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2026-04-20 - 22:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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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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 rack5slot3s.osadl.org (updated Mon Apr 20, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
152052246158,39sleep20-21swapper/207:09:362
149542240166,24sleep10-21swapper/107:06:221
150022201164,24sleep30-21swapper/307:07:003
149892201163,26sleep00-21swapper/007:06:500
2690721440,3sleep11532099cyclictest10:00:141
15325996865,2cyclictest0-21swapper/209:27:432
295752590,3sleep21532599cyclictest07:40:132
69772580,3sleep00-21swapper/008:00:220
178642500,3sleep11532099cyclictest08:25:191
88682410,1sleep20-21swapper/211:45:232
1532599371,13cyclictest4025-21diskmemload10:07:022
87162330,2sleep01530999cyclictest09:20:130
1530999339,11cyclictest23802-21idleruntime-cro09:55:010
1530999325,12cyclictest28226-21awk10:05:010
1532599311,11cyclictest0-21swapper/208:23:462
1530999313,13cyclictest32609-21munin-run10:15:010
1532599301,13cyclictest0-21swapper/207:40:012
1532599291,12cyclictest0-21swapper/211:38:582
1532599291,11cyclictest0-21swapper/209:04:012
1532599291,10cyclictest0-21swapper/207:57:462
1532599290,12cyclictest0-21swapper/207:54:542
1530999291,13cyclictest18467-21munin-run12:10:010
1530999291,13cyclictest18467-21munin-run12:10:010
1532599281,11cyclictest0-21swapper/212:09:142
1532599281,11cyclictest0-21swapper/212:09:142
1532599280,12cyclictest0-21swapper/212:24:012
1533099278,6cyclictest18044-40dnf08:25:253
1532599271,11cyclictest11303-21ntp_states08:10:222
1532599271,11cyclictest0-21swapper/209:06:292
1532599271,10cyclictest0-21swapper/211:16:372
1532599271,10cyclictest0-21swapper/208:53:492
1532599270,12cyclictest0-21swapper/210:51:572
1530999271,13cyclictest31371-21munin-run07:45:010
1532599268,10cyclictest15349-21ntp_offset12:00:222
1532599261,11cyclictest0-21swapper/207:25:052
1532599261,10cyclictest0-21swapper/211:44:302
1532599261,10cyclictest0-21swapper/210:34:092
1532599261,10cyclictest0-21swapper/209:59:382
1532599260,2cyclictest0-21swapper/211:25:292
1532599260,12cyclictest0-21swapper/210:41:532
1532599260,10cyclictest0-21swapper/207:33:292
15320992620,3cyclictest20666-21munin-run12:15:011
1530999267,16cyclictest826-21munin-run11:30:010
1530999261,11cyclictest9200-21grep11:45:250
1530999260,10cyclictest5869-21needreboot10:25:200
167592251,20sleep016845-21needreboot10:50:200
1533099253,18cyclictest27037-40dnf12:27:243
1532599251,9cyclictest4025-21diskmemload10:48:132
1532599251,9cyclictest0-21swapper/212:27:492
1532599251,9cyclictest0-21swapper/211:03:172
1532599251,4cyclictest0-21swapper/209:52:532
1532599251,13cyclictest0-21swapper/211:30:142
1532599251,10cyclictest0-21swapper/208:43:132
1532599251,10cyclictest0-21swapper/208:17:262
1532599250,9cyclictest0-21swapper/209:15:492
1532599250,8cyclictest0-21swapper/210:55:132
1532599250,8cyclictest0-21swapper/210:55:132
1532599250,10cyclictest0-21swapper/209:14:012
1532599250,10cyclictest0-21swapper/208:32:062
1532599250,10cyclictest0-21swapper/207:23:092
1532099254,3cyclictest21-21rcuc/107:54:061
15320992516,2cyclictest23061-21awk09:50:231
1530999251,10cyclictest3050-21strings09:05:200
1530999250,12cyclictest30423-21awk10:10:010
1533099243,9cyclictest0-21swapper/311:37:033
1533099241,11cyclictest28398-21memory12:30:203
1533099240,6cyclictest0-21swapper/311:03:013
1532599241,9cyclictest0-21swapper/207:49:062
1532599241,9cyclictest0-21swapper/207:15:092
1532599241,10cyclictest0-21swapper/212:37:332
1532599241,10cyclictest0-21swapper/212:11:012
1532599240,9cyclictest0-21swapper/209:23:052
15320992417,4cyclictest5176-21memory09:10:201
1530999241,10cyclictest10265-21grep10:35:210
1533099234,10cyclictest18535-21grep10:55:153
1533099234,10cyclictest18535-21grep10:55:153
1533099231,6cyclictest0-21swapper/312:03:143
1533099231,6cyclictest0-21swapper/311:49:443
1533099231,6cyclictest0-21swapper/311:44:243
1533099231,13cyclictest0-21swapper/311:05:163
1533099230,6cyclictest0-21swapper/312:05:423
1533099230,6cyclictest0-21swapper/312:05:423
1533099230,11cyclictest0-21swapper/310:05:293
1532599237,2cyclictest0-21swapper/209:48:062
1532599237,2cyclictest0-21swapper/209:48:062
1532599231,9cyclictest0-21swapper/209:35:462
1532599231,9cyclictest0-21swapper/208:49:572
1532599231,10cyclictest0-21swapper/211:51:302
1532599231,10cyclictest0-21swapper/208:25:262
1532599230,8cyclictest0-21swapper/210:25:212
1532599230,11cyclictest0-21swapper/208:39:332
1532599230,10cyclictest0-21swapper/210:15:342
1532599230,10cyclictest0-21swapper/209:41:022
1532599230,10cyclictest0-21swapper/208:07:182
1532599230,10cyclictest0-21swapper/207:13:182
1532099239,4cyclictest29750-21diskstats07:40:161
15320992317,3cyclictest21324-21ntp_states11:00:181
15320992317,3cyclictest20954-21df_inode07:20:131
15320992317,3cyclictest18756-21df_inode07:15:131
1532099231,4cyclictest10530-21expr08:10:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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