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2026-01-11 - 06:09

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 792 highest latencies:
System rack9slot4s (updated Sun Jan 11, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
274229912601231,26cyclictest0-21swapper/019:25:090
274239912321212,17cyclictest32709-21strings19:35:221
274239911001090,7cyclictest0-21swapper/119:25:071
271322536441,80sleep00-21swapper/019:22:310
272542453363,30sleep10-21swapper/119:23:501
2742299182158,19cyclictest0-21swapper/019:35:210
94922510,6sleep081rcu_preempt21:15:340
288482440,9sleep12742399cyclictest22:42:431
2742299439,30cyclictest0-21swapper/022:29:160
2742299411,13cyclictest8117-21ssh22:20:480
27423993929,6cyclictest22380-21/usr/sbin/munin22:35:361
27423993914,4cyclictest81rcu_preempt20:50:271
2742299398,18cyclictest4840-21seq21:45:110
2742299392,3cyclictest81rcu_preempt20:09:400
145992390,7sleep10-21swapper/120:15:011
2742399381,29cyclictest40550irq/92-i91523:30:121
54882370,3sleep1211ktimersoftd/119:50:111
2742399374,7cyclictest26092-1kworker/1:0H22:59:221
27423993726,7cyclictest5254-21grep21:45:151
2742399371,12cyclictest5902ssh22:46:491
2742399366,4cyclictest81rcu_preempt22:09:501
2742399363,6cyclictest0-21swapper/119:56:161
2742399361,31cyclictest332-21perl21:40:151
27423993611,5cyclictest8131-21sh22:20:501
2742299368,12cyclictest1223-21unixbench_multi23:20:310
2742299363,4cyclictest81rcu_preempt21:25:000
2742299362,21cyclictest10793-21seq20:05:000
27422993611,6cyclictest138250irq/90-eth023:40:240
248652360,4sleep1211ktimersoftd/100:54:161
2742399354,27cyclictest3741-21smartctl22:50:161
2742399353,30cyclictest0-21swapper/122:17:361
27423993528,4cyclictest16666-21ssh22:30:161
2742399352,29cyclictest0-21swapper/121:26:161
2742399352,20cyclictest0-21swapper/100:04:141
2742399351,14cyclictest210782sh23:08:121
2742299352,29cyclictest0-21swapper/021:54:350
2742299352,29cyclictest0-21swapper/021:25:550
2742299351,7cyclictest2309-21cron22:10:000
2742299351,30cyclictest7947-21ssh23:27:560
30452341,29sleep03056-21ssh23:55:400
2742399347,23cyclictest0-21swapper/123:17:561
2742399344,4cyclictest81rcu_preempt23:25:101
2742399343,9cyclictest0-21swapper/100:42:461
2742399343,29cyclictest0-21swapper/119:43:361
2742399341,8cyclictest0-21swapper/121:16:591
2742299345,15cyclictest0-21swapper/023:50:270
2742299345,15cyclictest0-21swapper/023:50:270
2742299344,4cyclictest81rcu_preempt00:37:270
27422993426,5cyclictest0-21swapper/022:36:350
2742299341,6cyclictest2403-21irqbalance22:49:160
2742299341,5cyclictest81rcu_preempt21:40:120
2742299341,5cyclictest24999-21ssh21:31:560
2742299341,21cyclictest30051-21ssh00:24:510
2742299341,21cyclictest20833-21ssh00:49:240
197532341,5sleep119924-21perl22:00:181
297202331,4sleep129803-21memory23:50:221
297202331,4sleep129803-21memory23:50:211
2742399337,22cyclictest0-21swapper/121:56:521
2742399335,4cyclictest81rcu_preempt23:40:161
2742299333,4cyclictest81rcu_preempt00:02:070
2742299332,4cyclictest0-21swapper/021:36:360
2742299332,28cyclictest0-21swapper/000:05:550
2742299332,12cyclictest19687-21df22:00:130
2742299331,5cyclictest0-21swapper/023:32:360
2742299331,30cyclictest0-21swapper/021:02:350
2742299331,29cyclictest0-21swapper/000:11:150
2742299331,14cyclictest18623-21ssh21:59:200
