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2026-04-03 - 18:10

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 Fri Apr 03, 2026 12:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
248649911951181,10cyclictest211ktimersoftd/107:25:251
248639911211090,18cyclictest26021-21smartctl07:25:250
247792815770,30sleep00-21swapper/007:24:420
247942460416,30sleep10-21swapper/107:24:521
193921090,9sleep02486399cyclictest11:24:520
193921090,9sleep02486399cyclictest11:24:520
226052850,8sleep12486499cyclictest08:40:231
95772800,8sleep12486499cyclictest12:05:191
182102780,4sleep0111rcuc/010:00:260
114762730,3sleep041ktimersoftd/009:20:210
296822580,7sleep12486499cyclictest09:39:571
71682560,7sleep02486399cyclictest10:22:490
98442490,7sleep10-21swapper/110:59:291
155812460,7sleep02486399cyclictest09:25:110
40372410,7sleep02486399cyclictest11:25:410
35192410,8sleep02486399cyclictest07:50:210
24864994023,6cyclictest22-21ksoftirqd/112:30:011
114492400,3sleep041ktimersoftd/012:40:240
24864993923,5cyclictest22-21ksoftirqd/111:56:561
24863993926,9cyclictest0-21swapper/009:51:150
24863993913,8cyclictest19483-21ssh11:09:220
24863993913,13cyclictest30599-21cron10:14:000
24863993913,13cyclictest30599-21cron10:14:000
2486399385,10cyclictest81rcu_preempt12:30:010
24863993828,6cyclictest1703-21/usr/sbin/munin10:50:260
24863993810,5cyclictest0-21swapper/010:28:090
72412370,8sleep10-21swapper/110:22:561
24864993727,6cyclictest0-21swapper/110:29:361
69662361,5sleep16980-21ssh12:02:381
65562361,4sleep16567-21ssh11:29:231
2486499367,5cyclictest81rcu_preempt10:07:111
2486499365,17cyclictest40550irq/92-i91511:22:591
2486499365,17cyclictest40550irq/92-i91511:22:581
2486499364,4cyclictest81rcu_preempt10:50:221
24864993626,6cyclictest1323-21iostat12:30:181
24864993626,6cyclictest1323-21iostat12:30:181
2486499361,7cyclictest17424-21ssh11:06:231
24863993617,16cyclictest3-21ksoftirqd/012:49:100
109282360,8sleep02486399cyclictest11:33:410
318762351,30sleep031950-21iostat07:40:180
2486499353,13cyclictest0-21swapper/111:52:121
2486499352,30cyclictest10866-21fschecks_count11:00:151
2486499352,29cyclictest0-21swapper/110:43:361
2486399354,5cyclictest81rcu_preempt10:38:000
2486399352,5cyclictest0-21swapper/011:39:550
2486399352,29cyclictest0-21swapper/011:03:150
24863993516,8cyclictest3-21ksoftirqd/010:33:000
2486399351,5cyclictest10148-21ssh10:59:550
2486399351,21cyclictest4526-21sshd12:33:470
2486399351,21cyclictest4526-21sshd12:33:460
56842341,4sleep05692-21ssh09:47:590
2486499346,4cyclictest81rcu_preempt11:14:191
2486499344,4cyclictest81rcu_preempt10:04:241
24864993418,4cyclictest22-21ksoftirqd/107:45:151
24863993426,6cyclictest0-21swapper/011:15:160
24863993426,5cyclictest2309-21cron09:20:000
2486399342,29cyclictest0-21swapper/009:13:560
2486399342,28cyclictest25956-21ssh10:41:570
24863993420,4cyclictest3-21ksoftirqd/012:15:120
24863993419,4cyclictest3-21ksoftirqd/009:32:280
24863993419,4cyclictest3-21ksoftirqd/009:32:280
24863993416,8cyclictest3-21ksoftirqd/011:40:230
2486399341,30cyclictest0-21swapper/011:14:360
2486399341,21cyclictest12318-21seq08:15:010
2486399341,21cyclictest12318-21seq08:15:000
2486399341,20cyclictest20181-21iostat12:50:160
2486499338,4cyclictest81rcu_preempt09:16:291
2486499338,22cyclictest0-21swapper/109:22:461
2486499338,14cyclictest40550irq/92-i91512:16:451
2486499334,7cyclictest81rcu_preempt11:36:581
2486499333,5cyclictest81rcu_preempt12:35:121
