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2025-07-12 - 12:48
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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 Sat Jul 12, 2025 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1626821720,5sleep01661999cyclictest23:45:180
137221680,7sleep11662099cyclictest22:05:131
1662199720,4cyclictest4240-21sed23:20:152
2847191670,5ptp4l31479-21iostat_ios20:50:201
16620996619,9cyclictest25-21ksoftirqd/120:45:001
2847191640,4ptp4l0-21swapper/122:55:291
16620996425,9cyclictest25-21ksoftirqd/120:40:001
2847191630,4ptp4l0-21swapper/020:00:010
16621996310,50cyclictest31273-21sed22:00:002
1662199630,3cyclictest30344-21latency_hist19:39:592
1662299628,16cyclictest0-21swapper/322:45:223
2847191610,7ptp4l0-21swapper/219:41:052
2847191610,12ptp4l1293-21snmpd19:08:260
2847191590,4ptp4l0-21swapper/321:05:193
2847191590,4ptp4l0-21swapper/120:49:111
2847191590,4ptp4l0-21swapper/119:42:551
2847191590,4ptp4l0-21swapper/100:16:181
2847191590,3ptp4l0-21swapper/223:37:202
16620995920,8cyclictest25-21ksoftirqd/100:35:001
2847191580,4ptp4l0-21swapper/222:48:482
2847191580,4ptp4l0-21swapper/121:34:521
2847191580,4ptp4l0-21swapper/121:34:521
2847191580,4ptp4l0-21swapper/120:31:361
2847191580,4ptp4l0-21swapper/020:46:270
16622995811,12cyclictest2847191ptp4l23:10:193
2847191570,3ptp4l0-21swapper/222:14:402
16622995714,15cyclictest23857-21sendmail-mta21:43:043
2847191560,4ptp4l16953-21df_abs19:10:140
2847191560,4ptp4l0-21swapper/121:20:461
2847191560,4ptp4l0-21swapper/120:05:041
2847191560,4ptp4l0-21swapper/021:46:020
2847191560,3ptp4l0-21swapper/322:36:313
2847191560,3ptp4l0-21swapper/220:20:252
2847191550,4ptp4l0-21swapper/119:36:001
2847191550,4ptp4l0-21swapper/023:37:040
2847191550,3ptp4l0-21swapper/222:16:272
2847191550,3ptp4l0-21swapper/123:58:491
16622995511,10cyclictest23950-21cat00:00:273
2847191540,6ptp4l0-21swapper/119:09:071
2847191540,4ptp4l0-21swapper/100:20:561
2847191540,3ptp4l29792-21cpuspeed_turbos00:15:152
2847191530,4ptp4l0-21swapper/100:36:321
2847191530,14ptp4l15643-21awk19:05:252
2847191520,4ptp4l0-21swapper/022:30:500
19242520,3sleep30-21swapper/300:25:003
1662299528,13cyclictest3679-21/usr/sbin/munin22:10:283
1662299527,6cyclictest8624-21ntp_states20:00:243
16619995220,4cyclictest9-21ksoftirqd/019:20:210
2847191510,4ptp4l0-21swapper/021:58:340
1662299518,14cyclictest1316-21apt-get22:05:133
2847191500,4ptp4l0-21swapper/122:19:231
2847191500,4ptp4l0-21swapper/021:01:220
2847191500,3ptp4l0-21swapper/020:04:470
2847191490,4ptp4l0-21swapper/223:43:212
2847191490,4ptp4l0-21swapper/123:33:241
2847191490,4ptp4l0-21swapper/100:04:001
1662299499,12cyclictest9173-21cut22:20:203
16620994917,3cyclictest25-21ksoftirqd/121:00:011
16619994920,4cyclictest9-21ksoftirqd/022:15:220
2847191480,4ptp4l0-21swapper/000:31:440
2847191480,13ptp4l0-21swapper/100:08:081
1662299489,15cyclictest8090-21run-parts00:35:263
16622994812,7cyclictest1778-21gnome-shell23:03:583
16622994810,14cyclictest25383-21ntp_states21:45:233
1662199483,33cyclictest0-21swapper/222:55:252
16619994821,3cyclictest9-21ksoftirqd/022:40:170
2847191470,5ptp4l0-21swapper/319:05:323
16622994711,7cyclictest2847191ptp4l20:20:273
1662199472,34cyclictest0-21swapper/222:45:002
1662199470,3cyclictest32688-21irqrtprio00:20:182
16619994717,4cyclictest9-21ksoftirqd/022:45:220
16619994715,4cyclictest9-21ksoftirqd/023:15:240
2847191460,5ptp4l0-21swapper/119:52:371
2847191460,5ptp4l0-21swapper/019:48:310
2847191460,4ptp4l0-21swapper/121:17:541
2847191460,4ptp4l0-21swapper/021:24:100
1662299469,15cyclictest30589-21/usr/sbin/munin19:40:283
16619994632,4cyclictest9-21ksoftirqd/020:45:000
16619994617,4cyclictest9-21ksoftirqd/019:50:160
16619994613,8cyclictest9-21ksoftirqd/023:05:140
2847191450,5ptp4l24855-21apt-get00:05:113
2847191450,5ptp4l0-21swapper/022:50:150
2847191450,4ptp4l5711-21apt-get21:05:131
2847191450,4ptp4l22460-21apt-get22:50:141
2847191450,4ptp4l0-21swapper/223:47:132
2847191450,4ptp4l0-21swapper/022:23:330
1662099459,8cyclictest25-21ksoftirqd/121:40:191
16620994519,4cyclictest25-21ksoftirqd/119:25:241
16619994515,3cyclictest9-21ksoftirqd/019:30:150
2847191440,5ptp4l0-21swapper/323:55:133
2847191440,5ptp4l0-21swapper/021:10:120
2847191440,5ptp4l0-21swapper/019:25:200
2847191440,4ptp4l29098-21apt-get21:55:161
2847191440,4ptp4l0-21swapper/320:35:283
2847191440,4ptp4l0-21swapper/121:52:141
2847191440,3ptp4l0-21swapper/223:16:342
2847191440,3ptp4l0-21swapper/120:17:151
2847191440,11ptp4l0-21swapper/220:47:182
2847191440,10ptp4l0-21swapper/119:47:431
1662299445,6cyclictest2847191ptp4l22:25:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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