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2026-05-23 - 00:18
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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 376 highest latencies:
System rackdslot1.osadl.org (updated Fri May 22, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19312996833,4cyclictest41-21ksoftirqd/312:20:183
19312996328,10cyclictest41-21ksoftirqd/310:15:263
19312996230,4cyclictest41-21ksoftirqd/307:55:133
19312996226,9cyclictest41-21ksoftirqd/308:20:193
19312996128,8cyclictest41-21ksoftirqd/311:20:173
19312996028,8cyclictest41-21ksoftirqd/312:10:133
134491600,4ptp4l0-21swapper/211:30:032
19312995929,7cyclictest41-21ksoftirqd/310:30:223
19312995928,6cyclictest41-21ksoftirqd/309:50:193
19312995925,7cyclictest41-21ksoftirqd/307:25:143
19309995927,5cyclictest9-21ksoftirqd/009:10:010
19309995922,5cyclictest9-21ksoftirqd/011:10:230
19312995830,8cyclictest41-21ksoftirqd/308:25:153
19312995823,8cyclictest41-21ksoftirqd/311:00:163
19309995828,3cyclictest9-21ksoftirqd/009:45:210
19309995827,3cyclictest9-21ksoftirqd/009:15:140
19309995824,5cyclictest9-21ksoftirqd/010:50:150
134491580,5ptp4l0-21swapper/107:07:361
134491580,5ptp4l0-21swapper/107:07:361
1931299573,5cyclictest14954-21awk11:40:013
19309995728,3cyclictest9-21ksoftirqd/007:59:160
19309995726,4cyclictest9-21ksoftirqd/012:35:410
19309995726,4cyclictest9-21ksoftirqd/011:44:550
19309995725,4cyclictest9-21ksoftirqd/010:00:390
19309995724,4cyclictest9-21ksoftirqd/011:21:230
19309995723,4cyclictest9-21ksoftirqd/009:34:520
134491570,4ptp4l0-21swapper/011:45:300
134491570,3ptp4l0-21swapper/311:50:163
134491570,12ptp4l0-21swapper/007:18:430
19312995624,8cyclictest41-21ksoftirqd/309:20:163
19312995622,8cyclictest41-21ksoftirqd/310:50:003
19312995622,7cyclictest41-21ksoftirqd/309:25:153
19312995621,4cyclictest41-21ksoftirqd/311:30:143
1931299561,11cyclictest19560-21grep11:50:003
19309995630,8cyclictest9-21ksoftirqd/010:43:520
19309995622,3cyclictest9-21ksoftirqd/009:21:440
134491560,3ptp4l0-21swapper/211:22:362
1931299555,9cyclictest41-21ksoftirqd/309:15:273
1931299554,8cyclictest41-21ksoftirqd/310:45:013
19312995518,4cyclictest41-21ksoftirqd/310:55:003
19309995526,4cyclictest9-21ksoftirqd/008:33:290
19309995526,3cyclictest9-21ksoftirqd/011:50:280
19309995526,3cyclictest9-21ksoftirqd/009:25:150
19309995525,4cyclictest9-21ksoftirqd/010:58:070
19309995524,4cyclictest9-21ksoftirqd/009:53:090
19309995522,6cyclictest9-21ksoftirqd/012:06:080
19309995522,4cyclictest9-21ksoftirqd/009:04:350
134491550,4ptp4l0-21swapper/108:26:481
134491550,3ptp4l0-21swapper/108:10:281
1931299546,7cyclictest41-21ksoftirqd/310:10:013
19312995422,7cyclictest41-21ksoftirqd/312:00:163
19312995421,8cyclictest41-21ksoftirqd/308:35:003
19309995425,3cyclictest9-21ksoftirqd/009:58:500
19309995424,4cyclictest9-21ksoftirqd/007:37:170
134491540,4ptp4l0-21swapper/008:28:080
134491540,3ptp4l0-21swapper/208:25:002
1931299535,9cyclictest41-21ksoftirqd/310:35:263
19312995323,9cyclictest41-21ksoftirqd/308:05:013
19312995322,8cyclictest41-21ksoftirqd/307:20:133
19309995325,7cyclictest9-21ksoftirqd/011:05:140
