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2026-04-14 - 21:55

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 Apr 14, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9818272118104,9sleep60-21swapper/607:06:416
9818752117102,10sleep70-21swapper/707:07:227
9819082116101,10sleep30-21swapper/307:07:513
9819152114101,8sleep10-21swapper/107:07:561
9818162114100,9sleep40-21swapper/407:06:314
981841211399,9sleep20-21swapper/207:06:522
981747211297,10sleep00-21swapper/007:05:300
981873210894,9sleep50-21swapper/507:07:215
982295991030,100cyclictest0-21swapper/212:38:062
9823059910299,2cyclictest553-21snmpd11:48:555
982302991020,101cyclictest0-21swapper/409:22:294
9822959910299,3cyclictest553-21snmpd10:18:582
982295991020,99cyclictest0-21swapper/208:32:382
9822919910299,3cyclictest553-21snmpd10:48:161
9822919910299,3cyclictest553-21snmpd08:52:531
9822919910299,2cyclictest1192576-21cat11:25:171
982314991010,99cyclictest0-21swapper/711:33:017
9823109910199,2cyclictest553-21snmpd10:41:046
982302991010,101cyclictest0-21swapper/411:05:214
982302991010,101cyclictest0-21swapper/409:55:154
982302991010,100cyclictest0-21swapper/410:15:154
9822989910199,2cyclictest553-21snmpd12:34:533
9822989910199,2cyclictest553-21snmpd09:47:123
9822989910199,2cyclictest553-21snmpd07:36:293
9822989910198,2cyclictest553-21snmpd11:55:313
9822959910199,2cyclictest553-21snmpd08:53:592
9822959910199,2cyclictest553-21snmpd07:46:152
9822959910198,3cyclictest553-21snmpd11:18:532
9822959910198,3cyclictest553-21snmpd11:18:532
982295991010,99cyclictest0-21swapper/208:20:412
982295991010,101cyclictest0-21swapper/210:33:452
982295991010,100cyclictest0-21swapper/211:04:542
982295991010,100cyclictest0-21swapper/208:06:222
9822919910199,2cyclictest553-21snmpd12:26:231
9822919910199,2cyclictest553-21snmpd10:15:511
9822919910198,3cyclictest553-21snmpd12:10:401
9822919910198,3cyclictest553-21snmpd11:38:461
9822919910197,3cyclictest553-21snmpd10:23:241
9822869910199,2cyclictest0-21swapper/011:35:280
98228699101100,1cyclictest553-21snmpd10:17:030
982286991010,100cyclictest0-21swapper/012:37:030
982286991010,100cyclictest0-21swapper/009:25:150
982314991000,99cyclictest0-21swapper/708:56:137
982314991000,100cyclictest0-21swapper/708:02:137
982314991000,0cyclictest0-21swapper/709:55:367
9823109910099,1cyclictest553-21snmpd11:20:356
9823109910099,1cyclictest553-21snmpd11:20:356
9823109910099,1cyclictest553-21snmpd08:46:416
9823109910099,1cyclictest553-21snmpd08:21:436
9823109910099,1cyclictest553-21snmpd08:13:016
9823109910099,1cyclictest1121375-21cat10:20:146
98231099100100,0cyclictest553-21snmpd12:15:296
982310991000,99cyclictest0-21swapper/612:23:186
982310991000,99cyclictest0-21swapper/609:16:066
982310991000,98cyclictest0-21swapper/611:18:276
982310991000,98cyclictest0-21swapper/611:18:266
982310991000,100cyclictest0-21swapper/610:15:146
9823059910099,1cyclictest553-21snmpd10:54:465
9823059910099,1cyclictest553-21snmpd09:50:185
9823059910099,1cyclictest553-21snmpd09:11:005
982305991000,99cyclictest0-21swapper/507:40:145
982305991000,99cyclictest0-21swapper/507:14:515
982305991000,100cyclictest0-21swapper/510:48:115
9823029910099,1cyclictest570-21ntpd11:41:574
9823029910099,1cyclictest553-21snmpd10:51:074
9823029910099,1cyclictest553-21snmpd09:51:124
9823029910099,1cyclictest553-21snmpd09:40:404
9823029910099,1cyclictest553-21snmpd08:30:294
9823029910099,1cyclictest553-21snmpd08:25:414
9823029910099,1cyclictest553-21snmpd08:23:114
9823029910098,2cyclictest553-21snmpd09:29:224
982302991000,99cyclictest0-21swapper/410:25:094
982302991000,99cyclictest0-21swapper/410:01:444
982302991000,99cyclictest0-21swapper/407:49:484
982302991000,100cyclictest0-21swapper/407:15:024
9822989910099,1cyclictest553-21snmpd12:25:053
9822989910099,1cyclictest553-21snmpd10:45:443
9822989910099,1cyclictest553-21snmpd09:22:083
9822989910099,1cyclictest553-21snmpd08:39:023
9822959910099,1cyclictest553-21snmpd12:24:412
9822959910099,1cyclictest553-21snmpd10:57:162
9822959910099,1cyclictest553-21snmpd09:36:472
9822959910099,1cyclictest553-21snmpd09:25:312
9822959910099,1cyclictest553-21snmpd07:20:022
9822959910099,1cyclictest553-21snmpd07:18:322
9822959910097,3cyclictest553-21snmpd09:04:452
982295991000,99cyclictest0-21swapper/211:20:362
982295991000,99cyclictest0-21swapper/211:20:362
982295991000,99cyclictest0-21swapper/210:54:432
982295991000,99cyclictest0-21swapper/208:46:362
982295991000,100cyclictest0-21swapper/211:59:372
9822919910099,1cyclictest553-21snmpd11:01:261
9822919910099,1cyclictest553-21snmpd08:48:031
9822919910099,1cyclictest553-21snmpd08:00:031
9822919910098,2cyclictest553-21snmpd12:39:361
9822919910098,2cyclictest553-21snmpd11:31:211
9822919910098,2cyclictest553-21snmpd07:30:111
982291991000,99cyclictest0-21swapper/107:42:151
982291991000,100cyclictest0-21swapper/112:33:091
982291991000,100cyclictest0-21swapper/111:20:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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