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2026-08-20 - 01:51
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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 highest latencies:
System rackdslot1.osadl.org (updated Wed Aug 19, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3043721550,5sleep31734499cyclictest08:45:273
17343997513,60cyclictest0-21swapper/208:55:282
134491700,23ptp4l21975-21/usr/sbin/munin07:20:263
17344996812,54cyclictest0-21swapper/311:12:293
134491660,5ptp4l0-21swapper/107:45:281
1734499651,62cyclictest0-21swapper/309:56:493
17343996430,3cyclictest33-21ksoftirqd/209:20:182
17343996329,4cyclictest33-21ksoftirqd/210:50:002
17344996215,45cyclictest0-21swapper/311:19:293
17343995926,4cyclictest33-21ksoftirqd/207:18:002
17343995825,4cyclictest33-21ksoftirqd/210:34:592
17343995725,4cyclictest33-21ksoftirqd/212:18:032
134491570,3ptp4l0-21swapper/211:15:002
17343995623,5cyclictest33-21ksoftirqd/212:00:202
17343995623,4cyclictest33-21ksoftirqd/210:21:032
17343995620,4cyclictest33-21ksoftirqd/210:01:482
134491560,4ptp4l0-21swapper/310:35:013
134491560,3ptp4l0-21swapper/310:45:463
134491560,3ptp4l0-21swapper/007:15:340
17343995527,8cyclictest33-21ksoftirqd/211:55:192
17343995522,4cyclictest33-21ksoftirqd/211:54:582
17343995521,4cyclictest33-21ksoftirqd/207:59:452
17343995520,3cyclictest33-21ksoftirqd/210:16:522
17343995519,4cyclictest33-21ksoftirqd/210:06:582
1734199550,7cyclictest556-21cron10:10:000
134491550,5ptp4l0-21swapper/307:08:443
134491550,5ptp4l0-21swapper/307:08:443
134491550,14ptp4l0-21swapper/307:35:183
134491550,10ptp4l0-21swapper/111:08:061
17343995423,3cyclictest33-21ksoftirqd/209:26:412
17343995422,5cyclictest33-21ksoftirqd/208:30:132
17343995421,5cyclictest33-21ksoftirqd/208:10:192
17343995420,6cyclictest33-21ksoftirqd/210:40:192
1734199547,3cyclictest9-21ksoftirqd/010:30:190
1734199540,7cyclictest101ktimersoftd/012:30:270
134491540,3ptp4l0-21swapper/011:30:190
17343995324,3cyclictest33-21ksoftirqd/209:09:162
17343995320,4cyclictest33-21ksoftirqd/209:16:082
17343995319,4cyclictest33-21ksoftirqd/210:52:512
1734199530,7cyclictest101ktimersoftd/010:25:000
1734199530,5cyclictest14764-21apt-get08:15:000
134491530,5ptp4l27329-21ps08:40:183
134491530,4ptp4l0-21swapper/208:00:362
134491530,4ptp4l0-21swapper/207:46:002
134491530,4ptp4l0-21swapper/107:29:511
17343995221,6cyclictest33-21ksoftirqd/211:00:252
17343995220,4cyclictest33-21ksoftirqd/212:21:492
17343995220,4cyclictest33-21ksoftirqd/209:56:032
17343995219,5cyclictest33-21ksoftirqd/212:35:212
17343995218,6cyclictest33-21ksoftirqd/209:01:442
17343995218,4cyclictest33-21ksoftirqd/208:28:142
17343995212,1cyclictest0-21swapper/212:08:502
1734199523,6cyclictest101ktimersoftd/010:35:130
1734199522,6cyclictest0-21swapper/010:55:230
134491520,4ptp4l0-21swapper/107:52:421
17343995122,6cyclictest33-21ksoftirqd/207:25:222
17343995120,4cyclictest33-21ksoftirqd/208:40:482
17343995119,7cyclictest33-21ksoftirqd/210:29:592
17343995119,6cyclictest33-21ksoftirqd/210:10:132
17343995119,6cyclictest33-21ksoftirqd/207:30:252
17343995118,4cyclictest33-21ksoftirqd/208:24:532
17343995117,5cyclictest33-21ksoftirqd/209:12:222