19309995325,6cyclictest9-21ksoftirqd/007:14:090
19309995325,5cyclictest9-21ksoftirqd/010:29:120
19309995323,4cyclictest9-21ksoftirqd/012:35:000
19309995322,6cyclictest9-21ksoftirqd/011:25:190
19309995322,5cyclictest9-21ksoftirqd/010:45:070
19309995320,3cyclictest9-21ksoftirqd/009:13:040
134491530,4ptp4l0-21swapper/207:39:372
134491530,4ptp4l0-21swapper/108:41:111
134491530,4ptp4l0-21swapper/107:44:111
134491530,3ptp4l0-21swapper/212:14:342
1931299525,2cyclictest121rcu_preempt08:03:493
1931299524,7cyclictest41-21ksoftirqd/310:55:183
1931299523,6cyclictest7766-21awk09:05:013
1931299522,7cyclictest0-21swapper/312:35:153
1931299522,7cyclictest0-21swapper/308:54:213
19312995224,3cyclictest41-21ksoftirqd/307:30:163
19312995218,8cyclictest41-21ksoftirqd/307:14:393
1931299520,13cyclictest41-21ksoftirqd/312:30:103
1930999523,3cyclictest9-21ksoftirqd/009:00:000
19309995224,7cyclictest9-21ksoftirqd/012:10:200
19309995222,3cyclictest9-21ksoftirqd/010:15:220
19309995221,4cyclictest9-21ksoftirqd/012:18:000
19309995220,3cyclictest9-21ksoftirqd/008:37:110
19309995212,7cyclictest9-21ksoftirqd/012:25:170
134491520,4ptp4l0-21swapper/211:14:462
134491520,4ptp4l0-21swapper/210:45:012
134491520,3ptp4l0-21swapper/211:53:472
1931299514,10cyclictest41-21ksoftirqd/309:55:273
1931299513,7cyclictest41-21ksoftirqd/307:45:293
1931299512,7cyclictest0-21swapper/311:15:203
1931299512,7cyclictest0-21swapper/311:15:203
19312995117,8cyclictest41-21ksoftirqd/307:15:173
1931299510,12cyclictest41-21ksoftirqd/312:25:133
19309995122,4cyclictest9-21ksoftirqd/011:55:150
19309995112,6cyclictest9-21ksoftirqd/010:35:230
134491510,5ptp4l0-21swapper/208:30:472
134491510,4ptp4l0-21swapper/212:17:162
134491510,3ptp4l0-21swapper/108:55:151
134491510,11ptp4l0-21swapper/208:51:452
1931299507,3cyclictest121rcu_preempt08:43:093
1931299505,7cyclictest41-21ksoftirqd/310:25:263
1931299505,7cyclictest41-21ksoftirqd/309:45:283
1931299505,7cyclictest41-21ksoftirqd/309:05:193
1931299505,2cyclictest121rcu_preempt11:44:463
1931299504,6cyclictest41-21ksoftirqd/310:25:003
1931299502,9cyclictest41-21ksoftirqd/309:40:233
19312995023,9cyclictest41-21ksoftirqd/309:30:213
1931299501,6cyclictest41-21ksoftirqd/308:55:183
19309995020,4cyclictest9-21ksoftirqd/010:24:500
19309995020,4cyclictest9-21ksoftirqd/007:30:430
19309995019,3cyclictest9-21ksoftirqd/007:41:020
19309995012,6cyclictest9-21ksoftirqd/008:50:150
134491500,3ptp4l0-21swapper/209:10:172
1931299494,7cyclictest12448-21apt-config09:15:003
1931299494,6cyclictest41-21ksoftirqd/311:10:013
1931299493,9cyclictest41-21ksoftirqd/311:10:223
1931299492,6cyclictest0-21swapper/307:35:183
1931299490,6cyclictest41-21ksoftirqd/311:55:283
19309994924,7cyclictest9-21ksoftirqd/008:05:320
19309994923,3cyclictest9-21ksoftirqd/008:47:530
19309994921,6cyclictest9-21ksoftirqd/007:50:260
19309994920,3cyclictest9-21ksoftirqd/011:40:000
19309994920,3cyclictest9-21ksoftirqd/010:14:230
134491490,4ptp4l0-21swapper/208:02:092
134491490,4ptp4l0-21swapper/108:09:551
134491490,18ptp4l9-21ksoftirqd/007:05:130
134491490,18ptp4l9-21ksoftirqd/007:05:130
1931299485,2cyclictest121rcu_preempt08:18:293
