User`s guide

MTA_PARAMS [G]
The environment variable MTA_PARAMS is used by the Cray XMT user runtime. The
following list contains the values that you can set for MTA_PARAMS.
debug_data_prot
Waits for the debugger to attach rather than exiting when a data
protection or poison error occurs. This parameter is useful while
troubleshooting a specific problem. However, Cray does not
recommend that you use this parameter during normal operations
because any error that occurs causes the runtime to wait for the
debugger to attach. This results in the runtime holding on to
resources previously used by the program.
do_backtrace
Dumps registers of all active streams when a trap occurs. This
parameter may be useful during troubleshooting, although it
generates a lot of information. If the runtime system has become
corrupted, the registers may fail to dump.
echo Prints a list of parameters to the screen. This parameter toggles on
and off.
exit_on_trace_fail
Sets the default behavior to kill the program execution when tracing
fails to initialize.
ft_traps options
Enables various floating-point traps depending upon which options
you set. See the section of Programming Considerations for
Floating-point Operations in Cray XMT Programming Model.You
can select from the following list of options:
i Invalid. Traps invalid floating-point numbers.
z Zero-divide. Traps operations that are attempting to
divide a floating-point number by 0.0. This type of
operation would create a NaN.
o Overflow. Traps overflows that occur.
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