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2026-08-29 - 22:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Sat Aug 29, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
702621170,5sleep27027-21sed08:13:162
2194991110,8rtkit-daemon0-21swapper/308:03:103
26611991014,89cyclictest0-21swapper/009:43:250
26611991005,88cyclictest0-21swapper/008:28:160
26611991004,89cyclictest0-21swapper/008:45:240
26611991004,27cyclictest0-21swapper/009:18:230
26611991003,74cyclictest10260-21cpuspeed_turbos09:08:110
2661199987,69cyclictest0-21swapper/008:26:380
2661199984,76cyclictest0-21swapper/009:03:100
219499980,5rtkit-daemon12-21rcu_preempt06:43:201
219499980,5rtkit-daemon12-21rcu_preempt06:43:201
2661199964,75cyclictest0-21swapper/008:04:030
26611999620,11cyclictest0-21swapper/010:53:200
184472960,6sleep018444-21tune2fs10:58:110
2661599954,79cyclictest20562-21runrttasks07:44:523
2661199944,74cyclictest0-21swapper/010:50:100
2661199944,74cyclictest0-21swapper/010:50:100
2661199944,72cyclictest0-21swapper/011:08:230
2661199944,27cyclictest0-21swapper/009:33:300
2661199944,27cyclictest0-21swapper/009:33:300
2661599934,68cyclictest0-21swapper/310:08:103
2661599934,68cyclictest0-21swapper/310:08:103
2661199933,70cyclictest0-21swapper/010:17:340
26611999321,12cyclictest0-21swapper/007:45:540
2661599924,78cyclictest0-21swapper/307:18:143
2661599924,68cyclictest0-21swapper/308:32:453
2661599924,65cyclictest0-21swapper/305:58:033
26615999222,47cyclictest10696-21aten_r1power_po09:58:053
2661199914,80cyclictest0-21swapper/010:25:030
2661199914,80cyclictest0-21swapper/010:00:070
2661199914,79cyclictest0-21swapper/007:08:160
2661199914,29cyclictest0-21swapper/005:43:040
2661599905,13cyclictest10827-21sendmail_mailqu08:18:263
2661599904,78cyclictest0-21swapper/308:23:353
2661599904,76cyclictest0-21swapper/308:00:533
2661599904,23cyclictest0-21swapper/308:17:483
2661599904,20cyclictest0-21swapper/308:58:213
26615999025,57cyclictest27909-21grep10:23:113
26615999018,10cyclictest0-21swapper/310:42:433
26615999017,10cyclictest0-21swapper/310:31:363
2661199905,78cyclictest0-21swapper/008:12:250
2661199905,78cyclictest0-21swapper/008:12:250
2661199904,78cyclictest0-21swapper/008:14:110
2661199904,26cyclictest1227-21runrttasks07:36:280
2661199904,13cyclictest30644-21runrttasks09:38:130
2661199903,70cyclictest0-21swapper/008:22:490
26611999028,48cyclictest0-21swapper/009:17:280
2661599896,61cyclictest8360-21irqstats09:53:163
2661599894,64cyclictest0-21swapper/307:53:243
2661599894,63cyclictest0-21swapper/307:33:123
2661599894,62cyclictest0-21swapper/310:44:053
26615998919,12cyclictest0-21swapper/308:49:153
26615998919,12cyclictest0-21swapper/308:49:153
2661199894,78cyclictest0-21swapper/010:18:110
2661199894,77cyclictest0-21swapper/007:59:120
2661199894,76cyclictest0-21swapper/010:10:270
2661199894,76cyclictest0-21swapper/010:10:270
2661199894,28cyclictest0-21swapper/008:58:160
2661199894,25cyclictest0-21swapper/010:38:030
2661199894,12cyclictest0-21swapper/007:53:150
2661599884,74cyclictest22058-21timerandwakeup10:13:253
2661599884,62cyclictest0-21swapper/305:58:363
2661599884,62cyclictest0-21swapper/305:58:363
2661599884,61cyclictest0-21swapper/309:08:223
2661599884,22cyclictest0-21swapper/310:32:583
2661199884,78cyclictest0-21swapper/007:18:330
2661199884,77cyclictest0-21swapper/009:23:250
2661199884,29cyclictest0-21swapper/008:37:410
2661199884,28cyclictest0-21swapper/009:53:180
26611998830,50cyclictest23922-21wc08:38:260
26611998811,12cyclictest0-21swapper/008:48:260
26611998811,12cyclictest0-21swapper/008:48:260
2661599875,26cyclictest0-21swapper/309:51:473
2661599874,73cyclictest0-21swapper/307:38:253
2661599874,24cyclictest0-21swapper/310:54:263
2661599874,24cyclictest0-21swapper/309:21:273
2661599874,21cyclictest0-21swapper/308:45:223
2661199874,74cyclictest0-21swapper/008:53:310
26611998716,10cyclictest0-21swapper/010:02:550
26611998714,12cyclictest0-21swapper/007:48:370
2661599864,75cyclictest0-21swapper/309:03:133
2661599864,74cyclictest0-21swapper/310:20:423
2661599864,74cyclictest0-21swapper/308:53:593
2661599864,72cyclictest0-21swapper/309:34:043
2661599864,72cyclictest0-21swapper/309:34:043
2661599864,23cyclictest3522-21df_inode06:03:183
2661599864,23cyclictest0-21swapper/310:50:343
2661599864,23cyclictest0-21swapper/310:50:343
2661599863,25cyclictest0-21swapper/310:05:113
26615998623,56cyclictest1519-21gltestperf09:43:153
2661199864,75cyclictest0-21swapper/009:27:560
2661199864,30cyclictest0-21swapper/011:05:560
2661199864,26cyclictest0-21swapper/010:35:420
2661199864,26cyclictest0-21swapper/007:32:050
2661199863,15cyclictest0-21swapper/009:49:060
26611998613,10cyclictest107550irq/46-eth007:13:120
2661599854,74cyclictest0-21swapper/309:28:283
2661599854,74cyclictest0-21swapper/308:40:373
2661599854,73cyclictest0-21swapper/311:08:073
2661599854,73cyclictest0-21swapper/308:33:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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