The program sendme uses the backfire driver to send a signal from driver to user. It then reads the timestamp from the driver and calculates the time intervals to call the driver and to receive the signal from the driver.
Run on procesor number PROC. If PROC is not specified, run on current processor.
Send break trace command when latency > USEC. This is a debugging option to control the latency tracer in the realtime preemption patch.
It is useful to track down unexpected large latencies on a system.
Set the number of loops. The default is 0 (endless). This option is useful for automated tests with a given number of test cycles. Sendme is stopped once the number of timer intervals has been reached.
Set the priority of the process.
# modprobe backfire
# sendme -a -p99 -l1000000
To: Min 0, Cur 0, Avg 1, Max 11
From: Min 2, Cur 3, Avg 3, Max 43