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2026-06-24 - 02:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Tue Jun 23, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30471122700,21sleep3421ksoftirqd/307:10:003
30325722200,8sleep20-21swapper/207:05:132
35829021270,3sleep33056-21PK-Backend09:40:013
33190921140,4sleep13056-21PK-Backend08:25:011
30321728669,10sleep10-21swapper/107:05:131
30450727551,18sleep00-21swapper/007:08:050
3200312570,1chrt319645-21/usr/sbin/munin07:50:132
3922532500,3sleep10-21swapper/111:15:151
3603842370,1sleep10-21swapper/109:45:121
3939932290,3sleep0161rcuc/011:20:140
3518842260,4sleep33056-21PK-Backend09:20:163
139099250,17rtkit-daemon3056-21PK-Backend10:50:153
139099240,4rtkit-daemon0-21swapper/307:10:133
304799992314,7cyclictest419244-21cron12:35:013
30479999230,15cyclictest141rcu_preempt11:18:533
304795992314,7cyclictest343806-21users08:55:202
304790992321,1cyclictest0-21swapper/011:00:510
139099230,16rtkit-daemon3056-21PK-Backend07:32:053
304799992220,1cyclictest3056-21PK-Backend11:45:153
304799992218,3cyclictest311838-21chrt07:26:123
304799992216,4cyclictest42-21ksoftirqd/311:35:013
304799992216,4cyclictest375397-21latency_hist10:30:003
304795992220,1cyclictest0-21swapper/211:35:432
304795992220,1cyclictest0-21swapper/211:20:502
304795992220,1cyclictest0-21swapper/210:49:062
304790992220,1cyclictest0-21swapper/009:29:390
304790992220,1cyclictest0-21swapper/007:31:290
304790992219,2cyclictest0-21swapper/010:25:220
304790992213,7cyclictest379488-21df10:40:110
30479099220,21cyclictest306136-21chrt07:11:010
30479099220,1cyclictest0-21swapper/009:42:360
139099220,14rtkit-daemon3056-21PK-Backend07:40:133
139099220,14rtkit-daemon0-21swapper/309:07:173
304799992119,1cyclictest0-21swapper/312:22:253
304799992119,1cyclictest0-21swapper/310:08:423
304799992118,2cyclictest3056-21PK-Backend11:41:023
304799992118,2cyclictest3056-21PK-Backend11:06:213
304799992115,4cyclictest42-21ksoftirqd/312:20:013
304799992113,6cyclictest328975-21df08:15:133
304799992112,8cyclictest330320-21/usr/sbin/munin08:20:133
30479999210,20cyclictest3056-21PK-Backend10:38:373
30479999210,20cyclictest0-21swapper/310:20:253
30479999210,1cyclictest3056-21PK-Backend07:58:503
30479999210,1cyclictest3056-21PK-Backend07:58:503
30479999210,19cyclictest3056-21PK-Backend07:50:123
304795992119,1cyclictest0-21swapper/212:00:302
304795992119,1cyclictest0-21swapper/211:26:452
304795992119,1cyclictest0-21swapper/211:09:002
304795992119,1cyclictest0-21swapper/211:00:152
304795992119,1cyclictest0-21swapper/210:42:102
304795992119,1cyclictest0-21swapper/210:26:012
304795992119,1cyclictest0-21swapper/209:47:492
304795992119,1cyclictest0-21swapper/209:37:282
304795992119,1cyclictest0-21swapper/209:20:452
304795992119,1cyclictest0-21swapper/209:16:192
304795992119,1cyclictest0-21swapper/209:06:122
304795992119,1cyclictest0-21swapper/207:56:512
304795992119,1cyclictest0-21swapper/207:56:502
304795992114,5cyclictest365217-21cut10:00:012
304795992113,6cyclictest332940-21python308:25:222
30479599210,20cyclictest0-21swapper/212:38:442
30479599210,20cyclictest0-21swapper/208:35:162
30479599210,20cyclictest0-21swapper/208:14:342
30479599210,20cyclictest0-21swapper/207:44:122
30479599210,20cyclictest0-21swapper/207:25:272
30479599210,20cyclictest0-21swapper/207:18:242
30479599210,19cyclictest0-21swapper/210:53:332
304793992119,1cyclictest3056-21PK-Backend08:33:221
30479099218,4cyclictest13-21ksoftirqd/009:52:380
30479099218,4cyclictest13-21ksoftirqd/008:16:590
30479099218,4cyclictest13-21ksoftirqd/008:12:540
30479099217,5cyclictest13-21ksoftirqd/008:38:560
30479099217,5cyclictest13-21ksoftirqd/008:24:200
304790992119,1cyclictest0-21swapper/011:10:440
304790992119,1cyclictest0-21swapper/010:54:560
304790992119,1cyclictest0-21swapper/010:35:430
304790992119,1cyclictest0-21swapper/010:08:520
304790992119,1cyclictest0-21swapper/009:49:190
304790992119,1cyclictest0-21swapper/009:37:500
304790992119,1cyclictest0-21swapper/008:49:030
304790992119,1cyclictest0-21swapper/008:41:320
304790992119,1cyclictest0-21swapper/008:25:370
304790992118,2cyclictest0-21swapper/012:38:040
304790992113,6cyclictest324595-21cron08:05:000
304790992112,7cyclictest393261-21perf11:20:000
30479099210,20cyclictest0-21swapper/009:06:130
139099210,15rtkit-daemon3056-21PK-Backend11:10:173
139099210,14rtkit-daemon3056-21PK-Backend12:05:073
139099210,13rtkit-daemon0-21swapper/308:56:083
4007732200,4sleep00-21swapper/011:40:120
3604432200,4chrt3056-21PK-Backend09:45:143
30479999204,3cyclictest141rcu_preempt11:25:293
304799992018,1cyclictest3056-21PK-Backend10:47:153
304799992018,1cyclictest3056-21PK-Backend08:00:463
304799992018,1cyclictest0-21swapper/310:17:553
304799992018,1cyclictest0-21swapper/309:10:423
304799992018,1cyclictest0-21swapper/309:04:413
304799992018,1cyclictest0-21swapper/308:27:233
304799992017,2cyclictest3056-21PK-Backend07:36:473
304799992015,3cyclictest361928-21grep09:50:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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