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2026-07-19 - 08:18

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 Jul 19, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
266999911091100,6cyclictest0-21swapper/119:29:051
266172691644,31sleep10-21swapper/119:24:431
256172572520,35sleep00-21swapper/019:20:210
285782730,2sleep028581-21sed19:30:000
26699995316,5cyclictest22-21ksoftirqd/123:30:251
26699995221,4cyclictest22-21ksoftirqd/123:59:521
26699995115,6cyclictest22-21ksoftirqd/122:15:171
26699995024,9cyclictest22-21ksoftirqd/121:40:141
26699995019,4cyclictest22-21ksoftirqd/100:23:061
26699994918,4cyclictest22-21ksoftirqd/121:38:521
26699994916,4cyclictest22-21ksoftirqd/123:35:291
26699994915,6cyclictest22-21ksoftirqd/121:30:161
26699994915,6cyclictest22-21ksoftirqd/100:00:211
26699994913,6cyclictest22-21ksoftirqd/121:28:291
26699994815,6cyclictest22-21ksoftirqd/121:14:221
26699994815,6cyclictest22-21ksoftirqd/119:57:101
26699994815,6cyclictest22-21ksoftirqd/119:49:061
26699994815,6cyclictest22-21ksoftirqd/100:40:321
26699994815,6cyclictest22-21ksoftirqd/100:16:031
26699994815,5cyclictest22-21ksoftirqd/123:43:161
26699994815,5cyclictest22-21ksoftirqd/121:16:021
26699994814,6cyclictest22-21ksoftirqd/121:09:321
26699994814,6cyclictest22-21ksoftirqd/100:11:341
57822471,33sleep05943-21cat22:45:130
26699994715,5cyclictest22-21ksoftirqd/122:55:401
26699994715,5cyclictest22-21ksoftirqd/122:06:201
26699994714,6cyclictest22-21ksoftirqd/123:51:561
26699994714,6cyclictest22-21ksoftirqd/123:27:511
26699994714,6cyclictest22-21ksoftirqd/122:50:251
26699994714,6cyclictest22-21ksoftirqd/121:01:441
26699994714,6cyclictest22-21ksoftirqd/120:56:081
26699994714,6cyclictest22-21ksoftirqd/120:44:141
26699994714,6cyclictest22-21ksoftirqd/119:51:341
26699994714,6cyclictest22-21ksoftirqd/119:43:431
26699994714,6cyclictest22-21ksoftirqd/100:05:301
26699994714,5cyclictest22-21ksoftirqd/123:45:241
26699994714,5cyclictest22-21ksoftirqd/123:22:221
26699994714,5cyclictest22-21ksoftirqd/122:21:261
26699994714,5cyclictest22-21ksoftirqd/122:14:581
26699994714,5cyclictest22-21ksoftirqd/100:45:511
26699994713,6cyclictest22-21ksoftirqd/121:23:171
26699994713,6cyclictest22-21ksoftirqd/120:01:171
273722460,5sleep0111rcuc/022:15:180
26699994624,4cyclictest22-21ksoftirqd/120:50:181
26699994623,11cyclictest22-21ksoftirqd/120:20:121
26699994614,6cyclictest22-21ksoftirqd/123:04:101
26699994614,6cyclictest22-21ksoftirqd/120:46:081
26699994614,6cyclictest22-21ksoftirqd/119:37:441
26699994614,6cyclictest22-21ksoftirqd/100:33:001
26699994614,5cyclictest22-21ksoftirqd/123:19:261
26699994614,5cyclictest22-21ksoftirqd/123:10:021
26699994614,5cyclictest22-21ksoftirqd/100:26:101
26699994614,4cyclictest22-21ksoftirqd/122:33:591
26699994613,6cyclictest22-21ksoftirqd/123:07:211
26699994613,6cyclictest22-21ksoftirqd/122:39:261
26699994613,6cyclictest22-21ksoftirqd/100:54:541
26699994513,6cyclictest22-21ksoftirqd/119:30:161
26699994512,6cyclictest22-21ksoftirqd/120:25:231
26699994512,5cyclictest22-21ksoftirqd/122:48:321
26699994423,4cyclictest22-21ksoftirqd/120:35:151
26699994422,12cyclictest22-21ksoftirqd/121:45:131
26699994322,4cyclictest22-21ksoftirqd/122:00:131
26699994322,4cyclictest22-21ksoftirqd/121:50:191
26699994314,10cyclictest22-21ksoftirqd/120:15:291
