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2026-05-19 - 20:30

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 May 19, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26042962121106,10sleep60-21swapper/607:07:286
26042382120106,9sleep40-21swapper/407:06:384
26042662118104,9sleep30-21swapper/307:07:013
2604218211499,10sleep20-21swapper/207:06:202
2604373211399,9sleep70-21swapper/707:08:337
2604263211399,9sleep00-21swapper/007:06:580
2604165211297,10sleep50-21swapper/507:05:345
2604358210893,10sleep10-21swapper/107:08:201
260470799103100,3cyclictest553-21snmpd09:51:232
26046989910399,3cyclictest2797507-21ssh11:06:240
26047199910299,3cyclictest553-21snmpd12:24:105
2604719991020,102cyclictest0-21swapper/510:17:465
26047109910299,3cyclictest553-21snmpd11:35:273
26047109910299,2cyclictest553-21snmpd09:13:053
26047079910298,4cyclictest2695159-21cat09:35:142
2604707991020,100cyclictest0-21swapper/207:21:002
2604726991010,100cyclictest0-21swapper/712:00:007
2604726991010,100cyclictest0-21swapper/708:47:347
26047199910199,2cyclictest553-21snmpd07:35:265
26047199910198,3cyclictest553-21snmpd10:29:275
2604719991010,101cyclictest0-21swapper/510:53:535
2604719991010,101cyclictest0-21swapper/508:02:335
2604719991010,100cyclictest0-21swapper/511:08:185
26047159910199,2cyclictest553-21snmpd10:44:414
26047159910199,2cyclictest553-21snmpd09:59:194
26047109910199,2cyclictest553-21snmpd07:36:533
26047109910197,4cyclictest553-21snmpd12:09:073
260471099101100,1cyclictest553-21snmpd09:44:393
26047079910197,4cyclictest553-21snmpd11:13:092
2604707991010,101cyclictest0-21swapper/210:31:132
2604707991010,100cyclictest0-21swapper/209:24:172
26046989910199,2cyclictest553-21snmpd09:14:200
26046989910198,3cyclictest553-21snmpd10:36:470
2604698991010,0cyclictest0-21swapper/010:26:160
2604698991010,0cyclictest0-21swapper/010:14:070
26047269910098,2cyclictest0-21swapper/710:44:357
2604726991000,99cyclictest0-21swapper/711:35:297
2604726991000,99cyclictest0-21swapper/708:31:257
2604726991000,1cyclictest0-21swapper/711:14:517
26047219910099,1cyclictest553-21snmpd11:42:436
26047219910099,1cyclictest553-21snmpd11:06:296
26047219910099,1cyclictest553-21snmpd10:16:136
26047219910099,1cyclictest553-21snmpd09:34:366
26047219910099,1cyclictest2801576-21cat11:10:156
2604721991000,100cyclictest0-21swapper/609:55:456
2604721991000,100cyclictest0-21swapper/608:26:596
26047199910099,1cyclictest553-21snmpd11:47:075
26047199910099,1cyclictest553-21snmpd09:04:295
26047199910099,1cyclictest1880257-21ntpd10:21:235
26047199910098,2cyclictest553-21snmpd12:15:195
26047199910098,1cyclictest553-21snmpd11:22:275
26047199910097,3cyclictest553-21snmpd09:26:235
26047199910097,3cyclictest553-21snmpd09:26:235
2604719991000,99cyclictest0-21swapper/511:34:205
2604719991000,99cyclictest0-21swapper/511:29:145
2604719991000,99cyclictest0-21swapper/509:57:155
26047159910099,1cyclictest553-21snmpd11:38:424
26047159910099,1cyclictest553-21snmpd11:24:504
26047159910099,1cyclictest553-21snmpd08:31:194
26047159910099,1cyclictest553-21snmpd07:54:524
26047159910099,1cyclictest553-21snmpd07:16:074
26047159910099,1cyclictest2684034-21cat09:25:154
26047159910099,1cyclictest2684034-21cat09:25:154
26047159910098,2cyclictest553-21snmpd12:09:164
26047159910098,2cyclictest553-21snmpd10:56:584
26047159910098,1cyclictest553-21snmpd10:26:064
2604715991000,99cyclictest0-21swapper/410:36:594
2604715991000,99cyclictest0-21swapper/409:37:054
2604715991000,100cyclictest0-21swapper/411:56:154
2604715991000,100cyclictest0-21swapper/409:53:184
2604715991000,100cyclictest0-21swapper/409:44:124
2604715991000,100cyclictest0-21swapper/408:41:544
2604715991000,0cyclictest0-21swapper/412:16:174
26047109910099,1cyclictest553-21snmpd12:25:443
26047109910099,1cyclictest553-21snmpd11:33:183
26047109910099,1cyclictest553-21snmpd09:46:033
26047109910099,1cyclictest553-21snmpd07:40:533
26047109910099,1cyclictest553-21snmpd07:13:223
26047109910098,2cyclictest553-21snmpd08:46:553
26047079910099,1cyclictest553-21snmpd11:01:172
26047079910099,1cyclictest553-21snmpd10:07:522
26047079910099,1cyclictest553-21snmpd09:16:202
26047079910099,1cyclictest553-21snmpd08:52:072
26047079910099,1cyclictest553-21snmpd07:25:312
26047079910099,1cyclictest2621558-21cat07:40:132
26047079910099,1cyclictest0-21swapper/210:03:432
26047079910098,2cyclictest553-21snmpd12:28:472
26047079910098,2cyclictest553-21snmpd09:27:142
26047079910098,2cyclictest553-21snmpd09:27:132
2604707991000,99cyclictest0-21swapper/212:04:082
2604707991000,100cyclictest0-21swapper/211:28:242
2604707991000,100cyclictest0-21swapper/208:20:242
26047029910099,1cyclictest553-21snmpd12:27:171
26047029910099,1cyclictest553-21snmpd09:48:001
26047029910099,1cyclictest553-21snmpd09:33:211
26047029910099,1cyclictest553-21snmpd08:12:231
26047029910099,1cyclictest2818103-21cat11:25:151
2604702991000,99cyclictest0-21swapper/112:00:151
2604702991000,99cyclictest0-21swapper/109:52:531
2604702991000,99cyclictest0-21swapper/108:07:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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