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2026-07-11 - 07:16

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 Sat Jul 11, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3160423624,0sleep10-21swapper/118:45:521
304450350,0irq/25-eth10-21swapper/318:45:333
3180923423,0sleep00-21swapper/018:48:190
3180623026,0sleep20-21swapper/218:48:172
339960,0migration/34659-21sh20:52:373
339960,0migration/321834-21sh22:04:283
339960,0migration/320976-21sh00:03:523
339960,0migration/320584-21sh23:42:213
339960,0migration/311666-21switchtime23:15:323
320429965,0cyclictest12940-21ssh23:38:432
320429960,0cyclictest0-21swapper/222:02:422
320419960,0cyclictest0-21swapper/121:49:411
320419960,0cyclictest0-21swapper/121:15:281
29725060,0irq/27-eth0-tx-20854-21munin-node19:30:310
29715060,0irq/26-eth0-rx-6967-21iostat_ios22:55:263
27160,0ktimersoftd/20-21swapper/221:42:412
259960,0migration/228140-21proc_pri21:05:312
19160,0ktimersoftd/130132-21diskmemload22:39:491
149960,0migration/04326-21sh23:32:110
149960,0migration/022269-21kthreadcore19:05:280
149960,0migration/022039-21sh21:04:480
149960,0migration/011917-21sh23:56:020
149960,0migration/011450-21missed_timers22:35:280
8215050,0irq/24-0000:00:29913-21latency_hist22:50:092
339950,0migration/37048-21kthreadcore23:35:263
339950,0migration/36502-21kthreadcore20:05:273
339950,0migration/36459-21latency_hist21:15:113
339950,0migration/36457-21munin-node00:15:253
339950,0migration/33299-21pmu-power23:10:303
339950,0migration/331527-21munin-node21:10:273
339950,0migration/331224-21kthreadcore20:00:273
339950,0migration/331126-21fschecks_time22:10:233
339950,0migration/329748-21kthreadcore19:10:283
339950,0migration/327929-21kthreadcore20:20:283
339950,0migration/327819-21munin-node19:55:333
339950,0migration/326023-21kthreadcore21:25:263
339950,0migration/325507-21kthreadcore21:45:283
339950,0migration/323538-21irqrtprio22:05:233
339950,0migration/323467-21kthreadcore19:05:283
339950,0migration/321438-21needreboot20:15:283
339950,0migration/31710-21kthreadcore00:10:273
339950,0migration/316843-21kthreadcore23:20:273
339950,0migration/315492-21taskset20:11:003
339950,0migration/31416-21taskset19:39:023
339950,0migration/314155-21latency_hist22:20:093
339950,0migration/313807-21crond22:40:093
339950,0migration/313107-21taskset23:59:263
339950,0migration/312348-21timerandwakeup21:35:323
339950,0migration/312348-21timerandwakeup21:35:323
339950,0migration/310242-21latency_hist20:35:113
320429955,0cyclictest0-21swapper/223:26:062
320429955,0cyclictest0-21swapper/223:22:572
320429955,0cyclictest0-21swapper/221:20:272
320429955,0cyclictest0-21swapper/200:00:282
320429950,0cyclictest0-21swapper/222:15:192
320419955,0cyclictest0-21swapper/123:00:091
320419955,0cyclictest0-21swapper/122:50:231
320419955,0cyclictest0-21swapper/122:30:211
320419955,0cyclictest0-21swapper/122:19:291
320419955,0cyclictest0-21swapper/122:13:101
320419950,0cyclictest0-21swapper/123:11:211
320419950,0cyclictest0-21swapper/121:57:241
320419950,0cyclictest0-21swapper/120:51:211
320409955,0cyclictest0-21swapper/022:19:400
320409953,0cyclictest4454-21kworker/0:122:26:010
320409950,0cyclictest0-21swapper/023:22:530
320409950,0cyclictest0-21swapper/022:45:220
320409950,0cyclictest0-21swapper/019:36:480
29725050,0irq/27-eth0-tx-7036-21sh21:55:242
29725050,0irq/27-eth0-tx-3254-21open_files23:10:292
29725050,0irq/27-eth0-tx-30132-21diskmemload21:19:202
29725050,0irq/27-eth0-tx-19323-21nfs_client23:40:282
29725050,0irq/27-eth0-tx-15184-21munin-node19:50:290
29725050,0irq/27-eth0-tx-0-21swapper/223:31:262
29725050,0irq/27-eth0-tx-0-21swapper/223:00:532
29725050,0irq/27-eth0-tx-0-21swapper/222:57:082
29725050,0irq/27-eth0-tx-0-21swapper/222:34:042
29725050,0irq/27-eth0-tx-0-21swapper/222:10:122
29725050,0irq/27-eth0-tx-0-21swapper/222:05:352
29725050,0irq/27-eth0-tx-0-21swapper/221:40:102
29725050,0irq/27-eth0-tx-0-21swapper/221:40:102
29725050,0irq/27-eth0-tx-0-21swapper/221:00:202
29725050,0irq/27-eth0-tx-0-21swapper/220:52:182
29725050,0irq/27-eth0-tx-0-21swapper/020:50:200
29725050,0irq/27-eth0-tx-0-21swapper/020:45:310
29725050,0irq/27-eth0-tx-0-21swapper/020:15:280
29725050,0irq/27-eth0-tx-0-21swapper/020:10:210
29715050,0irq/26-eth0-rx-5150-21kthreadcore19:15:283
29715050,0irq/26-eth0-rx-32551-21kthreadcore20:25:283
29715050,0irq/26-eth0-rx-31132-21hwlatdetect22:30:243
29715050,0irq/26-eth0-rx-29056-21ssh21:06:503
29715050,0irq/26-eth0-rx-2841-21cut19:40:263
29715050,0irq/26-eth0-rx-22821-21if_eth123:25:243
29715050,0irq/26-eth0-rx-22803-21fschecks_time22:45:233
29715050,0irq/26-eth0-rx-22282-21ssh21:24:473
29715050,0irq/26-eth0-rx-2116-21cut23:30:273
29715050,0irq/26-eth0-rx-20785-21sh22:42:043
29715050,0irq/26-eth0-rx-19899-21proc_pri21:00:303
29715050,0irq/26-eth0-rx-1782-21kthreadcore23:50:253
29715050,0irq/26-eth0-rx-12489-21munin-node18:55:333
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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