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2026-08-30 - 05:10
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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 792 highest latencies:
System rackdslot1.osadl.org (updated Sun Aug 30, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
639821410,3sleep1508599cyclictest22:40:171
508699687,59cyclictest0-21swapper/222:10:292
134491680,4ptp4l0-21swapper/119:40:131
508799618,11cyclictest30533-21taskset21:14:433
508699602,7cyclictest19256-21sendmail21:59:592
134491590,4ptp4l0-21swapper/219:40:192
134491590,4ptp4l0-21swapper/219:08:132
134491590,3ptp4l0-21swapper/121:57:061
508799589,10cyclictest9436-21taskset19:19:423
508799580,17cyclictest19903-21hddtemp_smartct22:00:153
508699587,6cyclictest0-21swapper/222:30:272
508699581,11cyclictest134491ptp4l00:00:222
134491580,5ptp4l0-21swapper/300:26:073
134491580,5ptp4l0-21swapper/300:23:383
134491580,4ptp4l0-21swapper/100:10:281
134491580,3ptp4l32738-21python23:35:261
508799578,11cyclictest9912-21taskset21:38:553
134491570,3ptp4l0-21swapper/022:20:240
134491560,5ptp4l0-21swapper/221:47:562
134491560,4ptp4l0-21swapper/223:51:322
134491560,3ptp4l0-21swapper/000:10:240
134491560,11ptp4l0-21swapper/000:15:210
508799559,11cyclictest28127-21taskset21:08:183
508799558,6cyclictest0-21swapper/320:55:243
5087995510,7cyclictest0-21swapper/322:55:133
508699557,6cyclictest0-21swapper/221:15:232
134491550,4ptp4l0-21swapper/122:15:191
134491550,4ptp4l0-21swapper/100:05:421
134491550,4ptp4l0-21swapper/022:58:480
508799549,15cyclictest16833-21taskset21:54:073
508699548,7cyclictest0-21swapper/200:10:202
508699534,7cyclictest1026-21date22:30:002
134491530,4ptp4l0-21swapper/119:19:571
508699528,7cyclictest0-21swapper/222:45:242
134491520,4ptp4l0-21swapper/019:52:020
134491520,4ptp4l0-21swapper/000:24:340
134491520,10ptp4l0-21swapper/122:09:101
508799512,2cyclictest134491ptp4l22:40:003
508699517,7cyclictest0-21swapper/223:40:002
508699517,11cyclictest0-21swapper/220:48:232
508699517,11cyclictest0-21swapper/219:50:132
134491510,4ptp4l0-21swapper/223:45:182
134491510,4ptp4l0-21swapper/119:26:141
134491510,4ptp4l0-21swapper/023:06:060
134491510,4ptp4l0-21swapper/019:13:340
508699507,6cyclictest0-21swapper/221:30:222
508699502,6cyclictest0-21swapper/222:55:002
134491500,4ptp4l0-21swapper/021:32:140
134491500,4ptp4l0-21swapper/020:12:010
134491500,4ptp4l0-21swapper/020:06:530
508699492,5cyclictest0-21swapper/221:35:552
134491490,5ptp4l0-21swapper/319:09:473
134491490,4ptp4l0-21swapper/121:54:241
134491490,4ptp4l0-21swapper/020:26:590
134491490,4ptp4l0-21swapper/020:19:310
508799488,7cyclictest0-21swapper/323:15:303
508799488,6cyclictest0-21swapper/320:50:133
508799487,6cyclictest0-21swapper/323:55:273
508799487,6cyclictest0-21swapper/322:30:163
508799487,6cyclictest0-21swapper/321:30:273
508699488,6cyclictest0-21swapper/223:55:242
508699488,11cyclictest0-21swapper/223:25:252
