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2026-01-10 - 22:07
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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 Sat Jan 10, 2026 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177682301275,16sleep20-21swapper/207:08:372
177682301275,16sleep20-21swapper/207:08:362
178742278247,21sleep10-21swapper/107:09:531
178742278247,21sleep10-21swapper/107:09:521
178292274244,19sleep00-21swapper/007:09:230
178292274244,19sleep00-21swapper/007:09:220
175672262230,22sleep30-21swapper/307:06:013
175672262230,22sleep30-21swapper/307:06:003
215302650,0sleep20-21swapper/211:54:092
204522600,0sleep10-21swapper/109:55:441
326382590,0sleep30-21swapper/311:40:343
281632590,1sleep328153-21turbostat11:00:013
245422590,0sleep30-21swapper/311:16:263
42522580,0sleep30-21swapper/309:26:343
269582580,0sleep30-21swapper/310:20:003
303222550,0sleep10-21swapper/110:40:441
261352550,0sleep30-21swapper/307:25:143
165812550,0sleep00-21swapper/011:30:570
65272540,0sleep10-21swapper/110:46:011
170722540,0sleep20-21swapper/208:15:182
196292530,0sleep30-21swapper/309:55:193
220652450,0sleep00-21swapper/011:35:010
40142180,0sleep30-21swapper/309:45:503
313212180,0sleep30-21swapper/310:41:323
167222150,0sleep30-21swapper/311:11:463
293972140,0sleep20-21swapper/211:58:492
200062140,0sleep00-21swapper/011:14:200
186592140,0sleep20-21swapper/212:11:232
90232130,0sleep30-21swapper/311:26:433
121992130,0sleep30-21swapper/310:10:193
69982120,0sleep30-21swapper/310:46:243
180029990,8cyclictest20841-21ssh12:13:043
31399280,0sleep10-21swapper/108:50:001
30144280,0sleep10-21swapper/111:59:241
21388280,0sleep00-21swapper/011:54:030
19197280,0sleep10-21swapper/108:20:171
180029980,7cyclictest4440-21ssh12:03:133
179979984,3cyclictest658-21snmpd10:52:222
179979984,2cyclictest275-21systemd-journal09:50:002
179889983,3cyclictest275-21systemd-journal07:53:230
4573270,0sleep10-21swapper/110:05:451
23130270,0sleep10-21swapper/111:35:141
180029973,3cyclictest504-21dbus-daemon10:40:013
180029973,2cyclictest275-21systemd-journal12:08:323
180029973,1cyclictest0-21swapper/311:20:283
180029970,3cyclictest8565-21munin-run08:00:013
179979974,2cyclictest504-21dbus-daemon09:45:202
179979973,3cyclictest658-21snmpd07:16:382
179979973,3cyclictest275-21systemd-journal11:46:562
179939975,2cyclictest2250ksoftirqd/109:10:011
179939974,2cyclictest501-21in:imuxsock12:20:511
179939974,2cyclictest275-21systemd-journal09:50:261
179939974,2cyclictest22-21ksoftirqd/111:10:021
179939974,2cyclictest22-21ksoftirqd/111:10:011
179939973,3cyclictest21025-21ssh10:15:281
179939973,1cyclictest0-21swapper/109:33:581
179889973,3cyclictest658-21snmpd10:24:280
179889973,3cyclictest622-21sshd08:50:220
179889973,3cyclictest275-21systemd-journal08:04:480
179889973,3cyclictest27292-21cat10:00:190
179889973,1cyclictest0-21swapper/011:57:150
16372270,0sleep00-21swapper/012:30:030
180029963,2cyclictest658-21snmpd11:00:073
180029963,2cyclictest658-21snmpd09:32:123
180029963,2cyclictest658-21snmpd08:50:153
180029963,2cyclictest31673-21tr12:20:003
180029963,2cyclictest30582-21ssh11:59:463
180029963,2cyclictest28610-21cat07:30:163
180029963,2cyclictest28381-21ssh10:00:273
180029963,2cyclictest275-21systemd-journal10:51:213
180029963,2cyclictest275-21systemd-journal10:05:193
180029963,2cyclictest24899-21apt09:20:083
180029963,2cyclictest18185-21cat09:35:133
180029963,2cyclictest13770-21ssh09:51:583
180029962,3cyclictest658-21snmpd11:50:273
180029962,3cyclictest658-21snmpd11:34:283
180029962,3cyclictest658-21snmpd10:32:033
180029962,3cyclictest658-21snmpd09:17:453
180029962,3cyclictest658-21snmpd08:12:383
180029962,3cyclictest658-21snmpd08:01:373
180029962,3cyclictest658-21snmpd07:46:513
180029962,3cyclictest658-21snmpd07:43:303
180029962,3cyclictest658-21snmpd07:22:263
180029962,3cyclictest6203-21grep09:05:143
180029962,3cyclictest27682-21cat08:40:173
180029962,3cyclictest275-21systemd-journal11:35:533
180029962,3cyclictest275-21systemd-journal07:54:473
180029962,3cyclictest21744-21cat07:15:163
180029962,3cyclictest13006-21cron08:10:013
180029962,3cyclictest1-21systemd12:31:533
180029962,1cyclictest0-21swapper/312:25:433
180029962,1cyclictest0-21swapper/310:20:553
180029961,2cyclictest25392-21fschecks_count12:35:143
180029960,6cyclictest0-21swapper/312:20:243
180029960,6cyclictest0-21swapper/309:41:383
180029960,6cyclictest0-21swapper/308:25:223
180029960,5cyclictest18475-21cstates07:10:133
180029960,2cyclictest4508-21ntp_states09:00:173
180029960,2cyclictest4493-21/usr/sbin/munin11:05:193
180029960,2cyclictest4493-21/usr/sbin/munin11:05:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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