2486499333,5cyclictest0-21swapper/108:47:561
2486499333,4cyclictest81rcu_preempt12:13:121
2486499331,4cyclictest81rcu_preempt12:24:411
2486499331,4cyclictest81rcu_preempt11:49:301
2486399339,8cyclictest0-21swapper/012:10:510
24863993317,5cyclictest3-21ksoftirqd/009:39:140
24863993315,5cyclictest3-21ksoftirqd/009:55:530
24863993313,6cyclictest31844-21diskstats11:55:150
24863993313,5cyclictest3-21ksoftirqd/012:06:160
2486399331,29cyclictest27260-21cron08:59:560
2486399331,28cyclictest25186-21ssh12:20:540
2486399331,14cyclictest8881-21ssh12:38:050
242362331,5sleep00-21swapper/011:46:540
268082322,7sleep10-21swapper/111:15:571
2486499324,25cyclictest0-21swapper/109:44:551
2486499322,3cyclictest81rcu_preempt12:48:161
2486499321,6cyclictest0-21swapper/111:40:551
2486499321,4cyclictest81rcu_preempt10:33:151
2486499321,4cyclictest81rcu_preempt08:18:221
2486399325,14cyclictest3302-21runrttasks08:35:150
2486399324,4cyclictest81rcu_preempt09:42:140
24863993225,5cyclictest0-21swapper/010:09:560
24863993216,5cyclictest3-21ksoftirqd/012:00:220
24863993213,6cyclictest29922-21irqstats09:00:210
2486399321,29cyclictest0-21swapper/008:21:150
2486399321,28cyclictest0-21swapper/010:45:150
236492321,4sleep123672-21pidof12:55:001
2486499312,4cyclictest81rcu_preempt10:48:201
2486499312,4cyclictest81rcu_preempt09:52:241
2486499312,25cyclictest30064-21irqstats07:35:211
2486499311,9cyclictest0-21swapper/110:35:401
24864993116,5cyclictest22-21ksoftirqd/110:15:261
2486499311,5cyclictest81rcu_preempt10:10:041
2486499311,5cyclictest81rcu_preempt10:10:041
2486499311,4cyclictest81rcu_preempt12:42:571
2486499311,4cyclictest81rcu_preempt09:47:511
2486499311,4cyclictest81rcu_preempt09:26:411
2486499311,4cyclictest81rcu_preempt09:14:581
2486499311,27cyclictest0-21swapper/109:30:561
2486499311,27cyclictest0-21swapper/109:30:551
2486499310,5cyclictest81rcu_preempt08:13:041
2486499310,5cyclictest81rcu_preempt08:13:041
2486399314,12cyclictest31966-21uniq10:15:150
2486499309,6cyclictest0-21swapper/107:43:491
2486499306,4cyclictest81rcu_preempt09:08:081
2486499301,4cyclictest81rcu_preempt07:30:201
24864993012,15cyclictest22-21ksoftirqd/109:58:021
2486399301,27cyclictest0-21swapper/009:06:160
2486399301,16cyclictest24885-21/usr/sbin/munin08:45:280
216002304,5sleep10-21swapper/108:39:591
291232291,5sleep10-21swapper/108:59:551
290382291,5sleep00-21swapper/007:32:450
2486499294,5cyclictest81rcu_preempt08:25:111
2486499292,10cyclictest7971-21irqstats11:30:201
24864992920,5cyclictest3977-21grep07:50:271
2486499291,5cyclictest0-21swapper/108:33:351
2486499291,4cyclictest81rcu_preempt09:04:031
2486499291,4cyclictest81rcu_preempt07:59:191
2486499291,26cyclictest0-21swapper/108:51:151
2486399298,6cyclictest1796-21/usr/sbin/munin07:45:260
2486399292,7cyclictest16973-21ntp_states08:25:240
2486399292,15cyclictest0-21swapper/008:16:480
2486399292,13cyclictest30293-21ntp_states07:35:240
24863992914,8cyclictest25843-21diskstats08:50:150
24863992913,5cyclictest3-21ksoftirqd/011:50:010
24863992910,7cyclictest9225-21kernelversion08:05:200
233352291,5sleep00-21swapper/008:43:180
193352291,5sleep00-21swapper/008:30:570
59772281,5sleep00-21swapper/007:55:570
99502271,5sleep10-21swapper/108:06:031
24864992718,5cyclictest14346-21wget08:20:111
24864992712,11cyclictest7766-21unixbench_singl08:00:281
82072261,5sleep00-21swapper/008:04:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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