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2026-04-25 - 14:08

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 Sat Apr 25, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
120339912541235,15cyclictest25810-21strings21:15:231
120339911631148,10cyclictest0-21swapper/119:25:111
118552575532,29sleep10-21swapper/119:23:421
117492499416,31sleep00-21swapper/019:22:340
1203299197176,16cyclictest0-21swapper/021:15:230
1203299124100,20cyclictest0-21swapper/019:25:110
153042790,4sleep041ktimersoftd/019:30:200
144582730,5sleep0111rcuc/023:17:360
198452690,8sleep01203299cyclictest22:15:400
173572670,2sleep117358-21ntp_kernel_err19:35:221
165232501,37sleep016594-21cut21:00:140
1203299481,16cyclictest22693-21cut00:00:100
1203399447,25cyclictest0-21swapper/122:25:461
68122420,3sleep041ktimersoftd/020:35:110
285962410,2sleep028598-21idleruntime-cro00:40:000
12033994121,5cyclictest22-21ksoftirqd/121:30:141
12033994121,5cyclictest22-21ksoftirqd/121:30:131
12033994121,5cyclictest22-21ksoftirqd/120:35:121
1203399411,6cyclictest22-21ksoftirqd/122:06:021
51452401,35sleep05155-21ssh23:40:570
32312401,35sleep13245-21sh22:32:291
305282401,34sleep030536-21ssh23:34:540
1203399408,6cyclictest22-21ksoftirqd/120:07:251
1203399401,4cyclictest22-21ksoftirqd/100:15:331
12032994010,15cyclictest2225-21dbus-daemon22:36:100
1203399393,4cyclictest22-21ksoftirqd/123:19:441
12033993933,4cyclictest137450irq/90-eth022:13:241
12033993921,7cyclictest22-21ksoftirqd/121:55:191
12033993919,6cyclictest22-21ksoftirqd/122:40:171
1203399391,7cyclictest22-21ksoftirqd/122:55:281
1203399391,7cyclictest22-21ksoftirqd/121:21:591
1203399391,6cyclictest22-21ksoftirqd/100:10:141
1203399391,4cyclictest22-21ksoftirqd/121:42:431
1203399391,4cyclictest22-21ksoftirqd/100:28:211
12032993916,5cyclictest9664-21users23:45:320
1203399389,4cyclictest81rcu_preempt19:40:131
12033993818,9cyclictest22-21ksoftirqd/123:56:481
12033993818,9cyclictest22-21ksoftirqd/123:56:481
1203399381,7cyclictest22-21ksoftirqd/123:40:191
1203399381,7cyclictest22-21ksoftirqd/123:30:101
1203399381,7cyclictest22-21ksoftirqd/122:45:241
1203399381,7cyclictest22-21ksoftirqd/122:35:111
1203399381,7cyclictest22-21ksoftirqd/122:15:251
1203399381,7cyclictest22-21ksoftirqd/121:45:201
1203399381,7cyclictest22-21ksoftirqd/121:35:181
1203399381,7cyclictest22-21ksoftirqd/100:30:321
1203399381,7cyclictest22-21ksoftirqd/100:20:121
1203399381,5cyclictest22-21ksoftirqd/120:25:261
1203299382,22cyclictest24079-21ntp_states22:20:230
320052370,8sleep01203299cyclictest21:21:340
12033993732,3cyclictest137450irq/90-eth000:08:381
1203399372,4cyclictest22-21ksoftirqd/122:04:481
1203399371,7cyclictest22-21ksoftirqd/123:50:121
1203399371,7cyclictest22-21ksoftirqd/119:55:201
1203399371,7cyclictest22-21ksoftirqd/100:45:161
1203399371,7cyclictest22-21ksoftirqd/100:00:201
1203399371,6cyclictest22-21ksoftirqd/123:20:231
1203399371,6cyclictest22-21ksoftirqd/123:20:221
1203399371,6cyclictest22-21ksoftirqd/123:10:101
1203399371,6cyclictest22-21ksoftirqd/123:05:161
1203399371,6cyclictest22-21ksoftirqd/120:40:171
1203399371,6cyclictest22-21ksoftirqd/100:40:231
228662361,31sleep022904-21/usr/sbin/munin19:50:210
148812361,4sleep114922-21iostat20:55:201
12033993630,4cyclictest137450irq/90-eth023:38:291
12033993630,4cyclictest137450irq/90-eth021:11:011
1203399361,6cyclictest22-21ksoftirqd/123:45:161
1203399361,6cyclictest22-21ksoftirqd/122:50:151
