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2026-05-15 - 18:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 376 highest latencies:
System rack9slot4s (updated Fri May 15, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
185359912161182,20cyclictest0-21swapper/007:25:150
173572597516,63sleep00-21swapper/007:20:200
182562520476,30sleep10-21swapper/107:22:411
432721010,8sleep01853599cyclictest12:25:270
285082950,4sleep0111rcuc/012:05:190
41702850,3sleep041ktimersoftd/011:00:220
310422540,29sleep00-21swapper/012:10:290
259282410,8sleep01853599cyclictest09:05:290
18535993914,13cyclictest0-21swapper/007:46:300
202502354,27sleep00-21swapper/008:50:270
66542341,28sleep06735-21python09:40:260
303532331,28sleep130377-21/usr/sbin/munin09:19:591
192632330,4sleep1201rcuc/107:25:191
1853599336,6cyclictest22947-21basename07:35:000
1853599331,7cyclictest81rcu_preempt09:45:400
1853599331,13cyclictest142042which10:00:270
1853599331,13cyclictest0-21swapper/009:57:340
18535993310,19cyclictest25976-21latency_hist12:00:010
241762322,26sleep124271-21users09:00:301
207022321,27sleep120709-21diskstats11:45:161
1853699324,25cyclictest552-21iostat_ios09:25:191
5122311,3sleep0546-21iostat09:25:170
34062311,4sleep13413-21diskstats12:25:131
208772311,5sleep10-21swapper/108:54:161
71632301,5sleep10-21swapper/109:42:121
311902301,4sleep10-21swapper/112:11:331
289272301,24sleep028936-21diskstats09:15:150
253612301,3sleep10-21swapper/110:30:261
1853699304,20cyclictest28154-21munin-run10:40:001
18536993018,7cyclictest9994-21unixbench_singl12:40:291
18536993014,12cyclictest22-21ksoftirqd/110:57:011
1853599307,8cyclictest21073-21diskstats10:20:140
18535993022,5cyclictest0-21swapper/008:55:090
1853599301,5cyclictest81rcu_preempt08:25:000
1853599301,4cyclictest81rcu_preempt11:09:110
1853599301,14cyclictest4210-21fschecks_count09:35:150
149162301,5sleep10-21swapper/110:04:361
88202291,5sleep00-21swapper/011:13:480
86622291,24sleep10-21swapper/111:12:061
84992291,5sleep00-21swapper/012:39:090
60522291,5sleep00-21swapper/008:15:090
31522291,5sleep00-21swapper/010:58:390
305632291,4sleep10-21swapper/107:53:321
297312291,5sleep00-21swapper/010:42:050
296122291,5sleep10-21swapper/112:09:401
220312291,5sleep00-21swapper/011:49:020
1853699294,18cyclictest25182-21diskstats09:05:161
1853699292,23cyclictest0-21swapper/112:35:081
1853599292,14cyclictest2146-21diskstats09:30:140
1853599292,13cyclictest15775-21diskstats08:40:150
1853599291,4cyclictest81rcu_preempt12:41:100
1853599291,4cyclictest81rcu_preempt11:50:020
1853599291,4cyclictest81rcu_preempt10:25:400
1853599291,4cyclictest81rcu_preempt10:18:490
1853599291,4cyclictest81rcu_preempt08:06:140
18535992912,5cyclictest31223-21tune2fs07:55:160
1853599291,15cyclictest5018-21wget12:30:090
1853599291,15cyclictest16015-21/usr/sbin/munin11:30:290
1853599291,14cyclictest23214-21aten_r4power_po07:35:110
18535992910,6cyclictest13341-21grep11:25:170
18535992910,6cyclictest13341-21grep11:25:170
18535992910,16cyclictest0-21swapper/010:36:110
181232291,5sleep00-21swapper/011:37:430
165702291,5sleep10-21swapper/110:07:171
122012291,5sleep00-21swapper/012:48:060
111612291,5sleep00-21swapper/009:54:480
77052281,5sleep10-21swapper/108:19:211
50532281,5sleep10-21swapper/111:03:371
