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2026-05-24 - 11:40
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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 highest latencies:
System rack6slot5.osadl.org (updated Sun May 24, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
264439971293534,3581cyclictest8208-21kworker/0:119:14:510
264439971143844,3247cyclictest8208-21kworker/0:119:18:180
258582836184,203sleep00-21swapper19:05:470
264439950035,404cyclictest23022-21awk20:25:300
264439949531,449cyclictest22214-21munin-node23:00:350
264439948934,441cyclictest15163-21ssh23:56:590
264439948733,440cyclictest32225-21ssh22:07:260
264439948612,459cyclictest6729-21diskmemload00:32:400
264439948532,439cyclictest8734-21ssh21:14:100
264439948532,438cyclictest6729-21diskmemload22:22:200
264439948331,438cyclictest12963-21ssh23:51:490
264439947834,373cyclictest27184-21rm23:10:450
264439947734,430cyclictest9216-21ssh23:44:510
264439946934,435cyclictest0-21swapper19:35:000
264439946731,436cyclictest0-21swapper23:49:040
264439946535,415cyclictest5627-21kworker/u2:300:07:100
264439945936,362cyclictest18699-21kworker/u2:121:39:340
264439945273,95cyclictest21311-21missed_timers00:11:220
264439942733,371cyclictest18352-21ssh22:50:390
264439942723,344cyclictest969-21seq20:54:250
264439942234,372cyclictest20546-21turbostat.cron20:20:010
264439941950,345cyclictest6729-19diskmemload23:36:250
264439941945,360cyclictest11-21ksoftirqd/021:20:410
264439941934,371cyclictest4894-21runrttasks20:01:350
264439941835,368cyclictest21797-21kworker/u2:021:58:290
264439941735,367cyclictest4901-21ssh23:35:020
264439941536,363cyclictest27495-21awk00:25:530
264439941435,317cyclictest31738-21memory00:35:510
264439941435,195cyclictest15553-21sendmail_mailst21:30:150
264439941337,314cyclictest6729-21diskmemload22:31:050
264439941237,360cyclictest29239-21chrt22:00:510
264439940936,188cyclictest1207-21runrttasks22:10:540
264439940743,350cyclictest13-21rcuc/022:36:110
264439940740,89cyclictest13-21rcuc/020:45:540
264439940731,361cyclictest30156-21apt-get23:17:220
264439940627,309cyclictest1148-21runrttasks20:55:050
264439940532,313cyclictest6486-21kworker/u2:222:47:000
264439940531,374cyclictest0-21swapper19:57:260
264439940442,349cyclictest0-21swapper21:49:460
264439940431,359cyclictest14926-21ssh21:27:420
264439940335,354cyclictest6729-21diskmemload21:50:240
264439940331,359cyclictest4272-21snmpd23:08:230
264439940232,310cyclictest16937-21munin-node00:01:190
264439940134,352cyclictest20806-21timerandwakeup21:41:100
264439940033,306cyclictest31911-21grep23:21:190
264439939724,359cyclictest2362-21ssh23:28:490
264439939635,301cyclictest22074-21kworker/u2:100:17:500
264439939532,186cyclictest4589-21runrttasks21:02:360
264439939354,278cyclictest30888-21ntpq19:20:170
264439939334,177cyclictest1039-21chrt19:25:470
264439939150,161cyclictest6729-21diskmemload00:21:190
264439939135,294cyclictest6729-21diskmemload22:55:440
264439939033,295cyclictest28086-21mailstats20:40:110
264439938835,293cyclictest6083-21df21:06:030
264439938834,354cyclictest0-21swapper22:44:050
264439938734,340cyclictest10344-21strings19:50:440
264439938633,339cyclictest4286-21ssh22:17:550
264439938631,355cyclictest0-21swapper19:46:140
264439938533,339cyclictest12-21rcu_preempt19:45:020
264439938532,340cyclictest8741-21ssh22:28:230
264439938531,292cyclictest24553-21awk20:30:210
264439938232,289cyclictest4272-21snmpd20:35:230
264439938136,173cyclictest9066-21munin-node21:15:150
264439938132,288cyclictest15119-21munin-node20:05:350
264439937733,284cyclictest21689-21missed_timers20:20:570
264439937013,296cyclictest3964-21munin-node19:35:470
264439936896,258cyclictest13-21rcuc/020:10:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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