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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 Fri Jan 23, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213829911471122,21cyclictest23468-21latency_hist19:30:011
210502595517,62sleep10-21swapper/119:22:051
211002575530,30sleep00-21swapper/019:22:370
460021040,2sleep00-21swapper/021:17:130
164522920,8sleep02138199cyclictest21:30:090
318772900,7sleep00-21swapper/023:59:560
149802780,5sleep0111rcuc/000:50:080
99042770,7sleep02138199cyclictest21:55:360
270592760,4sleep1211ktimersoftd/100:27:491
21381996559,4cyclictest23383-21munin-node19:30:010
2138299437,6cyclictest22-21ksoftirqd/100:52:251
261142420,7sleep12138299cyclictest22:13:051
2138299427,31cyclictest0-21swapper/122:30:561
59142400,2sleep05915-21awk00:05:290
2138199405,25cyclictest81rcu_preempt23:45:160
2138199405,23cyclictest0-21swapper/022:17:400
2138299396,6cyclictest81rcu_preempt23:16:181
2138199397,28cyclictest0-21swapper/022:39:150
2138199394,31cyclictest0-21swapper/000:45:560
2138199392,12cyclictest0-21swapper/022:56:440
2138199391,17cyclictest0-21swapper/023:34:010
21382993827,7cyclictest0-21swapper/122:16:161
21382993823,5cyclictest22-21ksoftirqd/121:25:201
21382993726,8cyclictest0-21swapper/121:10:551
21382993719,4cyclictest22-21ksoftirqd/123:55:131
2138299365,4cyclictest0-21swapper/122:29:351
2138299364,4cyclictest81rcu_preempt00:20:301
2138299361,6cyclictest7045-21fschecks_time23:00:191
2138299361,4cyclictest22-21ksoftirqd/123:50:071
2138199366,4cyclictest81rcu_preempt00:14:460
2138199366,27cyclictest0-21swapper/021:39:550
2138199366,26cyclictest14964-21ssh23:08:370
2138199361,12cyclictest0-21swapper/000:41:010
2116423612,8sleep03-21ksoftirqd/000:21:150
2138299356,4cyclictest81rcu_preempt22:50:301
2138299356,4cyclictest81rcu_preempt22:00:211
2138299355,4cyclictest81rcu_preempt00:45:111
21382993529,4cyclictest138250irq/90-eth000:00:071
21382993525,6cyclictest2645-21snmpd20:01:121
2138299352,12cyclictest81rcu_preempt21:31:401
21382993520,4cyclictest22-21ksoftirqd/121:18:221
2138199354,16cyclictest20748-21munin-run23:15:010
2138199352,5cyclictest0-21swapper/000:27:550
21381993519,6cyclictest2809-21taskset21:49:210
21381993513,18cyclictest13396-21ssh23:40:160
21381993513,11cyclictest19977-21aten_r4power_po20:45:120
80232340,5sleep08020-21ssh21:20:300
295622341,29sleep129656-21/usr/sbin/munin00:30:251
2138299348,22cyclictest0-21swapper/123:48:111
21382993420,4cyclictest22-21ksoftirqd/121:20:221
21382993416,14cyclictest15719-21cut22:35:251
2138299341,4cyclictest81rcu_preempt21:54:521
2138299341,18cyclictest10986-21grep20:20:171
21382993411,10cyclictest81rcu_preempt21:00:241
2138199347,6cyclictest149872wc20:30:220
21381993414,5cyclictest0-21swapper/022:31:170
21381993413,3cyclictest0-21swapper/022:47:250
21381993411,18cyclictest483-21ssh23:26:400
21381993411,18cyclictest483-21ssh23:26:390
125272341,4sleep129175-21diskmemload00:12:451
31162331,5sleep00-21swapper/000:36:010
2138299336,4cyclictest81rcu_preempt23:24:281
2138299333,5cyclictest81rcu_preempt21:41:361
2138299332,6cyclictest22-21ksoftirqd/122:48:271
21382993325,4cyclictest20039-21hddtemp_smartct22:40:151
2138299331,5cyclictest19933-21kworker/1:322:08:161
2138299331,30cyclictest0-21swapper/119:55:361
21382993312,4cyclictest81rcu_preempt20:55:271
