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2026-04-18 - 03:17
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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
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackbslot7.osadl.org (updated Sat Apr 18, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1666991132,83cyclictest8284-21apt-get22:48:180
1686999949,10cyclictest181rcu_preempt22:04:112
95929811,61sleep21012-21cat18:58:422
1686999716,51cyclictest9055-21diskmemload21:33:172
1686999716,51cyclictest9055-21diskmemload21:33:172
168699962,76cyclictest8284-21apt-get22:48:122
1686999537,24cyclictest9844-21ssh21:03:232
1686999444,12cyclictest181rcu_preempt00:24:042
166699942,66cyclictest31997-21kworker/u18:0+ext4-rsv-conversion22:03:260
1678999331,39cyclictest1657-21cyclictest21:08:331
1678999331,39cyclictest1657-21cyclictest21:08:331
1678998967,14cyclictest9055-21diskmemload00:18:011
118192890,7sleep00-21swapper/023:48:050
118192890,7sleep00-21swapper/023:48:050
1686998819,31cyclictest0-21swapper/219:38:012
166699882,69cyclictest27985-21ssh21:33:340
166699882,69cyclictest27985-21ssh21:33:340
1686998761,18cyclictest1119-21latency_hist21:43:002
1686998753,12cyclictest181rcu_preempt23:44:072
1686998746,8cyclictest181rcu_preempt23:48:292
1686998746,8cyclictest181rcu_preempt23:48:292
1666998764,14cyclictest18998-21ssh21:18:280
1666998764,14cyclictest18998-21ssh21:18:280
1666998756,22cyclictest277-21dbus-daemon23:27:570
166699872,75cyclictest2848-21kworker/u18:2+flush-179:019:18:230
1686998663,15cyclictest2374-21systemd-journal19:39:462
1666998669,11cyclictest300-21rs:main0
1666998654,8cyclictest181rcu_preempt19:36:560
1666998640,15cyclictest7277-21latency_hist19:18:010
1666998547,26cyclictest24709-21ssh21:28:280
1686998458,7cyclictest181rcu_preempt00:16:042
1686998444,8cyclictest181rcu_preempt20:43:232
1686998443,11cyclictest297-21systemd-logind21:03:002
1686998442,12cyclictest181rcu_preempt21:23:292
1686998442,12cyclictest181rcu_preempt21:23:292
166699843,32cyclictest15-21ksoftirqd/023:03:560
1686998356,9cyclictest181rcu_preempt22:38:282
1686998344,12cyclictest181rcu_preempt23:14:242
1678998368,10cyclictest1657-21cyclictest22:34:241
1666998358,7cyclictest181rcu_preempt23:15:140
1686998267,8cyclictest6535-21ntpq23:38:252
1686998267,8cyclictest6535-21ntpq23:38:252
1686998245,8cyclictest181rcu_preempt19:28:292
166699822,66cyclictest30529-21kworker/u18:1+ext4-rsv-conversion19:23:230
166699822,66cyclictest30529-21kworker/u18:1+ext4-rsv-conversion19:23:230
1686998161,13cyclictest2374-21systemd-journal23:07:082
1686998153,21cyclictest15225-21if_err_eth023:53:222
1686998152,20cyclictest11673-21ssh22:53:212
1686998144,11cyclictest181rcu_preempt00:03:192
1686998143,10cyclictest181rcu_preempt21:46:212
1678998164,10cyclictest9557-21sh23:43:291
1678998162,13cyclictest9917-21netstat21:03:251
1678998161,14cyclictest17576-21unixbench_multi22:08:341
1678998161,14cyclictest17576-21unixbench_multi22:08:341
1666998164,10cyclictest16456-21ssh22:08:010
