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2026-05-31 - 09:12

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 Sun May 31, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
266609910741066,5cyclictest0-21swapper/119:28:111
249232562516,29sleep00-21swapper/019:20:120
262822557512,29sleep10-21swapper/119:21:371
2665999238215,20cyclictest0-21swapper/019:28:100
285022720,5sleep081rcu_preempt23:45:130
111222690,4sleep041ktimersoftd/000:25:120
88752331,28sleep18957-21memory20:00:211
304212331,4sleep130426-21diskstats23:50:151
2666099334,25cyclictest5503-21cat22:44:551
26659993314,6cyclictest21708-21df20:35:130
162892330,3sleep041ktimersoftd/020:20:160
162892330,3sleep041ktimersoftd/020:20:150
67062321,5sleep10-21swapper/100:11:451
2665999321,10cyclictest9464-21aten_r4power_en22:55:110
123212325,4sleep10-21swapper/120:10:151
2666099315,19cyclictest4745-21iostat_ios21:15:231
2665999315,4cyclictest81rcu_preempt19:59:570
2665999315,12cyclictest893-21mailstats22:30:270
2665999312,16cyclictest20376-21ntp_states20:30:230
2665999311,4cyclictest81rcu_preempt22:43:050
2665999311,4cyclictest81rcu_preempt00:07:320
74042301,5sleep00-21swapper/021:21:240
35692301,5sleep00-21swapper/021:10:460
2666099304,10cyclictest11259-21diskstats00:25:141
2666099302,23cyclictest23550-21iostat22:05:171
26660993016,8cyclictest25074-21iostat_ios23:35:201
2666099301,25cyclictest14799-21grep21:40:301
2665999305,14cyclictest0-21swapper/023:05:130
2665999304,4cyclictest81rcu_preempt19:46:520
26659993022,4cyclictest14056-21cpu20:15:110
2665999301,4cyclictest81rcu_preempt21:18:090
2665999301,4cyclictest81rcu_preempt00:51:490
2665999301,20cyclictest0-21swapper/023:50:340
2665999301,12cyclictest11293-21grep20:05:290
222872301,5sleep10-21swapper/123:28:281
219082301,25sleep121918-21ntp_states22:00:251
48752290,3sleep0111rcuc/019:50:160
32422291,5sleep00-21swapper/000:04:500
318842291,5sleep10-21swapper/122:26:411
308142291,5sleep00-21swapper/019:32:450
2666099294,18cyclictest17613-21diskstats21:50:151
2666099293,20cyclictest8608-21memory21:25:231
26660992920,5cyclictest4335-21cron19:50:001
2665999295,11cyclictest0-21swapper/022:25:140
2665999294,4cyclictest81rcu_preempt23:11:330
2665999294,18cyclictest13853-21python00:30:270
2665999292,4cyclictest81rcu_preempt22:11:360
2665999292,14cyclictest18579-21users21:50:290
26659992920,5cyclictest15780-21cut21:45:160
2665999291,4cyclictest81rcu_preempt23:15:240
2665999291,4cyclictest81rcu_preempt21:00:450
2665999291,4cyclictest81rcu_preempt00:24:170
2665999291,15cyclictest31366-21grep19:35:120
26659992911,5cyclictest11565-21gdbus21:31:500
2665999291,14cyclictest22809-21munin-plugin-st22:05:000
2665999291,13cyclictest5745-21fschecks_time00:10:170
26659992910,7cyclictest30607-21chrt20:59:250
261942291,5sleep10-21swapper/122:11:211
251892291,5sleep00-21swapper/020:45:060
250272291,5sleep10-21swapper/120:44:591
230632291,5sleep10-21swapper/120:39:141
164792291,5sleep10-21swapper/123:11:471
15222291,5sleep10-21swapper/122:33:541
150712291,5sleep00-21swapper/021:42:510
135722291,5sleep00-21swapper/020:13:180
89862281,5sleep10-21swapper/122:52:061
85862281,5sleep00-21swapper/000:16:470
80672281,5sleep10-21swapper/119:59:511
57612280,4sleep1201rcuc/122:45:131
