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2026-06-26 - 03:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot2s.osadl.org (updated Fri Jun 26, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450350,0irq/25-eth10-21swapper/318:47:133
1682223322,0sleep00-21swapper/018:49:340
1674723324,0sleep20-21swapper/218:48:442
1677023127,0sleep10-21swapper/118:48:591
4160,0ktimersoftd/00-21swapper/020:56:400
339960,0migration/38345-21munin-node20:21:483
339960,0migration/331401-21sh21:19:323
339960,0migration/331390-21sh23:00:593
339960,0migration/330734-21sh23:40:453
339960,0migration/321201-21munin-node23:11:543
339960,0migration/314489-21sh22:08:053
339960,0migration/313947-21sh23:07:363
339960,0migration/313908-21sh22:47:013
339960,0migration/313785-21sh00:09:483
29725060,0irq/27-eth0-tx-7802-21munin-node20:21:570
29725060,0irq/27-eth0-tx-26794-21munin-node20:11:490
29715060,0irq/26-eth0-rx-31738-21diskstats23:41:533
27160,0ktimersoftd/20-21swapper/220:56:402
170679960,0cyclictest0-21swapper/223:09:302
170679960,0cyclictest0-21swapper/221:56:592
149960,0migration/0995-21kthreadcore00:01:540
149960,0migration/07016-21sh21:05:310
149960,0migration/01782-21sh20:41:360
35150,0ktimersoftd/30-21swapper/300:00:543
339950,0migration/37912-21kthreadcore19:06:533
339950,0migration/37900-21aten_r1power_fr22:26:463
339950,0migration/3729-21munin-node22:01:533
339950,0migration/36864-21aten_r1power_cu19:56:473
339950,0migration/332012-21latency_hist22:01:363
339950,0migration/331431-21munin-node00:01:503
339950,0migration/328621-21kthreadcore19:46:533
339950,0migration/326009-21kthreadcore18:56:533
339950,0migration/325344-21taskset19:43:213
339950,0migration/324526-21fschecks_time22:36:513
339950,0migration/324026-21timerwakeupswit19:17:003
339950,0migration/321693-21munin-node21:51:553
339950,0migration/321620-21runrttasks20:52:053
339950,0migration/321165-21munin-node20:06:523
339950,0migration/315248-21hwlatdetect20:26:513
339950,0migration/314125-21sh21:07:323
339950,0migration/31397-21kthreadcore23:21:523
29725050,0irq/27-eth0-tx-8093-21df21:06:482
29725050,0irq/27-eth0-tx-800-21iostat_ios22:01:532
29725050,0irq/27-eth0-tx-30558-21munin-node19:01:550
29725050,0irq/27-eth0-tx-23837-21munin-node22:56:492
29725050,0irq/27-eth0-tx-23535-21ssh22:15:592
29725050,0irq/27-eth0-tx-2309-21grep23:01:532
29725050,0irq/27-eth0-tx-16809-21ssh22:31:532
29725050,0irq/27-eth0-tx-10127-21kthreadcore21:46:552
29725050,0irq/27-eth0-tx-0-21swapper/222:41:492
29725050,0irq/27-eth0-tx-0-21swapper/221:52:282
29725050,0irq/27-eth0-tx-0-21swapper/200:18:022
29725050,0irq/27-eth0-tx-0-21swapper/200:08:212
29725050,0irq/27-eth0-tx-0-21swapper/020:51:520
29725050,0irq/27-eth0-tx-0-21swapper/019:26:570
29715050,0irq/26-eth0-rx-9953-21kthreadcore21:26:533
29715050,0irq/26-eth0-rx-4631-21cut21:01:543
29715050,0irq/26-eth0-rx-31554-40yum-updatesd-he21:40:113
29715050,0irq/26-eth0-rx-29273-21kthreadcore22:16:543
29715050,0irq/26-eth0-rx-23623-21ssh23:16:433
29715050,0irq/26-eth0-rx-2340-21tr23:01:533
29715050,0irq/26-eth0-rx-2273-21cut21:21:523
29715050,0irq/26-eth0-rx-18277-21kthreadcore23:31:523
29715050,0irq/26-eth0-rx-16034-21telnet22:11:473
29715050,0irq/26-eth0-rx-14636-21kthreadcore19:11:523
29715050,0irq/26-eth0-rx-13407-21uptime23:27:003
29715050,0irq/26-eth0-rx-0-21swapper/323:47:003
29715050,0irq/26-eth0-rx-0-21swapper/322:51:493
29715050,0irq/26-eth0-rx-0-21swapper/322:43:083
29715050,0irq/26-eth0-rx-0-21swapper/322:32:313
29715050,0irq/26-eth0-rx-0-21swapper/322:22:133
29715050,0irq/26-eth0-rx-0-21swapper/321:11:533
29715050,0irq/26-eth0-rx-0-21swapper/319:21:473
29715050,0irq/26-eth0-rx-0-21swapper/300:16:533
259950,0migration/27728-21latency_hist20:21:362
259950,0migration/26848-21sh23:26:012
259950,0migration/26538-21latency_hist00:06:362
259950,0migration/225416-21kthreadcore22:36:552
259950,0migration/224647-21gltestperf18:56:502
259950,0migration/223515-21sh21:35:082
259950,0migration/215225-21sh22:10:122
259950,0migration/215218-21latency_hist23:31:362
259950,0migration/214189-21sh23:50:002
249950,0watchdog/221587-21sensors_temp22:51:582
19150,0ktimersoftd/10-21swapper/120:56:401
170679950,0cyclictest0-21swapper/223:46:332
170679950,0cyclictest0-21swapper/223:15:292
170679950,0cyclictest0-21swapper/220:52:012
170669955,0cyclictest0-21swapper/123:48:021
170669955,0cyclictest0-21swapper/123:10:401
170669955,0cyclictest0-21swapper/122:52:231
170669955,0cyclictest0-21swapper/121:51:511
170669955,0cyclictest0-21swapper/120:54:371
170669955,0cyclictest0-21swapper/119:11:401
170669954,0cyclictest3514-21snmpd21:32:411
170669950,0cyclictest0-21swapper/123:39:411
170669950,0cyclictest0-21swapper/122:49:231
170669950,0cyclictest0-21swapper/122:40:051
170669950,0cyclictest0-21swapper/121:23:001
170669950,0cyclictest0-21swapper/121:14:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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