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2025-12-16 - 20:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 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 rackbslot8s (updated Tue Dec 16, 2025 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23171292126111,10sleep30-21swapper/307:09:583
2316962212698,9sleep60-21swapper/607:07:376
23171202124110,9sleep50-21swapper/507:09:525
23169022124109,9sleep20-21swapper/207:06:442
23171102123108,10sleep40-21swapper/407:09:424
23170572123107,10sleep70-21swapper/707:08:577
23169662123108,10sleep10-21swapper/107:07:391
23170122120106,9sleep00-21swapper/007:08:180
2317385991030,100cyclictest0-21swapper/412:35:044
2317385991030,100cyclictest0-21swapper/411:47:564
231739299102100,2cyclictest556-21snmpd12:08:456
23173809910297,4cyclictest556-21snmpd10:37:483
231737699102100,2cyclictest0-21swapper/209:15:432
23173719910299,3cyclictest556-21snmpd11:02:341
2317371991020,100cyclictest0-21swapper/111:42:531
2317396991010,0cyclictest0-21swapper/712:26:407
23173929910199,2cyclictest556-21snmpd12:12:006
2317392991010,100cyclictest0-21swapper/610:21:146
23173899910199,2cyclictest556-21snmpd12:30:565
23173899910199,2cyclictest556-21snmpd11:23:135
23173899910199,2cyclictest556-21snmpd09:48:375
231738999101100,1cyclictest556-21snmpd10:44:155
2317389991010,100cyclictest0-21swapper/510:52:305
23173859910199,2cyclictest556-21snmpd11:01:074
23173859910199,2cyclictest556-21snmpd10:38:334
23173859910198,3cyclictest556-21snmpd09:47:014
23173859910198,3cyclictest556-21snmpd08:45:024
23173859910198,3cyclictest2463338-21cat10:30:134
23173809910199,2cyclictest556-21snmpd08:48:503
23173809910199,2cyclictest556-21snmpd07:47:213
23173809910199,2cyclictest556-21snmpd07:33:093
23173809910198,3cyclictest556-21snmpd09:35:133
231738099101100,1cyclictest556-21snmpd11:23:313
23173769910199,2cyclictest2477650-21kworker/2:211:04:032
23173769910199,2cyclictest0-21swapper/209:55:552
23173769910199,2cyclictest0-21swapper/209:50:282
231737699101100,1cyclictest0-21swapper/208:05:502
231737699101100,1cyclictest0-21swapper/208:05:492
231737699101100,1cyclictest0-21swapper/208:00:012
23173719910199,2cyclictest556-21snmpd10:13:261
23173719910199,2cyclictest2374888-21cat09:00:141
2317371991010,101cyclictest0-21swapper/112:16:121
2317371991010,0cyclictest0-21swapper/107:36:301
2317396991000,99cyclictest0-21swapper/712:20:547
2317396991000,99cyclictest0-21swapper/711:43:267
2317396991000,99cyclictest0-21swapper/710:01:147
2317396991000,99cyclictest0-21swapper/709:56:167
2317396991000,99cyclictest0-21swapper/709:18:547
2317396991000,99cyclictest0-21swapper/708:54:087
2317396991000,99cyclictest0-21swapper/707:33:217
2317396991000,100cyclictest0-21swapper/711:02:467
2317396991000,100cyclictest0-21swapper/710:24:147
2317396991000,0cyclictest0-21swapper/707:13:477
23173929910099,1cyclictest556-21snmpd11:57:126
23173929910099,1cyclictest556-21snmpd11:30:116
23173929910099,1cyclictest556-21snmpd10:12:206
23173929910099,1cyclictest556-21snmpd08:39:116
2317392991000,99cyclictest0-21swapper/609:45:226
2317392991000,99cyclictest0-21swapper/607:17:326
2317392991000,100cyclictest0-21swapper/610:15:156
23173899910099,1cyclictest556-21snmpd12:02:005
23173899910099,1cyclictest556-21snmpd09:30:475
23173899910099,1cyclictest556-21snmpd08:51:295
23173899910099,1cyclictest556-21snmpd07:56:225
23173899910099,1cyclictest556-21snmpd07:50:125
23173899910099,0cyclictest556-21snmpd11:19:285
23173899910098,2cyclictest556-21snmpd11:37:325
23173899910098,2cyclictest556-21snmpd07:45:215
2317389991000,99cyclictest0-21swapper/510:58:015
2317389991000,100cyclictest0-21swapper/510:30:425
23173859910099,1cyclictest556-21snmpd08:44:534
23173859910099,1cyclictest556-21snmpd08:04:014
23173859910099,1cyclictest556-21snmpd07:58:424
23173859910099,1cyclictest2380053-21cat09:10:154
23173859910097,3cyclictest556-21snmpd09:40:104
2317385991000,99cyclictest0-21swapper/411:30:444
2317385991000,99cyclictest0-21swapper/410:28:544
2317385991000,100cyclictest0-21swapper/411:55:164
2317385991000,100cyclictest0-21swapper/409:00:164
23173809910099,1cyclictest556-21snmpd12:06:453
23173809910099,1cyclictest556-21snmpd11:08:313
23173809910098,2cyclictest556-21snmpd10:47:123
23173809910098,2cyclictest556-21snmpd09:58:113
23173809910098,2cyclictest556-21snmpd09:12:303
23173809910098,2cyclictest556-21snmpd08:16:043
23173809910098,2cyclictest556-21snmpd07:17:563
23173809910098,1cyclictest593-21lldpd11:53:423
23173769910099,1cyclictest556-21snmpd08:33:422
23173769910099,1cyclictest2449069-21sh10:15:462
23173769910099,1cyclictest0-21swapper/210:49:572
23173769910099,1cyclictest0-21swapper/209:32:572
23173769910099,0cyclictest0-21swapper/210:01:072
23173769910098,2cyclictest2551411-21sshd11:55:082
23173769910098,2cyclictest2522438-21sh11:26:072
23173769910098,2cyclictest0-21swapper/211:06:562
23173769910098,2cyclictest0-21swapper/210:50:272
23173769910097,2cyclictest2419937-21ssh09:49:292
2317376991000,99cyclictest2577310-21apt-get12:20:092
2317376991000,99cyclictest2530636-21cpuspeed_turbos11:35:132
2317376991000,99cyclictest2413707-21ssh09:42:452
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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