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2026-04-28 - 18:41

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 Tue Apr 28, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
248439912011186,12cyclictest0-21swapper/119:25:121
248439911491123,20cyclictest20845-21strings21:30:241
248429910851062,17cyclictest0-21swapper/019:25:150
245962770723,31sleep10-21swapper/119:22:591
243972464417,31sleep00-21swapper/019:20:550
3221621080,5sleep032212-21grep23:55:280
208042990,5sleep00-21swapper/000:51:370
57542950,5sleep05751-21grep00:35:240
173052940,8sleep12484399cyclictest00:14:391
154652810,7sleep00-21swapper/021:58:440
24842998056,21cyclictest0-21swapper/021:30:230
56242790,5sleep15611-21ssh22:55:171
121332790,4sleep041ktimersoftd/000:41:580
111082720,8sleep12484399cyclictest23:34:501
308842620,7sleep02484299cyclictest23:20:370
24843995514,6cyclictest22-21ksoftirqd/123:00:401
3612540,4sleep1211ktimersoftd/122:50:131
24843995419,5cyclictest22-21ksoftirqd/123:18:031
24843995414,6cyclictest22-21ksoftirqd/122:15:071
24843995414,6cyclictest22-21ksoftirqd/121:17:521
24843995413,6cyclictest22-21ksoftirqd/100:06:561
24843995317,16cyclictest22-21ksoftirqd/123:20:171
2484399528,5cyclictest22-21ksoftirqd/121:49:131
24843995220,4cyclictest22-21ksoftirqd/100:46:281
24843995213,6cyclictest22-21ksoftirqd/122:05:521
24843995118,4cyclictest22-21ksoftirqd/123:13:571
24843995115,6cyclictest22-21ksoftirqd/123:50:261
24843995114,6cyclictest22-21ksoftirqd/123:40:121
24843995114,6cyclictest22-21ksoftirqd/121:25:101
2484399509,6cyclictest22-21ksoftirqd/122:41:261
2484399507,6cyclictest22-21ksoftirqd/123:07:031
2484399507,6cyclictest22-21ksoftirqd/122:00:571
2484399506,6cyclictest22-21ksoftirqd/123:37:221
2484399506,6cyclictest22-21ksoftirqd/122:20:451
24843995021,4cyclictest22-21ksoftirqd/122:35:171
24843995016,5cyclictest22-21ksoftirqd/121:50:241
24843995014,6cyclictest22-21ksoftirqd/100:50:191
24843995013,6cyclictest22-21ksoftirqd/122:34:361
24843995013,6cyclictest22-21ksoftirqd/122:34:351
24843995012,5cyclictest22-21ksoftirqd/100:38:231
2484399498,5cyclictest22-21ksoftirqd/100:02:581
2484399497,6cyclictest22-21ksoftirqd/100:44:401
2484399496,5cyclictest22-21ksoftirqd/100:26:541
24843994915,6cyclictest22-21ksoftirqd/100:17:351
24843994914,5cyclictest22-21ksoftirqd/121:20:221
2484399486,5cyclictest22-21ksoftirqd/122:10:331
24843994813,5cyclictest22-21ksoftirqd/121:12:481
154812481,30sleep015492-21ssh22:31:350
154812481,30sleep015492-21ssh22:31:350
2484399476,6cyclictest22-21ksoftirqd/123:25:541
24843994713,6cyclictest22-21ksoftirqd/123:59:221
24843994712,6cyclictest22-21ksoftirqd/100:20:491
24843994711,5cyclictest22-21ksoftirqd/121:00:091
2484299477,4cyclictest81rcu_preempt19:40:000
24843994612,6cyclictest22-21ksoftirqd/122:26:021
24843994612,6cyclictest22-21ksoftirqd/100:33:391
24843994612,14cyclictest22-21ksoftirqd/123:48:281
305242450,7sleep02484299cyclictest22:47:180
24843994512,6cyclictest22-21ksoftirqd/122:46:401
142942450,8sleep02484299cyclictest00:45:060
2484399449,5cyclictest22-21ksoftirqd/121:40:281
24843994413,6cyclictest22-21ksoftirqd/119:45:011
24843994311,6cyclictest22-21ksoftirqd/120:06:551
24843994310,6cyclictest22-21ksoftirqd/121:35:411
24843994310,6cyclictest22-21ksoftirqd/120:56:051
24843994310,5cyclictest22-21ksoftirqd/120:41:231
2484399428,6cyclictest22-21ksoftirqd/120:50:241
