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2026-05-15 - 12:57
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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 May 15, 2026 00:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223382308254,16sleep20-21swapper/219:08:162
223722275244,20sleep10-21swapper/119:08:431
223002265233,21sleep00-21swapper/019:07:460
223492262227,22sleep30-21swapper/319:08:253
50582890,0sleep00-21swapper/023:02:220
322152620,0sleep00-21swapper/022:59:420
31832620,0sleep10-21swapper/123:20:331
18092580,0sleep30-21swapper/320:45:143
251582560,0sleep30-21swapper/323:15:023
182322560,0sleep20-21swapper/223:50:132
139852560,0sleep1211rcuc/121:49:521
247302530,0sleep10-21swapper/123:34:381
209782190,0sleep20-21swapper/221:34:342
121282180,0sleep30-21swapper/321:29:073
52892170,0sleep00-21swapper/022:23:220
238292170,0sleep30-21swapper/322:54:363
254662160,0sleep122-21ksoftirqd/123:35:021
37932140,0sleep00-21swapper/022:02:400
179222130,0sleep00-21swapper/021:12:540
155292120,0sleep20-21swapper/222:10:112
233152110,0sleep00-21swapper/019:10:140
142092110,0sleep20-21swapper/221:10:202
9555290,0sleep00-21swapper/023:05:140
30268290,0sleep00-21swapper/021:40:010
225939998,1cyclictest34-21ksoftirqd/321:20:003
225939994,2cyclictest504-21dbus-daemon22:12:153
20677290,0sleep10-21swapper/100:10:421
14657290,0sleep10-21swapper/121:50:121
14657290,0sleep10-21swapper/121:50:121
225939987,1cyclictest34-21ksoftirqd/323:45:013
225899985,2cyclictest12062-21cron21:10:012
225899980,5cyclictest6848-21idleruntime-cro22:05:012
9001270,0sleep00-21swapper/000:24:060
8973270,0sleep10-21swapper/121:26:401
27458270,0sleep30-21swapper/300:35:153
225939976,1cyclictest34-21ksoftirqd/322:45:003
225939974,2cyclictest504-21dbus-daemon23:20:423
225939974,2cyclictest275-21systemd-journal19:47:023
225939974,2cyclictest14499-21grep21:10:213
225939973,3cyclictest30356-21gdbus21:40:013
225939973,3cyclictest275-21systemd-journal23:02:243
225939972,1cyclictest146582rm21:50:123
225939972,1cyclictest146582rm21:50:123
225939971,5cyclictest0-21swapper/300:00:093
225899976,1cyclictest31850-21ssh23:58:312
225899974,2cyclictest28-21ksoftirqd/200:40:002
225899973,3cyclictest658-21snmpd21:48:402
225859974,2cyclictest504-21dbus-daemon19:33:061
225859973,3cyclictest658-21snmpd21:17:361
225859973,3cyclictest275-21systemd-journal22:00:591
225859973,3cyclictest275-21systemd-journal20:50:001
225859972,4cyclictest0-21swapper/121:55:191
225859971,3cyclictest26585-21grep00:35:001
225859970,3cyclictest275-21systemd-journal23:42:471
225859970,1cyclictest31402-21users21:20:201
225819974,2cyclictest19690-21perf20:15:010
225819973,3cyclictest9665-21apt-get23:45:120
225819973,3cyclictest9665-21apt-get23:45:120
225819973,3cyclictest658-21snmpd00:11:500
225819973,3cyclictest275-21systemd-journal23:54:330
225819972,3cyclictest3175-21turbostat20:50:000
225819972,2cyclictest13018-21awk20:00:010
225819971,5cyclictest29716-11brltty19:26:500
225819971,5cyclictest0-21swapper/022:35:130
225819971,3cyclictest1010-21munin-run23:40:010
225819970,6cyclictest1744-21grep23:20:140
21719270,0chrt0-21swapper/200:31:132
11003270,0sleep00-21swapper/000:05:160
5578260,0sleep10-21swapper/100:01:531
30604260,0sleep20-21swapper/221:40:122
225939964,1cyclictest4975-21users20:50:203
225939963,2cyclictest795-21ssh22:00:213
225939963,2cyclictest658-21snmpd19:42:303
225939963,2cyclictest5520-21sh00:21:223
225939963,2cyclictest504-21dbus-daemon22:38:063
225939963,2cyclictest504-21dbus-daemon21:08:523
225939963,2cyclictest504-21dbus-daemon00:05:233
225939963,2cyclictest29434-21head20:35:153
225939963,2cyclictest19879-21ntpq00:30:173
225939963,2cyclictest19705-21sshd23:30:443
225939963,2cyclictest18683-21ntpq20:10:163
225939963,2cyclictest18254-21df_inode23:50:133
225939963,2cyclictest15586-21ssh23:09:093
225939963,1cyclictest0-21swapper/321:55:363
225939962,3cyclictest9808-11brltty22:55:363
225939962,3cyclictest8085-21cat21:00:133
225939962,3cyclictest658-21snmpd23:35:103
225939962,3cyclictest658-21snmpd22:46:003
225939962,3cyclictest658-21snmpd22:32:023
225939962,3cyclictest658-21snmpd22:25:323
225939962,3cyclictest658-21snmpd22:19:413
225939962,3cyclictest658-21snmpd22:08:533
225939962,3cyclictest658-21snmpd21:49:043
225939962,3cyclictest658-21snmpd21:35:153
225939962,3cyclictest658-21snmpd20:58:353
225939962,3cyclictest658-21snmpd20:21:433
225939962,3cyclictest658-21snmpd20:00:463
225939962,3cyclictest658-21snmpd19:37:483
225939962,3cyclictest658-21snmpd19:25:333
225939962,3cyclictest658-21snmpd19:23:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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