1734199513,6cyclictest9-21ksoftirqd/011:00:260
1734199512,5cyclictest0-21swapper/007:30:220
1734199511,6cyclictest9-21ksoftirqd/011:10:270
1734199511,5cyclictest0-21swapper/011:05:260
1734199510,8cyclictest101ktimersoftd/010:20:000
1734199510,6cyclictest162742chrt09:25:220
134491510,4ptp4l0-21swapper/307:49:573
134491510,4ptp4l0-21swapper/110:28:391
1734399509,9cyclictest33-21ksoftirqd/207:40:342
17343995022,7cyclictest33-21ksoftirqd/207:10:232
17343995021,6cyclictest33-21ksoftirqd/208:50:182
17343995019,4cyclictest33-21ksoftirqd/211:36:582
17343995015,6cyclictest33-21ksoftirqd/210:35:182
17343995015,4cyclictest33-21ksoftirqd/211:25:152
17343995014,4cyclictest33-21ksoftirqd/207:50:352
17343995013,7cyclictest33-21ksoftirqd/207:35:242
1734199500,8cyclictest9-21ksoftirqd/009:05:280
1734199500,7cyclictest28325-21head09:50:250
1734199500,6cyclictest101ktimersoftd/010:10:180
1734199500,47cyclictest101ktimersoftd/012:15:170
134491500,5ptp4l0-21swapper/207:08:362
134491500,5ptp4l0-21swapper/207:08:362
134491500,4ptp4l0-21swapper/110:57:001
134491500,4ptp4l0-21swapper/110:22:101
134491500,4ptp4l0-21swapper/109:30:161
134491500,4ptp4l0-21swapper/109:02:581
134491500,3ptp4l0-21swapper/307:40:323
1734499492,45cyclictest0-21swapper/311:50:083
17343994919,3cyclictest33-21ksoftirqd/212:25:182
17343994918,7cyclictest33-21ksoftirqd/211:30:222
17343994918,5cyclictest33-21ksoftirqd/208:35:132
17343994918,3cyclictest33-21ksoftirqd/211:45:272
17343994917,3cyclictest33-21ksoftirqd/211:22:292
17343994916,6cyclictest33-21ksoftirqd/212:32:452
17343994916,4cyclictest33-21ksoftirqd/209:53:302
17343994915,6cyclictest33-21ksoftirqd/210:55:292
17343994915,4cyclictest33-21ksoftirqd/208:47:222
1734199494,5cyclictest9-21ksoftirqd/012:10:250
1734199493,6cyclictest0-21swapper/009:00:240
1734199493,5cyclictest101ktimersoftd/011:55:180
1734199492,5cyclictest9-21ksoftirqd/009:15:180
1734199491,6cyclictest1039-21sed12:20:270
1734199491,10cyclictest0-21swapper/008:00:180
1734199490,6cyclictest9-21ksoftirqd/009:35:280
1734199490,6cyclictest9-21ksoftirqd/009:35:280
1734199490,6cyclictest24802-21grep08:35:140
1734199490,6cyclictest101ktimersoftd/008:20:190
1734199490,5cyclictest0-21swapper/008:45:280
134491490,4ptp4l0-21swapper/110:43:171
134491490,4ptp4l0-21swapper/107:39:261
134491490,4ptp4l0-21swapper/009:32:460
134491490,3ptp4l0-21swapper/208:18:072
17343994816,5cyclictest33-21ksoftirqd/208:08:452
17343994816,5cyclictest33-21ksoftirqd/208:08:452
17343994815,3cyclictest33-21ksoftirqd/209:36:372
17343994815,3cyclictest33-21ksoftirqd/209:36:372
17343994810,9cyclictest33-21ksoftirqd/211:09:072
1734199485,9cyclictest9-21ksoftirqd/007:10:290
1734199483,7cyclictest0-21swapper/011:29:300
1734199483,5cyclictest0-21swapper/008:05:170
1734199483,5cyclictest0-21swapper/008:05:170
1734199480,6cyclictest3896-21awk12:30:000
1734499472,43cyclictest0-21swapper/309:00:393
1734499472,2cyclictest0-21swapper/311:47:583
17343994734,6cyclictest33-21ksoftirqd/211:16:462
17343994716,5cyclictest33-21ksoftirqd/209:45:292
17343994716,3cyclictest33-21ksoftirqd/211:43:582
17343994714,7cyclictest33-21ksoftirqd/209:30:252
17343994711,7cyclictest33-21ksoftirqd/207:20:232
