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2025-12-14 - 00:02
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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 Dec 13, 2025 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
221872315285,20sleep10-21swapper/107:05:051
239912287259,17sleep20-21swapper/207:08:012
239162270238,21sleep00-21swapper/007:07:010
238412259228,21sleep30-21swapper/307:06:053
229172550,0sleep00-21swapper/009:25:200
242679983,3cyclictest275-21systemd-journal12:33:371
242679982,3cyclictest14794-21basename09:09:591
242649980,3cyclictest4621-21awk10:00:020
19696280,0sleep20-21swapper/209:20:132
242759974,2cyclictest275-21systemd-journal09:14:143
242759973,3cyclictest275-21systemd-journal07:34:563
242709976,1cyclictest32594-21munin-run09:50:012
242709976,1cyclictest28-21ksoftirqd/209:10:002
242709974,2cyclictest275-21systemd-journal07:35:012
242709973,3cyclictest5892-21cron11:19:552
242709973,3cyclictest275-21systemd-journal10:32:282
242679973,2cyclictest275-21systemd-journal09:22:441
242679971,3cyclictest31534-21munin-run07:25:011
242649973,3cyclictest504-21dbus-daemon08:15:010
242649973,3cyclictest275-21systemd-journal12:00:010
242649972,3cyclictest275-21systemd-journal09:40:230
242649970,4cyclictest31546-21turbostat07:25:010
14341270,1sleep10-21swapper/111:30:221
6702260,0sleep20-21swapper/207:40:162
242759964,1cyclictest14473-21df_inode10:20:153
242759963,2cyclictest8738-21cut08:55:163
242759963,2cyclictest7803-21taskset07:41:233
242759963,2cyclictest658-21snmpd11:55:013
242759963,2cyclictest658-21snmpd08:40:123
242759963,2cyclictest28973-21seq07:16:223
242759963,2cyclictest24310-21cat10:40:233
242759962,3cyclictest9835-21ls10:10:143
242759962,3cyclictest658-21snmpd12:01:313
242759962,3cyclictest658-21snmpd10:57:203
242759962,3cyclictest658-21snmpd10:05:433
242759962,3cyclictest658-21snmpd08:54:193
242759962,3cyclictest658-21snmpd08:45:193
242759962,3cyclictest658-21snmpd08:26:503
242759962,3cyclictest658-21snmpd08:23:023
242759962,3cyclictest658-21snmpd08:05:173
242759962,3cyclictest658-21snmpd08:01:533
242759962,3cyclictest560-21gdbus12:15:013
242759962,3cyclictest504-21dbus-daemon09:40:013
242759962,3cyclictest29687-21cat08:30:163
242759962,3cyclictest275-21systemd-journal12:36:063
242759962,3cyclictest27429-21apt-get10:50:143
242759962,3cyclictest2026-21cat11:05:133
242759962,3cyclictest17968-21cat11:40:153
242759962,3cyclictest0-21swapper/310:15:333
242759962,3cyclictest0-21swapper/308:19:283
242759960,6cyclictest0-21swapper/309:25:263
242759960,5cyclictest20719-21/usr/sbin/munin10:35:223
242759960,2cyclictest4043-21expr07:35:153
242759960,2cyclictest32171-21df_inode07:25:143
242759960,2cyclictest32067-21cpuspeed_turbos11:00:123
242759960,2cyclictest28937-21perl09:40:313
242759960,2cyclictest16505-21sed11:35:213
242759960,2cyclictest1144-21diskstats12:15:143
242709966,0cyclictest0-21swapper/210:40:402
242709966,0cyclictest0-21swapper/210:25:022
242709965,1cyclictest28-21ksoftirqd/212:15:002
242709965,1cyclictest28-21ksoftirqd/210:55:002
242709964,1cyclictest1352-21hddtemp_smartct12:15:142
242709963,2cyclictest8657-21users10:05:232
242709963,2cyclictest658-21snmpd10:55:312
242709963,2cyclictest658-21snmpd09:41:502
242709963,2cyclictest24175-21sshd08:18:592
242709963,2cyclictest23488-21taskset09:27:522
242709963,2cyclictest15263-21readlink10:20:202
242709963,2cyclictest13309-21unixbench_multi10:15:222
242709962,3cyclictest658-21snmpd11:55:102
242709962,3cyclictest658-21snmpd11:50:032
242709962,3cyclictest658-21snmpd08:55:402
242709962,3cyclictest658-21snmpd08:12:382
242709962,3cyclictest658-21snmpd07:54:112
242709962,3cyclictest658-21snmpd07:20:082
242709962,3cyclictest658-21snmpd07:12:392
242709962,3cyclictest504-21dbus-daemon09:05:002
242709962,3cyclictest4491-21grep11:10:142
242709962,3cyclictest28647-21sshd08:29:012
242709962,3cyclictest275-21systemd-journal10:37:292
242709962,3cyclictest275-21systemd-journal10:10:322
242709962,3cyclictest275-21systemd-journal08:08:512
242709962,3cyclictest2045-21expr11:05:132
242709962,3cyclictest19769-21expr11:45:132
242709962,3cyclictest13398-21find07:55:102
242709960,2cyclictest17285-21/usr/sbin/munin11:40:172
242709960,0cyclictest0-21swapper/212:30:132
242709960,0cyclictest0-21swapper/211:35:022
242679964,1cyclictest6451-21users10:00:291
242679963,2cyclictest658-21snmpd11:11:381
242679963,2cyclictest504-21dbus-daemon08:27:171
242679963,2cyclictest501-21in:imuxsock11:45:091
242679963,2cyclictest501-21in:imuxsock09:57:271
242679963,2cyclictest32593-21dump-pmu-power09:50:011
242679963,2cyclictest30422-21cat10:55:151
242679963,2cyclictest275-21systemd-journal08:36:281
242679963,2cyclictest25460-21netstat08:20:161
242679963,2cyclictest23515-21smart_sda08:15:211
242679963,2cyclictest17790-21grep09:15:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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