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2026-09-16 - 07:40
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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 Wed Sep 16, 2026 00:45:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
351321390,5sleep22600499cyclictest20:40:172
2853121390,5sleep02600299cyclictest22:40:260
2600399647,7cyclictest22125-21latency_hist22:30:011
134491620,19ptp4l0-21swapper/119:05:171
266872610,3sleep20-21swapper/219:10:192
233572610,7sleep22600499cyclictest22:30:222
134491610,4ptp4l21986-21apt-get21:20:132
2600399608,7cyclictest0-21swapper/123:40:221
2600399606,6cyclictest10000-21cpuspeed_turbos19:45:141
2600399606,6cyclictest10000-21cpuspeed_turbos19:45:141
26002996028,3cyclictest9-21ksoftirqd/023:05:010
134491600,4ptp4l0-21swapper/019:15:160
134491600,4ptp4l0-21swapper/019:15:160
134491590,4ptp4l0-21swapper/121:38:131
134491580,4ptp4l0-21swapper/120:10:161
134491580,4ptp4l0-21swapper/020:46:100
134491580,3ptp4l0-21swapper/022:15:370
2600399577,7cyclictest0-21swapper/100:35:241
2600399575,6cyclictest29875-21cut23:55:191
26002995719,4cyclictest9-21ksoftirqd/020:40:000
134491570,4ptp4l0-21swapper/020:21:510
2600399566,6cyclictest20032-21tune2fs21:15:161
2600399565,9cyclictest26300-21cpuspeed20:20:151
2600399562,10cyclictest8725-21sed00:20:011
2600399561,12cyclictest3121-21grep22:55:321
26002995622,5cyclictest9-21ksoftirqd/021:55:000
26002995622,5cyclictest9-21ksoftirqd/021:55:000
134491560,4ptp4l0-21swapper/123:20:161
134491560,3ptp4l0-21swapper/019:55:310
134491560,2ptp4l0-21swapper/023:30:160
2600399557,7cyclictest0-21swapper/122:00:301
2600399555,5cyclictest25673-21grep22:35:201
26002995524,5cyclictest9-21ksoftirqd/022:45:210
134491550,4ptp4l0-21swapper/019:05:200
134491550,3ptp4l0-21swapper/022:31:110
2600399547,7cyclictest0-21swapper/100:00:261
2600399545,6cyclictest17776-21fschecks_time21:10:161
2600399543,9cyclictest28722-21date21:35:011
2600399542,6cyclictest30560-21basename22:45:261
26002995423,3cyclictest9-21ksoftirqd/023:25:010
2600399535,12cyclictest0-21swapper/121:00:151
2600399534,6cyclictest11069-21if_enp1s022:05:171
26002995321,4cyclictest9-21ksoftirqd/021:24:590
134491530,4ptp4l0-21swapper/020:29:330
134491530,3ptp4l10328-21dump-pmu-power22:05:010
2600399524,6cyclictest0-21swapper/120:45:191
2600399524,5cyclictest0-21swapper/119:35:261
2600399522,9cyclictest0-21swapper/120:40:141
26002995222,7cyclictest9-21ksoftirqd/019:25:290
26002995217,4cyclictest9-21ksoftirqd/019:35:000
134491520,4ptp4l0-21swapper/023:07:510
134491520,4ptp4l0-21swapper/020:34:330
134491520,3ptp4l0-21swapper/000:07:150
2600399512,5cyclictest0-21swapper/120:30:171
2600399512,16cyclictest3037-21switchtime00:05:261
2600399511,9cyclictest10540-21grep20:55:161
2600399511,5cyclictest0-21swapper/121:50:001
134491510,4ptp4l0-21swapper/023:59:270
134491510,4ptp4l0-21swapper/020:19:240
134491510,4ptp4l0-21swapper/020:19:240
2600399505,6cyclictest12922-21cut19:50:191
2600399505,5cyclictest23568-21awk21:20:291
2600399504,7cyclictest16654-21grep23:25:251
2600399504,13cyclictest8025-21latency_hist22:00:011
2600399500,10cyclictest18662-21sed20:00:281
134491500,4ptp4l0-21swapper/023:51:530