1931299483,8cyclictest41-21ksoftirqd/307:50:273
1931299483,6cyclictest41-21ksoftirqd/308:40:003
1931299482,6cyclictest41-21ksoftirqd/310:10:263
19309994823,6cyclictest9-21ksoftirqd/012:20:130
19309994812,4cyclictest9-21ksoftirqd/011:15:140
19309994812,4cyclictest9-21ksoftirqd/011:15:130
134491480,4ptp4l0-21swapper/108:15:111
1931299472,7cyclictest41-21ksoftirqd/307:40:133
1931299471,6cyclictest41-21ksoftirqd/312:05:043
1931299471,5cyclictest41-21ksoftirqd/310:00:243
1931299470,8cyclictest41-21ksoftirqd/312:15:263
1931299470,7cyclictest41-21ksoftirqd/309:37:493
1930999473,6cyclictest9-21ksoftirqd/008:00:150
19309994721,6cyclictest9-21ksoftirqd/007:26:040
19309994719,5cyclictest9-21ksoftirqd/007:20:510
19309994716,6cyclictest9-21ksoftirqd/011:30:180
134491470,4ptp4l0-21swapper/008:41:430
134491470,3ptp4l0-21swapper/211:39:562
1931299462,6cyclictest41-21ksoftirqd/308:14:333
19309994616,5cyclictest9-21ksoftirqd/010:30:210
134491460,3ptp4l7104-21ls09:00:261
134491460,3ptp4l0-21swapper/110:30:241
134491460,3ptp4l0-21swapper/110:10:031
1931299451,7cyclictest41-21ksoftirqd/311:25:143
1930999453,2cyclictest9-21ksoftirqd/009:39:490
19309994515,6cyclictest9-21ksoftirqd/010:05:250
1930999450,2cyclictest9-21ksoftirqd/011:00:290
134491450,9ptp4l18617-21ntp_states11:45:222
134491450,4ptp4l24463-21apt-get10:50:112
134491450,3ptp4l0-21swapper/110:20:181
134491450,3ptp4l0-21swapper/107:58:071
134491450,3ptp4l0-21swapper/009:40:110
134491450,2ptp4l0-21swapper/109:43:221
1931299442,7cyclictest41-21ksoftirqd/308:45:173
1930999449,5cyclictest9-21ksoftirqd/007:45:190
1930999441,2cyclictest121rcu_preempt08:20:160
134491440,9ptp4l0-21swapper/212:24:202
134491440,4ptp4l0-21swapper/207:58:462
134491440,3ptp4l0-21swapper/110:04:001
134491440,3ptp4l0-21swapper/107:54:091
134491440,15ptp4l25-21ksoftirqd/111:07:051
134491440,10ptp4l0-21swapper/210:55:222
1930999431,2cyclictest121rcu_preempt12:00:180
134491430,9ptp4l0-21swapper/210:05:492
134491430,9ptp4l0-21swapper/208:44:312
134491430,9ptp4l0-21swapper/207:45:542
134491430,6ptp4l26658-21df08:35:151
134491430,4ptp4l26713-21apt-get12:05:111
134491430,3ptp4l0-21swapper/212:09:542
134491430,3ptp4l0-21swapper/212:04:502
134491430,10ptp4l0-21swapper/208:49:262
1930999425,3cyclictest12142-21kworker/0:108:13:360
134491420,9ptp4l0-21swapper/210:31:112
134491420,9ptp4l0-21swapper/210:18:272
134491420,9ptp4l0-21swapper/209:03:282
134491420,9ptp4l0-21swapper/208:24:512
134491420,4ptp4l0-21swapper/211:44:502
134491420,4ptp4l0-21swapper/109:35:121
134491420,3ptp4l8751-21diskstats12:35:162
134491420,3ptp4l17547-21apt-get10:35:121
134491420,3ptp4l0-21swapper/207:10:072
134491420,3ptp4l0-21swapper/110:15:291
46198410,4rtkit-daemon0-21swapper/209:34:542
134491410,9ptp4l0-21swapper/210:39:342
134491410,5ptp4l26617-21apt-get09:45:121
134491410,4ptp4l27063-21diskstats10:55:141
134491410,4ptp4l20990-21ntp_states10:40:231
134491410,4ptp4l16156-21memory11:40:221
134491410,3ptp4l6303-21diskstats11:20:141
134491410,3ptp4l28911-21apt-get09:50:121
134491410,3ptp4l20130-21iostat_ios08:20:181
134491410,3ptp4l19341-21apt-get07:10:121
134491410,3ptp4l14521-21ls10:25:262