24843994224,4cyclictest22-21ksoftirqd/120:25:221
24843994223,4cyclictest22-21ksoftirqd/120:30:121
24843994223,4cyclictest22-21ksoftirqd/120:10:121
24843994223,4cyclictest22-21ksoftirqd/119:55:151
24843994124,4cyclictest22-21ksoftirqd/120:15:311
24843994118,4cyclictest22-21ksoftirqd/119:45:131
2484399408,5cyclictest22-21ksoftirqd/121:55:031
24843994020,4cyclictest22-21ksoftirqd/121:05:171
24843994012,6cyclictest22-21ksoftirqd/119:53:071
24843994010,10cyclictest22-21ksoftirqd/119:35:111
24843993925,4cyclictest22-21ksoftirqd/120:45:271
24843993924,4cyclictest22-21ksoftirqd/120:35:111
2484399391,6cyclictest6629-21/usr/sbin/munin20:00:131
24843993817,4cyclictest22-21ksoftirqd/119:30:031
24843993722,4cyclictest22-21ksoftirqd/120:20:101
91182360,8sleep00-21swapper/022:59:090
269322360,5sleep0111rcuc/023:50:240
2484299354,5cyclictest81rcu_preempt21:39:350
2484299351,11cyclictest6828-21tr23:30:090
299622341,29sleep029657-21/usr/sbin/munin21:40:140
2484299346,12cyclictest13475-21cut00:10:170
2484299345,5cyclictest81rcu_preempt23:40:150
2484299345,4cyclictest81rcu_preempt00:30:260
2484299344,4cyclictest81rcu_preempt23:47:440
2484299344,4cyclictest81rcu_preempt23:08:100
2484299343,4cyclictest81rcu_preempt22:53:440
2484299341,14cyclictest0-21swapper/021:18:040
2484299339,12cyclictest29839-21ssh00:26:460
2484299338,12cyclictest14213-21cstates20:20:110
2484299334,4cyclictest81rcu_preempt22:14:140
2484299334,4cyclictest81rcu_preempt00:00:470
2484299333,4cyclictest81rcu_preempt22:25:180
2484299333,16cyclictest32629-21munin-run21:10:010
24842993323,6cyclictest11971-21ssh23:35:170
2484299332,16cyclictest16639-21/usr/sbin/munin22:00:330
2484299331,9cyclictest4565-21ntpdc22:20:240
24842993311,4cyclictest0-21swapper/021:55:000
2484299329,4cyclictest81rcu_preempt21:20:280
2484299328,12cyclictest2225-21dbus-daemon19:57:370
2484299326,13cyclictest8109-21runrttasks00:05:060
2484299324,4cyclictest81rcu_preempt23:12:530
2484299324,4cyclictest81rcu_preempt22:05:040
2484299324,4cyclictest81rcu_preempt00:21:210
2484299323,4cyclictest81rcu_preempt23:27:520
2484299323,4cyclictest81rcu_preempt21:12:500
24842993222,6cyclictest22336-21ntp_states20:40:260
2484299321,5cyclictest81rcu_preempt22:15:200
2484299321,19cyclictest18344-21cut00:15:180
2484299321,12cyclictest0-21swapper/021:27:130
2484299320,3cyclictest81rcu_preempt22:35:090
2484299313,4cyclictest81rcu_preempt23:02:170
2484299313,4cyclictest81rcu_preempt20:30:110
2484299312,5cyclictest81rcu_preempt23:15:300
24842993112,6cyclictest25313-21ssh22:41:460
250162301,5sleep00-21swapper/020:49:110
2484299305,13cyclictest0-21swapper/021:49:370
2484299301,4cyclictest81rcu_preempt20:52:330
2484299296,12cyclictest2401-21NetworkManager19:48:070
2484299295,12cyclictest11564-21packagekitd20:09:050
2484299294,11cyclictest29810-21netstat21:00:200
2484299293,13cyclictest12682-21iostat_ios20:15:220
2484299291,4cyclictest81rcu_preempt20:00:160
24842992912,5cyclictest27732-21iostat20:55:190
172232291,5sleep00-21swapper/020:26:280
116552291,5sleep00-21swapper/020:12:160
289552281,4sleep00-21swapper/019:32:180
2484299288,7cyclictest3071-21sort19:50:160
24842992813,11cyclictest1974-21lldpad20:39:440
24842992710,5cyclictest32104-21ntp_states19:40:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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