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2026-04-19 - 11:47
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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 Sun Apr 19, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2268997613,21cyclictest3324-21latency_hist23:50:003
2268997516,12cyclictest28295-21chrt22:23:173
2268997215,11cyclictest18025-21taskset19:42:023
2268997116,19cyclictest9342-21taskset20:32:023
2268997116,12cyclictest25748-21taskset21:07:233
2268997116,11cyclictest27641-21taskset20:04:283
2268997111,11cyclictest418-21cron21:25:003
2268997015,18cyclictest8910-21chrt19:23:483
2268997015,12cyclictest9657-21taskset22:52:003
2268996916,11cyclictest24273-21chrt00:34:473
2268996916,10cyclictest1324-21cut21:25:173
2268996816,19cyclictest2104-21taskset20:16:203
2268996816,11cyclictest9625-21taskset21:40:483
2268996816,11cyclictest26285-21taskset00:36:123
2268996815,18cyclictest10014-21taskset00:04:103
2268996815,11cyclictest30879-21taskset23:39:593
2268996815,11cyclictest25188-21taskset19:57:463
2268996814,11cyclictest11572-21taskset20:36:103
2268996716,16cyclictest28153-21taskset21:13:423
2268996716,12cyclictest4959-21taskset21:32:543
2268996716,12cyclictest19931-21taskset00:25:093
2268996715,10cyclictest25847-21taskset22:16:433
2268996714,12cyclictest5368-21chrt23:53:513
2268996615,17cyclictest5010-21taskset22:41:183
2268996614,10cyclictest22729-21taskset19:50:443
2268996611,12cyclictest14472-21awk00:10:273
226699665,17cyclictest15275-21grep19:35:261
2268996516,10cyclictest25857-21seq23:27:163
2268996516,10cyclictest25857-21seq23:27:163
2268996515,11cyclictest19501-21chrt00:22:363
2268996515,10cyclictest404-21chrt23:40:483
2268996515,10cyclictest23595-21taskset23:22:423
2268996514,11cyclictest23627-21chrt21:04:303
2268996414,15cyclictest4370-21sed20:20:263
2268996316,17cyclictest7534-21chrt23:57:163
2268996314,17cyclictest21245-21taskset23:17:163
2268996312,11cyclictest3715-21sed19:10:253
226699638,15cyclictest17456-21cut23:10:151
2266996311,11cyclictest11908-21chrt22:56:241
134491630,4ptp4l10218-21apt-get21:45:122
2268996210,10cyclictest28949-21hwlatdetect21:15:163
226699629,9cyclictest32034-21ps21:20:241
2266996211,10cyclictest19653-21df_abs23:15:131
134491620,5ptp4l0-21swapper/020:00:210
2268996115,15cyclictest11431-21processes21:45:253
2268996115,11cyclictest13349-21taskset19:31:553
134491610,4ptp4l0-21swapper/121:45:221
226699604,11cyclictest27154-21cut22:20:191
2266996010,14cyclictest12422-21taskset00:08:091
134491600,6ptp4l2252-21cpufreq19:10:020
134491600,4ptp4l0-21swapper/223:21:462
2268995918,11cyclictest32394-21taskset20:13:493
2268995912,16cyclictest13100-21cut20:40:183
226699598,17cyclictest14602-21cat23:04:591
226699596,16cyclictest0-21swapper/119:40:141
134491590,6ptp4l0-21swapper/019:09:200
134491590,4ptp4l0-21swapper/022:17:380
134491590,3ptp4l30964-21/usr/sbin/munin22:30:190
2268995818,17cyclictest20468-21taskset19:48:503
2268995817,15cyclictest18910-21runrttasks23:11:513
2268995815,40cyclictest13460-21memory21:50:203
226699589,17cyclictest29270-21grep20:05:261