134491500,4ptp4l0-21swapper/023:49:220
134491500,4ptp4l0-21swapper/022:29:510
134491500,3ptp4l0-21swapper/320:00:063
134491500,2ptp4l30639-21/usr/sbin/munin19:20:132
134491500,12ptp4l0-21swapper/220:01:572
2600399497,5cyclictest27493-21sed19:10:271
2600399494,6cyclictest29077-21latency_hist23:55:001
2600399494,4cyclictest0-21swapper/119:20:201
2600399491,8cyclictest6393-21sed23:05:141
26002994919,6cyclictest9-21ksoftirqd/022:10:000
26002994917,5cyclictest9-21ksoftirqd/021:49:590
26002994916,4cyclictest9-21ksoftirqd/000:30:000
134491490,4ptp4l0-21swapper/222:43:492
134491490,4ptp4l0-21swapper/221:03:472
134491490,4ptp4l0-21swapper/200:25:142
134491490,4ptp4l0-21swapper/023:27:300
134491490,4ptp4l0-21swapper/022:57:430
134491490,4ptp4l0-21swapper/000:14:580
134491490,3ptp4l0-21swapper/020:55:500
2600399486,6cyclictest0-21swapper/121:25:181
2600399486,5cyclictest8085-21cstates20:50:131
2600399485,15cyclictest31958-21cut21:40:191
26002994817,3cyclictest9-21ksoftirqd/023:10:270
26002994813,5cyclictest9-21ksoftirqd/019:10:190
26002994812,7cyclictest9-21ksoftirqd/022:10:190
134491480,4ptp4l0-21swapper/319:16:313
134491480,4ptp4l0-21swapper/319:16:313
134491480,4ptp4l0-21swapper/119:42:451
134491480,4ptp4l0-21swapper/119:28:241
134491480,3ptp4l0-21swapper/119:18:491
134491480,3ptp4l0-21swapper/119:18:491
2600399476,7cyclictest12445-21switchtime00:25:251
2600399474,6cyclictest24498-21irqrtprio20:15:181
2600399474,6cyclictest24498-21irqrtprio20:15:181
2600399470,8cyclictest4249-21perl23:00:131
26002994719,4cyclictest9-21ksoftirqd/022:35:250
26002994715,4cyclictest9-21ksoftirqd/000:19:590
134491470,4ptp4l0-21swapper/319:44:063
134491470,4ptp4l0-21swapper/220:37:072
134491470,4ptp4l0-21swapper/219:41:252
134491470,4ptp4l0-21swapper/020:54:370
2600399462,4cyclictest0-21swapper/122:20:141
2600399462,4cyclictest0-21swapper/122:20:141
2600399460,7cyclictest20644-21taskset20:05:261
2600299466,7cyclictest9-21ksoftirqd/021:05:140
2600299464,3cyclictest121rcu_preempt00:35:000
26002994617,4cyclictest9-21ksoftirqd/000:20:270
26002994617,4cyclictest9-21ksoftirqd/000:20:270
134491460,4ptp4l12921-21apt-get22:10:132
134491460,10ptp4l0-21swapper/219:33:092
26003994538,4cyclictest4919-21grep21:50:251
26003994538,4cyclictest4919-21grep21:50:251
26002994517,6cyclictest9-21ksoftirqd/023:40:260
134491450,9ptp4l0-21swapper/222:45:272
134491450,4ptp4l31726-21apt-get00:00:132
134491450,4ptp4l0-21swapper/120:26:501
2600399446,6cyclictest17068-21cut21:10:001
2600399442,7cyclictest14669-21/usr/sbin/munin19:55:181
2600299449,4cyclictest9-21ksoftirqd/022:55:010
2600299449,4cyclictest9-21ksoftirqd/022:55:010
2600299440,6cyclictest121rcu_preempt19:20:280
134491440,9ptp4l0-21swapper/223:35:282
134491440,9ptp4l0-21swapper/223:24:512
134491440,9ptp4l0-21swapper/221:32:512
134491440,9ptp4l0-21swapper/219:37:102
134491440,8ptp4l0-21swapper/221:45:572
134491440,5ptp4l32675-21meminfo00:00:210
134491440,4ptp4l0-21swapper/119:34:261
134491440,4ptp4l0-21swapper/019:41:330
134491440,3ptp4l0-21swapper/319:20:193
2600399436,10cyclictest0-21swapper/122:41:431
2600399434,5cyclictest0-21swapper/120:35:181
26002994332,3cyclictest9-21ksoftirqd/019:50:000
26002994332,3cyclictest9-21ksoftirqd/019:50:000
