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2025-12-08 - 10:27
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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 Mon Dec 08, 2025 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1989121660,5sleep0955499cyclictest19:30:270
89162750,4sleep08914-21perf23:45:000
2847191690,4ptp4l0-21swapper/321:06:103
2847191670,5ptp4l0-21swapper/322:00:133
2847191670,25ptp4l0-21swapper/322:25:003
2847191650,5ptp4l0-21swapper/300:15:253
10992620,4sleep10-21swapper/123:25:271
134022610,2sleep013406-21irqrtprio21:35:180
134022610,2sleep013406-21irqrtprio21:35:180
955599601,5cyclictest2849491getstats20:55:161
955599601,5cyclictest2849491getstats20:55:161
228872600,3sleep022891-21timerandwakeup19:35:280
955499592,23cyclictest0-21swapper/021:55:290
2847191590,4ptp4l0-21swapper/022:47:200
2847191590,3ptp4l0-21swapper/319:59:583
132472590,3sleep313249-21timerwakeupswit23:50:293
2847191580,4ptp4l0-21swapper/200:00:272
2847191570,3ptp4l0-21swapper/219:35:392
2847191560,4ptp4l0-21swapper/300:22:153
2847191560,4ptp4l0-21swapper/021:34:270
2847191560,3ptp4l0-21swapper/223:30:112
2847191560,3ptp4l0-21swapper/200:09:242
955499551,24cyclictest28369-21taskset20:58:390
955499551,24cyclictest28369-21taskset20:58:390
955499550,24cyclictest27124-21taskset23:12:410
2847191550,4ptp4l0-21swapper/323:55:263
2847191550,3ptp4l0-21swapper/320:52:483
2847191550,3ptp4l0-21swapper/320:43:573
955499542,22cyclictest0-21swapper/020:19:100
955499541,30cyclictest3024-21taskset21:14:110
955499540,23cyclictest21668-21taskset21:54:540
2847191540,4ptp4l0-21swapper/322:35:103
2847191540,3ptp4l0-21swapper/322:55:293
2847191540,3ptp4l0-21swapper/321:35:073
2847191540,3ptp4l0-21swapper/321:35:073
955499531,48cyclictest29931-21phc2sys21:00:250
955499530,19cyclictest2847191ptp4l19:20:270
2847191530,4ptp4l0-21swapper/320:38:453
955499521,25cyclictest20318-21taskset22:59:300
955499520,22cyclictest32239-21runrttasks00:31:220
2847191520,4ptp4l0-21swapper/322:13:093
2847191520,4ptp4l0-21swapper/121:33:571
955499510,23cyclictest952-21taskset22:18:410
2847191510,5ptp4l0-21swapper/019:07:390
2847191510,4ptp4l0-21swapper/320:45:303
955499500,22cyclictest2847191ptp4l19:45:210
2847191500,4ptp4l0-21swapper/320:56:153
2847191500,4ptp4l0-21swapper/320:56:153
2847191490,4ptp4l0-21swapper/322:09:193
2847191490,4ptp4l0-21swapper/322:09:193
2847191490,4ptp4l0-21swapper/321:47:503
2847191480,5ptp4l8064-21/usr/sbin/munin19:05:191
2847191480,4ptp4l0-21swapper/322:17:003
2847191480,4ptp4l0-21swapper/222:37:522
2847191480,13ptp4l0-21swapper/100:15:271
2847191480,11ptp4l0-21swapper/120:10:201
2847191470,7ptp4l0-21swapper/223:16:152
2847191470,13ptp4l0-21swapper/000:10:220
2847191470,10ptp4l0-21swapper/119:40:281
2847191470,10ptp4l0-21swapper/119:40:281
2847191460,5ptp4l0-21swapper/321:33:213
2847191460,3ptp4l0-21swapper/322:40:173
2847191460,11ptp4l0-21swapper/022:23:410
2847191460,10ptp4l0-21swapper/119:45:421
2847191450,9ptp4l0-21swapper/020:13:520
2847191450,5ptp4l9343-21python21:25:260
2847191450,4ptp4l0-21swapper/323:21:403
2847191450,11ptp4l0-21swapper/200:39:322
2847191450,10ptp4l0-21swapper/222:18:112
2847191450,10ptp4l0-21swapper/200:16:192
2847191450,10ptp4l0-21swapper/122:40:261
2847191440,7ptp4l0-21swapper/222:25:152
2847191440,5ptp4l24853-21meminfo20:50:220
2847191440,5ptp4l0-21swapper/223:45:132
2847191440,5ptp4l0-21swapper/220:10:172
2847191440,5ptp4l0-21swapper/019:55:280
2847191440,10ptp4l0-21swapper/222:34:432
955499430,31cyclictest26306-21taskset22:04:460
2847191430,9ptp4l0-21swapper/222:06:222
2847191430,9ptp4l0-21swapper/222:06:222
2847191430,9ptp4l0-21swapper/119:53:041
2847191430,8ptp4l30919-21sed19:55:162
2847191430,6ptp4l18990-21df_inode00:05:150
2847191430,4ptp4l9678-21diskstats23:45:160
2847191430,4ptp4l7789-21meminfo23:40:221
2847191430,4ptp4l7622-21apt-get20:15:162
2847191430,4ptp4l326-21apt-get00:35:133
2847191430,4ptp4l30867-21meminfo23:20:212
2847191430,4ptp4l22959-21apt-get23:05:183
2847191430,4ptp4l20636-21apt-get23:00:141
2847191430,4ptp4l18680-21apt-get00:05:131
2847191430,4ptp4l0-21swapper/319:46:443
2847191430,4ptp4l0-21swapper/219:29:252
2847191430,3ptp4l4498-21apt-get23:35:130
2847191430,3ptp4l0-21swapper/100:28:071
2847191420,5ptp4l29106-21apt-get22:10:122
2847191420,5ptp4l1293-21snmpd19:34:343
2847191420,5ptp4l0-21swapper/300:00:173
2847191420,5ptp4l0-21swapper/222:50:022
2847191420,4ptp4l955599cyclictest22:20:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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