27422993311,4cyclictest0-21swapper/000:30:030
2742299331,13cyclictest0-21swapper/020:42:060
27422993310,6cyclictest19669-21ssh23:06:100
16042331,5sleep00-21swapper/000:28:380
16042331,5sleep00-21swapper/000:28:380
2742399329,11cyclictest81rcu_preempt23:55:201
2742399329,11cyclictest0-21swapper/123:14:461
2742399325,4cyclictest81rcu_preempt21:35:121
2742399323,4cyclictest81rcu_preempt00:23:541
2742399322,13cyclictest0-21swapper/120:08:481
2742399321,3cyclictest20005-21ssh00:14:151
2742399321,10cyclictest0-21swapper/123:00:071
2742299327,12cyclictest16049-21ssh23:02:570
2742299324,4cyclictest81rcu_preempt21:13:290
27422993224,5cyclictest489-21ssh22:14:000
2742299322,19cyclictest0-21swapper/023:38:150
2742299322,17cyclictest0-21swapper/022:40:230
2742299321,5cyclictest0-21swapper/021:05:560
27422993213,6cyclictest27839-21/usr/sbin/munin20:50:310
27422993213,6cyclictest1869-21perl19:40:160
2742299321,29cyclictest0-21swapper/022:57:160
2742299321,29cyclictest0-21swapper/022:17:160
158162321,5sleep00-21swapper/000:42:580
2742399315,13cyclictest81rcu_preempt23:45:141
2742399313,4cyclictest81rcu_preempt21:13:551
2742399312,4cyclictest81rcu_preempt23:20:171
27423993121,6cyclictest1101-21ssh00:27:541
27423993121,6cyclictest1101-21ssh00:27:541
27423993117,10cyclictest138250irq/90-eth000:35:231
2742399311,27cyclictest0-21swapper/121:51:011
2742399311,12cyclictest114022hostname22:25:121
2742299315,12cyclictest30491-21netstat20:55:210
2742299314,5cyclictest81rcu_preempt00:50:030
2742299313,4cyclictest81rcu_preempt23:16:370
2742299313,4cyclictest81rcu_preempt23:11:560
2742299311,4cyclictest81rcu_preempt20:10:240
27422993112,6cyclictest17389-21ntp_states20:20:250
2742399304,15cyclictest0-21swapper/121:30:391
2742399304,11cyclictest30375-21diskstats19:30:141
2742399303,4cyclictest81rcu_preempt22:12:581
2742399301,5cyclictest138250irq/90-eth021:01:211
2742299302,14cyclictest20802-21hddtemp_smartct20:30:160
2742299301,9cyclictest0-21swapper/022:31:360
2742299301,5cyclictest0-21swapper/000:19:280
27422993012,5cyclictest6566-21ssh22:53:160
27422993012,5cyclictest24086-21ssh23:45:030
2742299301,15cyclictest7145-21/usr/sbin/munin19:55:200
2742299301,14cyclictest14893-21wc20:15:120
236312301,5sleep00-21swapper/020:37:150
181222301,5sleep10-21swapper/120:23:251
15382301,25sleep11595-21if_eth021:05:191
49512291,5sleep00-21swapper/019:48:260
2742399292,3cyclictest81rcu_preempt23:37:001
27423992920,6cyclictest3471-21ssh00:30:161
2742399291,8cyclictest21003-21tr00:15:121
2742399291,4cyclictest81rcu_preempt20:15:061
2742399291,4cyclictest81rcu_preempt19:45:151
2742399291,4cyclictest81rcu_preempt00:45:431
2742399291,4cyclictest81rcu_preempt00:05:151
27422992912,5cyclictest6889-21seq19:54:040
90222280,3sleep19023-21date20:00:011
2742399285,4cyclictest81rcu_preempt20:31:031
2742399284,17cyclictest30012-21diskstats20:55:131
2742399282,23cyclictest0-21swapper/121:20:161
2742299282,13cyclictest30375-21diskstats19:30:150
198502281,5sleep00-21swapper/020:26:560
2742399273,4cyclictest81rcu_preempt20:40:011
27423992715,7cyclictest26650-21memory20:45:241
198332271,5sleep10-21swapper/120:26:461
2742299261,15cyclictest0-21swapper/020:45:310
2742399259,12cyclictest0-21swapper/120:40:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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