linuxcnc@linuxcnc:/usr/realtime-3.16.0-9-rtai-686-pae/testsuite/kern/latency$ ./run
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* Type ^C to stop this application.
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## RTAI latency calibration tool ##
# period = 100000 (ns)
# avrgtime = 1 (s)
# do not use the FPU
# start the timer
# timer_mode is oneshot

RTAI Testsuite - KERNEL latency (all data in nanoseconds)
RTH|    lat min|    ovl min|    lat avg|    lat max|    ovl max|   overruns
RTD|          0|          0|        887|       8831|       8831|        177
RTD|        206|          0|        897|       7189|       8831|        177
RTD|        356|          0|        905|       9162|       9162|        177
RTD|        281|          0|        909|       9356|       9356|        177
RTD|        386|          0|        913|       9558|       9558|        177
RTD|        383|          0|        910|      12942|      12942|        177
RTD|        295|          0|        913|      12035|      12942|        177
RTD|        284|          0|        896|       8648|      12942|        177
^CRTD|        284|          0|        896|       8648|      12942|        177

linuxcnc@linuxcnc:/usr/realtime-3.16.0-9-rtai-686-pae/testsuite/kern/latency$ dmesg
[ 4414.983644] I-pipe: head domain RTAI registered.
[ 4414.983647] RTAI[hal]: mounted. ISOL_CPUS_MASK: 0, LINUX CPU ISOLATED MAP: 0).
[ 4414.983649] SYSINFO - # CPUs: 4, TIMER NAME: 'lapic', TIMER IRQ: 2305, TIMER FREQ: 102919999, CLOCK NAME: 'tsc', CLOCK FREQ: 3293450000, CPU FREQ: 3293450000, LINUX TIMER IRQ: 2305.
[ 4414.994616] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
[ 4414.994643] , <uses LINUX SYSCALLs>, kstacks pool size = 524288 bytes.
[ 4414.994646] RTAI[sched]: hard timer type/freq = lapic/102919999(Hz); timing: oneshot; linear timed lists.
[ 4414.994648] RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq = 3293450000 hz.
[ 4414.994649] RTAI[sched]: timer setup = 78 ns, resched latency = 0 ns.
[ 4423.632852]

CPU USE SUMMARY
[ 4423.632855] # 0 -> 86222
[ 4423.632856] # 1 -> 0
[ 4423.632857] # 2 -> 0
[ 4423.632858] # 3 -> 0
[ 4423.632859] # 4 -> 0
[ 4423.632860] # 5 -> 0
[ 4423.632861] # 6 -> 0
[ 4423.632861] # 7 -> 0
[ 4423.632862] END OF CPU USE SUMMARY

[ 4423.636685] SCHED releases registered named TASK THRSRV
[ 4423.636691] SCHED releases registered named ALIEN PEDV$D
[ 4423.639214] RTAI[malloc]: unloaded.
[ 4423.738020] RTAI[sched]: unloaded (forced hard/soft/hard transitions: traps 0, syscalls 0).
[ 4423.742010] I-pipe: head domain RTAI unregistered.
[ 4423.742016] RTAI[hal]: unmounted.
linuxcnc@linuxcnc:/usr/realtime-3.16.0-9-rtai-686-pae/testsuite/kern/latency$