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2026-08-10 - 22:21

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 Mon Aug 10, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2803425857,0sleep00-21swapper/006:45:000
2803525655,0sleep10-21swapper/106:45:011
304450530,0irq/25-eth10-21swapper/306:46:273
2789723726,0sleep20-21swapper/206:43:222
283059976,0cyclictest8556-21users08:52:420
339960,0migration/36742-21sh10:35:033
339960,0migration/323175-21sh10:24:543
339960,0migration/322333-21missed_timers10:02:343
29725060,0irq/27-eth0-tx-3807-21munin-node07:17:310
29715060,0irq/26-eth0-rx-7601-21kthreadcore11:57:333
29715060,0irq/26-eth0-rx-32364-21kthreadcore12:12:313
29715060,0irq/26-eth0-rx-31928-21diskstats08:02:283
283089960,0cyclictest0-21swapper/208:55:102
283059965,0cyclictest17923-21kworker/0:211:33:070
283059960,0cyclictest0-21swapper/011:37:370
283059960,0cyclictest0-21swapper/009:11:180
149960,0migration/028942-21fschecks_count06:47:280
8215050,0irq/24-0000:00:8484-21kthreadcore11:57:332
339950,0migration/38820-21kthreadcore07:17:333
339950,0migration/37328-21kthreadcore08:07:333
339950,0migration/36338-21taskset08:28:433
339950,0migration/34791-21kthreadcore08:52:353
339950,0migration/33386-21taskset07:15:333
339950,0migration/331606-21kthreadcore11:52:293
339950,0migration/331301-21switchtime09:47:393
339950,0migration/329592-21kthreadcore09:07:343
339950,0migration/326178-21kthreadcore11:07:333
339950,0migration/324406-21kthreadcore11:27:333
339950,0migration/324063-21irqrtprio07:07:313
339950,0migration/321917-21aten2.4-expect11:47:273
339950,0migration/321285-21pmu-power10:42:363
339950,0migration/320803-21sh11:23:123
339950,0migration/318710-21fschecks_count07:52:293
339950,0migration/316782-21taskset09:18:393
339950,0migration/315112-21kthreadcore07:22:323
339950,0migration/313124-21kthreadcore09:37:343
339950,0migration/31162-21kthreadcore10:52:323
339950,0migration/310915-21taskset07:42:473
29725050,0irq/27-eth0-tx-8415-21fschecks_time10:37:282
29725050,0irq/27-eth0-tx-8183-21swap09:12:372
29725050,0irq/27-eth0-tx-3514-21snmpd11:46:562
29725050,0irq/27-eth0-tx-31981-21iostat11:12:322
29725050,0irq/27-eth0-tx-25880-21munin-node08:22:390
29725050,0irq/27-eth0-tx-23844-21munin-node07:32:300
29725050,0irq/27-eth0-tx-22382-21ssh11:27:212
29725050,0irq/27-eth0-tx-18638-21munin-node09:02:312
29725050,0irq/27-eth0-tx-17320-21ssh09:42:132
29725050,0irq/27-eth0-tx-12678-21ssh11:39:252
29725050,0irq/27-eth0-tx-11548-21munin-node07:47:370
29725050,0irq/27-eth0-tx-0-21swapper/212:11:182
29725050,0irq/27-eth0-tx-0-21swapper/211:22:202
29725050,0irq/27-eth0-tx-0-21swapper/210:50:392
29725050,0irq/27-eth0-tx-0-21swapper/209:27:042
29715050,0irq/26-eth0-rx-6559-21runrttasks09:25:313
29715050,0irq/26-eth0-rx-6453-21grep11:37:303
29715050,0irq/26-eth0-rx-3527-21kthreadcore10:12:333
29715050,0irq/26-eth0-rx-31511-21fschecks_time11:12:293
29715050,0irq/26-eth0-rx-28775-21grep06:47:273
29715050,0irq/26-eth0-rx-2841-21aten_r1power_en06:52:273
29715050,0irq/26-eth0-rx-26880-21port_sshpriv12:07:373
29715050,0irq/26-eth0-rx-25447-21kthreadcore10:47:313
29715050,0irq/26-eth0-rx-21613-21kthreadcore08:42:313
29715050,0irq/26-eth0-rx-1703-21ssh09:32:283
29715050,0irq/26-eth0-rx-15497-21cat11:42:313
29715050,0irq/26-eth0-rx-11716-21irqrtprio08:57:323
29715050,0irq/26-eth0-rx-0-21swapper/311:17:333
29715050,0irq/26-eth0-rx-0-21swapper/311:02:363
29715050,0irq/26-eth0-rx-0-21swapper/311:02:363
29715050,0irq/26-eth0-rx-0-21swapper/311:00:533
29715050,0irq/26-eth0-rx-0-21swapper/310:37:323
29715050,0irq/26-eth0-rx-0-21swapper/309:57:363
29715050,0irq/26-eth0-rx-0-21swapper/309:57:003
29715050,0irq/26-eth0-rx-0-21swapper/309:30:203
29715050,0irq/26-eth0-rx-0-21swapper/309:12:193
29715050,0irq/26-eth0-rx-0-21swapper/308:37:283
283089954,0cyclictest32306-21crond08:27:162
283089953,0cyclictest23794-21awk07:07:302
283089950,0cyclictest0-21swapper/210:43:572
283079955,0cyclictest0-21swapper/111:51:531
283079955,0cyclictest0-21swapper/111:45:441
283079950,0cyclictest0-21swapper/112:09:421
283079950,0cyclictest0-21swapper/110:52:551
283079950,0cyclictest0-21swapper/110:26:071
283079950,0cyclictest0-21swapper/109:58:501
283059955,0cyclictest26662-21diskmemload10:17:410
283059955,0cyclictest17923-21kworker/0:212:11:500
283059955,0cyclictest17923-21kworker/0:212:02:200
283059955,0cyclictest17923-21kworker/0:211:57:300
283059955,0cyclictest17923-21kworker/0:211:48:440
283059955,0cyclictest17923-21kworker/0:211:42:310
283059955,0cyclictest17923-21kworker/0:211:27:170
283059955,0cyclictest17923-21kworker/0:211:22:510
283059955,0cyclictest17923-21kworker/0:211:17:230
283059955,0cyclictest17923-21kworker/0:211:13:490
283059955,0cyclictest17923-21kworker/0:211:07:310
283059955,0cyclictest17923-21kworker/0:211:02:270
283059955,0cyclictest17923-21kworker/0:211:02:270
283059955,0cyclictest17923-21kworker/0:210:47:270
283059955,0cyclictest17923-21kworker/0:210:42:270
283059955,0cyclictest17923-21kworker/0:210:36:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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