在下面给出的代码中,有一个简单的Linux内核模块(驱动程序),它add_timer以1 jiffy的分辨率重复调用一个函数10次(也就是说,计时器计划发射jiffies + 1).使用该bash脚本rerun.sh,然后从打印输出中获取时间戳syslog,并使用它来显示它们gnuplot.
在大多数情况下,我得到这样的syslog输出:
[ 7103.055787] Init testjiffy: 0 ; HZ: 250 ; 1/HZ (ms): 4
[ 7103.056044] testjiffy_timer_function: runcount 1
[ 7103.060045] testjiffy_timer_function: runcount 2
[ 7103.064052] testjiffy_timer_function: runcount 3
[ 7103.068050] testjiffy_timer_function: runcount 4
[ 7103.072053] testjiffy_timer_function: runcount 5
[ 7103.076036] testjiffy_timer_function: runcount 6
[ 7103.080044] testjiffy_timer_function: runcount 7
[ 7103.084044] testjiffy_timer_function: runcount 8
[ 7103.088060] testjiffy_timer_function: runcount 9
[ 7103.092059] testjiffy_timer_function: runcount …