1666998164,10cyclictest16456-21ssh22:08:010
1666998118,29cyclictest15-21ksoftirqd/022:23:330
168699806,63cyclictest9228-21apt-get19:23:322
168699806,63cyclictest9228-21apt-get19:23:322
1686998052,9cyclictest181rcu_preempt22:23:152
1686998046,13cyclictest181rcu_preempt19:18:552
1678998056,18cyclictest5259-21idleruntime-cro19:12:571
1666998061,13cyclictest30490-21sh00:18:320
105742800,6sleep09055-21diskmemload21:58:190
1686997956,9cyclictest181rcu_preempt23:21:042
1686997956,9cyclictest181rcu_preempt23:21:042
1686997947,10cyclictest181rcu_preempt19:53:012
1686997942,12cyclictest181rcu_preempt20:13:012
1686997922,21cyclictest0-21swapper/221:48:132
1678997964,10cyclictest1657-21cyclictest20:46:461
1678997918,23cyclictest14781-21sort19:38:311
1678997918,22cyclictest29110-21fschecks_time20:23:201
1666997953,7cyclictest181rcu_preempt21:23:520
1666997953,7cyclictest181rcu_preempt21:23:520
1686997859,13cyclictest21163-21mailstats19:58:302
1686997842,9cyclictest181rcu_preempt00:02:562
1686997842,8cyclictest181rcu_preempt20:28:012
1686997841,14cyclictest181rcu_preempt21:08:142
1686997841,14cyclictest181rcu_preempt21:08:142
1686997833,13cyclictest181rcu_preempt19:53:192
1686997819,33cyclictest0-21swapper/221:15:382
1678997819,19cyclictest19539-21ssh22:13:071
1678997816,25cyclictest28080-21sh21:33:501
1678997816,25cyclictest28080-21sh21:33:501
166699783,50cyclictest15-21ksoftirqd/023:53:380
1666997818,31cyclictest15-21ksoftirqd/000:03:170
1686997745,11cyclictest181rcu_preempt22:43:322
1686997741,18cyclictest181rcu_preempt23:23:282
1686997740,8cyclictest181rcu_preempt22:01:552
1686997722,22cyclictest0-21swapper/223:37:552
1678997757,14cyclictest19354-21timerwakeupswit21:18:341
1678997757,14cyclictest19354-21timerwakeupswit21:18:341
1678997720,18cyclictest17194-21latency_hist19:48:001
1666997760,10cyclictest15064-21systemctl21:12:570
1666997760,10cyclictest15064-21systemctl21:12:570
1666997750,11cyclictest181rcu_preempt21:39:040
1666997749,7cyclictest181rcu_preempt00:31:420
1666997749,20cyclictest26721-21latency_hist00:13:010
1686997646,13cyclictest181rcu_preempt19:08:322
1686997643,7cyclictest181rcu_preempt22:37:462
1686997643,13cyclictest181rcu_preempt21:18:352
1686997643,13cyclictest181rcu_preempt21:18:352
1686997642,13cyclictest181rcu_preempt23:12:592
1686997641,12cyclictest181rcu_preempt22:13:272
1686997632,18cyclictest2782-21apt-config23:33:012
1686997632,18cyclictest2782-21apt-config23:33:012
1686997624,20cyclictest0-21swapper/222:08:192
1686997624,20cyclictest0-21swapper/222:08:192
1686997611,34cyclictest24656-21sh21:28:182
1678997656,14cyclictest31207-21threads20:28:321
1678997656,14cyclictest31207-21threads20:28:321
1678997621,22cyclictest2707-21timerwakeupswit19:03:331
1678997620,11cyclictest18428-21ntp_states23:58:271
1678997619,27cyclictest19676-21snmpd22:53:081
1678997618,19cyclictest31289-21ssh21:38:231
1666997657,11cyclictest297-21systemd-logind23:42:580
1666997657,11cyclictest297-21systemd-logind23:42:580
1666997644,9cyclictest181rcu_preempt20:46:100
