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2026-08-14 - 11:25
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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 Fri Aug 14, 2026 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
286162325296,19sleep20-21swapper/219:05:422
289632289262,18sleep10-21swapper/119:09:551
288632264233,21sleep00-21swapper/019:08:380
287732262234,18sleep30-21swapper/319:07:283
14712670,0sleep20-21swapper/222:35:492
11212650,0sleep10-21swapper/121:18:431
92022620,0sleep30-21swapper/323:39:403
295872590,0sleep30-21swapper/300:30:163
280552590,0sleep2271rcuc/222:32:442
169862590,0sleep20-21swapper/221:05:142
110352590,0sleep20-21swapper/222:03:052
52362570,0sleep30-21swapper/322:38:423
299742560,0sleep30-21swapper/322:14:523
150992560,0sleep10-21swapper/121:45:591
124692560,0sleep20-21swapper/223:40:472
44872540,0sleep00-21swapper/023:16:550
101182540,0sleep00-21swapper/021:43:320
97102530,0sleep00-21swapper/000:37:510
172802470,0sleep10-21swapper/123:05:141
292812380,0sleep20-21swapper/221:35:172
271382210,0sleep00-21swapper/022:12:400
170432180,0sleep00-21swapper/023:05:140
46972150,0sleep20-21swapper/223:17:052
65832130,0sleep30-21swapper/321:40:513
65002130,0sleep10-21swapper/122:39:401
282382130,0sleep00-21swapper/023:30:480
211732130,0sleep20-21swapper/221:10:392
204442120,0sleep30-21swapper/322:28:173
290959990,8cyclictest32692-21cstates22:55:122
290929996,2cyclictest21016-21sh21:10:311
290989983,3cyclictest275-21systemd-journal19:15:013
290959980,2cyclictest5334-21ssh23:36:422
290929981,4cyclictest6107-21sh22:20:011
290879984,3cyclictest275-21systemd-journal00:00:000
290879983,3cyclictest6968-21turbostat22:40:010
290879980,5cyclictest3655-21ssh21:40:000
11834280,0sleep30-21swapper/300:20:083
290989975,2cyclictest34-21ksoftirqd/300:00:003
290989975,1cyclictest18318-21ssh21:48:233
290989974,2cyclictest7436-21cron20:45:003
290989974,2cyclictest504-21dbus-daemon23:45:003
290989974,2cyclictest504-21dbus-daemon19:21:333
290989974,2cyclictest30712-21sshd20:22:103
290989973,3cyclictest658-21snmpd23:23:553
290989973,3cyclictest658-21snmpd23:08:573
290989973,3cyclictest275-21systemd-journal20:35:013
290989973,0cyclictest34-21ksoftirqd/322:30:183
290989970,3cyclictest3831-21cat00:15:133
290989970,1cyclictest31276-21ssh23:52:313
290959974,2cyclictest275-21systemd-journal22:45:012
290959973,3cyclictest504-21dbus-daemon00:20:002
290959973,3cyclictest27402-21cat00:10:002
290959973,3cyclictest1895-21expr20:30:162
290959973,3cyclictest12796-21awk21:25:202
290959972,3cyclictest30727-21snmpd00:03:402
290959970,6cyclictest18770-21pmu-power23:25:172
290959970,3cyclictest2926750/usr/sbin/munin19:10:172
290959970,1cyclictest11355-21ssh23:20:502
290929973,3cyclictest658-21snmpd19:43:591
290929973,3cyclictest275-21systemd-journal20:56:581
290929973,3cyclictest13488-21diskstats19:45:141
290929973,2cyclictest275-21systemd-journal23:28:051
290929970,4cyclictest9675-21ls20:50:011
290879973,3cyclictest504-21dbus-daemon23:23:540
290879973,3cyclictest275-21systemd-journal22:40:260
290879973,3cyclictest275-21systemd-journal20:43:040
290879973,3cyclictest275-21systemd-journal00:20:120
290879970,1cyclictest25595-21ssh21:52:220
26168270,0sleep00-21swapper/000:09:120
329260,0sleep10-21swapper/100:12:541
31480260,0sleep30-21swapper/321:36:313
290989965,1cyclictest18565-21diskmemload22:40:283
290989963,2cyclictest5601-21ssh21:20:443
290989963,2cyclictest504-21dbus-daemon23:15:193
290989963,2cyclictest504-21dbus-daemon20:03:233
290989963,2cyclictest504-21dbus-daemon19:41:383
290989963,2cyclictest34-21ksoftirqd/322:55:143
290989963,2cyclictest31056-21sshd21:16:493
290989963,2cyclictest22630-21sh00:25:503
290989963,2cyclictest21725-21sh21:11:053
290989963,2cyclictest18270-21ssh22:45:543
290989962,3cyclictest8718-21cut23:00:133
290989962,3cyclictest8718-21cut23:00:133
290989962,3cyclictest8426-21cut20:45:173
290989962,3cyclictest658-21snmpd23:33:153
290989962,3cyclictest658-21snmpd23:10:543
290989962,3cyclictest658-21snmpd22:53:153
290989962,3cyclictest658-21snmpd21:30:173
290989962,3cyclictest658-21snmpd20:11:543
290989962,3cyclictest658-21snmpd19:58:063
290989962,3cyclictest658-21snmpd19:51:183
290989962,3cyclictest30727-21snmpd00:35:113
290989962,3cyclictest17997-21cat23:25:123
290989962,3cyclictest14319-21expr22:05:143
290989962,3cyclictest0-21swapper/323:45:513
290989962,1cyclictest0-21swapper/322:21:043
290989962,1cyclictest0-21swapper/322:02:113
290989961,4cyclictest16349-21turbostat21:05:013
290989961,4cyclictest0-21swapper/321:57:193
290989961,3cyclictest275-21systemd-journal20:37:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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