226699588,9cyclictest9334-21mailstats00:00:251
226699586,10cyclictest134491ptp4l22:30:151
2266995810,15cyclictest2674-21sed23:45:251
2266995810,14cyclictest21552-21sed00:25:301
2268995717,11cyclictest6594-21taskset19:18:493
2268995717,11cyclictest12235-21taskset00:05:453
226699576,11cyclictest6381-21cut22:45:191
226699575,12cyclictest19727-21fschecks_time20:55:171
2266995710,14cyclictest9228-21chrt20:30:341
2266995710,11cyclictest9655-21taskset22:51:591
134491570,5ptp4l0-21swapper/000:30:560
134491570,4ptp4l0-21swapper/020:33:350
134491570,15ptp4l32414-21/usr/sbin/munin19:05:133
2268995618,6cyclictest13582-21ntp_states23:00:233
2268995617,18cyclictest7531-21taskset21:38:353
2268995615,9cyclictest7037-21runrttasks20:26:563
226699568,9cyclictest26031-21sed00:35:261
226699567,10cyclictest20876-21sed22:05:271
2266995610,11cyclictest28031-21chrt21:12:141
2266995610,10cyclictest4301-21taskset19:13:551
134491560,4ptp4l0-21swapper/023:48:340
134491560,4ptp4l0-21swapper/019:58:080
2268995517,11cyclictest2878-21taskset22:38:363
2268995517,11cyclictest21400-21taskset22:08:273
226899551,13cyclictest0-21swapper/322:59:593
226699558,8cyclictest0-21swapper/119:15:161
226699558,11cyclictest15081-21perl20:45:151
226699556,10cyclictest30181-21date22:25:271
226699555,10cyclictest22234-21/usr/sbin/munin00:30:241
134491550,4ptp4l0-21swapper/200:25:352
134491550,4ptp4l0-21swapper/022:59:560
134491550,11ptp4l1243-21python19:05:251
2268995417,20cyclictest18881-21taskset20:52:493
2268995415,9cyclictest28288-21taskset23:31:173
2268995415,11cyclictest1317-21runrttasks20:09:593
2268995411,14cyclictest21297-21runrttasks20:59:203
134491540,4ptp4l0-21swapper/023:41:020
134491540,4ptp4l0-21swapper/021:46:240
134491540,4ptp4l0-21swapper/021:36:070
134491540,4ptp4l0-21swapper/020:53:530
2268995314,12cyclictest1301-21snmpd22:00:303
226699539,15cyclictest18726-21cstates19:45:131
134491530,4ptp4l0-21swapper/000:21:520
2268995217,17cyclictest23514-21taskset22:11:123
2268995217,17cyclictest23514-21taskset22:11:123
2268995216,12cyclictest7492-21taskset22:48:383
226699522,9cyclictest0-21swapper/121:00:091
134491520,4ptp4l0-21swapper/022:22:370
134491520,4ptp4l0-21swapper/020:23:420
2268995117,16cyclictest16808-21taskset23:09:153
2268995114,7cyclictest15813-21memory21:55:213
2268995113,7cyclictest9561-21df_inode19:25:153
2268995112,8cyclictest29246-21iostat22:25:183
2266995110,8cyclictest8714-21chrt19:21:221
134491510,5ptp4l0-21swapper/022:07:260
134491510,3ptp4l24922-21cat21:05:220
2268995016,11cyclictest17097-21taskset00:16:283
226699509,17cyclictest15220-21cp00:15:011
226699509,10cyclictest30403-21ls23:35:271
226699506,9cyclictest351-21awk23:40:281
2266995010,14cyclictest32134-21chrt20:10:321
134491500,4ptp4l0-21swapper/221:56:542
134491500,4ptp4l0-21swapper/023:38:360
134491500,4ptp4l0-21swapper/019:39:570
134491500,4ptp4l0-21swapper/000:04:040
2268994919,26cyclictest15417-21ls19:35:273
226699496,8cyclictest2235-21ls21:25:261
2268994811,7cyclictest14645-21/usr/sbin/munin20:45:223
226799483,43cyclictest0-21swapper/223:00:292
226699488,9cyclictest134691getstats19:50:161