1734199475,5cyclictest9-21ksoftirqd/010:45:270
1734199472,5cyclictest0-21swapper/007:20:240
1734199472,10cyclictest0-21swapper/008:55:160
1734199470,7cyclictest101ktimersoftd/012:35:160
1734199470,6cyclictest9-21ksoftirqd/011:45:130
1734199470,6cyclictest10875-21chrt11:35:020
1734199470,2cyclictest134491ptp4l08:50:200
134491470,4ptp4l0-21swapper/308:23:283
134491470,4ptp4l0-21swapper/108:31:031
134491470,3ptp4l0-21swapper/109:36:351
134491470,3ptp4l0-21swapper/109:36:351
134491470,3ptp4l0-21swapper/010:01:460
134491470,2ptp4l0-21swapper/110:50:011
1734399466,8cyclictest33-21ksoftirqd/209:44:172
1734199462,6cyclictest0-21swapper/010:40:140
1734199462,5cyclictest0-21swapper/009:55:140
1734199462,2cyclictest0-21swapper/008:25:230
1734199461,5cyclictest25492-21proc_pri07:25:240
1734199461,5cyclictest101ktimersoftd/009:50:000
1734199460,6cyclictest9-21ksoftirqd/008:45:000
1734199460,6cyclictest101ktimersoftd/010:50:170
134491460,3ptp4l0-21swapper/110:34:081
134491460,3ptp4l0-21swapper/110:16:001
134491460,3ptp4l0-21swapper/108:49:151
17343994515,2cyclictest0-21swapper/212:13:162
1734199451,6cyclictest9-21ksoftirqd/007:50:110
1734199450,7cyclictest14475-21runrttasks09:20:280
1734199450,6cyclictest14739-21mailstats11:40:270
1734199450,5cyclictest101ktimersoftd/010:25:140
1734199450,5cyclictest0-21swapper/011:50:140
134491450,7ptp4l0-21swapper/308:56:173
134491450,4ptp4l0-21swapper/011:20:210
134491450,3ptp4l0-21swapper/110:13:261
1734199445,5cyclictest9-21ksoftirqd/009:40:180
1734199442,4cyclictest0-21swapper/012:09:180
1734199441,6cyclictest9-21ksoftirqd/009:10:190
1734199440,5cyclictest101ktimersoftd/007:35:190
134491440,5ptp4l15494-21if_enp1s007:05:161
134491440,5ptp4l15494-21if_enp1s007:05:161
134491440,4ptp4l0-21swapper/108:56:341
17341994339,2cyclictest111rcuc/007:45:240
1734199433,5cyclictest9-21ksoftirqd/011:17:530
1734199430,2cyclictest134691getstats07:40:160
134491430,5ptp4l8601-21apt-get11:30:123
134491430,5ptp4l0-21swapper/112:10:231
134491430,4ptp4l6305-21apt-get11:25:133
134491430,4ptp4l3086-21users11:15:311
134491430,4ptp4l1301-21snmpd12:20:131
134491430,3ptp4l8116-21apt-get08:00:123
134491430,3ptp4l0-21swapper/111:25:431
1734299425,7cyclictest25-21ksoftirqd/112:35:141
1734199425,6cyclictest9-21ksoftirqd/007:55:180
1734199423,7cyclictest9-21ksoftirqd/008:15:010
1734199422,4cyclictest0-21swapper/008:30:140
134491420,4ptp4l26693-21apt-get09:50:101
134491420,4ptp4l0-21swapper/109:44:101
134491420,3ptp4l20330-21apt-get11:55:141
134491420,3ptp4l1749-21apt-get12:25:121
134491420,3ptp4l0-21swapper/109:26:501
17342994136,3cyclictest25-21ksoftirqd/108:20:001
17342994136,2cyclictest25-21ksoftirqd/112:05:011
134491410,5ptp4l0-21swapper/310:40:203
134491410,5ptp4l0-21swapper/309:40:153
134491410,5ptp4l0-21swapper/112:15:161
134491410,5ptp4l0-21swapper/108:05:211
134491410,5ptp4l0-21swapper/108:05:211
134491410,4ptp4l18578-21/usr/sbin/munin11:50:151
134491410,4ptp4l17800-21hddtemp_smartct07:10:161
134491410,4ptp4l0-21swapper/309:20:133
134491410,4ptp4l0-21swapper/307:29:543
134491410,4ptp4l0-21swapper/109:59:021
134491410,3ptp4l5978-21apt-get09:05:131
134491410,3ptp4l29536-21apt-get12:15:143
134491410,3ptp4l22565-21diskstats10:50:151
