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2026-04-24 - 14:59

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 24, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450560,0irq/25-eth10-21swapper/306:57:183
1049423829,0sleep10-21swapper/106:56:141
1034323625,0sleep00-21swapper/006:54:240
1052123324,0sleep20-21swapper/206:56:312
339960,0migration/37830-21sh10:14:403
339960,0migration/325298-21sh09:47:193
339960,0migration/322644-21sh11:44:163
339960,0migration/318130-21munin-node10:22:493
339960,0migration/315370-21sh10:39:073
339960,0migration/314938-21sh11:40:013
339960,0migration/310902-21irqrtprio09:17:483
339960,0migration/31039-21sh09:31:503
29715060,0irq/26-eth0-rx-7740-21ssh11:57:373
29715060,0irq/26-eth0-rx-1739-21irqcore10:32:473
29715060,0irq/26-eth0-rx-0-21swapper/311:16:193
149960,0migration/06316-21timerwakeupswit08:02:560
149960,0migration/031966-21timerwakeupswit07:57:550
149960,0migration/026912-21kthreadcore10:07:480
149960,0migration/017998-21munin-node09:22:440
149960,0migration/016081-21sh10:41:090
149960,0migration/014225-21kthreadcore10:17:480
149960,0migration/012497-21kthreadcore11:17:480
106839966,0cyclictest8832-21diskmemload10:17:142
106839960,0cyclictest0-21swapper/209:03:552
106829960,0cyclictest0-21swapper/111:29:281
8215050,0irq/24-0000:00:9410-21latency_hist09:37:322
8215050,0irq/24-0000:00:1115-21sa108:27:332
339950,0migration/37517-21kthreadcore07:17:493
339950,0migration/35671-21munin-node11:32:533
339950,0migration/331887-21aten_r1power_po12:12:423
339950,0migration/329811-21munin-node11:27:503
339950,0migration/326980-21kthreadcore09:07:483
339950,0migration/32572-21irqrtprio08:27:493
339950,0migration/325010-21munin-node11:07:443
339950,0migration/324735-21latency07:52:513
339950,0migration/323834-21taskset07:06:403
339950,0migration/319080-21kthreadcore09:02:493
339950,0migration/318154-21kthreadcore08:37:473
339950,0migration/314298-21kthreadcore07:47:493
29725050,0irq/27-eth0-tx-8581-21munin-node10:57:462
29725050,0irq/27-eth0-tx-667-21munin-node10:32:532
29725050,0irq/27-eth0-tx-30654-21unixbench_multi11:07:542
29725050,0irq/27-eth0-tx-25873-21ssh10:47:472
29725050,0irq/27-eth0-tx-25374-21ssh10:07:432
29725050,0irq/27-eth0-tx-24399-21munin-node11:27:462
29725050,0irq/27-eth0-tx-19265-21tr10:42:482
29725050,0irq/27-eth0-tx-11980-21kthreadcore11:37:492
29725050,0irq/27-eth0-tx-10890-21munin-node06:57:470
29725050,0irq/27-eth0-tx-0-21swapper/210:28:212
29725050,0irq/27-eth0-tx-0-21swapper/209:48:342
29725050,0irq/27-eth0-tx-0-21swapper/209:19:152
29725050,0irq/27-eth0-tx-0-21swapper/209:00:582
29725050,0irq/27-eth0-tx-0-21swapper/008:44:550
29725050,0irq/27-eth0-tx-0-21swapper/008:44:550
29725050,0irq/27-eth0-tx-0-21swapper/007:29:420
29715050,0irq/26-eth0-rx-3639-21grep09:32:493
29715050,0irq/26-eth0-rx-30958-21open_files10:07:523
29715050,0irq/26-eth0-rx-29551-21python12:07:543
29715050,0irq/26-eth0-rx-18378-21grep12:22:493
29715050,0irq/26-eth0-rx-16505-21sh10:00:523
29715050,0irq/26-eth0-rx-14473-21sh12:20:183
29715050,0irq/26-eth0-rx-1118-21taskset08:02:463
29715050,0irq/26-eth0-rx-0-21swapper/311:47:433
29715050,0irq/26-eth0-rx-0-21swapper/311:22:493
29715050,0irq/26-eth0-rx-0-21swapper/311:22:123
29715050,0irq/26-eth0-rx-0-21swapper/310:57:493
29715050,0irq/26-eth0-rx-0-21swapper/310:17:543
29715050,0irq/26-eth0-rx-0-21swapper/310:02:473
29715050,0irq/26-eth0-rx-0-21swapper/309:52:463
29715050,0irq/26-eth0-rx-0-21swapper/309:37:433
29715050,0irq/26-eth0-rx-0-21swapper/309:12:503
29715050,0irq/26-eth0-rx-0-21swapper/309:00:013
29715050,0irq/26-eth0-rx-0-21swapper/307:22:493
259950,0migration/27019-21munin-node09:12:532
259950,0migration/231897-21aten2.4-expect07:37:432
259950,0migration/23009-21kthreadcore11:32:502
259950,0migration/223607-21sh11:26:062
259950,0migration/223422-21ntp_offset09:22:522
259950,0migration/217316-21open_files07:22:522
249950,0watchdog/26319-21python10:52:552
249950,0watchdog/212085-21grep07:42:552
19150,0ktimersoftd/10-21swapper/109:03:211
179950,0migration/129535-21needreboot07:07:521
179950,0migration/123337-21sh10:43:591
179950,0migration/122719-21latency10:02:481
179950,0migration/117771-21kthreadcore07:47:501
179950,0migration/117185-21sh09:21:361
169950,0watchdog/116382-21if_err_eth012:22:461
149950,0migration/09854-21kthreadcore08:32:500
149950,0migration/08482-21kthreadcore08:07:480
149950,0migration/06949-21kthreadcore07:17:490
149950,0migration/06418-21unixbench_singl11:12:550
149950,0migration/05865-21taskset12:13:490
149950,0migration/05831-21kthreadcore08:52:500
149950,0migration/04140-21kthreadcore10:52:500
149950,0migration/03425-21kthreadcore07:37:490
149950,0migration/032165-21sh10:51:200
149950,0migration/030691-21sh12:10:130
149950,0migration/025954-21idleruntime07:32:470
149950,0migration/025221-21fschecks_time11:07:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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