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2026-05-13 - 15:25
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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 May 13, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15291213514,79sleep015373-21grep06:57:020
15291213514,79sleep015373-21grep06:57:020
1496021199,80sleep214994-21grep06:56:522
1496021199,80sleep214994-21grep06:56:522
159509910435,14cyclictest0-21swapper/209:36:172
15950991043,38cyclictest31501-21cut07:46:362
159509910358,12cyclictest181rcu_preempt10:51:282
15950991013,35cyclictest4069-21kernelversion10:16:402
15950991002,40cyclictest23278-21latency_hist09:01:182
1595099973,38cyclictest20047-21grep07:11:372
15950999733,12cyclictest0-21swapper/211:41:302
15950999733,12cyclictest0-21swapper/211:41:302
15950999732,12cyclictest0-21swapper/209:31:182
15950999732,12cyclictest0-21swapper/209:31:182
15950999730,12cyclictest0-21swapper/208:36:372
15950999718,33cyclictest26366-21sh09:06:262
15950999718,33cyclictest26366-21sh09:06:262
1595099963,40cyclictest7745-21fschecks_count11:17:242
15950999622,32cyclictest27601-21sshd07:33:342
15950999622,32cyclictest27601-21sshd07:33:342
15950999536,11cyclictest0-21swapper/207:36:312
15950999536,11cyclictest0-21swapper/207:36:312
1595099953,39cyclictest10544-21fschecks_time11:21:382
1595099953,39cyclictest10544-21fschecks_time11:21:382
15940999535,44cyclictest1300-21latency_hist12:01:160
15950999434,11cyclictest15927-21cyclictest08:27:582
1595099943,34cyclictest32302-21latency_hist09:16:182
1594099949,37cyclictest0-21swapper/009:21:290
1595099933,38cyclictest26158-21latency_hist07:31:182
1595099933,38cyclictest26158-21latency_hist07:31:182
1595099933,36cyclictest20808-21grep08:51:492
1595099933,36cyclictest20808-21grep08:51:492
1595099924,35cyclictest352-21runrttasks07:20:322
1595099923,43cyclictest949-21netstat07:51:432
15944999272,10cyclictest291rcuc/112:26:281
1595099917,46cyclictest27627-21kworker/u17:2+flush-179:008:31:292
1595099914,39cyclictest13066-21latency10:31:402
1595099914,39cyclictest13066-21latency10:31:402
1595099913,38cyclictest18385-21fschecks_time09:46:372
1595099913,35cyclictest17874-21latency_hist09:46:172
1595099903,42cyclictest12385-21fschecks_count09:36:372
1595099893,38cyclictest626-21/usr/sbin/munin10:11:382
15940998965,18cyclictest21869-21sh11:41:170
15950998834,10cyclictest0-21swapper/210:41:172
1595099882,41cyclictest352-21runrttasks07:05:442
15944998869,13cyclictest544-21cron10:26:151
15944998869,13cyclictest544-21cron10:26:151
15944998856,8cyclictest181rcu_preempt11:55:491
15944998856,8cyclictest181rcu_preempt11:55:491
1594499883,47cyclictest31-21ksoftirqd/111:38:101
1595099862,36cyclictest547-21interrupts09:16:382
1595099862,36cyclictest547-21interrupts09:16:382
15950998611,35cyclictest22064-21timerwakeupswit09:51:512
15944998639,32cyclictest26479-21apt-get07:31:331
15944998639,32cyclictest26479-21apt-get07:31:331
15940998665,15cyclictest3693-21sendmail11:11:140
15944998562,14cyclictest3538-21runrttasks09:21:391
15944998557,8cyclictest181rcu_preempt08:56:391
15940998556,21cyclictest26164-21latency_hist09:06:180
15940998556,21cyclictest26164-21latency_hist09:06:180
1595099844,40cyclictest1228-21latency_hist12:01:172
15944998454,8cyclictest181rcu_preempt11:06:181
15944998450,14cyclictest181rcu_preempt09:54:131
15940998419,12cyclictest21137-21munin-run07:16:150
15950998351,23cyclictest22406-21threads10:46:502
15950998351,23cyclictest22406-21threads10:46:502
15944998324,37cyclictest24722-21ntpq09:56:441
1594099839,31cyclictest0-21swapper/009:31:530
15940998266,10cyclictest23294-21runrttasks07:21:390
15950998150,21cyclictest1-21systemd11:39:442
15944998154,20cyclictest13101-21cron12:21:141
1594499813,55cyclictest13638-21apt-get08:31:291
15944998054,9cyclictest181rcu_preempt11:56:301
1594499803,43cyclictest31-21ksoftirqd/107:41:311
1594499803,43cyclictest31-21ksoftirqd/107:41:311
1594099804,36cyclictest6697-21latency_hist11:16:190
1594099804,36cyclictest6697-21latency_hist11:16:190
15940998027,32cyclictest0-21swapper/007:06:540
1595099792,50cyclictest17272-21grep11:31:512
1595099792,50cyclictest17272-21grep11:31:512
15944997961,13cyclictest27461-21sh10:01:381
15944997959,10cyclictest0-21swapper/110:16:471
15944997958,7cyclictest181rcu_preempt10:47:091
15944997958,7cyclictest181rcu_preempt10:47:091
15944997955,9cyclictest181rcu_preempt08:46:401
15944997955,8cyclictest181rcu_preempt10:30:481
15944997940,8cyclictest181rcu_preempt09:41:371
15944997940,12cyclictest20321-21/usr/sbin/munin07:11:441
15944997940,11cyclictest0-21swapper/111:49:371
15940997955,17cyclictest1820-21fschecks_time12:01:370
15940997953,19cyclictest21276-21sh10:46:170
15940997916,16cyclictest26090-21latency_hist07:31:170
15940997916,16cyclictest26090-21latency_hist07:31:170
1455227926,34sleep30-21swapper/306:56:373
1455227926,34sleep30-21swapper/306:56:373
15950997848,20cyclictest19039-21latency_hist12:31:172
15944997853,9cyclictest181rcu_preempt12:21:501
15944997853,8cyclictest181rcu_preempt07:16:321
15944997849,8cyclictest181rcu_preempt07:31:191
15944997849,8cyclictest181rcu_preempt07:31:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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