Answers Database

Kernel Limitations May Cause Out of Memory Problems on the HP Platform


Record #1736

Problem Title:
Kernel Limitations May Cause Out of Memory Problems on the HP Platform


Problem Description:
Platform(s): HP only
Architecture(s): All
Design Step(s): Installation
Reference Number: 13530
Out of memory problems on the HP platform may be caused by
kernel limitations. The default HP kernel is configured to allow only
a maximum allocated swap space per process of 64MB. This size
might not be sufficient when working with some of the larger Xilinx
devices.


Solution 1:

The System Administrator may need to reconfigure the UNIX kernel
to use more than the default values. Some recommended sizes for
specific parameters are as follows:
maxdsiz = default 64MB changed to ---->640MB
maxtsiz = default 64MB changed to ---->640MB
maxssiz = 8MB -----> 64MB
maxupr = 75 ----->100
These parameters indicate the maximum amount of memory for any
one process.
The parameter maxdsiz is the data partition (allocated data space).
The parameter maxtsiz is the text partition (actual program size).
The parameter maxssiz is the stack partition (recursive calls).
The parameter maxupr is the maximum number of user processes.



End of Record #1736