134491410,3ptp4l0-21swapper/111:24:011
17342994036,2cyclictest25-21ksoftirqd/111:50:001
17342994035,3cyclictest25-21ksoftirqd/108:00:001
134491400,6ptp4l0-21swapper/007:05:300
134491400,6ptp4l0-21swapper/007:05:300
134491400,5ptp4l0-21swapper/012:00:200
134491400,4ptp4l4563-21ntp_states07:50:233
134491400,4ptp4l23089-21meminfo08:30:203
134491400,4ptp4l11519-21meminfo09:15:211
134491400,4ptp4l0-21swapper/308:35:123
134491400,4ptp4l0-21swapper/111:10:211
134491400,4ptp4l0-21swapper/110:05:121
134491400,4ptp4l0-21swapper/110:00:241
134491400,3ptp4l41-21ksoftirqd/308:52:483
134491400,3ptp4l28084-21ls07:30:261
134491400,3ptp4l27303-21hddtemp_smartct11:00:181
134491400,3ptp4l0-21swapper/109:24:161
17342993934,3cyclictest25-21ksoftirqd/108:20:261
17342993934,3cyclictest25-21ksoftirqd/107:20:191
17342993932,3cyclictest25-21ksoftirqd/111:35:011
134491390,5ptp4l0-21swapper/108:25:151
134491390,4ptp4l0-21swapper/312:31:343
134491390,4ptp4l0-21swapper/312:25:263
134491390,4ptp4l0-21swapper/312:21:263
134491390,4ptp4l0-21swapper/311:40:003
134491390,4ptp4l0-21swapper/311:04:453
134491390,4ptp4l0-21swapper/308:25:593
134491390,4ptp4l0-21swapper/308:15:173
134491390,4ptp4l0-21swapper/308:14:183
134491390,4ptp4l0-21swapper/308:05:283
134491390,4ptp4l0-21swapper/308:05:283
134491390,4ptp4l0-21swapper/110:35:161
134491390,4ptp4l0-21swapper/109:45:191
134491390,4ptp4l0-21swapper/108:51:151
134491390,4ptp4l0-21swapper/108:41:441
134491390,4ptp4l0-21swapper/108:40:011
134491390,4ptp4l0-21swapper/108:00:231
134491390,3ptp4l0-21swapper/307:55:123
134491390,2ptp4l26443-21ls12:05:271
17342993833,3cyclictest25-21ksoftirqd/109:10:281
1734299383,2cyclictest121rcu_preempt11:40:001
134491380,4ptp4l0-21swapper/312:09:453
134491380,4ptp4l0-21swapper/311:35:263
134491380,4ptp4l0-21swapper/311:24:173
134491380,4ptp4l0-21swapper/310:57:423
134491380,4ptp4l0-21swapper/310:39:383
134491380,4ptp4l0-21swapper/309:16:253
134491380,4ptp4l0-21swapper/307:32:553
134491380,4ptp4l0-21swapper/307:15:083
134491380,4ptp4l0-21swapper/307:10:293
134491380,4ptp4l0-21swapper/112:30:191
134491380,4ptp4l0-21swapper/111:36:581
134491380,4ptp4l0-21swapper/108:10:161
134491380,4ptp4l0-21swapper/107:45:011
134491380,4ptp4l0-21swapper/107:15:421
134491370,4ptp4l0-21swapper/311:07:013
134491370,4ptp4l0-21swapper/310:50:293
134491370,3ptp4l0-21swapper/309:34:373
134491370,3ptp4l0-21swapper/309:12:543
134491360,4ptp4l0-21swapper/312:35:273
134491360,3ptp4l0-21swapper/309:54:203
134491350,7ptp4l0-21swapper/310:16:583
134491350,4ptp4l0-21swapper/310:11:093
134491350,4ptp4l0-21swapper/309:36:253
134491350,4ptp4l0-21swapper/309:36:253
134491350,2ptp4l24785-21latency_hist12:05:013
134491340,3ptp4l0-21swapper/309:49:233
17344993327,4cyclictest41-21ksoftirqd/310:10:003
134491330,4ptp4l0-21swapper/311:55:393
134491320,3ptp4l0-21swapper/309:27:253
1734499291,2cyclictest0-21swapper/310:29:193
134491280,3ptp4l0-21swapper/309:05:423
134491240,4ptp4l0-21swapper/312:12:443
17344992318,3cyclictest41-21ksoftirqd/310:03:463
17344992116,3cyclictest41-21ksoftirqd/310:20:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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