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2026-04-23 - 12:39
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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 Thu Apr 23, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
993921720,6sleep11367499cyclictest23:40:171
274421310,7sleep31367799cyclictest21:05:133
21942740,4sleep12197-21latency_hist22:15:001
134491680,24ptp4l26469-21ls20:45:203
1367499673,62cyclictest12384-21kworker/1:120:36:281
134491670,4ptp4l0-21swapper/021:35:200
1367499651,61cyclictest30836-21diskstats00:25:151
13674996510,19cyclictest28763-21tail19:40:241
75172640,5sleep09-21ksoftirqd/023:35:140
1367499641,60cyclictest3029-21iostat_ios22:15:181
1367499641,59cyclictest17515-21ntp_states21:35:221
1367499640,24cyclictest32347-21chrt23:19:191
134491620,4ptp4l25345-21mandb00:11:091
134491620,4ptp4l0-21swapper/200:08:082
1367499611,21cyclictest18079-21latency_hist20:30:011
1367499610,58cyclictest6043-21ntp_states23:30:241
1367499600,22cyclictest29487-21ls22:00:281
134491600,8ptp4l13007-21taskset19:07:063
1367499592,18cyclictest0-21swapper/123:10:001
134491580,4ptp4l0-21swapper/321:30:213
134491580,3ptp4l0-21swapper/219:27:342
134491580,3ptp4l0-21swapper/021:15:230
134491580,10ptp4l0-21swapper/019:10:200
1367499564,18cyclictest134491ptp4l23:55:241
1367499560,28cyclictest31862-21seq19:49:091
1367499560,25cyclictest1507-21seq19:50:581
134491560,4ptp4l0-21swapper/223:48:432
134491560,11ptp4l0-21swapper/321:27:223
1367499550,51cyclictest19559-21/usr/sbin/munin21:40:191
1367499550,16cyclictest134491ptp4l00:05:231
134491550,3ptp4l0-21swapper/219:17:302
134491550,18ptp4l0-21swapper/321:50:293
1367499542,22cyclictest0-21swapper/100:15:041
1367499540,51cyclictest1301-21snmpd21:09:191
1367499540,25cyclictest16199-21chrt23:54:291
1367499540,14cyclictest134491ptp4l23:25:001
134491540,4ptp4l0-21swapper/021:57:040
134491540,3ptp4l0-21swapper/322:55:303
134491540,3ptp4l0-21swapper/221:25:152
1367499530,30cyclictest27022-21seq19:36:131
134491530,4ptp4l0-21swapper/322:40:213
134491530,4ptp4l0-21swapper/000:20:340
1367599522,4cyclictest33-21ksoftirqd/219:25:002
1367599522,4cyclictest33-21ksoftirqd/219:25:002
13673995236,5cyclictest9-21ksoftirqd/019:35:000
134491520,4ptp4l0-21swapper/223:51:252
134491520,4ptp4l0-21swapper/223:06:212
134491520,4ptp4l0-21swapper/023:25:560
134491520,3ptp4l0-21swapper/021:46:480
64062510,3sleep00-21swapper/021:10:280
13675995137,12cyclictest33-21ksoftirqd/221:00:002
13675995122,4cyclictest33-21ksoftirqd/220:41:412
134491510,4ptp4l0-21swapper/320:04:133
13677995014,6cyclictest41-21ksoftirqd/300:00:163
134491500,4ptp4l0-21swapper/222:15:412
134491500,4ptp4l0-21swapper/019:38:220
134491500,3ptp4l0-21swapper/320:31:593
134491500,3ptp4l0-21swapper/221:53:172
134491500,30ptp4l0-21swapper/220:49:242
134491500,10ptp4l11464-21fschecks_count19:05:141
1367499490,46cyclictest28625-21iostat_ios23:10:171
1367499490,28cyclictest15937-21taskset22:43:021
1367399494,7cyclictest134491ptp4l23:00:190
134491490,5ptp4l0-21swapper/221:55:412
134491490,4ptp4l1367599cyclictest21:12:372
134491490,4ptp4l0-21swapper/222:28:242
134491490,4ptp4l0-21swapper/219:37:062
134491490,4ptp4l0-21swapper/022:32:170
134491490,3ptp4l0-21swapper/322:49:163
99922480,3sleep10-21swapper/120:10:191
13677994834,4cyclictest41-21ksoftirqd/323:23:453
13677994834,4cyclictest41-21ksoftirqd/323:16:583
1367599485,5cyclictest33-21ksoftirqd/220:35:422
1367599485,3cyclictest33-21ksoftirqd/200:15:252
1367599483,5cyclictest33-21ksoftirqd/200:03:232
1367599480,2cyclictest121rcu_preempt00:26:142
1367499480,25cyclictest13733-21chrt21:28:381
134491480,4ptp4l0-21swapper/220:34:192
134491480,3ptp4l0-21swapper/222:03:052
134491480,3ptp4l0-21swapper/221:32:422
1367599472,4cyclictest33-21ksoftirqd/222:46:332
1367599472,3cyclictest121rcu_preempt23:23:452
1367599470,4cyclictest33-21ksoftirqd/221:00:282
1367499470,44cyclictest11622-21df_abs20:15:141
1367499470,24cyclictest11298-21runrttasks21:22:401
13673994732,5cyclictest9-21ksoftirqd/023:55:180
13673994729,6cyclictest9-21ksoftirqd/023:50:010
134491470,8ptp4l11350-21apt-get20:15:112
134491470,4ptp4l1367599cyclictest22:12:332
134491470,4ptp4l0-21swapper/222:24:282
134491470,10ptp4l0-21swapper/322:10:293
13677994631,4cyclictest41-21ksoftirqd/320:25:283
1367599461,9cyclictest33-21ksoftirqd/223:05:012
1367499460,21cyclictest5928-21ntpq21:10:231
134491460,4ptp4l0-21swapper/019:57:270
134491460,3ptp4l0-21swapper/322:21:503
134491460,3ptp4l0-21swapper/322:00:553
13677994531,4cyclictest41-21ksoftirqd/320:40:283
1367599455,3cyclictest33-21ksoftirqd/222:05:242
1367599452,2cyclictest121rcu_preempt00:36:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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