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2026-04-21 - 04:45

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 highest latencies:
System rack9slot4s (updated Tue Apr 21, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
227799912461221,22cyclictest0-21swapper/019:25:040
227809912361227,6cyclictest0-21swapper/119:25:061
227809912081187,17cyclictest27810-21smartctl19:35:181
223802606559,32sleep10-21swapper/119:21:231
224002598551,32sleep00-21swapper/019:21:350
2277999145136,6cyclictest0-21swapper/019:35:170
244832980,9sleep02277999cyclictest22:43:010
176132650,3sleep020480-21kworker/0:323:42:310
220692590,8sleep12278099cyclictest00:20:241
187432590,7sleep12278099cyclictest23:44:091
158062550,4sleep1211ktimersoftd/121:27:141
315122540,33sleep131510-21ssh22:50:171
64202480,8sleep02277999cyclictest00:05:000
203842440,5sleep0111rcuc/000:53:100
203842440,5sleep0111rcuc/000:53:090
13812420,8sleep02277999cyclictest19:50:280
73232391,3sleep17325-21ssh21:19:041
2277999394,6cyclictest0-21swapper/022:13:390
22779993910,18cyclictest28918-21python21:40:290
22780993827,7cyclictest8285-21cut21:20:111
2278099382,22cyclictest3698-21unixbench_multi19:55:291
22779993815,8cyclictest3-21ksoftirqd/023:50:200
309412371,32sleep130952-21ssh21:43:031
2278099376,5cyclictest81rcu_preempt22:16:001
2277999379,5cyclictest0-21swapper/022:25:060
2278099363,5cyclictest81rcu_preempt23:13:261
2277999364,10cyclictest10664-21memory23:35:210
12792360,8sleep12278099cyclictest23:25:291
2278099354,5cyclictest81rcu_preempt22:42:431
2277999357,13cyclictest3585-21cut00:35:120
2277999351,21cyclictest15618-21memory22:00:220
179362351,30sleep118031-21hddtemp_smartct20:35:171
179362351,30sleep118031-21hddtemp_smartct20:35:171
94402341,4sleep12695-21snmpd20:10:461
2278099349,10cyclictest31053-21tr21:10:121
22780993419,4cyclictest22-21ksoftirqd/100:36:311
22780993419,4cyclictest22-21ksoftirqd/100:32:591
2277999341,7cyclictest18808-21ssh00:16:530
22779993411,8cyclictest14089-21ssh23:05:260
117862340,6sleep0111rcuc/021:56:030
300382331,28sleep030049-21ssh23:21:500
22780993314,16cyclictest22-21ksoftirqd/100:01:321
22780993311,18cyclictest0-21swapper/123:18:071
2277999339,4cyclictest81rcu_preempt22:35:300
2277999333,4cyclictest81rcu_preempt21:28:140
2277999332,11cyclictest0-21swapper/021:10:010
22779993316,8cyclictest0-21swapper/022:22:460
2277999331,15cyclictest0-21swapper/021:50:330
133862330,5sleep0111rcuc/000:11:020
62372321,3sleep06247-21ssh22:57:300
318762321,27sleep031906-21ntp_states00:30:250
302842321,5sleep00-21swapper/022:49:280
2278099324,11cyclictest45802grep20:00:121
22780993224,5cyclictest12105-21ssh00:43:551
2278099322,15cyclictest13773-21iostat23:05:191
22780993215,14cyclictest22-21ksoftirqd/121:50:121
2278099321,19cyclictest0-21swapper/121:37:531
2278099321,10cyclictest0-21swapper/123:54:131
2277999328,12cyclictest11564-21packagekitd21:24:000
2277999325,4cyclictest81rcu_preempt23:01:020
2277999323,4cyclictest81rcu_preempt22:05:210
2277999321,16cyclictest3286-21runrttasks00:42:540
2277999321,13cyclictest0-21swapper/021:46:490
237542311,4sleep023778-21ntp_states23:15:250
237362311,26sleep123750-21ssh22:09:161
231982311,26sleep123209-21ssh23:48:351
2278099317,5cyclictest81rcu_preempt19:50:261
2278099314,24cyclictest0-21swapper/122:31:021