1666997637,13cyclictest181rcu_preempt22:57:460
1666997619,33cyclictest15-21ksoftirqd/019:38:310
1666997617,34cyclictest15-21ksoftirqd/020:37:590
1666997617,33cyclictest15-21ksoftirqd/019:58:140
1666997617,31cyclictest15-21ksoftirqd/020:33:010
1686997555,8cyclictest181rcu_preempt20:28:312
1686997555,8cyclictest181rcu_preempt20:28:312
1686997547,11cyclictest181rcu_preempt20:18:152
1686997544,14cyclictest181rcu_preempt00:10:112
1686997523,22cyclictest0-21swapper/222:28:302
1686997523,11cyclictest181rcu_preempt22:18:312
1686997521,31cyclictest0-21swapper/221:58:012
167899755,31cyclictest0-21swapper/100:18:331
1678997528,9cyclictest0-21swapper/122:38:321
1678997523,14cyclictest9055-21diskmemload21:58:081
1678997521,17cyclictest9055-21diskmemload23:03:031
167899751,31cyclictest25356-21sendmail20:12:571
1666997561,7cyclictest0-21swapper/022:42:330
1666997555,7cyclictest181rcu_preempt21:52:230
1666997542,8cyclictest181rcu_preempt20:19:290
1666997540,12cyclictest3454-21munin-node23:20:490
1666997540,12cyclictest3454-21munin-node23:20:490
1666997540,10cyclictest181rcu_preempt20:41:080
166699753,34cyclictest15-21ksoftirqd/022:28:280
1666997519,31cyclictest15-21ksoftirqd/020:13:200
1666997514,37cyclictest15-21ksoftirqd/021:57:200
1666997514,37cyclictest15-21ksoftirqd/000:25:390
1666997512,32cyclictest15-21ksoftirqd/019:09:060
1686997449,10cyclictest181rcu_preempt20:08:002
1678997458,10cyclictest11911-21cpu23:48:131
1678997458,10cyclictest11911-21cpu23:48:131
1678997451,16cyclictest13342-21apt-key22:03:021
1678997428,10cyclictest0-21swapper/123:21:141
1678997428,10cyclictest0-21swapper/123:21:141
1666997453,8cyclictest181rcu_preempt23:34:030
1666997434,12cyclictest181rcu_preempt23:58:290
1666997434,10cyclictest181rcu_preempt00:15:510
1666997431,12cyclictest181rcu_preempt22:34:240
166699742,39cyclictest15-21ksoftirqd/023:01:310
166699742,29cyclictest15-21ksoftirqd/019:43:300
1666997418,32cyclictest15-21ksoftirqd/019:03:140
166699741,39cyclictest15-21ksoftirqd/023:08:140
1666997413,35cyclictest15-21ksoftirqd/022:13:330
1666997411,35cyclictest15-21ksoftirqd/022:43:220
1686997344,9cyclictest181rcu_preempt20:53:082
1686997344,8cyclictest181rcu_preempt19:03:132
1686997343,10cyclictest181rcu_preempt20:48:072
1686997314,18cyclictest0-21swapper/200:28:142
1678997354,13cyclictest25224-21latency_hist22:23:001
1678997354,12cyclictest277-21dbus-daemon21:57:591
167899735,29cyclictest0-21swapper/120:17:591
1678997324,12cyclictest0-21swapper/120:37:471
1678997318,18cyclictest1413-21fschecks_count20:38:181
1666997351,8cyclictest181rcu_preempt21:47:590
1666997319,30cyclictest15-21ksoftirqd/023:31:500
1666997319,30cyclictest15-21ksoftirqd/023:31:500
1666997317,32cyclictest15-21ksoftirqd/019:53:140
1686997249,17cyclictest6879-21latency_hist19:18:012
1686997246,10cyclictest181rcu_preempt23:03:002
1686997227,13cyclictest0-21swapper/200:22:112
1686997218,27cyclictest0-21swapper/220:33:342
1678997241,22cyclictest15901-21ls21:13:281
1678997221,12cyclictest10840-21apt-get19:28:091
1666997248,7cyclictest181rcu_preempt21:07:540
