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2026-07-23 - 15:42

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 Thu Jul 23, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450660,0irq/25-eth10-21swapper/306:46:183
117723425,0sleep20-21swapper/206:47:332
113623422,0sleep10-21swapper/106:47:031
94422921,0sleep00-21swapper/006:44:540
35160,0ktimersoftd/30-21swapper/311:53:003
339960,0migration/332380-21gltestperf09:29:123
339960,0migration/331533-21sh09:08:043
339960,0migration/325298-21sh12:06:253
339960,0migration/322267-21missed_timers07:49:173
339960,0migration/321602-21sh09:40:293
339960,0migration/314548-21sh08:55:593
339960,0migration/314431-21sh09:15:373
339960,0migration/313707-21sh09:35:303
339960,0migration/313272-21munin-node08:34:173
29715060,0irq/26-eth0-rx-5681-21ssh09:52:233
29715060,0irq/26-eth0-rx-1678-21python11:09:203
149960,0migration/05427-21sh09:51:350
13779965,0cyclictest2295-21grep06:49:122
13769966,0cyclictest32024-21diskmemload10:19:271
13769966,0cyclictest32024-21diskmemload09:35:281
13769960,0cyclictest0-21swapper/108:39:201
4150,0ktimersoftd/00-21swapper/010:28:210
339950,0migration/38972-21taskset07:18:213
339950,0migration/36500-21munin-node08:29:143
339950,0migration/34587-21kthreadcore08:49:173
339950,0migration/33595-21munin-node11:54:133
339950,0migration/332658-21kthreadcore07:59:153
339950,0migration/332114-21kthreadcore10:09:153
339950,0migration/330210-21munin-node08:19:193
339950,0migration/325772-21kthreadcore07:04:163
339950,0migration/324092-21taskset08:16:173
339950,0migration/322586-21munin-node10:24:133
339950,0migration/322308-21taskset08:59:593
339950,0migration/321817-21munin-node09:19:223
339950,0migration/321077-21sh10:01:013
339950,0migration/320176-21irqcore11:44:153
339950,0migration/317294-21kthreadcore06:59:173
339950,0migration/316920-21rt-features11:39:203
339950,0migration/313445-21kthreadcore07:44:163
339950,0migration/310102-21taskset11:14:263
29725050,0irq/27-eth0-tx-2963-21kthreadcore08:49:160
29725050,0irq/27-eth0-tx-2549-21munin-node07:14:170
29725050,0irq/27-eth0-tx-23581-21munin-node07:54:200
29725050,0irq/27-eth0-tx-13000-21switchtime09:34:192
29725050,0irq/27-eth0-tx-0-21swapper/008:14:200
29725050,0irq/27-eth0-tx-0-21swapper/008:00:240
29725050,0irq/27-eth0-tx-0-21swapper/007:31:410
29715050,0irq/26-eth0-rx-4828-21kthreadcore07:39:143
29715050,0irq/26-eth0-rx-2801-21tr09:09:163
29715050,0irq/26-eth0-rx-25535-21munin-node11:24:203
29715050,0irq/26-eth0-rx-24462-21kthreadcore10:44:163
29715050,0irq/26-eth0-rx-23351-21cut08:39:163
29715050,0irq/26-eth0-rx-18778-21cut10:39:193
29715050,0irq/26-eth0-rx-11867-21fschecks_time08:09:123
29715050,0irq/26-eth0-rx-0-21swapper/311:05:403
29715050,0irq/26-eth0-rx-0-21swapper/310:56:033
29715050,0irq/26-eth0-rx-0-21swapper/310:04:403
29715050,0irq/26-eth0-rx-0-21swapper/308:44:163
29715050,0irq/26-eth0-rx-0-21swapper/308:04:163
259950,0migration/231633-21sh09:08:202
249950,0watchdog/2495-21kthreadcore11:29:162
19150,0ktimersoftd/10-21swapper/111:35:551
179950,0migration/17979-21timerwakeupswit12:14:191
179950,0migration/129088-21gltestperf11:09:111
179950,0migration/126443-21aten_r1power_en12:09:071
179950,0migration/12349-21latency_hist07:13:591
179950,0migration/12349-21latency_hist07:13:591
179950,0migration/123211-21kthreadcore10:44:161
179950,0migration/122631-21kthreadcore11:04:151
179950,0migration/118058-21kthreadcore09:19:151
169950,0watchdog/130810-21kthreadcore11:49:161
169950,0watchdog/12470-21sensors_volt07:34:211
169950,0watchdog/121125-21kthreadcore08:14:171
149950,0migration/07072-21kthreadcore08:29:150
149950,0migration/06584-21gltestperf10:14:110
149950,0migration/05423-21munin-node10:34:090
149950,0migration/04308-21taskset10:32:060
149950,0migration/0395-21sh12:10:140
149950,0migration/031489-21irqrtprio10:09:150
149950,0migration/028335-21fschecks_time11:29:120
149950,0migration/019145-21runrttasks11:00:560
149950,0migration/019118-21taskset11:22:530
149950,0migration/018304-21taskset08:34:390
149950,0migration/018140-21kthreadcore09:39:160
149950,0migration/017456-21kthreadcore06:59:170
149950,0migration/017400-21kthreadcore08:59:150
149950,0migration/016878-21latency_hist07:48:580
149950,0migration/016781-21sh11:59:290
149950,0migration/015168-21sh09:17:540
149950,0migration/015124-21timerwakeupswit07:19:210
149950,0migration/01499-21munin-node11:09:180
149950,0migration/012469-21timerwakeupswit09:54:230
149950,0migration/011137-21sh10:55:420
149950,0migration/010138-21taskset11:14:320
13769955,0cyclictest0-21swapper/106:59:041
13769950,0cyclictest0-21swapper/110:50:211
13769950,0cyclictest0-21swapper/109:53:451
13769950,0cyclictest0-21swapper/109:30:441
13749954,0cyclictest14850-21munin-run09:38:580
8215040,0irq/24-0000:00:0-21swapper/208:48:582
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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