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2026-07-21 - 18:54
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7.osadl.org (updated Tue Jul 21, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2647021187,15sleep00-21swapper/006:54:300
269349911036,11cyclictest0-21swapper/211:41:222
2646221056,17sleep20-21swapper/206:54:242
269349910236,16cyclictest27330-21cut12:21:552
269349910236,16cyclictest27330-21cut12:21:552
269349910142,8cyclictest0-21swapper/209:12:102
269349910142,8cyclictest0-21swapper/209:12:102
269349910126,12cyclictest0-21swapper/208:56:562
269349910041,51cyclictest0-21swapper/208:32:042
26934999937,14cyclictest31823-21/usr/sbin/munin09:47:342
26934999935,10cyclictest0-21swapper/210:22:082
26934999935,10cyclictest0-21swapper/210:22:082
26934999739,10cyclictest0-21swapper/209:46:362
26934999638,12cyclictest2567-21latency_hist10:46:362
26934999629,12cyclictest0-21swapper/212:07:072
26934999536,9cyclictest0-21swapper/211:01:572
26934999536,9cyclictest0-21swapper/211:01:572
26934999534,7cyclictest0-21swapper/211:17:252
2693499953,35cyclictest6063-21processes09:57:082
2693499953,35cyclictest6063-21processes09:57:082
26934999425,26cyclictest24345-21grep10:27:112
2664629416,49sleep126660-21munin-run06:56:351
2693499933,36cyclictest29388-21fschecks_count07:01:592
26934999333,11cyclictest0-21swapper/211:31:532
26934999333,11cyclictest0-21swapper/211:31:532
2693499932,34cyclictest8002-21fschecks_count09:06:562
26934999244,39cyclictest0-21swapper/207:31:372
2693499923,35cyclictest20230-21find08:12:082
2693499923,33cyclictest20496-21sort09:27:092
2693499923,30cyclictest352-21runrttasks11:54:232
2693499923,29cyclictest14541-21switchtime09:17:112
2693499914,32cyclictest17154-21grep10:16:372
26934999133,7cyclictest0-21swapper/210:36:362
26934999133,7cyclictest0-21swapper/210:36:362
2693499912,36cyclictest3217-21cut10:46:592
2693499912,36cyclictest3217-21cut10:46:592
2693499912,35cyclictest16890-21fschecks_count09:21:542
2693499912,34cyclictest23432-21cut08:22:082
2693499912,32cyclictest6093-21latency_hist11:46:362
26934999056,24cyclictest16285-21latency_hist08:01:372
2693499903,36cyclictest14979-21latency_hist12:01:362
2693499903,36cyclictest14979-21latency_hist12:01:362
2693499903,35cyclictest30649-21modprobe08:46:342
2693499903,35cyclictest30649-21modprobe08:46:342
2693499903,31cyclictest352-21runrttasks11:24:182
2693499903,31cyclictest352-21runrttasks11:24:182
2693499903,31cyclictest27585-21ps11:27:082
2693499902,34cyclictest15508-21mailstats11:07:092
26907999067,17cyclictest15383-21sh11:07:071
2693499893,32cyclictest27940-21fschecks_time08:36:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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