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2026-06-02 - 13:26
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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 Tue Jun 02, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
993721080,4sleep19941-21wc23:40:301
993721080,4sleep19941-21wc23:40:301
1638210113,47sleep00-21swapper/018:55:320
2607999818,51cyclictest39-21ksoftirqd/220:30:342
2599999738,30cyclictest0-21swapper/000:00:410
2603999470,15cyclictest25961-21ssh21:25:381
2603999468,19cyclictest2590-21cyclictest19:14:561
2603999458,12cyclictest181rcu_preempt23:20:501
2607999358,25cyclictest277-21dbus-daemon21:34:562
260399938,66cyclictest13882-21apt-get22:00:131
2603999375,10cyclictest0-21swapper/121:30:221
2603999220,54cyclictest12514-21sh23:45:181
2603999220,54cyclictest12514-21sh23:45:181
2599999174,11cyclictest2590-21cyclictest00:19:160
2599999119,34cyclictest28073-21sh22:23:320
2607999071,13cyclictest4596-21kworker/u19:0+flush-179:022:00:302
2599999011,56cyclictest27682-21/usr/sbin/munin20:15:330
2607998871,11cyclictest14933-21latency22:55:232
2599998825,31cyclictest0-21swapper/000:27:310
259999876,55cyclictest14606-21cstates22:55:140
2599998725,38cyclictest0-21swapper/022:44:580
2599998714,27cyclictest0-21swapper/020:20:120
2599998711,42cyclictest6180-21modprobe19:09:560
2607998651,12cyclictest181rcu_preempt20:08:542
2603998669,12cyclictest2590-21cyclictest20:40:321
259999867,47cyclictest29680-21ssh00:13:410
2599998637,30cyclictest0-21swapper/021:25:260
2599998628,23cyclictest0-21swapper/022:15:240
2599998620,47cyclictest0-21swapper/023:37:210
2603998558,13cyclictest0-21swapper/123:05:221
2599998523,22cyclictest5432-21ntpq20:45:280
260399843,34cyclictest1599-21ssh21:40:051
260399843,34cyclictest1599-21ssh21:40:051
2599998424,54cyclictest0-21swapper/021:15:120
2599998413,50cyclictest0-21swapper/022:46:540
2599998413,50cyclictest0-21swapper/022:46:540
122028411,38sleep10-21swapper/118:55:161
2607998317,37cyclictest39-21ksoftirqd/221:22:022
2607998314,42cyclictest39-21ksoftirqd/221:13:302
2603998358,16cyclictest20125-21latency_hist23:04:591
2603998340,11cyclictest181rcu_preempt22:35:081
2603998340,11cyclictest181rcu_preempt22:35:081
260799822,57cyclictest12484-21ssh23:45:142
260799822,57cyclictest12484-21ssh23:45:142
2603998261,15cyclictest15360-21proc_pri19:35:301
2603998261,15cyclictest15360-21proc_pri19:35:301
259999824,62cyclictest20405-21latency22:10:230
2599998219,26cyclictest1579-21runrttasks21:40:000
2599998219,26cyclictest1579-21runrttasks21:40:000
2599998216,41cyclictest13264-21ssh21:59:460
2599998212,28cyclictest13829-21grep19:30:300
2599998212,28cyclictest13829-21grep19:30:300
2607998150,11cyclictest181rcu_preempt20:48:272
260799814,45cyclictest39-21ksoftirqd/221:00:552
2603998157,16cyclictest13913-21unixbench_singl21:05:371
2603998156,9cyclictest24428-21ssh00:05:071
2603998132,12cyclictest18615-21sh23:55:131
2603998132,12cyclictest18615-21sh23:55:131
260399812,33cyclictest31-21ksoftirqd/123:35:121
259999818,35cyclictest14422-21fschecks_time22:00:540
2599998115,30cyclictest9006-21ssh21:51:120
2599998115,30cyclictest9006-21ssh21:51:120
2599998115,27cyclictest0-21swapper/022:35:100
2599998115,27cyclictest0-21swapper/022:35:100
2607998060,14cyclictest19717-21threads21:15:322
2603998048,9cyclictest181rcu_preempt22:08:421
2603998048,9cyclictest181rcu_preempt22:08:421
259999807,41cyclictest18282-21switchtime23:00:320
259999806,38cyclictest17403-21ssh21:11:470
2599998055,19cyclictest18133-21sh23:54:550
2599998021,18cyclictest7816-21modprobe19:14:560
2599998019,23cyclictest0-21swapper/023:49:570
2599998019,23cyclictest0-21swapper/023:49:570
2599998016,24cyclictest0-21swapper/021:08:320
2599998011,28cyclictest21496-21grep19:55:170
2599998011,28cyclictest21496-21grep19:55:170
260799797,30cyclictest39-21ksoftirqd/219:52:532
2607997960,14cyclictest544-21cron20:14:562
2607997952,18cyclictest1-21systemd22:23:152
2603997946,9cyclictest181rcu_preempt20:14:591
2603997925,30cyclictest0-21swapper/122:25:091
2603997912,32cyclictest0-21swapper/121:47:501
2599997917,22cyclictest1073-21seq20:30:350
2599997916,26cyclictest2236-21rm23:28:110
2599997916,23cyclictest24315-21sh23:10:260
2599997914,24cyclictest4105-21seq19:04:370
2599997912,25cyclictest1609-21/usr/sbin/munin00:20:280
2599997911,27cyclictest10023-21/usr/sbin/munin21:00:150
2599997911,25cyclictest18951-21grep19:45:330
2607997860,13cyclictest8930-21sh23:39:572
2607997860,12cyclictest3938-21mailstats20:40:282
2607997857,15cyclictest12881-21cpu21:05:162
2607997840,21cyclictest29846-21ntp_states20:20:272
260399783,48cyclictest31141-21fschecks_time20:25:191
260399783,48cyclictest31141-21fschecks_time20:25:191
259999788,42cyclictest2374-21systemd-journal23:23:150
2599997814,30cyclictest31893-21/usr/sbin/munin22:30:130
2607997761,10cyclictest9078-21awk19:15:342
2607997748,7cyclictest181rcu_preempt19:33:502
2607997748,7cyclictest181rcu_preempt19:33:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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