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2026-04-14 - 08:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Tue Apr 14, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
305912241165,24sleep30-21swapper/319:05:313
307582203167,23sleep20-21swapper/219:07:352
307722202166,24sleep10-21swapper/119:07:471
306082202164,26sleep00-21swapper/019:05:430
864021740,3sleep23104099cyclictest19:30:142
1139021520,2sleep30-21swapper/320:50:143
308272510,2sleep081ktimersoftd/021:35:010
3104099331,19cyclictest0-21swapper/222:35:532
3104099321,21cyclictest0-21swapper/220:44:362
3104099321,12cyclictest28867-21ntp_states23:55:202
3104099311,21cyclictest0-21swapper/200:26:252
3104099302,12cyclictest1333-21perl21:40:162
3104099301,13cyclictest0-21swapper/222:32:252
3104099301,13cyclictest0-21swapper/222:06:492
3104099301,11cyclictest0-21swapper/219:50:592
3102799304,12cyclictest8138-21munin-run19:30:000
3102799304,12cyclictest26969-21awk22:40:010
3104099291,9cyclictest0-21swapper/222:48:502
3104099291,19cyclictest0-21swapper/221:13:522
3104099291,13cyclictest0-21swapper/221:30:562
3104099291,12cyclictest0-21swapper/222:24:532
31036992911,8cyclictest5581-21kworker/u8:121:07:021
3102799291,13cyclictest13144-21munin-run20:55:010
3104099281,12cyclictest0-21swapper/221:16:042
3104099281,12cyclictest0-21swapper/220:11:552
3104099280,10cyclictest0-21swapper/219:58:112
3104099271,12cyclictest0-21swapper/200:37:492
3104099271,12cyclictest0-21swapper/200:34:572
3104099271,10cyclictest0-21swapper/223:05:002
3104099271,10cyclictest0-21swapper/219:35:032
3104099270,12cyclictest0-21swapper/223:15:002
3104099270,12cyclictest0-21swapper/223:15:002
3104099261,8cyclictest0-21swapper/221:35:142
3104099261,13cyclictest0-21swapper/223:49:402
3104099261,13cyclictest0-21swapper/200:20:252
3104099261,13cyclictest0-21swapper/200:20:252
3104099261,12cyclictest0-21swapper/219:25:412
3104099261,12cyclictest0-21swapper/200:10:532
3104099261,11cyclictest0-21swapper/221:00:182
3104099260,12cyclictest0-21swapper/222:01:252
3102799263,11cyclictest0-21swapper/019:25:010
3102799261,4cyclictest12723-21missed_timers22:05:180
3104099256,3cyclictest0-21swapper/223:25:102
3104099251,9cyclictest0-21swapper/200:07:012
3104099251,22cyclictest0-21swapper/222:50:522
3104099251,12cyclictest0-21swapper/223:34:562
3104099251,12cyclictest0-21swapper/221:25:522
3104099250,9cyclictest0-21swapper/220:06:392
3104099250,12cyclictest0-21swapper/221:46:282
3104099250,11cyclictest0-21swapper/220:54:142
3103699254,16cyclictest13548-40dnf22:07:261
3102799252,11cyclictest7813-21perf23:10:010
185332250,3sleep011-21rcuc/022:20:110
3104099241,14cyclictest0-21swapper/219:44:412
3104099241,12cyclictest0-21swapper/223:40:522
3104099241,12cyclictest0-21swapper/222:25:372
3104099241,12cyclictest0-21swapper/221:22:042
3104099241,10cyclictest0-21swapper/221:50:172
3104099240,11cyclictest0-21swapper/219:21:102
3104099240,10cyclictest0-21swapper/222:14:472
3103699243,7cyclictest24755-21latency_hist22:35:011
31036992412,6cyclictest26664-21kworker/u8:220:44:281
3104699231,16cyclictest0-21swapper/300:35:283
3104099235,3cyclictest0-21swapper/220:28:272
3104099231,7cyclictest0-21swapper/220:00:032
31040992315,3cyclictest0-21swapper/200:16:132
3104099231,20cyclictest0-21swapper/223:08:242
3104099231,14cyclictest0-21swapper/220:46:342
3104099231,14cyclictest0-21swapper/220:46:342
3103699237,7cyclictest21315-21munin-run20:00:011
3103699232,9cyclictest23-21ksoftirqd/100:20:011
3103699231,3cyclictest25728-21munin-run20:10:011
3103699231,19cyclictest5836-21chrt19:23:511
31027992317,3cyclictest18167-21munin-run22:20:010
3102799230,6cyclictest0-21swapper/023:39:590
3104699227,4cyclictest839-21lldpd22:00:163
3104699222,6cyclictest27575-21munin-run23:55:013
3104699222,11cyclictest6165-21/usr/sbin/munin19:25:153
3104099227,3cyclictest0-21swapper/220:17:092
3104099221,8cyclictest0-21swapper/220:32:032
3104099221,20cyclictest0-21swapper/223:40:002
3104099220,11cyclictest0-21swapper/222:19:572
3103699222,17cyclictest221ktimersoftd/122:45:181
31036992218,3cyclictest0-21swapper/121:36:501
3103699221,19cyclictest0-21swapper/123:26:361
3103699221,19cyclictest0-21swapper/122:10:201
3102799225,15cyclictest19135-21perf19:55:010
3102799221,9cyclictest21882-21kworker/0:221:18:170
3102799221,11cyclictest26348-21perf21:25:020
3252210,1sleep30-21swapper/320:25:133
3104699212,10cyclictest31234-21/usr/sbin/munin19:10:143
3104699211,11cyclictest6268-21ntp_states21:50:213
3104699211,11cyclictest23749-21/usr/sbin/munin20:05:253
3104099211,12cyclictest0-21swapper/222:59:242
3104099211,11cyclictest0-21swapper/221:08:582
3104099210,9cyclictest0-21swapper/219:45:532
3104099210,14cyclictest0-21swapper/200:04:572
3104099210,13cyclictest0-21swapper/222:44:292
3103699219,3cyclictest11112-21perl19:35:161
3103699216,12cyclictest0-21swapper/119:16:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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