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2026-08-11 - 19:03

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 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 Aug 11, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
282353821380,4sleep3411rcuc/307:30:213
281369921070,8sleep20-21swapper/207:05:212
139099920,74rtkit-daemon0-21swapper/007:05:240
28920352900,2sleep00-21swapper/010:45:220
281408127741,13sleep30-21swapper/307:05:553
28370422650,3sleep10-21swapper/108:10:131
281405226344,13sleep10-21swapper/107:05:331
28764352470,4sleep13056-21PK-Backend10:00:241
28304212440,4sleep13056-21PK-Backend07:50:191
28191902360,4sleep13056-21PK-Backend07:20:131
28471392300,8sleep013-21ksoftirqd/008:38:390
2814605993025,4cyclictest13-21ksoftirqd/009:05:010
28354372250,3sleep234-21ksoftirqd/208:05:132
28848492240,1sleep10-21swapper/110:25:191
2814612992416,6cyclictest2903270-21cron11:20:012
139099240,16rtkit-daemon3056-21PK-Backend09:51:451
139099240,15rtkit-daemon3056-21PK-Backend09:20:311
28272812230,5sleep30-21swapper/307:40:203
2814605992321,1cyclictest0-21swapper/007:16:270
2814617992220,1cyclictest0-21swapper/309:05:293
281461799220,20cyclictest2924826-21irqstats12:20:153
281461299220,19cyclictest0-21swapper/207:41:142
2814609992220,1cyclictest0-21swapper/110:40:411
2814609992218,3cyclictest2850740-21munin-plugin-st08:49:591
2814605992220,1cyclictest0-21swapper/010:16:270
2814605992219,2cyclictest0-21swapper/007:58:250
2814605992216,4cyclictest2884465-21expr10:25:140
139099220,14rtkit-daemon3056-21PK-Backend10:09:391
139099220,14rtkit-daemon3056-21PK-Backend07:25:191
2814617992119,1cyclictest3056-21PK-Backend12:35:443
2814617992119,1cyclictest3056-21PK-Backend10:53:363
2814617992119,1cyclictest3056-21PK-Backend10:44:453
2814617992119,1cyclictest3056-21PK-Backend08:40:343
2814617992119,1cyclictest0-21swapper/310:17:343
2814617992119,1cyclictest0-21swapper/308:28:513
2814617992119,1cyclictest0-21swapper/307:29:033
2814617992119,1cyclictest0-21swapper/307:12:133
2814617992118,2cyclictest3056-21PK-Backend10:45:333
281461799210,20cyclictest3056-21PK-Backend08:56:563
281461799210,20cyclictest0-21swapper/310:04:373
281461799210,20cyclictest0-21swapper/307:46:333
281461799210,20cyclictest0-21swapper/307:46:333
281461799210,19cyclictest3056-21PK-Backend08:37:233
2814612992119,1cyclictest0-21swapper/211:54:152
2814612992111,8cyclictest2924096-21perf12:20:012
2814609992119,1cyclictest3056-21PK-Backend11:17:191
2814609992119,1cyclictest3056-21PK-Backend10:21:491
2814609992119,1cyclictest3056-21PK-Backend10:14:591
2814609992119,1cyclictest3056-21PK-Backend09:36:341
2814609992119,1cyclictest3056-21PK-Backend09:28:361
2814609992119,1cyclictest0-21swapper/112:25:261
2814609992119,1cyclictest0-21swapper/111:57:281
2814609992119,1cyclictest0-21swapper/111:52:271
2814609992119,1cyclictest0-21swapper/111:04:141
2814609992119,1cyclictest0-21swapper/110:46:371
2814609992119,1cyclictest0-21swapper/109:05:041
2814609992119,1cyclictest0-21swapper/109:03:421
2814609992119,1cyclictest0-21swapper/108:56:321
2814609992119,1cyclictest0-21swapper/108:35:231
2814609992119,1cyclictest0-21swapper/108:33:001
281460999210,20cyclictest3056-21PK-Backend08:29:151
281460999210,20cyclictest0-21swapper/112:36:131
281460999210,20cyclictest0-21swapper/111:06:371
281460999210,19cyclictest3056-21PK-Backend12:13:501
281460999210,19cyclictest3056-21PK-Backend11:26:591
281460999210,19cyclictest3056-21PK-Backend11:12:461
281460999210,19cyclictest3056-21PK-Backend07:17:091
2814605992119,1cyclictest0-21swapper/012:39:110
2814605992119,1cyclictest0-21swapper/012:12:400
2814605992119,1cyclictest0-21swapper/011:40:490
2814605992119,1cyclictest0-21swapper/011:20:430
2814605992119,1cyclictest0-21swapper/011:17:310
2814605992119,1cyclictest0-21swapper/010:57:040
2814605992119,1cyclictest0-21swapper/010:39:050
2814605992119,1cyclictest0-21swapper/009:25:030
2814605992119,1cyclictest0-21swapper/009:20:570
2814605992119,1cyclictest0-21swapper/008:43:540
2814605992119,1cyclictest0-21swapper/008:31:230
2814605992119,1cyclictest0-21swapper/008:29:470
2814605992119,1cyclictest0-21swapper/008:24:270
2814605992119,1cyclictest0-21swapper/008:18:320
2814605992119,1cyclictest0-21swapper/008:14:470
2814605992119,1cyclictest0-21swapper/007:50:540
2814605992119,1cyclictest0-21swapper/007:33:230
2814605992116,3cyclictest2896983-21df_inode11:00:150
281460599210,20cyclictest0-21swapper/011:13:320
281460599210,20cyclictest0-21swapper/010:33:110
281460599210,20cyclictest0-21swapper/010:12:080
281460599210,20cyclictest0-21swapper/010:09:590
139099210,14rtkit-daemon3056-21PK-Backend09:58:461
139099210,14rtkit-daemon0-21swapper/107:57:521
2814617992018,1cyclictest3056-21PK-Backend09:04:073
2814617992018,1cyclictest0-21swapper/312:05:233
2814617992018,1cyclictest0-21swapper/311:23:243
2814617992018,1cyclictest0-21swapper/311:05:203
2814617992018,1cyclictest0-21swapper/310:36:413
2814617992018,1cyclictest0-21swapper/308:31:143
2814617992018,1cyclictest0-21swapper/308:03:093
2814617992015,3cyclictest978-21snmpd11:28:013
2814617992015,3cyclictest2928564-21ntp_states12:30:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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