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2026-05-10 - 22:51
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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 rackaslot8.osadl.org (updated Sun May 10, 2026 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
175412312280,22sleep10-21swapper/107:08:191
175472278248,19sleep20-21swapper/207:08:242
175772264235,17sleep00-21swapper/007:08:470
174392264237,17sleep30-21swapper/307:07:003
149042880,0sleep20-21swapper/211:10:012
50992630,3sleep012-21ksoftirqd/011:04:030
42922630,0sleep10-21swapper/109:00:141
120732590,0sleep30-21swapper/308:05:143
100662590,0sleep30-21swapper/312:24:493
81522570,0sleep00-21swapper/009:47:580
264162570,0sleep30-21swapper/310:56:523
317592560,0sleep00-21swapper/010:40:200
241982560,1sleep20-21swapper/212:13:432
282602550,0sleep10-21swapper/111:17:421
100052200,0sleep00-21swapper/010:08:410
128882190,0sleep30-21swapper/310:49:173
268142160,0sleep00-21swapper/010:37:470
247292160,0sleep00-21swapper/009:38:360
320282150,0sleep30-21swapper/311:59:193
53622130,0sleep00-21swapper/012:02:050
67482120,0sleep00-21swapper/012:22:140
169932120,0sleep10-21swapper/110:12:381
177949996,2cyclictest3799-21ssh09:25:341
19571280,0sleep00-21swapper/011:12:230
178029984,3cyclictest275-21systemd-journal08:45:063
177979984,3cyclictest658-21snmpd08:01:262
177979984,3cyclictest275-21systemd-journal11:58:262
177979984,3cyclictest275-21systemd-journal10:04:262
177979984,2cyclictest275-21systemd-journal11:53:212
177899980,1cyclictest27499-21unixbench_singl09:20:210
3952270,0sleep30-21swapper/310:43:443
21763270,0sleep10-21swapper/111:52:481
178029974,2cyclictest29329-21sshd08:42:253
178029973,3cyclictest504-21dbus-daemon11:40:013
178029973,3cyclictest3611-21sed09:45:153
178029973,3cyclictest275-21systemd-journal12:15:573
178029973,3cyclictest275-21systemd-journal11:50:003
178029973,3cyclictest275-21systemd-journal10:18:343
178029973,2cyclictest275-21systemd-journal07:10:523
178029973,2cyclictest275-21systemd-journal07:10:513
177979974,2cyclictest6689-21cron07:55:012
177979973,3cyclictest560-21gdbus09:40:072
177979973,3cyclictest28495-21pluginstate10:20:012
177979973,3cyclictest275-21systemd-journal12:30:012
177979973,3cyclictest22435-21ssh09:36:512
177979972,4cyclictest28-21ksoftirqd/210:10:122
177979970,6cyclictest808-21ssh10:41:192
177949976,1cyclictest22-21ksoftirqd/109:55:001
177949976,1cyclictest22-21ksoftirqd/109:20:001
177949974,2cyclictest8649-21sh10:26:381
177949973,3cyclictest504-21dbus-daemon09:05:101
177949972,3cyclictest275-21systemd-journal12:10:031
177949970,7cyclictest0-21swapper/111:23:561
177949970,1cyclictest16621-21ssh10:31:221
177899976,1cyclictest0-21swapper/010:11:580
177899975,1cyclictest27367-21ssh12:15:140
177899973,3cyclictest658-21snmpd11:47:150
177899973,3cyclictest658-21snmpd07:30:020
177899973,3cyclictest504-21dbus-daemon10:02:440
177899973,3cyclictest275-21systemd-journal12:36:260
177899973,3cyclictest275-21systemd-journal10:59:420
177899973,3cyclictest275-21systemd-journal09:57:180
177899973,1cyclictest0-21swapper/012:06:390
177899970,3cyclictest24257-21/usr/sbin/munin11:35:150
26454260,1sleep20-21swapper/208:35:202
25603260,0sleep122-21ksoftirqd/111:35:181
178029966,0cyclictest0-21swapper/309:11:353
178029964,1cyclictest6874-21gltestperf09:05:153
178029963,2cyclictest9492-21ssh11:06:003
178029963,2cyclictest658-21snmpd12:36:083
178029963,2cyclictest658-21snmpd07:23:263
178029963,2cyclictest504-21dbus-daemon08:25:003
178029963,2cyclictest3301-21unixbench_multi08:55:223
178029963,2cyclictest27666-21ssh11:17:133
178029963,2cyclictest22448-21taskset09:56:113
178029963,2cyclictest15052-21cat10:50:133
178029963,2cyclictest14881-21ssh09:32:403
178029963,2cyclictest1-21systemd09:25:363
178029963,1cyclictest0-21swapper/310:32:273
178029963,1cyclictest0-21swapper/309:16:333
178029962,3cyclictest658-21snmpd12:30:103
178029962,3cyclictest658-21snmpd12:06:433
178029962,3cyclictest658-21snmpd11:26:203
178029962,3cyclictest658-21snmpd10:12:313
178029962,3cyclictest658-21snmpd10:05:463
178029962,3cyclictest658-21snmpd08:36:003
178029962,3cyclictest658-21snmpd07:35:443
178029962,3cyclictest658-21snmpd07:25:043
178029962,3cyclictest5456-21ls10:25:143
178029962,3cyclictest5053-21expr07:50:163
178029962,3cyclictest4859-21cat09:00:183
178029962,3cyclictest3742-21cat07:45:193
178029962,3cyclictest32330-21grep11:20:123
178029962,3cyclictest31645-21cat11:00:143
178029962,3cyclictest275-21systemd-journal09:44:493
178029962,3cyclictest275-21systemd-journal08:17:383
178029962,3cyclictest26557-21cat09:20:153
178029962,3cyclictest2003-21cat12:00:123
178029962,3cyclictest18098-21/usr/sbin/munin11:50:183
178029962,3cyclictest17248-21which11:30:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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