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2026-07-11 - 21:31

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 Sat Jul 11, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12173429919395,98cyclictest0-21swapper/607:24:216
1217071212999,10sleep00-21swapper/007:09:390
12170182121107,9sleep30-21swapper/307:08:543
12170032118103,10sleep60-21swapper/607:08:416
12168862117102,10sleep10-21swapper/107:07:011
1217001211298,9sleep40-21swapper/407:08:394
1216925210894,9sleep20-21swapper/207:07:332
1214979210691,10sleep50-21swapper/507:05:035
1216894210590,10sleep70-21swapper/707:07:067
1217342991040,100cyclictest0-21swapper/611:41:596
1217346991020,100cyclictest0-21swapper/711:05:027
1217346991020,100cyclictest0-21swapper/709:50:527
12173319910299,3cyclictest553-21snmpd09:15:213
12173279910299,3cyclictest553-21snmpd10:22:472
12173279910299,3cyclictest553-21snmpd10:22:472
121732799102100,2cyclictest553-21snmpd11:21:532
1217327991020,99cyclictest0-21swapper/209:47:262
121732299102100,2cyclictest553-21snmpd12:05:451
1217318991020,1cyclictest0-21swapper/010:48:360
1217346991010,99cyclictest0-21swapper/707:10:557
1217346991010,101cyclictest0-21swapper/709:37:227
1217346991010,100cyclictest0-21swapper/712:14:197
1217346991010,100cyclictest0-21swapper/711:42:057
1217346991010,0cyclictest0-21swapper/707:36:177
12173429910198,2cyclictest605-21lldpd11:55:286
1217342991010,101cyclictest0-21swapper/609:42:496
1217342991010,100cyclictest0-21swapper/607:12:226
12173389910199,2cyclictest553-21snmpd11:56:215
12173389910199,1cyclictest553-21snmpd08:03:545
12173359910199,2cyclictest553-21snmpd11:43:084
12173359910199,2cyclictest553-21snmpd09:23:124
1217335991010,100cyclictest0-21swapper/412:10:164
1217335991010,100cyclictest0-21swapper/408:04:544
12173319910199,2cyclictest553-21snmpd12:27:553
12173319910199,2cyclictest553-21snmpd11:36:233
12173319910199,2cyclictest553-21snmpd07:40:243
12173279910199,2cyclictest553-21snmpd09:41:432
1217327991010,0cyclictest0-21swapper/209:05:572
121732299101100,1cyclictest1453332-21cat11:45:171
12173189910199,2cyclictest553-21snmpd09:59:080
12173189910198,3cyclictest553-21snmpd09:49:100
12173189910198,3cyclictest553-21snmpd08:51:140
1217318991010,101cyclictest0-21swapper/009:26:330
121734699100100,0cyclictest0-21swapper/708:57:537
1217346991000,99cyclictest0-21swapper/711:50:457
1217346991000,99cyclictest0-21swapper/711:47:547
1217346991000,99cyclictest0-21swapper/709:44:407
1217346991000,97cyclictest0-21swapper/712:16:407
1217346991000,100cyclictest0-21swapper/711:04:437
1217346991000,100cyclictest0-21swapper/709:12:427
1217346991000,100cyclictest0-21swapper/708:32:557
12173429910099,1cyclictest553-21snmpd10:36:366
12173429910098,2cyclictest553-21snmpd08:13:136
1217342991000,99cyclictest0-21swapper/610:04:026
1217342991000,100cyclictest0-21swapper/610:50:156
1217342991000,100cyclictest0-21swapper/609:57:446
12173389910099,1cyclictest553-21snmpd12:04:335
12173389910099,1cyclictest553-21snmpd11:11:045
12173389910099,1cyclictest553-21snmpd10:30:545
12173389910099,1cyclictest553-21snmpd09:14:155
12173389910099,1cyclictest553-21snmpd07:21:325
1217338991000,99cyclictest0-21swapper/512:25:155
1217338991000,99cyclictest0-21swapper/510:23:145
1217338991000,99cyclictest0-21swapper/510:23:145
1217338991000,99cyclictest0-21swapper/509:15:185
1217338991000,100cyclictest0-21swapper/509:40:555
12173359910099,1cyclictest553-21snmpd11:30:174
12173359910099,1cyclictest553-21snmpd10:30:364
12173359910099,1cyclictest553-21snmpd08:26:104
12173359910099,1cyclictest553-21snmpd07:55:304
12173359910099,1cyclictest553-21snmpd07:46:244
12173359910099,1cyclictest553-21snmpd07:43:064
12173359910099,0cyclictest553-21snmpd11:54:304
12173359910098,2cyclictest553-21snmpd11:38:414
1217335991000,99cyclictest0-21swapper/409:40:224
1217335991000,99cyclictest0-21swapper/409:39:584
1217335991000,99cyclictest0-21swapper/409:33:014
1217335991000,99cyclictest0-21swapper/408:56:354
1217335991000,100cyclictest0-21swapper/412:15:434
1217335991000,100cyclictest0-21swapper/409:17:544
12173319910099,1cyclictest553-21snmpd11:50:573
12173319910099,1cyclictest553-21snmpd11:45:513
12173319910099,1cyclictest553-21snmpd09:52:293
12173319910099,1cyclictest553-21snmpd09:43:553
12173319910099,1cyclictest553-21snmpd08:42:173
12173319910098,2cyclictest553-21snmpd10:13:173
12173319910098,2cyclictest553-21snmpd09:07:243
12173319910098,2cyclictest553-21snmpd07:59:333
12173279910099,1cyclictest553-21snmpd09:57:262
12173279910099,1cyclictest553-21snmpd07:39:302
12173279910098,2cyclictest553-21snmpd08:40:112
12173279910098,1cyclictest553-21snmpd09:53:522
12173279910097,3cyclictest553-21snmpd08:38:442
1217327991000,100cyclictest0-21swapper/212:30:552
1217327991000,100cyclictest0-21swapper/212:11:272
1217327991000,100cyclictest0-21swapper/207:50:002
12173229910099,1cyclictest553-21snmpd11:04:191
12173229910099,1cyclictest553-21snmpd10:52:471
12173229910099,1cyclictest553-21snmpd10:21:111
12173229910099,1cyclictest553-21snmpd10:21:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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