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2026-09-04 - 05:54

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 Sep 04, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2325025554,0sleep20-21swapper/218:40:422
304450350,0irq/25-eth10-21swapper/318:40:353
2342623524,0sleep00-21swapper/018:42:440
2328623424,0sleep10-21swapper/118:41:091
23687991111,0cyclictest27758-21sensors20:45:182
339960,0migration/318259-21sh22:21:023
339960,0migration/318072-21sh22:41:593
339960,0migration/316765-21taskset23:43:193
339960,0migration/313312-21sh20:59:193
339960,0migration/311168-21sh22:18:283
29715060,0irq/26-eth0-rx-5949-21df_abs21:15:103
29715060,0irq/26-eth0-rx-25232-21df_inode00:10:093
29715060,0irq/26-eth0-rx-24875-21grep23:05:233
29715060,0irq/26-eth0-rx-0-21swapper/320:44:553
236879960,0cyclictest19414-21aten_r1power_fr22:45:102
236879960,0cyclictest0-21swapper/223:35:562
236859960,0cyclictest0-21swapper/122:35:181
19160,0ktimersoftd/10-21swapper/121:58:341
19160,0ktimersoftd/10-21swapper/121:49:351
149960,0migration/09858-21sh22:57:520
149960,0migration/05441-21kthreadcore22:15:140
149960,0migration/026330-21runrttasks23:09:310
149960,0migration/019500-21taskset22:24:480
8215050,0irq/24-0000:00:824-21cat23:54:552
8215050,0irq/24-0000:00:641-21perf23:54:552
8215050,0irq/24-0000:00:10797-21tr19:45:132
339950,0migration/39512-21fschecks_count00:00:083
339950,0migration/3898-21sh23:54:563
339950,0migration/33648-21hwlatdetect22:55:103
339950,0migration/33552-21kthreadcore19:40:153
339950,0migration/33013-21timerwakeupswit21:30:193
339950,0migration/329906-21latency_hist20:49:553
339950,0migration/329332-21taskset20:49:053
339950,0migration/327166-21kthreadcore23:50:133
339950,0migration/326895-21sh22:28:053
339950,0migration/325102-21kthreadcore21:05:183
339950,0migration/323993-21timerandwakeup19:05:203
339950,0migration/322333-21kernelversion20:20:123
339950,0migration/322248-21kthreadcore19:55:143
339950,0migration/321271-21munin-node21:45:113
339950,0migration/320440-21taskset20:15:503
339950,0migration/319881-21idleruntime-cro19:54:563
339950,0migration/319404-21cpuspeed_turbos19:30:103
339950,0migration/319222-21kthreadcore23:45:123
339950,0migration/315841-21kthreadcore19:00:143
339950,0migration/314386-21munin-node21:40:143
339950,0migration/314197-21munin-node21:00:103
339950,0migration/31072-21kthreadcore21:10:133
29725050,0irq/27-eth0-tx-5586-21munin-node21:15:142
29725050,0irq/27-eth0-tx-3533-21ssh21:52:462
29725050,0irq/27-eth0-tx-31251-21kthreadcore21:10:122
29725050,0irq/27-eth0-tx-20102-21munin-node19:55:160
29725050,0irq/27-eth0-tx-13515-21munin-node21:20:102
29725050,0irq/27-eth0-tx-12516-21munin-node22:00:192
29725050,0irq/27-eth0-tx-11665-21tail19:00:080
29725050,0irq/27-eth0-tx-0-21swapper/223:46:352
29725050,0irq/27-eth0-tx-0-21swapper/223:40:312
29725050,0irq/27-eth0-tx-0-21swapper/223:20:172
29725050,0irq/27-eth0-tx-0-21swapper/222:33:082
29725050,0irq/27-eth0-tx-0-21swapper/222:10:082
29725050,0irq/27-eth0-tx-0-21swapper/221:57:542
29725050,0irq/27-eth0-tx-0-21swapper/020:45:320
29715050,0irq/26-eth0-rx-7144-21kthreadcore19:20:143
29715050,0irq/26-eth0-rx-6559-21runrttasks21:53:183
29715050,0irq/26-eth0-rx-513-21missed_timers20:25:133
29715050,0irq/26-eth0-rx-2730-21ssh22:33:563
29715050,0irq/26-eth0-rx-19814-21fschecks_count22:45:123
29715050,0irq/26-eth0-rx-17831-21kthreadcore21:20:133
29715050,0irq/26-eth0-rx-17787-21ssh23:24:313
29715050,0irq/26-eth0-rx-1075-21kthreadcore22:10:143
29715050,0irq/26-eth0-rx-0-21swapper/323:30:143
29715050,0irq/26-eth0-rx-0-21swapper/323:16:443
29715050,0irq/26-eth0-rx-0-21swapper/323:13:223
29715050,0irq/26-eth0-rx-0-21swapper/322:51:583
29715050,0irq/26-eth0-rx-0-21swapper/322:05:433
29715050,0irq/26-eth0-rx-0-21swapper/321:38:083
27150,0ktimersoftd/20-21swapper/223:30:002
259950,0migration/226040-21kthreadcore21:25:162
259950,0migration/221462-21fschecks_count21:45:122
259950,0migration/221178-21kthreadcore19:05:142
259950,0migration/217947-21munin-node19:25:172
259950,0migration/217116-21sh23:00:502
249950,0watchdog/28487-21cut20:55:142
249950,0watchdog/24435-21ssh20:52:062
249950,0watchdog/231112-21sh00:10:532
249950,0watchdog/224483-21kthreadcore19:55:142
236879955,0cyclictest0-21swapper/223:19:322
236879955,0cyclictest0-21swapper/222:54:282
236879955,0cyclictest0-21swapper/222:26:052
236879955,0cyclictest0-21swapper/222:09:322
236879950,0cyclictest0-21swapper/221:05:412
236879950,0cyclictest0-21swapper/200:09:312
236859955,0cyclictest0-21swapper/123:20:041
236859955,0cyclictest0-21swapper/122:44:171
236859954,0cyclictest27781-21tr20:00:121
236859950,0cyclictest0-21swapper/123:18:391
236849955,0cyclictest10-21rcuc/023:03:150
236849955,0cyclictest0-21swapper/021:35:160
236849954,0cyclictest6807-21cut21:15:140
236849954,0cyclictest2785-21awk20:30:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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