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2026-05-29 - 19:03

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 50 highest latencies:
System rack1slot2s.osadl.org (updated Fri May 29, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450550,0irq/25-eth10-21swapper/306:50:053
1402323927,0sleep20-21swapper/206:51:072
1394123724,0sleep00-21swapper/006:50:090
1427123525,0sleep10-21swapper/106:53:581
35160,0ktimersoftd/30-21swapper/309:49:063
339960,0migration/36793-21sh12:22:433
339960,0migration/323139-21sh09:12:493
339960,0migration/316427-21sh09:26:243
339960,0migration/315175-21sh11:06:073
29725060,0irq/27-eth0-tx-10040-21munin-node08:44:250
29715060,0irq/26-eth0-rx-31169-21seq11:16:013
29715060,0irq/26-eth0-rx-16002-21munin-run11:29:133
29715060,0irq/26-eth0-rx-0-21swapper/312:03:393
27160,0ktimersoftd/20-21swapper/210:57:032
143649960,0cyclictest0-21swapper/209:36:582
143649960,0cyclictest0-21swapper/209:18:312
149960,0migration/030823-21timerwakeupswit10:54:350
149960,0migration/016002-21munin-run11:29:130
339950,0migration/3885-21kthreadcore07:14:313
339950,0migration/3826-21munin-node07:59:253
339950,0migration/33733-21kthreadcore09:39:303
339950,0migration/326716-21munin-node09:54:303
339950,0migration/325768-21kthreadcore11:34:303
339950,0migration/321777-21latency_hist07:04:143
339950,0migration/319756-21kthreadcore06:54:293
339950,0migration/318529-21taskset07:43:013
339950,0migration/315841-21fschecks_time08:19:263
339950,0migration/315013-21munin-node10:04:323
339950,0migration/314889-21munin-node10:24:343
29725050,0irq/27-eth0-tx-8217-21munin-node11:24:362
29725050,0irq/27-eth0-tx-7719-21ssh10:20:532
29725050,0irq/27-eth0-tx-31258-21ssh11:37:062
29725050,0irq/27-eth0-tx-23255-21awk09:29:372
29725050,0irq/27-eth0-tx-17593-21munin-node09:49:292
29725050,0irq/27-eth0-tx-16264-21munin-node11:29:272
29725050,0irq/27-eth0-tx-15743-21sed09:24:372
29725050,0irq/27-eth0-tx-15555-21sed12:09:132
29725050,0irq/27-eth0-tx-11936-21kthreadcore11:44:302
29725050,0irq/27-eth0-tx-0-21swapper/212:21:132
29725050,0irq/27-eth0-tx-0-21swapper/210:49:282
29725050,0irq/27-eth0-tx-0-21swapper/210:45:322
29725050,0irq/27-eth0-tx-0-21swapper/210:35:302
29725050,0irq/27-eth0-tx-0-21swapper/210:30:542
29725050,0irq/27-eth0-tx-0-21swapper/008:49:280
29725050,0irq/27-eth0-tx-0-21swapper/007:04:180
29715050,0irq/26-eth0-rx-8446-21if_eth1.309:04:283
29715050,0irq/26-eth0-rx-556-21fschecks_count11:19:263
29715050,0irq/26-eth0-rx-31488-21ssh08:59:193
29715050,0irq/26-eth0-rx-27088-21kthreadcore10:54:283
29715050,0irq/26-eth0-rx-24000-21aten_r1power_fr09:14:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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