---
name: "sendme"
section: "8"
platform: "linux"
package: "rt-tests"
version: "1.0-1+b1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/sendme"
---

# sendme(8)

Send a signal from driver to user and measure time intervals

## NAME

**sendme** - Send a signal from driver to user and measure time intervals

## SYNTAX

sendme \[-a\|-a PROC\] \[-b USEC\] \[-l loops\] \[-p PRIO\]

## DESCRIPTION

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.

## OPTIONS

**-a, --affinity\[=PROC\]**
 Run on processor number PROC. If PROC is not specified, run on current processor.
 **-b, --breaktrace=USEC**
 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.
 **-l, --loops=LOOPS**
 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.
 **-p, --prio=PRIO**
 Set the priority of the process.

## FILES

backfire.ko

## EXAMPLES

\# modprobe backfire
 # sendme -a -p99 -l1000000
 Samples:  1000000
 To:   Min    0, Cur    0, Avg    1, Max   11
 From: Min    2, Cur    3, Avg    3, Max   43

## AUTHORS

Carsten Emde \<C.Emde@osadl.org\>

## SEE ALSO

[backfire(4)](/backfire/4.md)