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2026-07-27 - 08:53

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 Mon Jul 27, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39526932123109,9sleep70-21swapper/719:09:567
39526932123109,9sleep70-21swapper/719:09:567
39526812118103,10sleep40-21swapper/419:09:454
39526812118103,10sleep40-21swapper/419:09:444
39523922117102,10sleep20-21swapper/219:05:332
39523922117102,10sleep20-21swapper/219:05:332
39524402115100,10sleep50-21swapper/519:06:175
39524402115100,10sleep50-21swapper/519:06:175
39525032114100,9sleep30-21swapper/319:07:113
39525032114100,9sleep30-21swapper/319:07:103
3952584211298,9sleep10-21swapper/119:08:211
3952584211298,9sleep10-21swapper/119:08:201
3952621211096,9sleep00-21swapper/019:08:530
3952621211096,9sleep00-21swapper/019:08:520
3952414210894,9sleep60-21swapper/619:05:546
3952414210894,9sleep60-21swapper/619:05:546
3952958991020,100cyclictest0-21swapper/720:06:317
3952939991020,1cyclictest0-21swapper/223:06:592
3952939991020,101cyclictest0-21swapper/223:31:182
3952939991020,101cyclictest0-21swapper/219:15:522
3952934991020,102cyclictest0-21swapper/123:30:481
3952934991020,100cyclictest0-21swapper/122:23:451
3952934991020,0cyclictest0-21swapper/123:03:141
3952958991010,1cyclictest0-21swapper/723:46:007
3952958991010,101cyclictest0-21swapper/720:46:047
3952958991010,100cyclictest0-21swapper/722:56:417
3952958991010,100cyclictest0-21swapper/722:11:227
3952958991010,100cyclictest0-21swapper/700:14:227
3952958991010,100cyclictest0-21swapper/700:02:197
39529519910199,2cyclictest553-21snmpd23:17:335
39529519910199,2cyclictest553-21snmpd23:17:335
39529519910199,1cyclictest553-21snmpd00:18:275
395295199101100,1cyclictest553-21snmpd23:38:155
3952951991010,100cyclictest0-21swapper/523:57:195
39529479910199,2cyclictest553-21snmpd23:48:544
3952947991010,100cyclictest0-21swapper/421:31:024
3952947991010,100cyclictest0-21swapper/421:08:554
39529429910199,2cyclictest553-21snmpd00:16:103
39529399910199,2cyclictest553-21snmpd19:28:192
3952939991010,101cyclictest0-21swapper/222:43:412
3952939991010,100cyclictest0-21swapper/223:29:152
39529349910199,2cyclictest553-21snmpd19:29:061
39529349910198,3cyclictest553-21snmpd23:56:281
3952934991010,99cyclictest0-21swapper/119:50:101
3952934991010,101cyclictest0-21swapper/122:03:441
3952934991010,100cyclictest0-21swapper/122:33:151
3952934991010,100cyclictest0-21swapper/100:37:321
395293099101100,1cyclictest553-21snmpd19:24:420
3952958991000,99cyclictest0-21swapper/721:20:047
3952958991000,99cyclictest0-21swapper/719:45:227
3952958991000,1cyclictest0-21swapper/722:36:437
3952958991000,100cyclictest0-21swapper/722:22:557
3952958991000,100cyclictest0-21swapper/700:06:557
39529539910099,1cyclictest553-21snmpd22:25:436
39529539910099,1cyclictest553-21snmpd21:26:236
39529539910099,1cyclictest553-21snmpd21:22:106
39529539910099,1cyclictest553-21snmpd00:31:056
39529539910098,2cyclictest553-21snmpd23:20:266
39529539910098,2cyclictest553-21snmpd21:45:296
3952953991000,99cyclictest0-21swapper/623:01:056
3952953991000,99cyclictest0-21swapper/622:13:546
3952953991000,100cyclictest0-21swapper/622:51:266
3952953991000,100cyclictest0-21swapper/622:40:036
39529519910099,1cyclictest553-21snmpd23:50:005
39529519910099,1cyclictest553-21snmpd20:34:215
39529519910099,1cyclictest553-21snmpd19:48:505
39529519910099,1cyclictest553-21snmpd19:32:075
39529519910098,2cyclictest553-21snmpd23:20:175
39529519910098,2cyclictest0-21swapper/521:26:055
39529519910098,2cyclictest0-21swapper/521:11:495
3952951991000,99cyclictest0-21swapper/523:40:395
3952951991000,99cyclictest0-21swapper/521:24:075
3952951991000,99cyclictest0-21swapper/520:25:445
3952951991000,99cyclictest0-21swapper/519:57:115
3952951991000,100cyclictest0-21swapper/519:29:075
39529479910099,1cyclictest553-21snmpd22:46:414
39529479910099,1cyclictest553-21snmpd22:19:074
39529479910099,1cyclictest553-21snmpd21:37:474
39529479910099,1cyclictest553-21snmpd19:37:274
39529479910099,1cyclictest553-21snmpd19:25:584
395294799100100,0cyclictest553-21snmpd23:09:404
3952947991000,99cyclictest0-21swapper/422:34:094
3952947991000,99cyclictest0-21swapper/420:58:044
3952947991000,99cyclictest0-21swapper/419:23:554
3952947991000,99cyclictest0-21swapper/400:20:314
3952947991000,100cyclictest0-21swapper/420:25:144
3952947991000,100cyclictest0-21swapper/420:15:424
39529429910099,1cyclictest553-21snmpd22:24:193
39529429910099,1cyclictest553-21snmpd21:46:513
39529429910099,1cyclictest553-21snmpd20:52:463
39529429910099,1cyclictest553-21snmpd20:25:123
39529399910099,1cyclictest553-21snmpd22:52:052
39529399910099,1cyclictest553-21snmpd22:05:152
39529399910099,1cyclictest553-21snmpd21:05:542
39529399910099,1cyclictest553-21snmpd20:38:512
39529399910099,1cyclictest553-21snmpd19:45:292
39529399910098,2cyclictest553-21snmpd23:41:472
3952939991000,99cyclictest0-21swapper/223:03:342
3952939991000,99cyclictest0-21swapper/221:00:522
3952939991000,99cyclictest0-21swapper/220:58:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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