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2026-04-06 - 19:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Mon Apr 06, 2026 12:45:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1245739998828,12cyclictest1315284-21ssh11:36:360
1245739998434,5cyclictest16850irq/134-800000011:45:000
1245739998428,15cyclictest1296222-21ssh10:52:270
1245739998428,15cyclictest1296222-21ssh10:52:260
1245739998427,12cyclictest1269993-21ssh09:51:260
1245739998028,12cyclictest1276331-21ssh10:06:030
1245739998025,14cyclictest1324489-21ssh11:57:590
124573999742,8cyclictest1-21systemd11:00:010
1245739997326,13cyclictest1289205-21ssh10:35:550
1245747997125,41cyclictest1332385-21sh12:16:061
1245747996927,38cyclictest1261356-21sh09:31:421
1245739996933,27cyclictest16950irq/224-800000012:05:020
124573999692,42cyclictest1311875-21ssh11:28:450
1245739996924,11cyclictest1331781-21ssh12:15:010
1245747996729,34cyclictest1289992-21sh10:37:581
1245747996725,36cyclictest1308651-21sh11:20:591
1245747996725,36cyclictest1308651-21sh11:20:591
1245739996719,12cyclictest1322268-21ssh11:52:470
1245747996626,36cyclictest1326625-21sh12:02:571
124574799662,21cyclictest1300596-21ssh11:02:291
124574799662,21cyclictest1300596-21ssh11:02:291
124575199659,40cyclictest1310396-21ssh11:25:032
124575199659,40cyclictest1310396-21ssh11:25:022
1245747996526,35cyclictest1330835-21sh12:12:421
1245747996524,37cyclictest1268892-21sh09:49:161
1245739996524,15cyclictest1283564-21rm10:22:580
1245739996427,14cyclictest1305512-21ssh11:14:050
1245747996324,35cyclictest23-21ksoftirqd/109:36:551
124574799632,17cyclictest1251943-21systemd-run09:10:011
124574799632,14cyclictest1324616-21ssh11:58:181
1245747996321,38cyclictest23-21ksoftirqd/109:12:081
124574799631,9cyclictest1340207-21ssh12:34:311
1245739996328,12cyclictest1261383-21ssh09:31:460
1245739996325,14cyclictest1252975-21rm09:12:150
124574799622,9cyclictest1306889-21ssh11:17:051
124574799621,9cyclictest1295486-21ssh10:50:321
124574799621,9cyclictest1295486-21ssh10:50:321
124574799621,7cyclictest1329301-21ssh12:09:161
124574799621,7cyclictest1255517-21ssh09:18:121
124574799621,10cyclictest1303489-21ssh11:09:281
1245739996227,14cyclictest1285368-21ssh10:27:050
124574799612,9cyclictest1305540-21ssh11:14:181
124574799612,7cyclictest1298923-21ssh10:58:471
124574799612,20cyclictest1270510-21ssh09:52:501
124574799612,14cyclictest1258888-21sshd09:25:421
124574799611,9cyclictest1336611-21ssh12:25:501
124574799611,8cyclictest1313178-21ssh11:31:381
124574799611,8cyclictest1266524-21ssh09:43:421
124574799611,12cyclictest1278742-21ssh10:11:461
124574799611,10cyclictest1316109-21ssh11:38:441
124574799611,10cyclictest1282880-21ssh10:21:111
124573999616,36cyclictest1268482-21kworker/u8:110:30:030
1245739996129,10cyclictest1263324-21ssh09:36:090
1245747996023,33cyclictest23-21ksoftirqd/110:15:351
124574799601,8cyclictest1320449-21ssh11:48:381
124574799601,8cyclictest1284692-21ssh10:25:241
124574799601,8cyclictest1271896-21ssh09:55:511
124574799601,8cyclictest1256663-21ssh09:20:391
124574799601,8cyclictest1256663-21ssh09:20:381
124574799601,13cyclictest364-21snmpd11:42:231
124573999607,31cyclictest151rcuc/007:25:020
124575199593,8cyclictest131rcu_preempt08:19:452
124574799591,8cyclictest1341961-21ssh12:38:381
124574799591,8cyclictest1335778-21ssh12:24:141
124574799591,8cyclictest1294244-21ssh10:47:481
124574799591,8cyclictest1248761-21sshd08:05:091
124574799591,13cyclictest1251711-21cat09:05:021
124574799591,10cyclictest1291343-21ssh10:40:501
1245739995935,19cyclictest16850irq/134-800000010:43:580
124574799582,14cyclictest1277733-21ssh10:09:441
124574799582,12cyclictest1249321-21munin-run08:20:001
124574799582,10cyclictest364-21snmpd08:47:511
124574799581,9cyclictest3467602-21systemd-journal10:34:271
124574799572,6cyclictest1247524-21munin-run07:45:021
124574799571,7cyclictest3467602-21systemd-journal11:54:471
124574799571,16cyclictest1273963-21ssh10:00:291
1245739995720,32cyclictest1252110-21latency_hist09:10:030
1245751995647,6cyclictest1312352-21kworker/2:112:39:282
1245747995631,19cyclictest309-21in:imuxsock08:35:001
124574799562,7cyclictest1248016-21munin-run07:55:001
124574799561,9cyclictest1249821-21sshd08:28:091
124574799561,6cyclictest1249607-21munin-run08:25:011
124574799561,13cyclictest1311298-21ssh11:27:211
124574799551,9cyclictest1246699-21sshd07:26:091
1245756995440,10cyclictest1-21systemd11:10:013
1245751995435,14cyclictest3467602-21systemd-journal12:10:032
124574799547,40cyclictest1246193-21modprobe07:20:001
124574799543,5cyclictest364-21snmpd08:37:491
124574799543,5cyclictest364-21snmpd08:37:481
1245747995428,23cyclictest1245935-21latency_hist07:15:031
124574799542,6cyclictest1249052-21munin-run08:15:011
124574799541,15cyclictest364-21snmpd08:58:271
1245739995427,12cyclictest1332974-21ssh12:17:290
1245739995413,15cyclictest12-21ksoftirqd/010:20:020
1245756995336,12cyclictest3467602-21systemd-journal08:40:013
1245756995336,12cyclictest3467602-21systemd-journal08:40:003
1245751995345,5cyclictest1236510-21kworker/2:210:01:482
1245751995344,6cyclictest1236510-21kworker/2:209:37:522
1245751995344,5cyclictest1251689-21kworker/2:311:56:472
1245751995344,5cyclictest1251689-21kworker/2:310:22:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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