and 64-bit Modes
Eldo is available as 32-bit and 64-bit versions for Linux platforms. The 64-bit version enables
simulation of circuits which would require more than 2GB of memory, and which would
therefore not work on 32-bit machines. 64-bit mode is the default.
32-bit and 64-bit AMS software installed
If you have both 32-bit and 64-bit AMS software installed, by default Eldo and Eldo RF are
launched in 32-bit mode on 32-bit platforms and 64-bit mode on 64-bit platforms.
There are two ways to run 32-bit mode on 64-bit platforms:
• Specify the -32b command line argument; this overrides the setting of environment
variable $AMS_VCO_MODE.
• Set the environment variable AMS_VCO_MODE to the value 32, for example:
setenv AMS_VCO_MODE 32
To return to 64-bit mode: unset AMS_VCO_MODE or set it to 64; or specify the -64b
command line argument; this overrides the setting of environment variable
$AMS_VCO_MODE.
64-bit AMS software only installed
If you only have 64-bit AMS software installed, by default Eldo and Eldo RF are launched in
64-bit mode on a 64-bit platform. If you attempt to switch to 32-bit mode, an error will be
generated.
32-bit AMS software only installed
If you only have 32-bit AMS software installed, you can only run in 32-bit mode. If you attempt
to switch to 64-bit mode, an error will be generated.
Tip
See the “-32b” and “-64b” command line arguments in the Eldo Reference Manual.
Related Topics
Invoking Eldo
Multi-Threading Eldo Simulations
Eldo Initialization File
Multi-Threading Eldo Simulations
If you are using a multi-processor machine, you can instruct the Eldo simulator to share
computer resources to speed up simulation. This is known as multi-threading, and can be
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Eldo® User's Manual, 15.3