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2026-03-26 - 01:53
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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 Wed Mar 25, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7530991112,88cyclictest4340-21apt-get10:34:542
75309910250,42cyclictest0-21swapper/211:19:472
75259910134,18cyclictest0-21swapper/109:49:311
7530999863,25cyclictest5087-21apt-key08:34:342
7530999863,25cyclictest5087-21apt-key08:34:342
7530999841,50cyclictest13633-21latency_hist11:44:342
7525999837,9cyclictest0-21swapper/108:19:341
7525999837,9cyclictest0-21swapper/108:19:341
7530999712,13cyclictest0-21swapper/210:44:422
7530999712,13cyclictest0-21swapper/210:44:422
753099934,35cyclictest3778-21/usr/sbin/munin09:39:512
753099924,34cyclictest22646-21latency11:04:562
753099923,37cyclictest27819-21latency_hist08:04:342
753099923,35cyclictest2823-21wc08:25:072
753099923,34cyclictest8586-21latency_hist08:44:342
753099923,33cyclictest5478-21open_inodes11:30:022
753099923,33cyclictest5478-21open_inodes11:30:022
753099923,33cyclictest1680-21sh10:29:592
753099913,36cyclictest18982-21latency_hist10:59:332
753099913,36cyclictest18982-21latency_hist10:59:332
7530999127,10cyclictest0-21swapper/211:59:532
753099912,29cyclictest18417-21fschecks_count09:09:532
753099903,76cyclictest21436-21rm09:14:492
7525999042,17cyclictest181rcu_preempt11:01:361
752199903,35cyclictest15-21ksoftirqd/007:44:330
634629026,33sleep2381ktimers/206:59:592
753099893,35cyclictest24673-21/usr/sbin/munin10:14:572
753099893,34cyclictest31352-21idleruntime-cro12:14:312
753099893,34cyclictest10821-21head09:50:072
753099893,33cyclictest28843-21processes11:15:032
753099893,33cyclictest28843-21processes11:15:032
753099893,33cyclictest15444-21ssh09:04:532
7530998923,25cyclictest32571-21modprobe08:19:312
7530998923,25cyclictest32571-21modprobe08:19:312
7525998954,10cyclictest31-21ksoftirqd/108:35:151
70432897,53sleep17050-21users07:00:191
753099883,38cyclictest352-21runrttasks10:00:212
753099883,38cyclictest352-21runrttasks10:00:212
753099883,38cyclictest27833-21sh10:19:502
753099883,34cyclictest2150-21/usr/sbin/munin12:20:052
753099883,34cyclictest2150-21/usr/sbin/munin12:20:052
753099883,33cyclictest31012-21latency_hist08:14:342
753099883,33cyclictest31012-21latency_hist08:14:342
7530998828,54cyclictest0-21swapper/207:39:572
753099882,32cyclictest16330-21latency_hist07:29:352
753099882,32cyclictest16330-21latency_hist07:29:352
753099882,31cyclictest19709-21latency_hist07:39:342
753099882,31cyclictest19709-21latency_hist07:39:342
7525998847,10cyclictest7512-21cyclictest12:25:471
753099874,35cyclictest21513-21/usr/sbin/munin07:45:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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