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2026-07-17 - 11:24

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 Jul 17, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450550,0irq/25-eth10-21swapper/318:48:093
3107023724,0sleep10-21swapper/118:46:411
3098923430,0sleep20-21swapper/218:45:462
3120423322,0sleep00-21swapper/018:48:120
313919976,0cyclictest0-21swapper/020:44:530
35160,0ktimersoftd/30-21swapper/319:04:363
339960,0migration/38416-21sh21:16:103
339960,0migration/35393-21munin-node00:09:483
339960,0migration/327470-21sh00:02:463
339960,0migration/315875-21munin-node20:14:493
313929960,0cyclictest0-21swapper/123:44:421
313919965,0cyclictest11699-21timerandwakeup18:54:590
29725060,0irq/27-eth0-tx-4309-21if_eth1.323:49:512
29715060,0irq/26-eth0-rx-7449-21gltestperf22:34:493
29715060,0irq/26-eth0-rx-31016-21cut21:49:533
29715060,0irq/26-eth0-rx-27251-21df21:29:473
29715060,0irq/26-eth0-rx-26805-21python22:04:593
29715060,0irq/26-eth0-rx-24701-21users21:25:033
29715060,0irq/26-eth0-rx-20164-21kthreadcore22:59:513
29715060,0irq/26-eth0-rx-12736-21aten_r1power_po21:59:473
27160,0ktimersoftd/20-21swapper/219:04:362
8215050,0irq/24-0000:00:27585-21perf19:59:362
4150,0ktimersoftd/00-21swapper/023:15:070
339950,0migration/38786-21missed_timers23:49:543
339950,0migration/36269-21runrttasks19:15:413
339950,0migration/35814-21cpuspeed_turbos20:54:493
339950,0migration/34789-21fschecks_time21:54:503
339950,0migration/34095-21kthreadcore23:29:523
339950,0migration/330809-21kthreadcore19:59:543
339950,0migration/328871-21aten_r1power_fr20:24:473
339950,0migration/327842-21fschecks_count23:44:523
339950,0migration/327355-21taskset19:57:073
339950,0migration/326526-21sshd19:34:053
339950,0migration/325997-21kthreadcore20:44:533
339950,0migration/324800-21kthreadcore21:04:523
339950,0migration/320549-21taskset19:50:033
339950,0migration/31883-21idleruntime19:39:503
339950,0migration/315016-21taskset22:39:393
339950,0migration/315015-21kthreadcore00:14:523
339950,0migration/314363-21fschecks_count22:19:493
313939955,0cyclictest0-21swapper/222:34:552
313939954,0cyclictest17376-21awk20:39:512
313939950,0cyclictest0-21swapper/223:49:102
313939950,0cyclictest0-21swapper/223:04:142
313939950,0cyclictest0-21swapper/222:03:332
313939950,0cyclictest0-21swapper/221:33:162
313939950,0cyclictest0-21swapper/220:54:102
313939950,0cyclictest0-21swapper/200:11:152
313929955,0cyclictest0-21swapper/122:34:521
313929955,0cyclictest0-21swapper/122:18:091
313929955,0cyclictest0-21swapper/121:46:091
313929955,0cyclictest0-21swapper/121:22:201
313929955,0cyclictest0-21swapper/121:15:531
313929955,0cyclictest0-21swapper/120:53:481
313929954,0cyclictest14425-21awk19:24:531
313929950,0cyclictest0-21swapper/121:59:041
313919955,0cyclictest0-21swapper/022:29:530
29725050,0irq/27-eth0-tx-9093-21sed22:54:522
29725050,0irq/27-eth0-tx-32296-21ssh22:49:502
29725050,0irq/27-eth0-tx-26771-21ps19:54:590
29725050,0irq/27-eth0-tx-23248-21munin-node22:24:532
29725050,0irq/27-eth0-tx-22171-21kthreadcore23:19:532
29725050,0irq/27-eth0-tx-20518-21ssh21:00:572
29725050,0irq/27-eth0-tx-19749-21munin-node21:44:472
29725050,0irq/27-eth0-tx-17642-21ssh21:40:172
29725050,0irq/27-eth0-tx-1681-21sh00:04:552
29725050,0irq/27-eth0-tx-15480-21munin-node20:14:580
29725050,0irq/27-eth0-tx-10140-21ssh21:37:252
29725050,0irq/27-eth0-tx-0-21swapper/223:56:212
29725050,0irq/27-eth0-tx-0-21swapper/223:25:552
29725050,0irq/27-eth0-tx-0-21swapper/221:50:592
29725050,0irq/27-eth0-tx-0-21swapper/221:24:552
29725050,0irq/27-eth0-tx-0-21swapper/221:12:362
29725050,0irq/27-eth0-tx-0-21swapper/220:57:012
29725050,0irq/27-eth0-tx-0-21swapper/020:19:580
29715050,0irq/26-eth0-rx-8940-21cat23:14:353
29715050,0irq/26-eth0-rx-8785-21cut22:14:543
29715050,0irq/26-eth0-rx-32320-21ssh23:25:193
29715050,0irq/26-eth0-rx-22125-21ssh22:24:363
29715050,0irq/26-eth0-rx-14820-21ssh22:56:443
29715050,0irq/26-eth0-rx-14500-21python20:09:593
29715050,0irq/26-eth0-rx-0-21swapper/323:59:213
29715050,0irq/26-eth0-rx-0-21swapper/323:41:343
29715050,0irq/26-eth0-rx-0-21swapper/323:34:463
29715050,0irq/26-eth0-rx-0-21swapper/323:19:493
29715050,0irq/26-eth0-rx-0-21swapper/323:14:493
29715050,0irq/26-eth0-rx-0-21swapper/322:52:113
29715050,0irq/26-eth0-rx-0-21swapper/322:47:493
29715050,0irq/26-eth0-rx-0-21swapper/322:31:263
29715050,0irq/26-eth0-rx-0-21swapper/322:09:553
29715050,0irq/26-eth0-rx-0-21swapper/321:45:023
29715050,0irq/26-eth0-rx-0-21swapper/321:40:063
29715050,0irq/26-eth0-rx-0-21swapper/321:34:533
29715050,0irq/26-eth0-rx-0-21swapper/320:51:383
29715050,0irq/26-eth0-rx-0-21swapper/320:29:533
29715050,0irq/26-eth0-rx-0-21swapper/300:04:383
27150,0ktimersoftd/20-21swapper/223:40:402
27150,0ktimersoftd/20-21swapper/223:15:072
259950,0migration/24488-21taskset22:30:052
259950,0migration/232275-21taskset23:08:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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