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2026-04-15 - 07:59
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Wed Apr 15, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247021860,22sleep00-21swapper/018:58:530
32529911153,50cyclictest0-21swapper/219:03:142
290621066,18sleep10-21swapper/119:00:391
3252991055,40cyclictest5085-21ssh00:28:222
32529910450,46cyclictest13958-21idleruntime-cro22:03:092
32529910135,29cyclictest13504-21cron19:33:102
3252999951,12cyclictest181rcu_preempt22:07:432
3252999951,12cyclictest181rcu_preempt22:07:432
3252999842,12cyclictest17212-21open_files23:54:222
3252999842,12cyclictest17212-21open_files23:54:222
3237999772,19cyclictest25920-21runrttasks20:08:460
3237999772,19cyclictest25920-21runrttasks20:08:460
316872970,8sleep10-21swapper/100:18:331
325299964,40cyclictest31694-21latency_hist20:28:122
325299964,37cyclictest352-21runrttasks22:58:372
325299964,37cyclictest352-21runrttasks22:58:372
325299963,45cyclictest26393-21grep00:08:462
3252999634,10cyclictest0-21swapper/222:30:022
325299962,38cyclictest9272-21timerwakeupswit21:53:462
3252999563,23cyclictest6803-21cron19:13:102
325299954,34cyclictest23610-21switchtime21:23:462
325299954,33cyclictest5022-21munin-node22:13:202
3252999542,45cyclictest0-21swapper/200:18:372
3252999535,9cyclictest0-21swapper/221:13:382
325299953,34cyclictest10445-21ssh22:49:272
325299952,36cyclictest20492-21ssh21:18:442
3252999447,40cyclictest0-21swapper/200:24:462
325299943,42cyclictest19397-21ssh23:03:472
325299943,42cyclictest19397-21ssh23:03:472
3252999433,13cyclictest0-21swapper/220:38:102
325299942,41cyclictest25047-21rm00:08:102
3237999451,32cyclictest0-21swapper/019:13:310
325299934,41cyclictest352-21runrttasks21:43:412
3252999342,43cyclictest0-21swapper/220:08:122
3252999336,50cyclictest0-21swapper/219:43:252
325299933,39cyclictest31567-21sh21:38:122
325299933,33cyclictest3938-21latency_hist20:43:122
325299933,32cyclictest14124-21unixbench_multi23:48:472
325299924,39cyclictest15192-21latency_hist22:58:122
325299924,32cyclictest11010-21fschecks_time21:03:332
325299923,41cyclictest22066-21latency_hist00:03:112
325299923,35cyclictest21778-21latency_hist19:58:122
325299923,35cyclictest21778-21latency_hist19:58:122
3252999227,11cyclictest0-21swapper/222:43:462
3252999227,11cyclictest0-21swapper/222:43:462
3237999272,12cyclictest0-21swapper/022:58:430
3237999272,12cyclictest0-21swapper/022:58:430
3237999271,10cyclictest0-21swapper/022:29:230
3252999164,20cyclictest23741-21kworker/u18:2+flush-179:019:23:372
325299914,33cyclictest5792-21/usr/sbin/munin20:48:302
325299914,30cyclictest10204-21latency_hist19:23:122
325299913,37cyclictest29440-21ssh00:13:472
325299913,37cyclictest25146-21taskset23:14:272
3252999133,11cyclictest0-21swapper/221:28:482
3252999127,13cyclictest0-21swapper/220:08:432
3252999127,13cyclictest0-21swapper/220:08:432
325299912,36cyclictest26750-21cpu20:13:262
325299912,36cyclictest26750-21cpu20:13:262
323799913,45cyclictest24601-21apt-get23:13:240
325299905,31cyclictest352-21runrttasks19:03:262
325299904,32cyclictest352-21runrttasks19:33:222
325299903,36cyclictest10368-21fschecks_time23:43:292
325299903,33cyclictest20030-21latency_hist22:13:112
325299903,31cyclictest8783-21modprobe20:58:102
3252999027,10cyclictest0-21swapper/219:13:212
3241999067,13cyclictest0-21swapper/120:18:111
3241999067,13cyclictest0-21swapper/120:18:111
3237999070,13cyclictest2952-21systemd-journal21:42:320
3237999070,13cyclictest2952-21systemd-journal21:42:320
325299894,38cyclictest1065-21/usr/sbin/munin23:28:562
325299893,36cyclictest22036-21grep23:08:442
325299893,35cyclictest31751-21acpi21:38:202
325299893,35cyclictest31751-21acpi21:38:202
325299893,33cyclictest13873-21cstates21:08:292
325299893,33cyclictest13873-21cstates21:08:292
3252998927,19cyclictest0-21swapper/220:28:362
3252998925,13cyclictest0-21swapper/222:42:322
3252998925,13cyclictest0-21swapper/222:42:322
325299892,35cyclictest4425-21fschecks_time20:43:322
3241998969,13cyclictest0-21swapper/121:58:131
3241998965,16cyclictest2952-21systemd-journal20:01:321
3241998965,11cyclictest0-21swapper/120:08:121
3237998967,12cyclictest0-21swapper/019:38:270
323799893,47cyclictest352-21runrttasks23:54:100
323799893,47cyclictest352-21runrttasks23:54:100
325299884,37cyclictest352-21runrttasks23:36:542
325299884,37cyclictest23396-21latency_hist20:03:122
325299884,35cyclictest18852-21fschecks_time19:48:312
3252998835,10cyclictest0-21swapper/223:40:132
3252998835,10cyclictest0-21swapper/223:40:132
325299883,38cyclictest27555-21/usr/sbin/munin23:18:252
325299883,38cyclictest23519-21uniq22:18:312
325299883,33cyclictest29935-21latency_hist20:23:122
325299883,25cyclictest26540-21rm22:23:332
3241998872,9cyclictest12214-21sh22:53:131
3241998861,18cyclictest28047-21latency23:18:351
3241998847,28cyclictest31521-21modprobe20:28:091
325299874,32cyclictest30968-21ssh23:23:332
3241998766,11cyclictest0-21swapper/119:53:131
3241998764,13cyclictest0-21swapper/121:58:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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