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2026-08-14 - 00:33

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 Aug 13, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450810,0irq/25-eth10-21swapper/306:43:403
1687327574,0sleep10-21swapper/106:43:481
1678126665,0sleep00-21swapper/006:42:430
1711323425,0sleep20-21swapper/206:46:372
4160,0ktimersoftd/00-21swapper/011:24:240
339960,0migration/33863-21munin-node06:57:183
339960,0migration/317694-21sh12:10:503
339960,0migration/312303-21sh10:24:433
29725060,0irq/27-eth0-tx-27004-21munin-node08:07:170
29715060,0irq/26-eth0-rx-32758-21cut10:37:163
29715060,0irq/26-eth0-rx-20164-21perl11:32:133
29715060,0irq/26-eth0-rx-15386-21grep10:47:153
172149960,0cyclictest0-21swapper/011:06:330
149960,0migration/03871-21sh11:01:490
149960,0migration/03707-21sh10:17:520
149960,0migration/026375-21sh11:56:190
149960,0migration/023965-21latency_hist06:51:590
149960,0migration/019378-21sh10:48:430
149960,0migration/018032-21sh11:50:020
149960,0migration/013139-21switchtime09:22:210
35150,0ktimersoftd/30-21swapper/311:24:243
339950,0migration/37914-21kthreadcore11:02:153
339950,0migration/37703-21kthreadcore07:27:163
339950,0migration/36098-21taskset09:19:143
339950,0migration/33756-21kthreadcore07:22:163
339950,0migration/329790-21aten_r1power_en10:17:103
339950,0migration/32895-21latency_hist11:41:583
339950,0migration/328627-21munin-node10:57:083
339950,0migration/327708-21kthreadcore06:52:163
339950,0migration/323967-21kthreadcore08:02:153
339950,0migration/322247-21munin-node10:12:103
339950,0migration/319434-21aten_r1power_en07:37:113
339950,0migration/318872-21fschecks_count07:12:113
339950,0migration/318280-21munin-node11:07:223
339950,0migration/313990-21cpuspeed_turbos07:57:123
339950,0migration/313926-21irqrtprio07:32:143
339950,0migration/313418-21runrttasks10:27:093
339950,0migration/311560-21kthreadcore09:02:163
339950,0migration/311149-21taskset07:02:313
29725050,0irq/27-eth0-tx-9632-21taskset12:05:262
29725050,0irq/27-eth0-tx-7038-21munin-node07:52:130
29725050,0irq/27-eth0-tx-5334-21munin-node10:22:112
29725050,0irq/27-eth0-tx-3542-21lldpd09:18:162
29725050,0irq/27-eth0-tx-330-21ssh09:57:152
29725050,0irq/27-eth0-tx-2982-21munin-node11:42:212
29725050,0irq/27-eth0-tx-28626-21munin-node10:57:162
29725050,0irq/27-eth0-tx-27786-21ssh10:55:152
29725050,0irq/27-eth0-tx-22270-21df_inode10:12:102
29725050,0irq/27-eth0-tx-19830-21ssh10:50:072
29725050,0irq/27-eth0-tx-12930-21proc_pri09:22:182
29725050,0irq/27-eth0-tx-10408-21ssh09:02:162
29725050,0irq/27-eth0-tx-0-21swapper/211:19:312
29725050,0irq/27-eth0-tx-0-21swapper/008:47:170
29725050,0irq/27-eth0-tx-0-21swapper/008:39:550
29715050,0irq/26-eth0-rx-6407-21ssh09:41:553
29715050,0irq/26-eth0-rx-3054-21kthreadcore08:57:163
29715050,0irq/26-eth0-rx-24787-21cut08:52:153
29715050,0irq/26-eth0-rx-12805-21ssh09:42:223
29715050,0irq/26-eth0-rx-0-21swapper/312:02:153
29715050,0irq/26-eth0-rx-0-21swapper/311:47:163
29715050,0irq/26-eth0-rx-0-21swapper/311:39:023
29715050,0irq/26-eth0-rx-0-21swapper/311:27:263
29715050,0irq/26-eth0-rx-0-21swapper/311:17:203
29715050,0irq/26-eth0-rx-0-21swapper/311:12:103
29715050,0irq/26-eth0-rx-0-21swapper/310:54:303
29715050,0irq/26-eth0-rx-0-21swapper/310:42:143
29715050,0irq/26-eth0-rx-0-21swapper/310:07:273
29715050,0irq/26-eth0-rx-0-21swapper/310:03:543
29715050,0irq/26-eth0-rx-0-21swapper/309:57:443
29715050,0irq/26-eth0-rx-0-21swapper/309:55:553
29715050,0irq/26-eth0-rx-0-21swapper/309:27:173
29715050,0irq/26-eth0-rx-0-21swapper/309:22:463
29715050,0irq/26-eth0-rx-0-21swapper/308:09:503
29715050,0irq/26-eth0-rx-0-21swapper/307:52:223
29715050,0irq/26-eth0-rx-0-21swapper/307:17:203
259950,0migration/231773-21irqcore06:57:152
259950,0migration/223319-21unixbench-2d06:47:212
259950,0migration/216354-21latency11:47:172
259950,0migration/214425-21latency_hist09:46:592
259950,0migration/213751-21latency_hist10:06:592
259950,0migration/212140-21sh11:07:062
249950,0watchdog/2324-21latency11:37:162
249950,0watchdog/20-21swapper/210:32:172
19150,0ktimersoftd/10-21swapper/111:30:071
19150,0ktimersoftd/10-21swapper/111:19:051
172179955,0cyclictest15441-21diskmemload10:07:512
172179955,0cyclictest0-21swapper/211:57:542
172179955,0cyclictest0-21swapper/209:32:232
172159955,0cyclictest0-21swapper/111:47:091
172159955,0cyclictest0-21swapper/111:09:471
172159955,0cyclictest0-21swapper/108:51:401
172159954,0cyclictest7108-21grep07:27:151
172159950,0cyclictest0-21swapper/112:12:511
172159950,0cyclictest0-21swapper/111:37:411
172159950,0cyclictest0-21swapper/111:00:101
172159950,0cyclictest0-21swapper/110:51:391
172159950,0cyclictest0-21swapper/110:31:381
172159950,0cyclictest0-21swapper/109:16:161
172149950,0cyclictest18433-21munin-node07:12:120
172149950,0cyclictest0-21swapper/011:18:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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