508699484,5cyclictest29070-21sendmail-msp00:40:002
508699482,24cyclictest0-21swapper/222:04:052
134491480,5ptp4l0-21swapper/122:49:481
134491480,4ptp4l0-21swapper/100:25:521
134491480,4ptp4l0-21swapper/023:53:500
134491480,3ptp4l0-21swapper/120:17:011
134491480,3ptp4l0-21swapper/019:45:260
134491480,3ptp4l0-21swapper/019:45:260
134491480,2ptp4l0-21swapper/021:51:300
508799478,6cyclictest0-21swapper/322:40:173
508799478,6cyclictest0-21swapper/320:00:143
508799477,6cyclictest0-21swapper/323:10:123
508799474,17cyclictest0-21swapper/321:00:133
508799471,10cyclictest0-21swapper/320:50:013
508699478,11cyclictest0-21swapper/220:30:172
508699478,10cyclictest0-21swapper/221:25:162
508699477,10cyclictest0-21swapper/220:17:152
134491470,4ptp4l0-21swapper/023:31:270
134491470,4ptp4l0-21swapper/019:17:090
134491470,4ptp4l0-21swapper/000:09:480
134491470,3ptp4l0-21swapper/000:27:120
508799466,7cyclictest10311-21cpu21:40:133
508799466,11cyclictest11461-21chrt19:21:043
508799461,13cyclictest20440-21mailstats19:40:243
508799461,10cyclictest0-21swapper/319:30:193
508699468,11cyclictest0-21swapper/200:25:272
508699467,7cyclictest0-21swapper/223:10:152
508699467,5cyclictest0-21swapper/220:40:162
508699463,7cyclictest29810-21ntp_states22:20:232
508699460,10cyclictest0-21swapper/219:45:262
508699460,10cyclictest0-21swapper/219:45:262
134491460,4ptp4l0-21swapper/119:56:471
134491460,4ptp4l0-21swapper/022:46:560
134491460,3ptp4l0-21swapper/023:44:540
134491460,11ptp4l0-21swapper/219:20:132
508799457,11cyclictest0-21swapper/320:35:213
508799456,6cyclictest0-21swapper/323:00:263
508799451,11cyclictest7790-21/usr/sbin/munin20:25:153
508699455,7cyclictest0-21swapper/222:40:132
508699455,5cyclictest0-21swapper/223:40:172
508699455,5cyclictest0-21swapper/219:31:482
508699453,8cyclictest0-21swapper/223:16:442
5084994540,3cyclictest9-21ksoftirqd/022:40:000
134491450,5ptp4l0-21swapper/019:08:270
134491450,4ptp4l0-21swapper/023:45:250
134491450,3ptp4l0-21swapper/122:25:111
134491450,3ptp4l0-21swapper/120:39:471
134491450,3ptp4l0-21swapper/120:11:311
134491450,3ptp4l0-21swapper/019:36:200
134491450,10ptp4l0-21swapper/119:35:221
508699446,6cyclictest0-21swapper/220:50:152
508699446,11cyclictest0-21swapper/221:00:172
508699445,6cyclictest0-21swapper/222:35:232
508699445,6cyclictest0-21swapper/221:10:182
508699445,6cyclictest0-21swapper/220:24:442
5086994440,2cyclictest311rcuc/219:25:242
134491440,9ptp4l0-21swapper/123:52:591
134491440,4ptp4l26941-21apt-get00:35:120
134491440,4ptp4l26372-21apt-get22:15:122
134491440,4ptp4l24504-21apt-get23:20:123
134491440,4ptp4l0-21swapper/123:30:381
134491440,4ptp4l0-21swapper/119:54:151
134491440,3ptp4l0-21swapper/122:23:381
134491440,3ptp4l0-21swapper/023:24:570
134491440,3ptp4l0-21swapper/021:23:460
134491440,10ptp4l0-21swapper/320:20:233
508699437,5cyclictest0-21swapper/222:55:272
508699436,6cyclictest0-21swapper/221:20:252