226699487,9cyclictest0-21swapper/123:27:031
226699487,9cyclictest0-21swapper/123:27:031
134491480,9ptp4l9630-21munin-node19:05:122
134491480,4ptp4l0-21swapper/019:18:550
226699477,5cyclictest0-21swapper/119:56:021
226699475,10cyclictest10460-21sed20:35:201
226699474,9cyclictest25372-21mailstats22:15:261
134491470,4ptp4l0-21swapper/200:38:572
134491470,3ptp4l0-21swapper/100:13:001
134491470,3ptp4l0-21swapper/022:11:120
134491470,3ptp4l0-21swapper/022:11:120
226799462,2cyclictest121rcu_preempt23:55:592
226799461,2cyclictest121rcu_preempt22:22:592
2267994611,9cyclictest33-21ksoftirqd/221:35:002
226799460,3cyclictest121rcu_preempt23:35:592
226699467,10cyclictest0-21swapper/122:36:491
226699465,8cyclictest30746-21cut21:20:001
2266994612,12cyclictest11063-21taskset19:27:011
134491460,4ptp4l0-21swapper/021:27:580
134491460,4ptp4l0-21swapper/019:50:150
134491460,3ptp4l0-21swapper/022:41:430
134491460,3ptp4l0-21swapper/021:04:100
226799452,2cyclictest121rcu_preempt23:29:592
226799452,2cyclictest121rcu_preempt23:29:592
226799451,2cyclictest121rcu_preempt22:43:052
226799451,2cyclictest121rcu_preempt22:32:592
226699458,14cyclictest2888-21cpuspeed_turbos20:20:121
226699456,5cyclictest0-21swapper/121:57:491
134491450,6ptp4l0-21swapper/122:04:221
134491450,4ptp4l6962-21apt-get19:20:132
134491450,4ptp4l0-21swapper/022:27:510
134491450,4ptp4l0-21swapper/000:29:380
134491450,3ptp4l121rcu_preempt22:41:441
134491450,3ptp4l0-21swapper/219:26:232
134491450,3ptp4l0-21swapper/020:11:000
134491450,12ptp4l0-21swapper/219:40:262
226799448,4cyclictest33-21ksoftirqd/223:20:002
2267994432,3cyclictest33-21ksoftirqd/222:25:132
226799441,2cyclictest121rcu_preempt23:07:592
226799440,2cyclictest121rcu_preempt22:12:592
226799440,2cyclictest121rcu_preempt22:12:592
226799440,2cyclictest121rcu_preempt20:10:032
2264994439,3cyclictest9-21ksoftirqd/022:40:000
134491440,8ptp4l0-21swapper/200:00:402
134491440,5ptp4l0-21swapper/019:45:200
134491440,4ptp4l18077-21perl00:20:161
134491440,4ptp4l0-21swapper/023:30:540
134491440,4ptp4l0-21swapper/000:13:060
134491440,3ptp4l0-21swapper/220:39:552
2267994338,3cyclictest33-21ksoftirqd/223:35:012
2267994338,3cyclictest33-21ksoftirqd/221:15:002
2267994337,3cyclictest33-21ksoftirqd/221:25:002
226799433,2cyclictest121rcu_preempt21:26:242
226799432,2cyclictest121rcu_preempt21:04:302
226799430,6cyclictest121rcu_preempt21:07:392
226799430,3cyclictest121rcu_preempt22:03:592
2264994337,3cyclictest9-21ksoftirqd/021:00:000
134491430,9ptp4l0-21swapper/223:10:222
134491430,9ptp4l0-21swapper/222:06:252
134491430,9ptp4l0-21swapper/219:39:002
134491430,9ptp4l0-21swapper/200:20:362
134491430,8ptp4l0-21swapper/223:52:082
134491430,5ptp4l0-21swapper/221:35:032
134491430,4ptp4l11557-21apt-get19:30:131
134491430,4ptp4l0-21swapper/021:55:350
134491430,4ptp4l0-21swapper/020:17:250
134491430,3ptp4l0-21swapper/020:05:590
226799422,2cyclictest121rcu_preempt19:51:192
2264994237,3cyclictest9-21ksoftirqd/021:20:000
134491420,9ptp4l0-21swapper/222:38:462
134491420,9ptp4l0-21swapper/220:21:252
134491420,9ptp4l0-21swapper/219:49:452
