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2026-05-17 - 22:45

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 Sun May 17, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
960324738,0sleep10-21swapper/106:55:101
955323727,0sleep30-21swapper/306:54:323
932923425,0sleep20-21swapper/206:51:592
941823322,0sleep00-21swapper/006:53:010
96979960,0cyclictest0-21swapper/112:18:281
339960,0migration/34130-21timerandwakeup12:10:453
339960,0migration/323829-21sh09:24:233
339960,0migration/322552-21sh10:22:343
29725060,0irq/27-eth0-tx-30793-21munin-node07:35:350
29715060,0irq/26-eth0-rx-7916-21perl10:55:383
29715060,0irq/26-eth0-rx-20466-21yum12:20:453
259960,0migration/2415-21kthreadcore11:10:392
96989955,0cyclictest23201-21ssh09:22:302
96989955,0cyclictest0-21swapper/212:11:302
96989955,0cyclictest0-21swapper/211:52:262
96989955,0cyclictest0-21swapper/210:21:562
96989954,0cyclictest3514-21snmpd07:00:282
96989950,0cyclictest0-21swapper/211:47:512
96989950,0cyclictest0-21swapper/210:48:252
96989950,0cyclictest0-21swapper/209:44:532
96989950,0cyclictest0-21swapper/209:01:132
96979955,0cyclictest0-21swapper/110:32:411
96979955,0cyclictest0-21swapper/109:54:501
96979950,0cyclictest0-21swapper/111:42:311
96979950,0cyclictest0-21swapper/110:09:581
96969955,0cyclictest0-21swapper/011:51:230
96969954,0cyclictest7483-21awk11:55:370
96969950,0cyclictest0-21swapper/012:11:150
96969950,0cyclictest0-21swapper/011:08:490
96969950,0cyclictest0-21swapper/010:56:220
96969950,0cyclictest0-21swapper/010:46:540
4150,0ktimersoftd/00-21swapper/010:08:450
339950,0migration/38858-21munin-node09:55:383
339950,0migration/37632-21taskset09:34:383
339950,0migration/37118-21switchtime08:50:453
339950,0migration/3580-21if_eth110:10:373
339950,0migration/33953-21kthreadcore11:30:393
339950,0migration/332149-21irqrtprio11:50:373
339950,0migration/329968-21aten_r1power_po07:10:343
339950,0migration/329326-21taskset11:46:413
339950,0migration/326929-21kthreadcore10:05:393
339950,0migration/325445-21munin-node07:55:363
339950,0migration/321114-21taskset10:40:423
339950,0migration/321097-21fschecks_time08:40:363
339950,0migration/317938-21taskset07:47:053
339950,0migration/313002-21cpuspeed_turbos08:10:353
339950,0migration/311550-21kthreadcore09:35:403
339950,0migration/310382-21kthreadcore10:15:383
29725050,0irq/27-eth0-tx-8059-21latency_hist09:35:232
29725050,0irq/27-eth0-tx-3514-21snmpd07:17:220
29725050,0irq/27-eth0-tx-19419-21munin-node08:15:330
29725050,0irq/27-eth0-tx-13721-21munin-node08:35:440
29715050,0irq/26-eth0-rx-8200-21hostname08:55:333
29715050,0irq/26-eth0-rx-7794-21irqcore11:35:383
29715050,0irq/26-eth0-rx-6514-21ssh10:54:073
29715050,0irq/26-eth0-rx-5420-21df07:40:343
29715050,0irq/26-eth0-rx-4824-21ssh10:30:403
29715050,0irq/26-eth0-rx-3656-21cut09:50:383
29715050,0irq/26-eth0-rx-32317-21iostat11:10:383
29715050,0irq/26-eth0-rx-30347-21uptime09:45:483
29715050,0irq/26-eth0-rx-24682-21if_err_eth1.210:25:373
29715050,0irq/26-eth0-rx-23092-21grep12:05:353
29715050,0irq/26-eth0-rx-21253-21ssh11:41:403
29715050,0irq/26-eth0-rx-0-21swapper/311:15:443
29715050,0irq/26-eth0-rx-0-21swapper/311:05:363
29715050,0irq/26-eth0-rx-0-21swapper/310:00:393
29715050,0irq/26-eth0-rx-0-21swapper/309:41:563
29715050,0irq/26-eth0-rx-0-21swapper/309:25:433
29715050,0irq/26-eth0-rx-0-21swapper/309:15:013
29715050,0irq/26-eth0-rx-0-21swapper/309:03:523
29715050,0irq/26-eth0-rx-0-21swapper/308:34:103
29715050,0irq/26-eth0-rx-0-21swapper/308:25:383
29715050,0irq/26-eth0-rx-0-21swapper/307:20:343
259950,0migration/28724-21gltestperf09:55:372
249950,0watchdog/20-21swapper/210:15:322
179950,0migration/132285-21latency08:45:421
179950,0migration/132104-21taskset08:21:011
179950,0migration/127346-21kthreadcore07:30:401
179950,0migration/124054-21fschecks_count10:45:351
179950,0migration/116816-21kthreadcore11:00:391
179950,0migration/116455-21kthreadcore07:45:431
179950,0migration/116133-21latency_hist09:40:231
179950,0migration/114419-21kthreadcore08:10:391
179950,0migration/113561-21sh09:55:431
179950,0migration/110540-21munin-node07:40:411
149950,0migration/04294-21kthreadcore10:10:400
149950,0migration/031532-21sh09:08:270
149950,0migration/031321-21aten_r1power_cu11:10:330
149950,0migration/02986-21kthreadcore09:50:380
149950,0migration/024356-21irqcore07:05:380
149950,0migration/022377-21timerandwakeup09:20:450
149950,0migration/021633-21sh11:22:120
149950,0migration/021357-21munin-node08:40:380
149950,0migration/01810-21kthreadcore10:50:390
149950,0migration/017759-21kthreadcore10:20:380
149950,0migration/016047-21latency_hist09:40:230
149950,0migration/015685-21timerandwakeup06:55:460
149950,0migration/013353-21fschecks_time08:10:360
149950,0migration/013188-21sh11:36:300
149950,0migration/011367-21kthreadcore08:55:380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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