Stress Test: ser

TEST NAME

ser_rdwt - test serial I/O read/write functions

SYNOPSIS

ser_rd -d devicename -b baudrate

ser_wt -d devicename -b baudrate

DESCRIPTION

ser_rdwt sets the terminal parameter with the requested baud rate using the standard ioctl(2) system call. ser_rdwt then sets up two channels to transfer and receive data for the duration (in seconds) specified by the RUNTIME environment variable.

ser_rd transmits data until RUNTIME seconds have elapsed or until a transmission error occurs.

ser_wt receives data until RUNTIME seconds have elapsed or until an reception error occurs.

OPTIONS

-b baudrate

Baud rate. This must be one of the baud rates specified for CBAUD in the termio(7I) man page, such as 38400 or 76800.

-d devicename

Device for communication. Use a full path for devicename. Dialout device paths typically start with /dev/cua/.

DURATION

About 4 hours

POSSIBLE CONCURRENT TESTS

No other concurrent tests are possible on the devicename port.

EXAMPLES

If:

Receiver device is /dev/cua/a

Transmitter device is /dev/cua/b

Receiver baud rate is 38400

Transmitter baud rate is 38400

Then, on the receiver side:
# ser_rd -d /dev/cua/a -b 38400
# ser_wt -d /dev/cua/a -b 38400
On the transmitter side:

# ser_wt -d /dev/cua/b -b 38400 (to test serial I/O write function)
# ser_rd -d /dev/cua/b -b 38400 (to test serial I/O read function)

Note: The receiver device and the transmitter device must be on different machines, but they must be physically connected.

REFERENCES

termio(7I)