26002994331,4cyclictest9-21ksoftirqd/021:15:140
26002994313,6cyclictest9-21ksoftirqd/020:05:160
134491430,9ptp4l0-21swapper/222:06:132
134491430,9ptp4l0-21swapper/219:49:512
134491430,9ptp4l0-21swapper/219:49:512
134491430,9ptp4l0-21swapper/200:23:062
134491430,9ptp4l0-21swapper/200:23:062
134491430,8ptp4l0-21swapper/222:51:492
134491430,8ptp4l0-21swapper/222:51:492
134491430,4ptp4l2318-21gnome-shell21:59:590
134491430,3ptp4l25784-21ls21:25:282
134491430,10ptp4l0-21swapper/222:26:432
2600399424,5cyclictest0-21swapper/122:30:161
2600399420,4cyclictest0-21swapper/122:20:001
26002994215,3cyclictest9-21ksoftirqd/021:35:180
134491420,9ptp4l0-21swapper/221:36:302
134491420,8ptp4l0-21swapper/223:17:132
134491420,7ptp4l0-21swapper/320:09:573
134491420,5ptp4l0-21swapper/220:30:292
134491420,4ptp4l8851-21hddtemp_smartct23:10:151
134491420,4ptp4l1499-21meminfo19:25:212
134491420,4ptp4l12390-21users23:15:281
134491420,4ptp4l11289-21iostat23:15:190
134491420,3ptp4l0-21swapper/100:11:001
134491420,3ptp4l0-21swapper/020:14:360
134491420,10ptp4l0-21swapper/219:16:532
134491420,10ptp4l0-21swapper/219:16:532
2600399411,6cyclictest25-21ksoftirqd/100:20:171
2600399411,6cyclictest25-21ksoftirqd/100:20:171
2600299418,4cyclictest9-21ksoftirqd/021:25:200
2600299413,7cyclictest121rcu_preempt21:40:180
26002994136,3cyclictest9-21ksoftirqd/019:50:190
26002994130,3cyclictest9-21ksoftirqd/021:32:160
2600299410,3cyclictest121rcu_preempt00:35:170
134491410,8ptp4l0-21swapper/220:29:512
134491410,5ptp4l3882-21sed19:30:213
134491410,5ptp4l0-21swapper/322:50:053
134491410,5ptp4l0-21swapper/322:50:053
134491410,5ptp4l0-21swapper/019:35:130
134491410,4ptp4l20782-21ntp_states21:15:232
134491410,4ptp4l0-21swapper/223:57:562
134491410,4ptp4l0-21swapper/220:05:202
134491410,4ptp4l0-21swapper/200:31:042
134491410,4ptp4l0-21swapper/123:35:131
134491410,4ptp4l0-21swapper/021:10:210
134491410,3ptp4l12865-21df_inode21:00:190
26004994036,3cyclictest33-21ksoftirqd/223:00:012
2600299409,4cyclictest9-21ksoftirqd/020:40:200
26002994034,3cyclictest9-21ksoftirqd/020:00:140
134491400,8ptp4l0-21swapper/223:52:012
134491400,5ptp4l0-21swapper/323:45:163
134491400,5ptp4l0-21swapper/321:25:143
134491400,5ptp4l0-21swapper/223:41:202
134491400,4ptp4l0-21swapper/321:35:253
134491400,4ptp4l0-21swapper/320:32:323
134491400,4ptp4l0-21swapper/223:25:232
134491400,4ptp4l0-21swapper/223:07:132
134491400,4ptp4l0-21swapper/222:37:022
134491400,4ptp4l0-21swapper/222:23:112
134491400,4ptp4l0-21swapper/222:23:112
134491400,4ptp4l0-21swapper/222:04:182
134491400,4ptp4l0-21swapper/221:58:372
134491400,4ptp4l0-21swapper/221:53:312
134491400,4ptp4l0-21swapper/221:53:312
134491400,4ptp4l0-21swapper/221:40:072
134491400,4ptp4l0-21swapper/221:07:202
134491400,4ptp4l0-21swapper/220:20:062
134491400,4ptp4l0-21swapper/220:13:252
134491400,4ptp4l0-21swapper/219:53:332
134491400,4ptp4l0-21swapper/200:35:082
134491400,4ptp4l0-21swapper/200:12:242
134491400,4ptp4l0-21swapper/123:46:251
134491400,4ptp4l0-21swapper/122:50:141
134491400,4ptp4l0-21swapper/122:50:141
134491400,4ptp4l0-21swapper/122:10:431
134491400,4ptp4l0-21swapper/022:20:050
134491400,4ptp4l0-21swapper/022:20:050
134491400,3ptp4l10614-21hddtemp_smartct20:55:173
