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2026-04-05 - 20:17

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 100 highest latencies:
System rack9slot4s (updated Sun Apr 05, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
182322564518,31sleep10-21swapper/107:24:491
182132518472,31sleep00-21swapper/007:24:360
1830699170164,4cyclictest22-21ksoftirqd/107:25:211
70962960,4sleep10-21swapper/108:15:271
202822920,8sleep01830599cyclictest08:50:300
225992910,3sleep1211ktimersoftd/109:39:121
233392900,8sleep11830699cyclictest07:35:151
103692800,4sleep1211ktimersoftd/109:25:301
174132630,2sleep117412-21sh11:46:451
246812490,4sleep0111rcuc/012:28:030
6662470,7sleep01830599cyclictest08:00:180
1830599471,12cyclictest2489-21ssh10:25:150
275002450,7sleep11830699cyclictest07:45:241
121772450,4sleep0111rcuc/009:28:070
18306994322,5cyclictest22-21ksoftirqd/110:47:031
187962410,20sleep1211ktimersoftd/111:15:151
18306994029,8cyclictest0-21swapper/110:10:151
1830699401,35cyclictest0-21swapper/110:25:361
3482391,4sleep1349-21sh10:22:511
1830599395,30cyclictest0-21swapper/011:01:160
1830699387,28cyclictest0-21swapper/112:13:381
1830599389,15cyclictest0-21swapper/009:20:230
1830599389,14cyclictest31141-21ls10:55:000
1830599389,14cyclictest31141-21ls10:54:590
1830599383,22cyclictest21427-21ls08:55:180
18305993811,10cyclictest0-21swapper/009:10:420
191942371,32sleep126388-21diskmemload12:22:081
1830699377,27cyclictest14994-21cron10:05:011
1830699376,5cyclictest81rcu_preempt10:30:191
18306993628,5cyclictest19426-21fschecks_time08:50:161
1830599361,8cyclictest13962-21irqstats08:35:200
28502351,30sleep12890-21ntp_states08:05:251
1830699353,29cyclictest0-21swapper/107:44:161
1830699351,30cyclictest3005-21sh09:18:551
1830599357,15cyclictest2206-21dbus-daemon12:40:010
1830599356,4cyclictest81rcu_preempt10:55:280
18305993528,4cyclictest0-21swapper/011:40:350
1830599352,21cyclictest21674-21memory07:30:220
18305993514,4cyclictest15885-21memory11:45:220
1830599351,13cyclictest3302-21runrttasks11:50:120
18305993510,11cyclictest29593-21timerwakeupswit09:45:290
9152347,8sleep03-21ksoftirqd/010:23:400
32822341,29sleep13297-21ssh11:32:221
294032341,4sleep129417-21ssh12:32:541
1830699349,13cyclictest22-21ksoftirqd/111:11:301
1830699346,4cyclictest81rcu_preempt09:40:211
1830699344,4cyclictest81rcu_preempt12:25:411
1830699344,4cyclictest81rcu_preempt11:07:131
1830699344,4cyclictest81rcu_preempt10:58:281
1830699343,5cyclictest81rcu_preempt12:40:261
1830699343,4cyclictest81rcu_preempt09:51:011
18306993426,4cyclictest22-21ksoftirqd/112:36:421
1830699342,19cyclictest0-21swapper/109:45:181
1830699341,8cyclictest0-21swapper/110:18:161
18306993417,4cyclictest22-21ksoftirqd/111:41:141
1830699341,4cyclictest81rcu_preempt12:00:171
1830699341,17cyclictest26394-21idleruntime-cro09:10:001
1830599345,4cyclictest81rcu_preempt11:39:220
1830599344,4cyclictest81rcu_preempt09:40:010
18305993427,4cyclictest0-21swapper/010:47:560
1830599342,4cyclictest81rcu_preempt12:01:300
1830599342,28cyclictest0-21swapper/012:17:560
1830599342,28cyclictest0-21swapper/010:05:550
1830599341,30cyclictest138250irq/90-eth008:09:040
1830599341,29cyclictest22980-21ssh10:12:360
1830599341,29cyclictest11969-21ssh10:00:360
18305993411,5cyclictest14103-21/usr/sbin/munin09:30:150
1830699333,4cyclictest81rcu_preempt11:50:221
1830699333,4cyclictest81rcu_preempt11:01:521
1830699333,4cyclictest81rcu_preempt10:52:581
1830699333,4cyclictest81rcu_preempt10:52:581
1830699333,4cyclictest81rcu_preempt10:06:231
1830699332,4cyclictest81rcu_preempt09:21:411
18306993323,7cyclictest0-21swapper/111:58:561
18306993323,6cyclictest13916-21ssh10:36:171
1830699331,29cyclictest21340-21fschecks_count07:30:161
18306993310,19cyclictest0-21swapper/109:32:031
18305993326,4cyclictest0-21swapper/008:25:150
18305993317,7cyclictest0-21swapper/011:31:350
1830599331,30cyclictest0-21swapper/009:57:160
1830599331,30cyclictest0-21swapper/007:29:160
18305993312,8cyclictest0-21swapper/009:19:520
1830599331,21cyclictest26969-21diskstats07:45:130
18305993310,7cyclictest11775-21df_inode08:30:130
18305993310,11cyclictest0-21swapper/009:50:290
304712321,28sleep030515-21cut07:55:000
283962321,5sleep00-21swapper/010:18:270
1830699327,14cyclictest40550irq/92-i91507:50:251
1830699323,5cyclictest81rcu_preempt12:15:461
1830699323,4cyclictest81rcu_preempt12:05:491
1830699321,27cyclictest1968-21lldpad12:48:411
1830599329,19cyclictest0-21swapper/011:24:560
1830599326,9cyclictest0-21swapper/009:41:320
18305993225,5cyclictest0-21swapper/011:17:560
1830599322,17cyclictest0-21swapper/008:41:410
1830599321,4cyclictest81rcu_preempt10:39:070
1830599321,29cyclictest0-21swapper/012:33:160
1830599321,29cyclictest0-21swapper/012:21:150
1830599321,29cyclictest0-21swapper/007:55:360
1830599321,19cyclictest13740-21ssh12:50:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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