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2026-04-04 - 15:38

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 Apr 04, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2991117212091,9sleep00-21swapper/007:08:030
29912222119105,9sleep30-21swapper/307:09:343
29909642119105,9sleep40-21swapper/407:05:504
29912032118104,9sleep20-21swapper/207:09:172
2991197211790,22sleep50-21swapper/507:09:125
2991145211687,10sleep10-21swapper/107:08:281
2990966211499,10sleep60-21swapper/607:05:526
2991012211096,9sleep70-21swapper/707:06:327
29915079910299,3cyclictest553-21snmpd09:56:516
29915079910299,3cyclictest553-21snmpd09:54:366
29915079910293,4cyclictest0-21swapper/611:17:456
2991507991020,101cyclictest0-21swapper/609:36:066
2991503991020,1cyclictest0-21swapper/508:40:045
29914929910299,3cyclictest553-21snmpd07:16:012
2991492991020,101cyclictest0-21swapper/211:10:302
29914849910299,2cyclictest553-21snmpd09:29:030
29914849910299,2cyclictest553-21snmpd09:29:020
2991511991010,101cyclictest0-21swapper/707:40:567
2991511991010,100cyclictest0-21swapper/710:58:297
29915079910199,2cyclictest553-21snmpd10:52:266
29915079910199,2cyclictest553-21snmpd08:14:036
29915079910198,3cyclictest553-21snmpd12:19:416
29915079910198,3cyclictest553-21snmpd09:23:266
29915079910197,4cyclictest553-21snmpd09:42:036
2991507991010,101cyclictest0-21swapper/607:55:306
2991507991010,100cyclictest0-21swapper/611:42:016
2991507991010,100cyclictest0-21swapper/609:00:356
29915039910199,2cyclictest553-21snmpd10:23:135
29915039910199,2cyclictest553-21snmpd09:21:145
29915039910199,2cyclictest553-21snmpd08:04:155
29915039910197,3cyclictest553-21snmpd11:29:395
2991503991010,100cyclictest0-21swapper/509:45:545
2991503991010,0cyclictest0-21swapper/511:53:255
2991503991010,0cyclictest0-21swapper/507:25:155
29915019910199,2cyclictest2992551-21cat07:10:144
29915019910199,1cyclictest553-21snmpd07:16:534
29914969910199,2cyclictest553-21snmpd09:37:513
29914969910199,2cyclictest553-21snmpd09:29:543
29914969910199,2cyclictest553-21snmpd09:29:543
29914969910199,1cyclictest553-21snmpd10:39:343
29914929910199,2cyclictest553-21snmpd11:17:032
29914929910198,3cyclictest553-21snmpd08:14:182
29914879910199,2cyclictest553-21snmpd11:35:161
299148799101100,1cyclictest553-21snmpd10:32:311
2991487991010,100cyclictest0-21swapper/112:34:091
2991487991010,100cyclictest0-21swapper/111:50:581
2991487991010,100cyclictest0-21swapper/111:01:261
2991487991010,100cyclictest0-21swapper/109:52:091
2991487991010,100cyclictest0-21swapper/108:49:131
2991487991010,100cyclictest0-21swapper/108:04:001
29914849910199,2cyclictest553-21snmpd12:21:200
29914849910199,1cyclictest553-21snmpd11:47:100
2991484991010,100cyclictest0-21swapper/012:30:140
2991484991010,100cyclictest0-21swapper/010:40:170
2991511991000,99cyclictest0-21swapper/709:37:337
2991511991000,99cyclictest0-21swapper/708:16:337
2991511991000,99cyclictest0-21swapper/708:05:037
2991511991000,99cyclictest0-21swapper/708:02:267
2991511991000,99cyclictest0-21swapper/707:39:527
2991511991000,100cyclictest0-21swapper/712:38:337
2991511991000,100cyclictest0-21swapper/711:31:397
2991511991000,100cyclictest0-21swapper/710:45:107
2991511991000,100cyclictest0-21swapper/710:37:057
2991511991000,100cyclictest0-21swapper/710:24:287
2991511991000,100cyclictest0-21swapper/710:01:467
29915079910099,1cyclictest553-21snmpd12:39:546
29915079910099,1cyclictest553-21snmpd07:36:206
29915079910098,2cyclictest553-21snmpd08:49:256
2991507991000,100cyclictest0-21swapper/612:13:566
2991507991000,100cyclictest0-21swapper/610:14:496
29915039910099,1cyclictest553-21snmpd09:15:415
29915039910099,1cyclictest553-21snmpd08:23:525
29915039910098,2cyclictest553-21snmpd11:05:465
29915039910098,2cyclictest553-21snmpd09:30:545
2991503991000,98cyclictest0-21swapper/510:07:135
2991503991000,100cyclictest0-21swapper/512:06:415
2991503991000,100cyclictest0-21swapper/512:01:505
2991503991000,100cyclictest0-21swapper/509:42:155
29915019910099,1cyclictest553-21snmpd07:23:474
29915019910099,1cyclictest3178134-21cat11:00:154
29915019910098,2cyclictest553-21snmpd09:14:534
2991501991000,99cyclictest0-21swapper/412:39:064
29914969910099,1cyclictest553-21snmpd11:58:463
29914969910099,1cyclictest553-21snmpd11:40:313
29914969910099,1cyclictest553-21snmpd10:59:263
29914969910099,1cyclictest553-21snmpd10:21:193
29914969910099,1cyclictest553-21snmpd08:17:153
29914969910099,1cyclictest553-21snmpd07:23:383
29914969910098,2cyclictest553-21snmpd11:08:393
29914969910098,1cyclictest553-21snmpd11:37:433
29914969910098,1cyclictest553-21snmpd10:33:493
29914929910099,1cyclictest0-21swapper/209:32:382
29914929910098,2cyclictest553-21snmpd12:25:232
29914929910098,2cyclictest0-21swapper/209:57:162
29914929910098,1cyclictest553-21snmpd11:57:582
29914929910097,3cyclictest553-21snmpd10:16:192
2991492991000,99cyclictest0-21swapper/212:35:542
2991492991000,99cyclictest0-21swapper/210:37:232
2991492991000,100cyclictest0-21swapper/210:00:362
29914879910099,1cyclictest553-21snmpd12:37:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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