134491420,9ptp4l0-21swapper/219:34:332
134491420,8ptp4l0-21swapper/200:16:482
134491420,5ptp4l0-21swapper/021:50:120
134491420,4ptp4l18124-21ntp_states20:50:232
134491420,4ptp4l17182-21apt-get22:00:120
134491420,4ptp4l11888-21apt-get20:40:021
134491420,4ptp4l0-21swapper/123:09:201
134491420,4ptp4l0-21swapper/023:20:140
134491420,4ptp4l0-21swapper/023:03:360
134491420,4ptp4l0-21swapper/021:34:550
134491420,4ptp4l0-21swapper/019:44:390
134491420,3ptp4l0-21swapper/020:28:380
226899419,5cyclictest137891phc2sys22:31:143
226799419,4cyclictest33-21ksoftirqd/219:10:142
2267994135,3cyclictest33-21ksoftirqd/220:10:002
226799410,6cyclictest121rcu_preempt21:15:292
2264994137,3cyclictest9-21ksoftirqd/020:45:000
2264994136,3cyclictest9-21ksoftirqd/020:40:010
134491410,9ptp4l0-21swapper/219:58:272
134491410,8ptp4l0-21swapper/220:31:372
134491410,5ptp4l25131-21ntp_kernel_pll_23:25:220
134491410,5ptp4l25131-21ntp_kernel_pll_23:25:220
134491410,5ptp4l0-21swapper/121:40:161
134491410,5ptp4l0-21swapper/121:05:211
134491410,5ptp4l0-21swapper/023:10:270
134491410,5ptp4l0-21swapper/022:50:100
134491410,4ptp4l4534-21ntp_states23:50:240
134491410,4ptp4l13226-21users19:30:290
134491410,4ptp4l0-21swapper/220:15:492
134491410,4ptp4l0-21swapper/200:13:382
134491410,4ptp4l0-21swapper/123:55:141
134491410,4ptp4l0-21swapper/000:35:030
134491410,3ptp4l7980-21ls19:20:220
134491410,3ptp4l0-21swapper/123:33:351
2267994033,3cyclictest33-21ksoftirqd/220:45:132
2267994029,10cyclictest33-21ksoftirqd/222:50:242
226799401,2cyclictest121rcu_preempt22:45:252
226699407,13cyclictest26483-21irqstats20:00:211
2264994036,3cyclictest9-21ksoftirqd/019:25:190
2264994035,3cyclictest9-21ksoftirqd/023:55:210
2264994034,4cyclictest9-21ksoftirqd/021:20:250
134491400,8ptp4l0-21swapper/220:29:312
134491400,5ptp4l0-21swapper/120:25:011
134491400,4ptp4l0-21swapper/222:15:382
134491400,4ptp4l0-21swapper/220:41:342
134491400,4ptp4l0-21swapper/023:06:140
134491400,4ptp4l0-21swapper/022:46:530
134491400,4ptp4l0-21swapper/021:13:120
134491400,4ptp4l0-21swapper/000:18:280
134491400,3ptp4l8864-21meminfo21:40:200
134491400,3ptp4l6171-21iostat_ios21:35:181
134491400,3ptp4l4367-21/usr/sbin/munin23:50:221
134491400,3ptp4l1916-21ls20:15:271
134491400,3ptp4l12510-21apt-get21:50:111
134491400,3ptp4l11895-21ls00:05:270
2267993935,2cyclictest33-21ksoftirqd/223:40:242
226799390,3cyclictest121rcu_preempt23:45:112
134491390,4ptp4l0-21swapper/221:52:122
134491390,4ptp4l0-21swapper/221:43:002
134491390,4ptp4l0-21swapper/220:56:532
134491390,4ptp4l0-21swapper/220:04:472
134491390,4ptp4l0-21swapper/219:16:502
134491390,4ptp4l0-21swapper/200:30:362
134491390,4ptp4l0-21swapper/200:05:482
134491390,4ptp4l0-21swapper/121:30:181
134491390,4ptp4l0-21swapper/120:50:211
134491390,4ptp4l0-21swapper/023:15:100
134491390,4ptp4l0-21swapper/020:45:570
134491390,3ptp4l22046-21diskstats23:20:141
134491390,3ptp4l21775-21apt-get22:10:101
134491390,3ptp4l21775-21apt-get22:10:101
134491380,3ptp4l0-21swapper/222:55:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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