166699723,47cyclictest23489-21apt-get20:08:140
1666997232,15cyclictest181rcu_preempt19:29:460
1666997214,32cyclictest15-21ksoftirqd/020:33:000
3267027113,32sleep10-21swapper/118:58:161
167899716,29cyclictest8826-21seq21:00:151
1678997154,11cyclictest23789-21ssh23:13:241
1678997151,14cyclictest32746-21sh00:23:151
1666997151,7cyclictest181rcu_preempt21:17:300
1666997112,35cyclictest15-21ksoftirqd/021:03:020
1666997111,34cyclictest15-21ksoftirqd/019:48:190
1666997110,37cyclictest15-21ksoftirqd/022:18:130
79027011,40sleep30-21swapper/318:58:393
1686997039,9cyclictest181rcu_preempt20:18:012
1686997038,11cyclictest181rcu_preempt20:42:152
1678997051,13cyclictest8779-21systemd-run19:22:581
1678997023,15cyclictest22957-21readlink23:12:571
1678997023,11cyclictest0-21swapper/121:29:171
1678997022,10cyclictest0-21swapper/123:38:501
1678997022,10cyclictest0-21swapper/123:38:501
166699705,33cyclictest15-21ksoftirqd/023:43:020
1666997052,12cyclictest6697-21processes20:53:300
1686996942,7cyclictest181rcu_preempt19:48:012
1678996953,9cyclictest0-21swapper/123:55:271
1678996951,13cyclictest0-21swapper/120:23:001
167899692,30cyclictest4291-21grep00:28:351
1678996914,17cyclictest12455-21/usr/sbin/munin19:33:211
1666996932,19cyclictest22395-21kworker/0:1-rcu_gp20:27:590
1666996912,27cyclictest15-21ksoftirqd/020:03:150
84226820,22sleep00-21swapper/018:58:400
167899684,25cyclictest7016-21modprobe21:52:571
1678996824,11cyclictest21849-21ssh21:23:231
1678996824,11cyclictest21849-21ssh21:23:231
1678996823,8cyclictest0-21swapper/119:48:331
1678996823,10cyclictest0-21swapper/123:27:241
1678996820,9cyclictest0-21swapper/122:47:391
1678996820,12cyclictest5277-21timerwakeupswit20:48:321
1678996819,12cyclictest0-21swapper/119:13:241
1678996818,12cyclictest0-21swapper/122:26:161
1678996810,22cyclictest1359-21ssh21:43:101
1678996750,11cyclictest3395-21cstates23:33:591
167899672,26cyclictest23814-21latency_hist20:08:011
1678996721,13cyclictest14700-21sh22:58:231
1678996720,11cyclictest0-21swapper/100:07:431
1678996717,14cyclictest31197-21latency_hist22:32:591
167899671,32cyclictest23981-21fschecks_count00:08:201
1678996712,17cyclictest0-21swapper/120:53:251
1678996645,15cyclictest1-21systemd19:54:481
1678996619,11cyclictest32223-21apt23:28:081
1678996619,11cyclictest32223-21apt23:28:081
1678996521,9cyclictest8727-21apt-get19:23:081
1678996521,9cyclictest8727-21apt-get19:23:081
1678996416,12cyclictest21297-21timerandwakeup19:58:321
167899633,38cyclictest8428-21ssh22:48:331
169399624,41cyclictest0-21swapper/322:03:333
276042533,8sleep30-21swapper/321:33:023
169399532,33cyclictest4255-21chrt21:48:013
169399513,36cyclictest7318-21taskset22:46:493
1693995038,8cyclictest451rcuc/320:46:513
169399502,33cyclictest12596-21chrt19:33:153
169399492,34cyclictest32381-21taskset20:33:213
169399492,32cyclictest18977-21chrt23:05:173
169399483,32cyclictest31482-21taskset23:26:493
169399483,28cyclictest17251-21chrt19:48:013
169399482,32cyclictest11035-21taskset21:58:303
169399473,30cyclictest2208-21chrt19:03:223