508699436,6cyclictest0-21swapper/220:10:142
508699435,6cyclictest0-21swapper/220:00:572
508699433,4cyclictest0-21swapper/223:09:282
134491430,9ptp4l0-21swapper/322:13:103
134491430,9ptp4l0-21swapper/123:40:211
134491430,9ptp4l0-21swapper/119:33:171
134491430,4ptp4l28514-21apt-get21:10:130
134491430,3ptp4l29093-21apt-get23:30:102
134491430,3ptp4l0-21swapper/123:22:121
508799427,12cyclictest0-21swapper/319:55:173
508799422,5cyclictest0-21swapper/320:11:053
508699425,6cyclictest0-21swapper/221:05:242
508699424,6cyclictest0-21swapper/220:55:192
508699423,6cyclictest0-21swapper/220:09:412
5085994229,4cyclictest25-21ksoftirqd/120:01:421
134491420,7ptp4l0-21swapper/300:15:003
134491420,6ptp4l0-21swapper/119:09:071
134491420,5ptp4l31973-21memory21:15:201
134491420,5ptp4l24283-21df22:10:141
134491420,5ptp4l0-21swapper/300:15:173
134491420,5ptp4l0-21swapper/220:25:372
134491420,4ptp4l29592-21ls20:00:200
134491420,4ptp4l27511-21iostat_ios00:35:193
134491420,4ptp4l27365-21iostat23:25:181
134491420,4ptp4l20104-21meminfo19:40:200
134491420,4ptp4l0-21swapper/022:16:300
134491420,4ptp4l0-21swapper/021:39:380
134491420,4ptp4l0-21swapper/020:55:210
134491420,3ptp4l28221-21ls23:25:260
134491420,13ptp4l0-21swapper/021:15:230
508799413,30cyclictest0-21swapper/319:49:583
508799413,30cyclictest0-21swapper/319:49:583
508799410,7cyclictest134491ptp4l22:50:263
134491410,9ptp4l0-21swapper/323:39:263
134491410,6ptp4l508499cyclictest20:40:200
134491410,5ptp4l20350-21df_inode00:20:142
134491410,5ptp4l19785-21diskstats22:00:141
134491410,5ptp4l0-21swapper/321:50:003
134491410,5ptp4l0-21swapper/221:50:212
134491410,5ptp4l0-21swapper/123:10:211
134491410,4ptp4l7041-21memory22:40:220
134491410,4ptp4l16631-21python23:00:242
134491410,4ptp4l14711-21apt-get20:40:111
134491410,4ptp4l11402-21users19:20:270
134491410,4ptp4l10942-21df_inode00:00:160
134491410,4ptp4l0-21swapper/121:30:201
134491410,4ptp4l0-21swapper/100:36:421
134491410,4ptp4l0-21swapper/022:11:110
134491410,4ptp4l0-21swapper/022:01:420
134491410,4ptp4l0-21swapper/020:24:290
134491410,3ptp4l30875-21apt-get20:05:123
134491410,3ptp4l28301-21ls23:25:273
134491410,3ptp4l25338-21ls21:00:260
134491410,3ptp4l10098-21apt-get20:30:121
134491410,10ptp4l0-21swapper/123:15:121
508799408,6cyclictest0-21swapper/321:16:573
508799403,6cyclictest0-21swapper/321:25:213
508699402,11cyclictest0-21swapper/219:11:072
5084994035,3cyclictest9-21ksoftirqd/020:00:010
134691400,10getstats0-21swapper/023:01:240
134491400,5ptp4l27121-21latency21:05:200
134491400,5ptp4l0-21swapper/323:45:173
134491400,5ptp4l0-21swapper/223:20:212
134491400,5ptp4l0-21swapper/120:20:111
134491400,4ptp4l23503-21apt-get19:50:013
134491400,4ptp4l18665-21ls00:15:201
134491400,4ptp4l0-21swapper/323:50:193
134491400,4ptp4l0-21swapper/323:40:243
134491400,4ptp4l0-21swapper/222:05:262
134491400,4ptp4l0-21swapper/123:55:211
134491400,4ptp4l0-21swapper/122:50:181