22780993122,6cyclictest10080-21aten_r4power_po20:15:111
2278099312,25cyclictest0-21swapper/123:23:391
2278099312,16cyclictest30564-21diskmemload22:03:371
22780993118,9cyclictest24608-21cut22:10:111
2278099311,10cyclictest35042aten_r4power_po22:55:121
2277999313,7cyclictest81rcu_preempt23:55:280
22779993113,6cyclictest9855-21/usr/sbin/munin20:15:000
22779993112,6cyclictest32578-21ssh21:10:550
2277999311,16cyclictest5407-21python20:00:290
22779993111,6cyclictest3286-21runrttasks23:11:520
22779993110,6cyclictest0-21swapper/000:45:470
307582301,5sleep00-21swapper/019:43:200
251002301,3sleep00-21swapper/021:36:380
245392301,5sleep00-21swapper/020:51:140
2278099306,9cyclictest3029-1kworker/1:1H21:49:591
2278099306,12cyclictest0-21swapper/100:10:151
2278099305,16cyclictest0-21swapper/123:56:091
2278099302,4cyclictest81rcu_preempt23:30:151
2278099302,13cyclictest29327-21ssh22:48:031
2278099301,8cyclictest21282-21ssh21:33:081
22780993015,4cyclictest22-21ksoftirqd/122:20:271
2278099301,4cyclictest81rcu_preempt19:44:471
22780993012,15cyclictest22-21ksoftirqd/100:50:091
22780993012,15cyclictest22-21ksoftirqd/100:50:091
22780993011,14cyclictest208602chrt20:42:011
2277999309,6cyclictest8752-21ssh00:06:210
2277999308,5cyclictest0-21swapper/021:30:050
2277999307,6cyclictest0-21swapper/023:33:120
2277999304,4cyclictest81rcu_preempt22:16:210
22779993011,5cyclictest26791-21irqstats00:25:210
2277999301,10cyclictest0-21swapper/021:18:050
22779993010,6cyclictest22618-21grep00:20:300
210022301,5sleep00-21swapper/020:43:310
202772301,4sleep020288-21iostat_ios23:45:200
133372301,5sleep10-21swapper/121:58:181
105472300,3sleep1211ktimersoftd/123:35:191
96112291,24sleep19622-21ssh00:07:371
62642291,25sleep02695-21snmpd20:05:120
268512291,5sleep00-21swapper/019:31:590
2278099299,4cyclictest81rcu_preempt22:38:331
2278099294,4cyclictest81rcu_preempt19:32:061
2278099291,14cyclictest15718-21ssh00:47:381
2277999298,10cyclictest11948-21basename20:20:120
2277999293,13cyclictest0-21swapper/023:28:320
2277999292,15cyclictest3662-21/usr/sbin/munin19:55:280
2277999292,13cyclictest0-21swapper/022:30:290
2277999291,4cyclictest81rcu_preempt20:25:260
22779992910,6cyclictest22394-21grep20:45:290
115982291,5sleep00-21swapper/020:18:370
112232291,5sleep10-21swapper/123:02:421
284082281,5sleep10-21swapper/121:02:161
266582281,5sleep00-21swapper/020:58:470
229582281,5sleep10-21swapper/120:49:171
2278099289,15cyclictest0-21swapper/100:26:541
2278099281,19cyclictest0-21swapper/121:08:461
2277999289,6cyclictest31573-21hddtemp_smartct19:45:160
2277999281,13cyclictest2203-21ssh22:53:470
76402271,5sleep10-21swapper/120:06:321
325682271,5sleep10-21swapper/119:47:391
2278099274,4cyclictest81rcu_preempt20:26:051
2278099274,18cyclictest26858-21sort21:00:001
2278099271,22cyclictest6755-21ssh22:25:131
22780992711,12cyclictest0-21swapper/100:17:391
2278099264,4cyclictest81rcu_preempt20:54:031
2277999269,4cyclictest15779-21aten_r4power_vo20:30:130
2277999268,6cyclictest17837-21diskstats20:35:150
2277999268,6cyclictest17837-21diskstats20:35:140
2277999262,12cyclictest2401-21NetworkManager21:03:020
2278099251,10cyclictest15778-21wget20:30:141
2278099244,18cyclictest0-21swapper/120:23:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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