1203399361,6cyclictest22-21ksoftirqd/120:15:211
1203399361,5cyclictest22-21ksoftirqd/121:53:021
1203399361,5cyclictest22-21ksoftirqd/120:30:181
1203299362,21cyclictest12280-21df_inode21:35:140
207092351,30sleep020719-21ssh00:30:320
1203399351,6cyclictest22-21ksoftirqd/120:20:101
12032993511,6cyclictest1171-21aten_r4power_vo00:45:110
12032993511,5cyclictest13041-21kworker/0:223:05:230
12032993510,6cyclictest27803-21df_inode00:05:130
1203399341,6cyclictest22-21ksoftirqd/121:26:221
12033993416,5cyclictest22-21ksoftirqd/123:29:561
12033993411,4cyclictest81rcu_preempt20:00:231
1203299342,17cyclictest4463-21iostat22:00:200
1203299342,16cyclictest14981-21hddtemp_smartct00:25:180
272112330,8sleep11203399cyclictest22:24:201
1203399334,9cyclictest22-21ksoftirqd/100:55:011
1203399332,4cyclictest22-21ksoftirqd/120:52:111
1203399332,10cyclictest0-21swapper/119:45:241
1203399331,5cyclictest3286-21runrttasks20:10:201
1203299339,4cyclictest0-21swapper/022:30:250
1203299336,4cyclictest81rcu_preempt21:50:500
1203299335,4cyclictest81rcu_preempt22:50:280
1203299334,4cyclictest81rcu_preempt21:10:440
1203299333,4cyclictest81rcu_preempt21:30:010
12032993314,4cyclictest0-21swapper/022:12:190
256502321,5sleep00-21swapper/019:58:240
250992321,27sleep00-21swapper/023:29:000
12033993211,4cyclictest81rcu_preempt19:30:221
1203399321,10cyclictest30167-21sh23:00:221
1203299329,6cyclictest10612-21ssh21:33:260
1203299329,6cyclictest10612-21ssh21:33:260
1203299326,13cyclictest19826-21diskmemload23:00:110
1203299324,4cyclictest81rcu_preempt21:55:400
1203299323,4cyclictest81rcu_preempt23:35:280
1203299323,4cyclictest81rcu_preempt23:10:590
1203299323,4cyclictest81rcu_preempt22:28:320
1203299323,4cyclictest81rcu_preempt21:42:470
1203299323,4cyclictest81rcu_preempt00:16:560
1203299323,4cyclictest81rcu_preempt00:11:120
1203299321,19cyclictest17301-21needreboot19:35:210
1203399318,4cyclictest81rcu_preempt21:00:291
12033993115,4cyclictest22-21ksoftirqd/100:39:111
12033993113,4cyclictest81rcu_preempt21:05:141
1203299316,12cyclictest9305-21irqstats22:05:200
1203299313,4cyclictest81rcu_preempt23:57:560
1203299313,4cyclictest81rcu_preempt23:57:560
1203299313,4cyclictest81rcu_preempt22:44:470
1203299313,4cyclictest81rcu_preempt21:45:370
1203299313,4cyclictest81rcu_preempt00:44:220
1203299313,4cyclictest81rcu_preempt00:24:100
1203299312,4cyclictest81rcu_preempt23:52:390
1203299311,4cyclictest81rcu_preempt23:23:000
1203299311,4cyclictest81rcu_preempt23:22:590
12032993111,7cyclictest0-21swapper/020:09:240
197082301,5sleep00-21swapper/021:08:580
1203299307,9cyclictest29108-21ssh23:00:000
1203299307,6cyclictest0-21swapper/020:29:500
1203299304,4cyclictest81rcu_preempt00:50:070
12032993011,6cyclictest15363-21/usr/sbin/munin22:45:180
99872291,5sleep00-21swapper/020:40:410
25232291,5sleep00-21swapper/020:22:080
1203299292,14cyclictest12920-21perl20:50:160
1203299292,13cyclictest30859-21/usr/sbin/munin20:10:290
1203299291,4cyclictest81rcu_preempt19:45:130
1203299291,14cyclictest5606-21memory20:30:220
6642281,5sleep00-21swapper/020:17:560
222122281,5sleep122252-21aten_r4power_en19:50:111
159092281,5sleep00-21swapper/020:58:380
1203399282,4cyclictest81rcu_preempt20:45:151
1203299289,6cyclictest2221-21cron20:50:000
1203299281,13cyclictest26380-21/usr/sbin/munin20:00:160
1203299271,14cyclictest19200-21grep19:40:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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