169399473,27cyclictest0-21swapper/322:48:293
169399472,31cyclictest27214-21taskset22:25:133
1693994712,23cyclictest0-21swapper/319:23:323
1693994712,23cyclictest0-21swapper/319:23:323
1693994633,9cyclictest451rcuc/323:22:323
1693994633,9cyclictest451rcuc/323:22:323
169399463,32cyclictest5229-21taskset20:48:323
169399463,31cyclictest20332-21taskset23:08:133
169399463,29cyclictest5233-21chrt00:31:103
169399462,30cyclictest7046-21chrt19:18:003
169399462,30cyclictest32103-21chrt00:22:103
169399462,30cyclictest17473-21taskset23:57:533
169399462,29cyclictest17807-21chrt19:48:253
169399453,29cyclictest2035-21taskset22:38:053
169399453,27cyclictest1042-21chrt23:29:043
169399453,27cyclictest1042-21chrt23:29:043
169399453,26cyclictest7044-21chrt20:53:343
169399452,30cyclictest8877-21chrt21:54:453
169399452,27cyclictest9278-21chrt21:03:023
169399444,30cyclictest25958-21taskset23:17:573
169399444,29cyclictest7390-21taskset19:18:123
169399443,28cyclictest27832-21chrt21:33:093
169399443,28cyclictest27832-21chrt21:33:093
169399443,26cyclictest13187-21chrt21:08:333
169399443,26cyclictest13187-21chrt21:08:333
169399443,24cyclictest24335-21chrt00:08:273
1693994431,9cyclictest451rcuc/323:48:343
1693994431,9cyclictest451rcuc/323:48:343
1693994430,9cyclictest451rcuc/321:15:273
1693994430,9cyclictest451rcuc/320:00:013
169399442,28cyclictest19710-21taskset19:53:323
169399434,30cyclictest18884-21taskset23:58:343
169399433,30cyclictest1393-21taskset22:37:003
169399433,29cyclictest5668-21taskset23:37:583
169399433,29cyclictest2086-21taskset00:25:383
169399433,28cyclictest22677-21taskset21:24:093
169399433,28cyclictest22677-21taskset21:24:093
169399433,27cyclictest30770-21chrt21:38:043
169399433,25cyclictest27378-21chrt00:13:263
1693994329,9cyclictest451rcuc/320:19:293
1693994329,10cyclictest451rcuc/322:08:413
1693994329,10cyclictest451rcuc/322:08:413
1693994327,11cyclictest451rcuc/323:43:223
169399432,27cyclictest30425-21taskset20:28:023
169399432,27cyclictest30425-21taskset20:28:023
169399423,30cyclictest29074-21taskset22:28:253
169399423,30cyclictest22904-21chrt20:03:323
169399423,29cyclictest4880-21taskset19:08:373
169399423,29cyclictest19965-21taskset22:13:213
169399423,28cyclictest7039-21chrt23:38:353
169399423,28cyclictest7039-21chrt23:38:353
169399423,28cyclictest13655-21chrt22:57:063
169399423,27cyclictest2819-21chrt20:43:013
169399423,26cyclictest22504-21taskset22:18:033
1693994229,9cyclictest451rcuc/320:15:243
169399413,29cyclictest18417-21taskset21:18:133
169399413,29cyclictest18417-21taskset21:18:133
169399413,29cyclictest15810-21taskset22:59:463
169399413,29cyclictest14089-21chrt19:38:133
169399413,27cyclictest21183-21taskset00:03:203
1693994125,10cyclictest451rcuc/320:10:423
169399412,29cyclictest30157-21taskset20:27:463
169399403,28cyclictest4413-21chrt21:48:133
169399403,27cyclictest9383-21chrt21:03:103
169399393,25cyclictest10850-21chrt19:28:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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