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2026-03-14 - 07:20
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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 Sat Mar 14, 2026 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21218212510,84sleep221308-21unixbench_multi19:01:032
21833991233,27cyclictest21840-21sh23:33:480
21833991213,45cyclictest1552-21apt-get19:40:280
218339911933,46cyclictest0-21swapper/000:26:500
218339911515,23cyclictest6164-21sh22:14:120
21833991133,26cyclictest21320-21apt-get21:45:410
218339910924,55cyclictest0-21swapper/023:29:550
21833991087,76cyclictest16314-21apt-get20:25:460
542521070,7sleep20-21swapper/222:12:092
218339910542,56cyclictest4955-21ssh00:00:170
21833991044,31cyclictest8494-21fschecks_count00:05:380
21833991043,32cyclictest30199-21taskset22:53:380
21833991043,32cyclictest30199-21taskset22:53:380
21833991043,23cyclictest31354-21seq23:50:140
218339910430,53cyclictest1202-21ssh22:59:500
218339910415,21cyclictest5652-21sh21:19:560
218339910415,21cyclictest5652-21sh21:19:560
21833991032,24cyclictest17407-21apt-key00:20:210
218339910240,55cyclictest0-21swapper/021:05:390
218339910240,55cyclictest0-21swapper/021:05:390
21833991023,26cyclictest16856-21mailstats22:30:510
21833991023,17cyclictest23517-21apt-get00:30:270
21833991013,46cyclictest336-21ssh21:10:390
21833991003,21cyclictest32381-21/usr/sbin/munin19:35:560
21833991003,20cyclictest10150-21fschecks_count22:20:390
2183399995,14cyclictest31702sleep019:45:340
2183399994,35cyclictest10027-21/usr/sbin/munin20:05:430
2183399994,29cyclictest25799-21rm22:45:500
2183399992,36cyclictest352-21runrttasks23:02:290
2183399987,12cyclictest0-21swapper/023:05:480
2183399982,31cyclictest352-21runrttasks23:15:540
2092329819,43sleep00-21swapper/019:00:560
2183399974,36cyclictest18325-21sort21:40:390
2183399974,36cyclictest18325-21sort21:40:390
2183399973,33cyclictest25382-21grep21:50:530
2183399973,20cyclictest352-21runrttasks20:40:290
2183399973,20cyclictest352-21runrttasks20:40:290
2183399965,28cyclictest24305-21apt-get19:11:140
2183399963,37cyclictest12301-21sshd21:30:380
2183399963,27cyclictest1-21systemd23:38:430
2183399963,20cyclictest15955-21ssh22:30:200
2183399962,33cyclictest20212-21latency_hist00:25:200
2183399962,25cyclictest10368-21sendmail23:15:170
21833999617,7cyclictest0-21swapper/023:22:480
21833999617,7cyclictest0-21swapper/023:22:480
21838999558,10cyclictest181rcu_preempt20:25:371
21833999573,15cyclictest23376-21idleruntime-cro19:10:180
2183399956,10cyclictest0-21swapper/019:35:200
2183399954,33cyclictest27854-21/usr/sbin/munin21:00:350
2183399954,28cyclictest6865-21mailstats21:20:510
2183399953,37cyclictest9079-21/usr/sbin/munin21:25:340
2183399953,32cyclictest19544-21/usr/sbin/munin20:35:390
2183399953,32cyclictest19544-21/usr/sbin/munin20:35:390
2183399953,28cyclictest352-21runrttasks23:55:010
2183399953,20cyclictest18177-21cut20:30:380
2183399953,20cyclictest18177-21cut20:30:380
21833999472,15cyclictest30661-21latency_hist19:30:210
2183399945,28cyclictest22497-21idleruntime22:40:430
2183399944,29cyclictest27372-21latency_hist19:20:200
2183399943,32cyclictest27538-21/usr/sbin/munin19:20:460
2183399943,31cyclictest14454-21/usr/sbin/munin20:20:490
2183399943,30cyclictest352-21runrttasks20:10:520
2183399943,29cyclictest6218-21latency_hist19:55:190
2183399943,29cyclictest6218-21latency_hist19:55:190
2183399943,27cyclictest11521-21fschecks_count00:10:360
2183399943,27cyclictest11521-21fschecks_count00:10:360
2183399943,25cyclictest27653-21uniq21:55:390
2183399942,31cyclictest13055-21tune2fs20:15:370
2183399942,28cyclictest8996-21ssh22:18:400
2183399935,31cyclictest15528-21kernelversion21:35:420
2183399934,33cyclictest352-21runrttasks22:01:400
2183399934,32cyclictest26243-21/usr/sbin/munin20:55:420
2183399934,32cyclictest26243-21/usr/sbin/munin20:55:420
2183399934,26cyclictest26039-21latency_hist20:55:190
21833999336,50cyclictest5256-21/usr/sbin/munin00:00:360
2183399933,34cyclictest23291-21ntpq20:45:450
2183399933,32cyclictest26578-21timerandwakeup23:40:520
2183399933,28cyclictest912-21ssh22:05:310
21838999271,15cyclictest14521-21unixbench_singl22:26:501
21838999262,22cyclictest352-21runrttasks21:37:511
2183399923,28cyclictest7860-21latency_hist20:00:200
2183399913,31cyclictest8902-21grep20:00:530
2183399913,25cyclictest20095-21cat22:35:530
21838999011,70cyclictest19676-21snmpd00:20:591
21843998740,18cyclictest181rcu_preempt22:30:402
21843998658,20cyclictest2561-21threads23:00:532
21843998640,12cyclictest181rcu_preempt23:55:522
2183899863,59cyclictest21358-21taskset21:45:331
21843998567,12cyclictest297-21systemd-logind19:10:212
21843998458,18cyclictest27561-21fschecks_count21:55:382
2184399842,71cyclictest21397-21ssh21:45:402
2183899848,59cyclictest24623-21apt-get20:50:381
21838998459,18cyclictest23666-21apt-config19:10:211
21838998455,8cyclictest181rcu_preempt22:00:211
2183899842,48cyclictest31-21ksoftirqd/123:40:481
21843998328,10cyclictest181rcu_preempt22:45:192
21838998346,14cyclictest181rcu_preempt21:25:211
21838998336,21cyclictest31-21ksoftirqd/123:35:441
21838998326,13cyclictest31-21ksoftirqd/122:17:251
2183899832,50cyclictest31-21ksoftirqd/122:55:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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