2138299331,19cyclictest4109-21ssh00:37:271
2138299331,10cyclictest81rcu_preempt20:05:141
2138199333,7cyclictest81rcu_preempt00:16:070
2138199332,20cyclictest0-21swapper/021:44:310
2138199332,18cyclictest0-21swapper/022:22:300
2138199331,30cyclictest0-21swapper/020:08:160
171052331,4sleep117124-21ntp_states23:10:241
44522321,27sleep04500-21ntp_states21:50:250
321522321,27sleep029175-21diskmemload00:33:140
2138299323,4cyclictest81rcu_preempt21:45:391
2138299321,7cyclictest0-21swapper/100:19:521
2138299321,5cyclictest0-21swapper/119:39:161
2138299321,4cyclictest81rcu_preempt22:20:451
2138299321,4cyclictest81rcu_preempt21:38:531
2138299321,29cyclictest0-21swapper/123:08:161
2138199329,7cyclictest15343-21ssh21:28:440
2138199325,14cyclictest0-21swapper/023:52:490
2138199322,5cyclictest81rcu_preempt23:24:420
21381993224,5cyclictest0-21swapper/022:53:550
2138199322,17cyclictest0-21swapper/023:02:390
2138199321,7cyclictest21670-21ssh22:41:320
2138199321,5cyclictest0-21swapper/019:33:360
21381993214,5cyclictest12580-21plymouth23:40:000
2138199321,29cyclictest0-21swapper/019:56:360
2138199321,29cyclictest0-21swapper/019:51:560
2138299314,25cyclictest0-21swapper/100:09:391
2138299312,4cyclictest81rcu_preempt21:58:121
21382993124,5cyclictest0-21swapper/119:33:161
21382993117,8cyclictest7347-21iostat_ios20:10:231
21382993117,8cyclictest18641-21iostat_ios20:40:221
21382993110,4cyclictest81rcu_preempt23:35:271
2138299310,4cyclictest81rcu_preempt22:59:101
2138199319,18cyclictest28739-21taskset21:05:380
2138199313,4cyclictest81rcu_preempt20:37:270
2138199311,5cyclictest27146-21ssh22:14:350
2138199311,4cyclictest81rcu_preempt23:17:230
2138199311,4cyclictest81rcu_preempt22:02:460
21381993111,6cyclictest31421-21idleruntime-cro19:49:590
21381993110,6cyclictest452-21ssh00:00:210
21382993025,3cyclictest22-21ksoftirqd/123:30:131
21382993022,5cyclictest30497-21gdbus00:40:401
2138299301,27cyclictest0-21swapper/120:15:151
2138199302,16cyclictest0-21swapper/021:00:580
21381993012,5cyclictest5017-21/usr/sbin/munin22:25:120
2138199301,15cyclictest19080-21/usr/sbin/munin22:05:290
2138199301,14cyclictest9482-21/usr/sbin/munin20:15:270
2138299299,4cyclictest81rcu_preempt19:50:391
2138299296,4cyclictest81rcu_preempt23:25:221
2138299296,4cyclictest81rcu_preempt23:25:221
21382992922,4cyclictest12398-21/usr/sbin/munin20:25:151
2138299291,4cyclictest81rcu_preempt23:41:061
21382992914,5cyclictest40550irq/92-i91519:44:271
21382992914,4cyclictest22-21ksoftirqd/121:05:311
2138299291,26cyclictest0-21swapper/120:39:161
21382992911,5cyclictest31410-21watchsnmpd19:50:001
2138199292,14cyclictest12907-21/usr/sbin/munin20:25:180
2138199292,14cyclictest10988-21perl20:20:170
21381992912,5cyclictest23971-21diskstats20:55:140
2138199291,16cyclictest29438-21/usr/sbin/munin21:10:270
2138199291,14cyclictest27149-21grep19:35:290
2138299283,22cyclictest0-21swapper/120:52:361
2138299282,3cyclictest81rcu_preempt20:31:451
2138299281,14cyclictest21115-21grep20:45:301
2138199283,18cyclictest3281-21diskstats20:00:150
21381992810,6cyclictest19841-21sed20:45:010
2138199279,6cyclictest23219-21cron20:52:010
2138199271,13cyclictest6927-21ls20:10:150
2138199263,5cyclictest0-21swapper/019:44:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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