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2025-12-10 - 05:31
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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
Characteristics of the 100 highest latencies:
System rackdslot1.osadl.org (updated Wed Dec 10, 2025 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2988221700,7sleep21774799cyclictest19:35:172
2988221700,7sleep21774799cyclictest19:35:172
2779321430,3sleep01774599cyclictest22:55:300
2847191680,3ptp4l0-21swapper/120:05:261
85892670,6sleep18592-21irqrtprio23:25:191
2847191660,3ptp4l0-21swapper/123:50:181
1774599660,28cyclictest8479-21runrttasks00:34:470
2847191650,4ptp4l0-21swapper/120:40:141
2847191650,26ptp4l18357-21iostat_ios19:10:181
1774599650,29cyclictest11268-21runrttasks21:12:520
1774599650,22cyclictest16199-21/usr/sbin/munin23:40:250
1774599641,28cyclictest10578-21seq00:37:120
1774599640,27cyclictest29014-21seq00:09:320
2847191620,4ptp4l0-21swapper/220:55:242
2847191620,3ptp4l16127-21ntp_states23:40:241
1774599621,32cyclictest1778-21gnome-shell19:12:580
1774599621,31cyclictest1778-21gnome-shell19:28:580
2847191610,4ptp4l0-21swapper/223:04:532
2847191610,4ptp4l0-21swapper/100:32:261
2847191610,4ptp4l0-21swapper/100:05:291
1774599611,32cyclictest1778-21gnome-shell23:53:590
1774599611,31cyclictest1778-21gnome-shell22:43:590
1774599611,26cyclictest1778-21gnome-shell23:35:590
1774599611,26cyclictest1778-21gnome-shell23:15:590
1774599611,25cyclictest1778-21gnome-shell19:32:580
1774599611,25cyclictest1778-21gnome-shell19:18:580
1774599610,28cyclictest26967-21seq20:37:540
1774599610,26cyclictest1088-21seq00:17:490
1774599610,25cyclictest7008-21seq22:13:060
2847191600,5ptp4l0-21swapper/219:07:392
2847191600,4ptp4l0-21swapper/220:17:502
2847191600,4ptp4l0-21swapper/200:18:232
2847191600,4ptp4l0-21swapper/121:45:161
2847191600,3ptp4l0-21swapper/123:09:101
2847191600,3ptp4l0-21swapper/100:10:261
1774599602,24cyclictest0-21swapper/019:35:140
1774599602,24cyclictest0-21swapper/019:35:140
1774599602,22cyclictest0-21swapper/021:00:190
1774599601,26cyclictest1778-21gnome-shell23:31:590
1774599601,26cyclictest1778-21gnome-shell22:37:590
1774599601,25cyclictest1778-21gnome-shell22:47:590
1774599601,24cyclictest4150-21seq20:55:550
1774599600,27cyclictest9421-21taskset22:19:230
1774599600,27cyclictest6075-21seq19:53:010
1774599600,25cyclictest16062-21runrttasks21:24:070
1774599600,24cyclictest12661-21missed_timers21:15:220
1774599600,24cyclictest12661-21missed_timers21:15:220
1774599600,20cyclictest6062-21fschecks_count23:20:170
1774599600,20cyclictest6062-21fschecks_count23:20:170
2847191590,3ptp4l0-21swapper/200:21:072
1774599591,31cyclictest2271-21seq22:01:420
1774599591,30cyclictest1778-21gnome-shell22:27:590
1774599591,28cyclictest17674-21taskset20:17:350
1774599591,27cyclictest1778-21gnome-shell23:05:590
1774599591,26cyclictest1778-21gnome-shell23:01:590
1774599591,25cyclictest207-21systemd-journal21:39:410
1774599591,24cyclictest15351-21seq20:13:120
1774599590,30cyclictest20494-21runrttasks21:31:460
1774599590,26cyclictest9100-21seq21:09:430
1774599590,26cyclictest22270-21taskset20:26:550
1774599590,25cyclictest31986-21seq20:49:570
1774599590,25cyclictest31986-21seq20:49:570
2847191580,4ptp4l0-21swapper/220:23:562
2847191580,4ptp4l0-21swapper/121:28:141
2847191580,3ptp4l0-21swapper/222:47:422
2847191580,3ptp4l0-21swapper/219:49:402
2847191580,3ptp4l0-21swapper/120:57:451
1774599581,30cyclictest32443-21seq21:58:370
1774599580,32cyclictest19187-21sshd23:47:380
1774599580,28cyclictest3721-21taskset19:47:260
1774599580,28cyclictest1935-21seq20:54:550
1774599580,26cyclictest4762-21seq22:08:520
2847191570,4ptp4l0-21swapper/321:35:523
2847191570,3ptp4l0-21swapper/123:15:151
2847191570,3ptp4l0-21swapper/120:50:211
2847191570,3ptp4l0-21swapper/119:30:231
2847191570,15ptp4l0-21swapper/122:10:141
2847191570,13ptp4l0-21swapper/123:55:181
1774599571,30cyclictest1778-21gnome-shell22:31:590
1774599571,26cyclictest8204-21taskset19:55:480
1774599570,29cyclictest25381-21seq21:44:410
1774599570,25cyclictest1241-21seq19:41:210
2847191560,4ptp4l0-21swapper/100:28:101
2847191560,3ptp4l0-21swapper/123:01:321
2847191560,3ptp4l0-21swapper/122:41:241
2847191560,3ptp4l0-21swapper/023:10:200
1774599560,32cyclictest18267-21seq21:27:400
1774599560,31cyclictest207-21systemd-journal00:11:400
1774599560,27cyclictest30191-21seq21:54:200
1774599560,26cyclictest29270-21taskset20:42:300
1774599560,22cyclictest26087-21cat22:54:590
2847191550,9ptp4l0-21swapper/119:45:181
2847191550,2ptp4l0-21swapper/120:45:261
2847191550,2ptp4l0-21swapper/120:45:261
1774599552,20cyclictest0-21swapper/020:32:400
1774599550,27cyclictest23973-21seq23:59:450
124242550,4sleep31774899cyclictest21:15:203
124242550,4sleep31774899cyclictest21:15:203
2847191540,4ptp4l0-21swapper/121:10:161
2847191540,11ptp4l15977-21iostat19:05:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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