26699994311,10cyclictest22-21ksoftirqd/121:55:241
2669999419,6cyclictest22-21ksoftirqd/120:10:001
26699994126,4cyclictest22-21ksoftirqd/120:10:131
26699994119,4cyclictest22-21ksoftirqd/120:30:211
26699994020,4cyclictest22-21ksoftirqd/100:35:061
26699993925,4cyclictest22-21ksoftirqd/122:40:151
26699993924,4cyclictest22-21ksoftirqd/122:25:281
74312371,32sleep07533-21/usr/sbin/munin19:55:290
26698993614,6cyclictest18249-21users23:15:310
2669899351,10cyclictest81rcu_preempt22:08:190
2669899336,4cyclictest81rcu_preempt20:20:120
117102331,4sleep011815-21wget21:35:120
2669899321,19cyclictest17046-21sort00:40:170
140822321,27sleep014137-21users00:30:300
50212311,9sleep00-21swapper/000:08:200
2669899311,3cyclictest81rcu_preempt20:35:120
26698993113,5cyclictest15217-21perl00:35:160
26698993112,6cyclictest19667-21timerandwakeup00:45:290
2669899305,4cyclictest81rcu_preempt20:55:100
2669899305,13cyclictest81rcu_preempt23:50:180
2669899303,4cyclictest81rcu_preempt20:51:160
2669899301,4cyclictest81rcu_preempt23:05:470
2669899301,4cyclictest81rcu_preempt20:30:010
2669899301,4cyclictest81rcu_preempt19:45:220
26698993013,5cyclictest5011-21ntp_states21:15:280
2669899301,14cyclictest26707-21diskstats23:40:150
26698993010,7cyclictest5373-21wget00:10:110
26698993010,7cyclictest1664-21seq21:06:200
26698993010,5cyclictest14386-21fschecks_time20:15:150
58602291,5sleep00-21swapper/019:50:580
2669899292,4cyclictest81rcu_preempt23:37:460
2669899292,4cyclictest81rcu_preempt21:57:520
2669899292,13cyclictest2533-21awk21:10:160
26698992918,7cyclictest7161-21wc21:20:280
2669899291,4cyclictest81rcu_preempt21:26:270
2669899291,20cyclictest0-21swapper/020:40:420
26698992911,6cyclictest2059-21/usr/sbin/munin22:35:120
26698992911,6cyclictest19486-21irqstats23:20:230
26698992911,5cyclictest4130-21diskstats22:40:140
2669899291,14cyclictest11558-21latency_hist21:35:000
2669899291,13cyclictest0-21swapper/000:25:160
26698992910,7cyclictest8872-21taskset00:19:200
2669899290,4cyclictest81rcu_preempt20:10:410
262362291,5sleep00-21swapper/022:11:230
220932291,5sleep00-21swapper/023:26:070
188902291,5sleep00-21swapper/021:53:120
152012291,5sleep00-21swapper/021:43:510
10352291,5sleep00-21swapper/023:57:240
296782281,5sleep00-21swapper/023:46:420
2669899288,6cyclictest29808-21ls22:20:310
2669899284,12cyclictest16093-21kernelversion21:45:240
26698992811,5cyclictest9952-21perl22:55:170
2669899281,14cyclictest21605-21tune2fs22:00:160
26698992810,6cyclictest23419-21/usr/sbin/munin23:30:240
2669899280,4cyclictest81rcu_preempt21:03:310
23292281,5sleep00-21swapper/019:44:150
218372281,5sleep00-21swapper/000:51:470
130062281,5sleep00-21swapper/023:04:190
2669899278,6cyclictest32323-21latency_hist22:30:000
2669899272,13cyclictest32491-21users19:35:280
2669899272,13cyclictest29308-21tune2fs19:30:060
26698992718,6cyclictest16821-21cron23:15:000
26698992714,10cyclictest3-21ksoftirqd/020:00:220
2669899271,14cyclictest11565-21gdbus22:52:130
2669899271,13cyclictest2781-21users00:00:310
2669899271,12cyclictest32483-21aten_r4power_po22:30:110
2669899263,4cyclictest81rcu_preempt20:47:550
26698992610,12cyclictest9114-21seq00:20:040
117282261,4sleep00-21swapper/020:08:130
2669899258,5cyclictest81rcu_preempt20:30:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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