134491400,4ptp4l0-21swapper/122:40:011
134491400,4ptp4l0-21swapper/121:00:121
134491400,4ptp4l0-21swapper/100:30:141
134491400,4ptp4l0-21swapper/023:59:240
134491400,4ptp4l0-21swapper/023:17:040
134491400,4ptp4l0-21swapper/020:35:170
134491400,4ptp4l0-21swapper/019:30:210
134491400,4ptp4l0-21swapper/000:30:240
134491400,3ptp4l27889-21users21:05:291
134491400,3ptp4l11597-21ls20:30:270
134491400,3ptp4l0-21swapper/021:27:080
134491400,2ptp4l22955-21ls19:45:261
134491400,2ptp4l22955-21ls19:45:261
508699390,5cyclictest33-21ksoftirqd/221:40:182
134491390,5ptp4l0-21swapper/300:07:503
134491390,4ptp4l2450-21ps22:30:250
134491390,4ptp4l18231-21irqrtprio23:05:183
134491390,4ptp4l0-21swapper/323:30:543
134491390,4ptp4l0-21swapper/322:45:103
134491390,4ptp4l0-21swapper/322:26:433
134491390,4ptp4l0-21swapper/322:18:533
134491390,4ptp4l0-21swapper/322:07:183
134491390,4ptp4l0-21swapper/320:30:153
134491390,4ptp4l0-21swapper/320:18:203
134491390,4ptp4l0-21swapper/319:39:263
134491390,4ptp4l0-21swapper/319:25:253
134491390,4ptp4l0-21swapper/300:00:303
134491390,4ptp4l0-21swapper/219:55:222
134491390,4ptp4l0-21swapper/200:15:382
134491390,4ptp4l0-21swapper/123:45:281
134491390,4ptp4l0-21swapper/123:00:031
134491390,4ptp4l0-21swapper/122:32:071
134491390,4ptp4l0-21swapper/121:10:221
134491390,4ptp4l0-21swapper/120:46:131
134491390,4ptp4l0-21swapper/120:05:161
134491390,4ptp4l0-21swapper/023:35:390
134491390,4ptp4l0-21swapper/022:25:260
134491390,4ptp4l0-21swapper/021:57:010
134491390,4ptp4l0-21swapper/021:40:360
134491390,4ptp4l0-21swapper/020:45:210
134491390,3ptp4l19591-21df_abs20:50:140
134491390,3ptp4l0-21swapper/119:22:541
134491390,3ptp4l0-21swapper/022:07:460
134491380,5ptp4l0-21swapper/322:20:133
134491380,5ptp4l0-21swapper/123:07:101
134491380,5ptp4l0-21swapper/122:56:321
134491380,4ptp4l0-21swapper/321:57:323
134491380,4ptp4l0-21swapper/320:42:593
134491380,4ptp4l0-21swapper/319:10:223
134491380,4ptp4l0-21swapper/300:30:243
134491380,4ptp4l0-21swapper/220:35:182
134491380,4ptp4l0-21swapper/219:35:242
134491380,4ptp4l0-21swapper/219:15:112
134491380,4ptp4l0-21swapper/200:30:142
134491380,4ptp4l0-21swapper/200:05:062
134491380,4ptp4l0-21swapper/121:45:181
134491380,4ptp4l0-21swapper/121:35:301
134491380,4ptp4l0-21swapper/120:25:391
134491380,4ptp4l0-21swapper/119:11:401
134491380,4ptp4l0-21swapper/100:25:011
134491380,4ptp4l0-21swapper/100:03:381
134491380,4ptp4l0-21swapper/019:26:210
134491380,3ptp4l13112-21if_err_enp4s021:45:190
134491380,3ptp4l0-21swapper/121:40:061
134491380,3ptp4l0-21swapper/120:50:121
134491380,3ptp4l0-21swapper/022:50:160
134491370,4ptp4l0-21swapper/321:20:213
134491370,4ptp4l0-21swapper/023:10:120
134491370,3ptp4l0-21swapper/121:25:241
134491370,3ptp4l0-21swapper/121:20:291
134491370,3ptp4l0-21swapper/120:56:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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