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2026-04-10 - 21:08

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 Fri Apr 10, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450560,0irq/25-eth10-21swapper/306:57:053
3244224132,0sleep10-21swapper/106:57:231
3184723531,0sleep00-21swapper/006:54:170
3233723127,0sleep20-21swapper/206:56:072
29725070,0irq/27-eth0-tx-13850-21munin-node07:09:070
339960,0migration/36598-21munin-node10:24:073
339960,0migration/34534-21sh11:03:013
339960,0migration/329665-21sh09:57:433
339960,0migration/327965-21sh11:57:503
339960,0migration/319465-21sh11:51:253
339960,0migration/313896-21runrttasks09:48:263
326399960,0cyclictest0-21swapper/208:44:132
326389966,0cyclictest0-21swapper/109:16:501
326389960,0cyclictest0-21swapper/108:49:051
29715060,0irq/26-eth0-rx-0-21swapper/309:14:153
249960,0watchdog/27538-21kthreadcore11:44:062
179960,0migration/120651-21unixbench-2d09:29:141
149960,0migration/030086-21fschecks_time10:59:050
8215050,0irq/24-0000:00:8900-21munin-run07:53:522
8215050,0irq/24-0000:00:21730-21latency_hist10:13:522
8215050,0irq/24-0000:00:0-21swapper/212:03:522
339950,0migration/37991-21kernelversion09:24:083
339950,0migration/34713-21kthreadcore07:49:093
339950,0migration/34635-21timerwakeupswit09:19:153
339950,0migration/34052-21munin-node09:39:123
339950,0migration/332040-21kthreadcore08:34:083
339950,0migration/331078-21taskset08:59:023
339950,0migration/329926-21rt-features08:54:123
339950,0migration/329839-21hddtemp_smartct08:09:063
339950,0migration/329054-21cpu11:39:023
339950,0migration/323539-21irqcore08:04:093
339950,0migration/323035-21df_abs09:34:033
339950,0migration/321499-21fschecks_time11:34:043
339950,0migration/321345-21taskset09:51:453
339950,0migration/318669-21kthreadcore07:34:083
339950,0migration/317071-21kthreadcore09:09:073
339950,0migration/316158-21kthreadcore08:44:093
339950,0migration/314446-21kthreadcore12:09:073
339950,0migration/313721-21aten_r1power_cu10:29:023
339950,0migration/313507-21taskset07:07:453
339950,0migration/310483-21munin-node08:19:043
326399955,0cyclictest0-21swapper/209:18:262
326399950,0cyclictest0-21swapper/209:33:532
326389955,0cyclictest0-21swapper/111:44:241
326389955,0cyclictest0-21swapper/110:05:141
326389950,0cyclictest0-21swapper/111:30:041
326389950,0cyclictest0-21swapper/110:56:101
326389950,0cyclictest0-21swapper/110:12:011
326389950,0cyclictest0-21swapper/109:52:471
326389950,0cyclictest0-21swapper/108:58:521
326379955,0cyclictest0-21swapper/012:22:020
326379955,0cyclictest0-21swapper/010:34:120
326379950,0cyclictest0-21swapper/011:35:510
326379950,0cyclictest0-21swapper/011:32:040
326379950,0cyclictest0-21swapper/010:25:030
29725050,0irq/27-eth0-tx-386-21munin-node06:59:040
29725050,0irq/27-eth0-tx-30980-21munin-node08:59:132
29725050,0irq/27-eth0-tx-29710-21munin-node10:39:142
29725050,0irq/27-eth0-tx-29142-21munin-node11:19:062
29725050,0irq/27-eth0-tx-20858-21munin-node11:34:042
29725050,0irq/27-eth0-tx-19725-21ssh10:49:392
29725050,0irq/27-eth0-tx-12303-21munin-node12:09:132
29725050,0irq/27-eth0-tx-11625-21ssh10:44:242
29725050,0irq/27-eth0-tx-0-21swapper/008:43:200
29715050,0irq/26-eth0-rx-9057-21ssh10:44:103
29715050,0irq/26-eth0-rx-6604-21tr11:24:083
29715050,0irq/26-eth0-rx-6559-21runrttasks10:40:263
29715050,0irq/26-eth0-rx-30292-21irqcore11:19:063
29715050,0irq/26-eth0-rx-24582-21cut10:14:093
29715050,0irq/26-eth0-rx-20930-21latency_hist11:13:523
29715050,0irq/26-eth0-rx-20032-21grep10:09:143
29715050,0irq/26-eth0-rx-14380-21ssh09:08:393
29715050,0irq/26-eth0-rx-1397-21awk12:19:103
29715050,0irq/26-eth0-rx-0-21swapper/312:14:053
29715050,0irq/26-eth0-rx-0-21swapper/312:04:153
29715050,0irq/26-eth0-rx-0-21swapper/311:44:003
29715050,0irq/26-eth0-rx-0-21swapper/311:31:423
29715050,0irq/26-eth0-rx-0-21swapper/311:04:123
29715050,0irq/26-eth0-rx-0-21swapper/310:49:143
29715050,0irq/26-eth0-rx-0-21swapper/310:33:543
29715050,0irq/26-eth0-rx-0-21swapper/310:00:103
29715050,0irq/26-eth0-rx-0-21swapper/307:44:103
29715050,0irq/26-eth0-rx-0-21swapper/307:25:513
259950,0migration/29361-21missed_timers12:24:092
259950,0migration/23818-21sh11:00:552
259950,0migration/213035-21latency_hist11:08:522
249950,0watchdog/24248-21sh12:03:542
179950,0migration/1629-21cpuspeed_turbos06:59:031
179950,0migration/15737-21kthreadcore12:24:081
179950,0migration/15349-21taskset09:41:571
179950,0migration/13547-21aten_r1power_vo08:14:051
179950,0migration/132750-21kthreadcore08:59:071
179950,0migration/13243-21latency_hist08:13:521
179950,0migration/128904-21sh10:16:351
179950,0migration/128409-21sendmail_mailqu09:34:111
179950,0migration/126269-21timerwakeupswit12:14:161
179950,0migration/124365-21kthreadcore07:39:091
179950,0migration/115268-21latency08:19:091
179950,0migration/113563-21taskset09:26:311
179950,0migration/11277-21kthreadcore09:19:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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