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2025-10-18 - 08:09
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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
Characteristics of the 100 highest latencies:
System rackcslot2.osadl.org (updated Sat Oct 18, 2025 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1734521050,2sleep11660299cyclictest00:27:151
1466427665,7sleep00-21swapper/019:02:050
1621927158,9sleep10-21swapper/119:04:551
16602993434,0cyclictest0-21swapper/122:32:511
1660299330,1cyclictest91rcu_preempt20:47:151
1660299303,2cyclictest91rcu_preempt22:17:151
16602993023,2cyclictest24-21ksoftirqd/122:05:101
16602993011,0cyclictest28167-21kworker/u4:022:37:441
1660299300,2cyclictest0-21swapper/123:12:531
1660299296,3cyclictest24-21ksoftirqd/123:22:171
16602992923,4cyclictest24-21ksoftirqd/121:37:001
16602992910,18cyclictest0-21swapper/122:55:161
16602992910,15cyclictest0-21swapper/100:01:241
16601992928,0cyclictest0-21swapper/000:17:570
1660199292,26cyclictest0-21swapper/000:34:540
16601992920,8cyclictest9401-21apache221:43:370
16602992826,1cyclictest24-21ksoftirqd/120:57:591
16601992819,9cyclictest0-21swapper/022:13:570
16602992726,0cyclictest24-21ksoftirqd/122:26:551
1660299272,3cyclictest91rcu_preempt23:17:191
16602992710,15cyclictest0-21swapper/123:37:311
1660299270,26cyclictest0-21swapper/100:12:171
1660299270,1cyclictest3817-21grep21:57:171
1660299265,2cyclictest91rcu_preempt20:46:251
16601992622,1cyclictest81ktimersoftd/023:11:490
1660199261,22cyclictest0-21swapper/019:17:070
1660199260,16cyclictest0-21swapper/023:22:220
16602992524,1cyclictest24-21ksoftirqd/122:42:181
1660299252,10cyclictest91rcu_preempt22:27:331
16602992520,2cyclictest24-21ksoftirqd/119:53:341
16602992514,5cyclictest636-21nscd21:50:391
1660299250,3cyclictest0-21swapper/121:08:161
1660299250,24cyclictest30409-21kworker/u4:122:12:431
1660199253,21cyclictest0-21swapper/023:45:190
1660199253,21cyclictest0-21swapper/022:24:290
1660199250,25cyclictest0-21swapper/023:03:110
1660199250,1cyclictest0-21swapper/019:55:130
1660299247,3cyclictest91rcu_preempt23:09:291
1660299243,4cyclictest24-21ksoftirqd/121:16:581
16602992424,0cyclictest24-21ksoftirqd/122:48:351
1660299242,3cyclictest11175-21apache_processe20:17:131
16602992423,0cyclictest24-21ksoftirqd/122:57:441
16602992422,1cyclictest24-21ksoftirqd/122:10:181
1660299242,17cyclictest0-21swapper/123:54:291
16602992418,4cyclictest9401-21apache223:28:061
16602992418,2cyclictest24-21ksoftirqd/100:07:181
16602992413,5cyclictest24-21ksoftirqd/100:32:521
1660299241,2cyclictest91rcu_preempt21:27:531
16602992411,7cyclictest24-21ksoftirqd/121:26:241
16602992310,8cyclictest0-21swapper/100:02:151
16602992310,6cyclictest0-21swapper/121:37:121
16602992310,2cyclictest0-21swapper/123:51:551
1660299230,20cyclictest0-21swapper/119:42:161
1660299230,16cyclictest0-21swapper/119:22:141
1660199235,12cyclictest0-21swapper/000:22:130
1660199235,10cyclictest0-21swapper/021:47:140
16601992318,3cyclictest9385-21apache222:38:050
16601992314,5cyclictest23570-21snmpd20:50:470
16601992313,8cyclictest9385-21apache221:27:560
16602992222,0cyclictest24-21ksoftirqd/121:19:251
16602992222,0cyclictest24-21ksoftirqd/120:52:131
16602992220,1cyclictest14129-21/usr/sbin/munin00:22:151
16602992217,5cyclictest9401-21apache220:14:291
16602992216,4cyclictest9401-21apache221:53:491
16602992216,4cyclictest692-21ntpd21:43:281
1660299220,1cyclictest10100-21apache_accesses23:32:141
1660299220,0cyclictest91rcu_preempt21:02:131
1660199224,6cyclictest0-21swapper/021:22:550
1660199222,19cyclictest0-21swapper/019:58:470
16601992221,1cyclictest0-21swapper/023:49:130
16601992216,2cyclictest16599-21cyclictest23:21:280
16601992212,10cyclictest0-21swapper/021:03:530
16601992210,6cyclictest0-21swapper/023:32:220
1660299216,6cyclictest91rcu_preempt23:03:211
1660299213,10cyclictest91rcu_preempt23:45:451
16602992118,3cyclictest0-21swapper/119:57:141
16602992117,2cyclictest24-21ksoftirqd/100:19:571
16602992113,3cyclictest24-21ksoftirqd/119:08:381
16602992110,7cyclictest0-21swapper/119:49:551
1660199213,7cyclictest0-21swapper/022:17:210
1660199212,11cyclictest0-21swapper/019:47:170
16601992111,5cyclictest24318-21apache_volume19:27:130
16601992110,7cyclictest0-21swapper/022:00:060
16601992110,6cyclictest97850irq/107-eth1-rx22:09:240
16601992110,4cyclictest0-21swapper/021:17:390
172772200,1sleep117281-21hwlatdetect20:32:161
1660299202,4cyclictest91rcu_preempt20:22:151
16602992010,4cyclictest0-21swapper/120:02:211
1660199209,6cyclictest9385-21apache220:07:130
1660199203,11cyclictest0-21swapper/020:22:200
16601992016,4cyclictest9385-21apache223:13:130
1660199201,18cyclictest0-21swapper/019:09:150
16601992011,2cyclictest29495-21if_eth223:57:160
16601992010,7cyclictest9401-21apache200:13:390
16601992010,7cyclictest0-21swapper/023:41:360
16601992010,5cyclictest0-21swapper/021:07:150
16601992010,3cyclictest0-21swapper/023:27:170
16601992010,2cyclictest0-21swapper/021:34:520
1660199200,20cyclictest0-21swapper/022:51:510
2800621910,0sleep00-21swapper/023:55:380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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