2600399396,5cyclictest18123-21sed23:30:171
134491390,5ptp4l0-21swapper/223:45:212
134491390,5ptp4l0-21swapper/220:56:112
134491390,4ptp4l41-21ksoftirqd/319:45:263
134491390,4ptp4l41-21ksoftirqd/319:45:263
134491390,4ptp4l2106-21sed21:45:193
134491390,4ptp4l0-21swapper/322:36:253
134491390,4ptp4l0-21swapper/322:20:233
134491390,4ptp4l0-21swapper/322:20:233
134491390,4ptp4l0-21swapper/322:05:233
134491390,4ptp4l0-21swapper/321:53:153
134491390,4ptp4l0-21swapper/321:53:153
134491390,4ptp4l0-21swapper/321:24:163
134491390,4ptp4l0-21swapper/321:10:293
134491390,4ptp4l0-21swapper/320:50:273
134491390,4ptp4l0-21swapper/320:15:153
134491390,4ptp4l0-21swapper/320:15:153
134491390,4ptp4l0-21swapper/319:55:573
134491390,4ptp4l0-21swapper/319:50:183
134491390,4ptp4l0-21swapper/319:35:273
134491390,4ptp4l0-21swapper/319:28:503
134491390,4ptp4l0-21swapper/319:11:413
134491390,4ptp4l0-21swapper/223:31:182
134491390,4ptp4l0-21swapper/223:11:342
134491390,4ptp4l0-21swapper/223:02:592
134491390,4ptp4l0-21swapper/222:15:062
134491390,4ptp4l0-21swapper/221:10:382
134491390,4ptp4l0-21swapper/220:45:352
134491390,4ptp4l0-21swapper/219:56:282
134491390,4ptp4l0-21swapper/200:15:242
134491390,3ptp4l21095-21ntp_states23:35:230
134491390,3ptp4l0-21swapper/322:30:373
134491390,3ptp4l0-21swapper/300:22:293
134491390,3ptp4l0-21swapper/300:22:293
134491390,3ptp4l0-21swapper/300:02:093
134491390,3ptp4l0-21swapper/200:06:092
134491380,4ptp4l0-21swapper/323:42:593
134491380,4ptp4l0-21swapper/323:36:083
134491380,4ptp4l0-21swapper/323:28:203
134491380,4ptp4l0-21swapper/323:21:573
134491380,4ptp4l0-21swapper/323:18:243
134491380,4ptp4l0-21swapper/323:00:133
134491380,4ptp4l0-21swapper/322:40:193
134491380,4ptp4l0-21swapper/322:15:173
134491380,4ptp4l0-21swapper/321:56:363
134491380,4ptp4l0-21swapper/320:29:153
134491380,4ptp4l0-21swapper/320:13:043
134491380,4ptp4l0-21swapper/220:50:092
134491380,4ptp4l0-21swapper/220:16:542
134491380,4ptp4l0-21swapper/220:16:542
134491380,3ptp4l0-21swapper/323:12:193
134491380,3ptp4l0-21swapper/322:55:143
134491380,3ptp4l0-21swapper/300:16:043
134491380,3ptp4l0-21swapper/300:14:543
134491380,3ptp4l0-21swapper/100:30:281
134491370,4ptp4l0-21swapper/323:31:213
134491370,4ptp4l0-21swapper/321:30:113
134491370,4ptp4l0-21swapper/321:07:483
134491370,3ptp4l0-21swapper/323:55:533
134491370,3ptp4l0-21swapper/322:00:383
134491370,3ptp4l0-21swapper/321:41:273
134491370,3ptp4l0-21swapper/320:20:073
134491370,3ptp4l0-21swapper/300:38:363
134491370,3ptp4l0-21swapper/300:27:253
134491370,3ptp4l0-21swapper/300:07:293
134491360,4ptp4l0-21swapper/323:53:563
134491360,4ptp4l0-21swapper/323:07:193
134491360,4ptp4l0-21swapper/322:45:073
134491360,4ptp4l0-21swapper/322:13:373
134491360,4ptp4l0-21swapper/321:03:273
134491360,3ptp4l0-21swapper/321:19:563
134491360,3ptp4l0-21swapper/320:44:273
134491360,3ptp4l0-21swapper/300:30:453
134491350,4ptp4l0-21swapper/322:26:453
134491340,4ptp4l0-21swapper/320:37:083
26005993329,3cyclictest41-21ksoftirqd/320:45:263
137891255,11phc2sys0-21swapper/319:05:113
137891142,6phc2sys0-21swapper/219:08:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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