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2026-09-01 - 04:51

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 Tue Sep 01, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1582328584,0sleep00-21swapper/018:42:400
304450460,0irq/25-eth10-21swapper/318:41:123
1594123323,0sleep10-21swapper/118:44:011
1567322622,0sleep20-21swapper/218:40:542
161149976,0cyclictest11749-21fschecks_count22:45:251
8215060,0irq/24-0000:00:4427-21munin-run22:00:132
339960,0migration/3692-21sh00:01:013
339960,0migration/34557-21sh21:38:403
339960,0migration/328758-21sh20:51:013
339960,0migration/32328-21fschecks_count23:20:253
339960,0migration/321053-21sh20:47:063
339960,0migration/319244-21munin-node20:00:243
29715060,0irq/26-eth0-rx-19295-21python20:20:353
149960,0migration/0781-21kthreadcore19:45:310
149960,0migration/05088-21idleruntime-cro21:40:130
149960,0migration/03844-21sh21:58:280
149960,0migration/032449-21sh23:37:300
149960,0migration/027977-21kthreadcore20:05:280
149960,0migration/027465-21sh22:13:020
149960,0migration/019680-21latency_hist22:30:130
149960,0migration/010323-21sh00:10:220
8215050,0irq/24-0000:00:24699-21latency_hist19:40:132
8215050,0irq/24-0000:00:10067-21awk00:10:122
339950,0migration/36664-21df_abs21:00:253
339950,0migration/33838-21latency_hist19:00:133
339950,0migration/33457-21latency19:20:313
339950,0migration/33084-21kthreadcore21:15:303
339950,0migration/325025-21kthreadcore21:10:283
339950,0migration/32161-21irqcore20:35:303
339950,0migration/320912-21kthreadcore18:45:313
339950,0migration/320878-21irqcore22:30:283
339950,0migration/32034-21sh20:55:303
339950,0migration/317226-21munin-node19:30:353
339950,0migration/315457-21munin-node23:25:323
339950,0migration/315286-21munin-node21:05:283
339950,0migration/315028-21kthreadcore22:45:293
339950,0migration/314631-21kthreadcore21:45:303
339950,0migration/314139-21kthreadcore22:25:293
339950,0migration/314131-21taskset20:43:153
339950,0migration/311914-21kthreadcore23:05:293
339950,0migration/311163-21munin-node21:40:363
339950,0migration/310122-21diskmemload23:48:083
29725050,0irq/27-eth0-tx-4690-21munin-node22:00:282
29725050,0irq/27-eth0-tx-3348-21hwlatdetect23:00:262
29725050,0irq/27-eth0-tx-31433-21irqcore21:15:282
29725050,0irq/27-eth0-tx-31049-21kthreadcore21:35:282
29725050,0irq/27-eth0-tx-30496-21munin-node20:55:272
29725050,0irq/27-eth0-tx-22484-21munin-node21:10:312
29725050,0irq/27-eth0-tx-19155-21munin-node22:50:262
29725050,0irq/27-eth0-tx-13882-21tr23:25:292
29725050,0irq/27-eth0-tx-11915-21ssh22:25:212
29725050,0irq/27-eth0-tx-11900-21ssh21:41:482
29725050,0irq/27-eth0-tx-0-21swapper/223:57:032
29725050,0irq/27-eth0-tx-0-21swapper/223:49:282
29725050,0irq/27-eth0-tx-0-21swapper/223:42:072
29725050,0irq/27-eth0-tx-0-21swapper/222:58:522
29725050,0irq/27-eth0-tx-0-21swapper/221:50:312
29725050,0irq/27-eth0-tx-0-21swapper/019:29:510
29715050,0irq/26-eth0-rx-6406-21diskstats21:20:253
29715050,0irq/26-eth0-rx-4222-21if_err_eth1.322:40:283
29715050,0irq/26-eth0-rx-30925-21kthreadcore23:15:303
29715050,0irq/26-eth0-rx-24495-21sh23:32:283
29715050,0irq/26-eth0-rx-21375-21if_err_eth022:10:283
29715050,0irq/26-eth0-rx-19500-21if_eth1.323:10:283
29715050,0irq/26-eth0-rx-16965-21cut22:05:313
29715050,0irq/26-eth0-rx-16279-21cut21:25:303
29715050,0irq/26-eth0-rx-16259-21timerwakeupswit00:10:373
29715050,0irq/26-eth0-rx-0-21swapper/323:50:233
29715050,0irq/26-eth0-rx-0-21swapper/323:40:343
29715050,0irq/26-eth0-rx-0-21swapper/322:16:313
29715050,0irq/26-eth0-rx-0-21swapper/321:58:353
29715050,0irq/26-eth0-rx-0-21swapper/321:30:313
29715050,0irq/26-eth0-rx-0-21swapper/300:05:363
259950,0migration/29181-21timerandwakeup22:40:352
259950,0migration/230925-21munin-node18:55:292
259950,0migration/229835-21kthreadcore22:15:282
259950,0migration/229261-21sh20:52:282
259950,0migration/222365-21fschecks_count21:30:272
259950,0migration/220039-21sh22:09:332
259950,0migration/217773-21sh23:30:222
259950,0migration/217122-21kthreadcore20:45:282
259950,0migration/216124-21kthreadcore21:05:302
179950,0migration/127210-21unixbench-2d21:50:361
179950,0migration/124268-21irqrtprio18:50:301
179950,0migration/123733-21munin-node19:35:341
179950,0migration/11898-21sh22:36:501
179950,0migration/112525-21latency_hist22:05:131
161159954,0cyclictest3514-21snmpd00:11:472
161159954,0cyclictest25285-21grep22:30:312
161149955,0cyclictest14320-21diskmemload00:07:521
161149955,0cyclictest0-21swapper/123:43:261
161149955,0cyclictest0-21swapper/123:13:191
161149955,0cyclictest0-21swapper/121:40:471
161149950,0cyclictest0-21swapper/123:49:541
161149950,0cyclictest0-21swapper/123:33:021
161149950,0cyclictest0-21swapper/122:54:431
161149950,0cyclictest0-21swapper/122:15:181
161149950,0cyclictest0-21swapper/100:10:241
161129950,0cyclictest0-21swapper/021:50:440
169950,0watchdog/18733-21if_err_eth020:40:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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