37582281,5sleep10-21swapper/108:07:221
283052281,4sleep10-21swapper/109:13:151
283052281,4sleep10-21swapper/109:13:151
244672281,5sleep00-21swapper/009:02:240
24442281,5sleep00-21swapper/012:20:370
240912281,5sleep10-21swapper/110:27:101
228862281,5sleep10-21swapper/107:34:361
204252281,5sleep10-21swapper/110:18:191
1853699284,8cyclictest24461-21diskstats11:55:151
1853699284,17cyclictest26063-21/usr/sbin/munin12:00:311
1853699284,17cyclictest17355-21/usr/sbin/munin08:45:321
1853699283,18cyclictest18834-21diskstats11:40:151
1853599288,6cyclictest29308-21fschecks_count07:50:140
1853599282,14cyclictest26347-21df_inode12:00:130
18535992812,5cyclictest25315-21df_inode07:40:120
1853599281,15cyclictest17039-21/usr/sbin/munin10:10:120
1853599281,14cyclictest14410-21ntp_states08:35:240
129432281,5sleep10-21swapper/109:58:491
126602281,5sleep00-21swapper/008:30:270
106072281,5sleep00-21swapper/011:17:500
7852271,5sleep10-21swapper/112:18:251
66672271,5sleep10-21swapper/112:34:381
55922271,5sleep10-21swapper/108:11:581
34792271,5sleep10-21swapper/109:33:051
323162271,5sleep10-21swapper/107:57:141
320092271,5sleep10-21swapper/109:22:301
220872271,5sleep10-21swapper/110:20:531
18536992717,6cyclictest10160-21memory09:50:201
18536992716,7cyclictest25315-21df_inode07:40:121
1853599272,12cyclictest0-21swapper/010:50:100
1853599271,4cyclictest81rcu_preempt11:24:540
1853599271,4cyclictest81rcu_preempt10:46:520
1853599271,4cyclictest81rcu_preempt09:20:400
1853599271,4cyclictest81rcu_preempt08:12:020
1853599271,14cyclictest18942-21taskset08:48:390
183092271,5sleep10-21swapper/111:39:381
169762271,5sleep10-21swapper/108:42:501
123722271,5sleep10-21swapper/111:21:251
122652271,5sleep10-21swapper/112:48:491
106592271,5sleep10-21swapper/111:18:211
92502261,4sleep10-21swapper/108:20:451
66562261,5sleep10-21swapper/111:05:471
54002261,4sleep10-21swapper/109:38:371
286462261,5sleep10-21swapper/107:48:051
238432261,5sleep10-21swapper/111:53:231
186212261,5sleep10-21swapper/110:14:031
1853699268,14cyclictest246612chrt07:38:061
18536992617,5cyclictest14959-21cpuspeed_turbos11:30:121
18536992610,4cyclictest0-21swapper/111:25:231
18536992610,4cyclictest0-21swapper/111:25:231
1853599265,16cyclictest18647-21aten_r4power_vo11:40:120
1853599261,4cyclictest81rcu_preempt10:07:470
1853599261,13cyclictest32156-21perl12:15:170
1853599261,13cyclictest26784-21aten_r4power_cu09:10:100
1853599261,13cyclictest26784-21aten_r4power_cu09:10:100
127042261,5sleep00-21swapper/012:50:130
262192251,4sleep081rcu_preempt10:34:500
1853699259,12cyclictest0-21swapper/108:25:151
18536992516,5cyclictest22-21ksoftirqd/112:23:301
18536992516,5cyclictest22-21ksoftirqd/108:31:141
18536992515,6cyclictest325-21cat10:50:201
1853599252,11cyclictest0-21swapper/008:00:270
1853599251,12cyclictest9829-21taskset08:25:100
1853699248,12cyclictest0-21swapper/112:50:231
1853699243,17cyclictest13786-21cpuspeed_turbos08:35:111
1853699243,17cyclictest0-21swapper/108:55:261
1853699242,19cyclictest0-21swapper/110:43:461
18536992415,5cyclictest22-21ksoftirqd/110:45:511
18536992315,5cyclictest22-21ksoftirqd/109:45:331
18536992313,6cyclictest2009-21runrttasks08:04:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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