298452281,5sleep10-21swapper/123:48:461
284492281,5sleep00-21swapper/020:51:290
281962281,5sleep10-21swapper/122:17:341
2666099289,15cyclictest0-21swapper/100:00:141
2666099283,19cyclictest22895-21diskstats23:30:141
26660992820,5cyclictest653-21fschecks_count21:05:151
26660992810,14cyclictest2695-21snmpd19:52:261
2665999289,4cyclictest11564-21packagekitd22:15:130
2665999284,18cyclictest29444-21ntp_states22:20:250
2665999281,4cyclictest81rcu_preempt00:45:330
2665999281,18cyclictest0-21swapper/021:05:200
2665999281,13cyclictest16427-21cron00:40:000
2665999280,4cyclictest81rcu_preempt23:25:460
209852281,5sleep10-21swapper/120:32:091
192702281,4sleep00-21swapper/020:28:480
179342281,5sleep10-21swapper/100:41:011
179342281,5sleep10-21swapper/100:41:011
144912281,5sleep10-21swapper/123:05:361
129742281,5sleep10-21swapper/123:04:211
127552281,5sleep00-21swapper/023:02:030
49442271,5sleep10-21swapper/100:07:551
307592271,5sleep10-21swapper/119:32:121
283832271,4sleep10-21swapper/120:50:481
2666099279,14cyclictest2225-21dbus-daemon23:55:281
2666099279,14cyclictest2225-21dbus-daemon23:55:271
26660992719,5cyclictest22-21ksoftirqd/123:40:261
26660992714,7cyclictest6641-21iostat_ios21:20:201
26660992712,11cyclictest0-21swapper/120:05:251
26660992710,5cyclictest13516-21latency_hist21:40:011
2665999278,5cyclictest3286-21runrttasks20:00:280
2665999271,4cyclictest81rcu_preempt21:59:110
2665999271,17cyclictest0-21swapper/022:39:240
2665999271,14cyclictest23242-21df22:05:110
2665999271,12cyclictest32016-21hostname23:55:120
2665999271,12cyclictest32016-21hostname23:55:120
26659992711,14cyclictest0-21swapper/023:43:230
207002271,4sleep10-21swapper/121:57:541
190492271,4sleep10-21swapper/120:26:311
185122271,5sleep10-21swapper/100:45:081
183332271,5sleep10-21swapper/123:16:341
171142271,5sleep10-21swapper/120:20:551
171142271,5sleep10-21swapper/120:20:541
152992271,5sleep10-21swapper/120:16:451
145162271,5sleep10-21swapper/100:34:401
133612271,5sleep00-21swapper/021:39:480
113702271,5sleep10-21swapper/121:33:361
104892271,5sleep10-21swapper/100:21:511
304602261,5sleep10-21swapper/120:57:531
26660992617,6cyclictest22-21ksoftirqd/121:02:191
26660992616,5cyclictest29320-21sort22:20:221
2665999268,9cyclictest0-21swapper/020:43:500
2665999262,12cyclictest0-21swapper/023:20:150
26659992616,6cyclictest22611-21cut23:30:090
2665999261,4cyclictest81rcu_preempt22:47:250
2665999261,12cyclictest877-21ls19:40:120
2665999261,12cyclictest8101-21cpuspeed_turbos21:25:140
26659992610,13cyclictest0-21swapper/000:40:120
26659992610,13cyclictest0-21swapper/000:40:110
170832261,5sleep10-21swapper/121:49:151
163552261,4sleep10-21swapper/100:39:161
110292261,5sleep10-21swapper/122:58:521
26660992516,6cyclictest22-21ksoftirqd/120:45:081
26660992516,5cyclictest3623-21sh22:40:001
26660992515,6cyclictest32310-21cat19:35:271
26660992510,12cyclictest0-21swapper/121:10:241
217692251,5sleep10-21swapper/100:51:291
2666099247,13cyclictest0-21swapper/123:20:281
26660992411,8cyclictest7785-21iostat_ios00:15:201
2665999241,19cyclictest8660-21timerandwakeup22:50:270
26660992314,6cyclictest22-21ksoftirqd/119:41:161
2665999236,9cyclictest0-21swapper/023:36:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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