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2025-12-09 - 04:01

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
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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Tue Dec 09, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20145999624,51cyclictest0-21swapper/322:53:093
20144998929,13cyclictest30462-21grep23:33:262
2014499885,27cyclictest0-21swapper/221:24:422
2014499885,27cyclictest0-21swapper/221:24:422
227012870,3sleep2281ktimersoftd/223:18:212
20145998730,50cyclictest29241-21unixbench_multi18:58:513
2014499873,26cyclictest0-21swapper/223:50:532
2014499864,34cyclictest15179-21tail19:38:382
20144998638,9cyclictest18695-21grep23:08:282
20144998626,12cyclictest1369-21runrttasks21:53:262
20144998622,12cyclictest0-21swapper/219:28:412
20145998426,38cyclictest756-21latency_hist20:18:153
2014499834,27cyclictest0-21swapper/222:13:112
20145998221,53cyclictest9076-21fschecks_time20:33:353
20144998212,33cyclictest0-21swapper/219:23:182
2014599813,69cyclictest1369-21runrttasks19:03:403
20145998125,49cyclictest25400-21cpuspeed_turbos21:08:293
20145998113,12cyclictest0-21swapper/323:08:373
2014599804,68cyclictest0-21swapper/320:43:153
2014599804,68cyclictest0-21swapper/320:43:153
2014599803,70cyclictest31053-21needreboot21:18:393
2014599803,70cyclictest1369-21runrttasks22:20:023
2014499803,23cyclictest17648-21hwlatdetect19:43:372
20144998018,12cyclictest0-21swapper/219:13:502
20145997938,34cyclictest30642-21sed23:33:283
2014599793,23cyclictest0-21swapper/300:08:393
2014599793,23cyclictest0-21swapper/300:08:393
20145997924,48cyclictest14038-21crond21:53:113
2014599792,70cyclictest407-21sort21:23:313
2014599792,70cyclictest407-21sort21:23:313
2014599783,69cyclictest0-21swapper/323:43:323
2014599783,68cyclictest14262-21cut22:58:363
2014599783,67cyclictest8535-21sendmail_mailqu21:38:413
2014599783,67cyclictest0-21swapper/321:54:463
20145997823,48cyclictest1558-21unixbench-2d19:08:503
20145997822,49cyclictest12157-21cpuspeed_turbos00:03:223
2014599773,66cyclictest24551-21taskset21:04:383
20145997722,49cyclictest6829-21idleruntime22:43:313
20145997722,48cyclictest7773-21fschecks_time23:53:253
20145997722,48cyclictest29047-21unixbench-2d23:28:413
20145997722,48cyclictest29047-21unixbench-2d23:28:413
2014599772,68cyclictest16896-21telnet19:43:303
2014499777,31cyclictest12889-21latency_hist20:43:152
2014499777,31cyclictest12889-21latency_hist20:43:152
2014499774,27cyclictest0-21swapper/222:58:272
20144997734,12cyclictest0-21swapper/218:48:352
2014599763,22cyclictest0-21swapper/322:29:423
20145997625,44cyclictest12852-21awk19:33:393
20145997624,46cyclictest18495-21munin-node20:53:333
20145997623,46cyclictest1369-21runrttasks18:48:043
20145997623,45cyclictest1369-21runrttasks19:32:333
20145997622,48cyclictest17778-21load21:58:363
20145997622,45cyclictest15432-21munin-node23:03:313
20145997621,47cyclictest1369-21runrttasks23:52:313
20145997620,48cyclictest1369-21runrttasks18:51:063
20145997616,53cyclictest0-21swapper/321:33:133
2014599753,65cyclictest6934-21crond19:23:173
2014599753,64cyclictest0-21swapper/323:23:353
2014599753,64cyclictest0-21swapper/320:29:233
2014599753,24cyclictest0-21swapper/322:15:443
2014599753,21cyclictest0-21swapper/320:06:323
2014599753,20cyclictest23431-21gltestperf23:18:283
20145997522,47cyclictest28771-21cpu22:23:263
20145997522,46cyclictest6485-21unixbench_singl21:33:453
20145997521,48cyclictest29117-21df_abs20:08:313
20145997521,48cyclictest0-21swapper/323:38:233
20145997521,47cyclictest20619-21cpuspeed_turbos20:58:283
20145997516,9cyclictest5268-21grep20:23:483
2014599743,64cyclictest1243-21snmpd22:04:483
2014599743,22cyclictest0-21swapper/320:51:173
2014599743,21cyclictest0-21swapper/321:48:073
20145997427,41cyclictest11019-21cut22:53:243
20145997425,43cyclictest14339-21needreboot20:43:423
20145997425,43cyclictest14339-21needreboot20:43:423
20145997424,44cyclictest1369-21runrttasks23:16:243
20145997417,8cyclictest5180-21unixbench-2d22:38:443
20145997417,8cyclictest1083-21aten_r1power_vo22:33:223
2014599733,63cyclictest0-21swapper/320:01:423
2014599733,63cyclictest0-21swapper/320:01:423
20145997329,38cyclictest3260-21tail19:13:383
20145997313,8cyclictest2859-21unixbench_multi20:18:503
2014499734,26cyclictest0-21swapper/200:08:322
2014499734,26cyclictest0-21swapper/200:08:322
243799720,6rtkit-daemon2436-21rtkit-daemon18:43:412
2014599723,63cyclictest0-21swapper/318:53:543
20145997222,43cyclictest22640-21missed_timers19:53:403
2014599713,27cyclictest9444-21munin-node23:58:403
20145997124,41cyclictest1369-21runrttasks19:27:173
20145997120,44cyclictest15760-21rt-features19:38:483
2014599703,20cyclictest0-21swapper/321:13:323
2014599693,60cyclictest0-21swapper/319:48:303
2014599693,21cyclictest0-21swapper/322:09:313
251502650,2sleep1201ktimersoftd/121:08:271
2014399654,52cyclictest0-21swapper/120:13:411
62612613,49sleep00-21swapper/023:48:420
2014599613,27cyclictest20170-21cat18:43:193
270732603,12sleep00-21swapper/018:55:360
243799600,4rtkit-daemon2436-21rtkit-daemon19:06:482
2013899604,38cyclictest0-21swapper/021:14:400
286382594,48sleep00-21swapper/023:28:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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