134491410,10ptp4l0-21swapper/207:18:582
134491400,7ptp4l31219-21latency_hist12:14:591
134491400,5ptp4l1931099cyclictest07:49:521
134491400,5ptp4l0-21swapper/112:30:131
134491400,5ptp4l0-21swapper/108:30:151
134491400,4ptp4l7258-21ntp_states12:30:222
134491400,4ptp4l32327-21ntp_states09:55:231
134491400,4ptp4l31823-21df_inode12:15:151
134491400,4ptp4l2312-21/usr/sbin/munin12:20:191
134491400,4ptp4l19047-21grep09:25:272
134491400,4ptp4l17800-21iostat_ios08:15:170
134491400,4ptp4l1572-21diskstats11:10:141
134491400,4ptp4l0-21swapper/208:55:272
134491400,4ptp4l0-21swapper/111:55:241
134491400,4ptp4l0-21swapper/107:25:101
134491400,3ptp4l4734-21ntp_states11:15:221
134491400,3ptp4l4734-21ntp_states11:15:221
134491400,3ptp4l4325-21irqstats10:05:181
134491400,3ptp4l29490-21ls07:30:191
134491400,3ptp4l26561-21diskstats07:25:132
134491390,5ptp4l0-21swapper/111:30:281
134491390,5ptp4l0-21swapper/109:25:011
134491390,4ptp4l16373-21/usr/sbin/munin09:20:231
134491390,4ptp4l12593-21gpgv08:05:012
134491390,4ptp4l0-21swapper/212:27:352
134491390,4ptp4l0-21swapper/211:26:572
134491390,4ptp4l0-21swapper/211:01:102
134491390,4ptp4l0-21swapper/210:47:292
134491390,4ptp4l0-21swapper/210:00:522
134491390,4ptp4l0-21swapper/209:58:242
134491390,4ptp4l0-21swapper/209:51:022
134491390,4ptp4l0-21swapper/209:45:592
134491390,4ptp4l0-21swapper/209:41:152
134491390,4ptp4l0-21swapper/209:35:032
134491390,4ptp4l0-21swapper/209:07:192
134491390,4ptp4l0-21swapper/208:16:542
134491390,4ptp4l0-21swapper/207:31:262
134491390,4ptp4l0-21swapper/207:22:262
134491390,4ptp4l0-21swapper/112:35:141
134491390,4ptp4l0-21swapper/112:25:151
134491390,4ptp4l0-21swapper/112:02:171
134491390,4ptp4l0-21swapper/111:45:161
134491390,4ptp4l0-21swapper/111:25:201
134491390,4ptp4l0-21swapper/110:45:111
134491390,4ptp4l0-21swapper/108:50:171
134491390,4ptp4l0-21swapper/107:15:191
134491390,3ptp4l32269-21ls07:35:291
134491390,3ptp4l13097-21df11:35:141
134491390,3ptp4l0-21swapper/109:15:171
134491380,5ptp4l0-21swapper/211:05:252
134491380,4ptp4l0-21swapper/211:55:172
134491380,4ptp4l0-21swapper/211:15:182
134491380,4ptp4l0-21swapper/211:15:182
134491380,4ptp4l0-21swapper/210:11:482
134491380,4ptp4l0-21swapper/209:15:392
134491380,4ptp4l0-21swapper/208:36:032
134491380,4ptp4l0-21swapper/207:53:282
134491380,4ptp4l0-21swapper/207:42:242
134491380,4ptp4l0-21swapper/111:50:261
134491380,4ptp4l0-21swapper/110:51:061
134491380,4ptp4l0-21swapper/110:25:121
134491380,4ptp4l0-21swapper/109:34:321
134491380,4ptp4l0-21swapper/109:10:251
134491380,4ptp4l0-21swapper/108:45:271
134491380,4ptp4l0-21swapper/108:00:231
134491380,4ptp4l0-21swapper/107:20:171
134491380,3ptp4l0-21swapper/208:10:192
46198370,4rtkit-daemon0-21swapper/210:20:312
134491370,3ptp4l0-21swapper/209:20:352
134491370,3ptp4l0-21swapper/111:00:181
134491370,3ptp4l0-21swapper/109:05:201
184032235,10sleep318543-21ls07:05:273
184032235,10sleep318543-21ls07:05:273
137891235,11phc2sys0-21swapper/207:05:272
137891235,11phc2sys0-21swapper/207:05:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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