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2026-04-22 - 13:03

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 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 Wed Apr 22, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
271235121070,3sleep3411rcuc/320:36:353
276035521060,3sleep20-21swapper/222:55:162
139099840,68rtkit-daemon0-21swapper/319:05:233
268061827049,13sleep10-21swapper/119:10:001
268038326747,14sleep20-21swapper/219:07:012
268027126651,9sleep00-21swapper/019:05:330
27555172540,2sleep10-21swapper/122:40:201
27304592480,2sleep00-21swapper/021:30:130
27710622400,4sleep00-21swapper/023:25:170
27034112350,8sleep0131ksoftirqd/020:10:210
2680779992612,12cyclictest2749308-21idleruntime-cro22:25:010
2680789992511,12cyclictest2777318-21unin-run23:45:013
27634282240,9sleep013-21ksoftirqd/023:05:120
268077999240,22cyclictest2778051-21sed23:45:160
27920842230,2sleep10-21swapper/100:25:131
26940432230,4chrt3056-21PK-Backend19:45:131
268078999230,21cyclictest2682720-21python319:15:023
268078299230,21cyclictest3056-21PK-Backend20:39:391
139099230,15rtkit-daemon0-21swapper/223:39:112
268078999228,12cyclictest2756259-21unin-run22:45:013
2680789992220,1cyclictest3056-21PK-Backend23:30:193
2680789992220,1cyclictest3056-21PK-Backend22:32:403
2680789992220,1cyclictest3056-21PK-Backend21:15:203
2680789992220,1cyclictest0-21swapper/320:11:393
2680789992219,2cyclictest3056-21PK-Backend23:05:253
268078999220,20cyclictest3056-21PK-Backend23:15:123
268078999220,20cyclictest3056-21PK-Backend22:53:503
2680782992220,1cyclictest3056-21PK-Backend21:05:071
2680782992220,1cyclictest3056-21PK-Backend19:25:371
2680782992220,1cyclictest0-21swapper/123:35:201
2680782992214,7cyclictest2780084-21ps23:50:191
2680782992210,9cyclictest2791174-21cron00:25:001
2680779992220,1cyclictest0-21swapper/023:20:560
2680779992220,1cyclictest0-21swapper/021:18:210
139099220,16rtkit-daemon3056-21PK-Backend22:38:513
27058682210,4sleep13056-21PK-Backend20:20:011
2680789992119,1cyclictest3056-21PK-Backend23:27:153
2680789992119,1cyclictest3056-21PK-Backend23:13:093
2680789992119,1cyclictest3056-21PK-Backend22:57:413
2680789992119,1cyclictest3056-21PK-Backend00:17:583
2680789992119,1cyclictest0-21swapper/323:59:333
2680789992119,1cyclictest0-21swapper/322:46:053
2680789992119,1cyclictest0-21swapper/322:05:163
2680789992119,1cyclictest0-21swapper/320:54:323
2680789992119,1cyclictest0-21swapper/320:46:343
2680789992119,1cyclictest0-21swapper/319:51:113
2680789992119,1cyclictest0-21swapper/319:48:553
2680789992119,1cyclictest0-21swapper/319:34:423
2680789992119,1cyclictest0-21swapper/300:02:373
2680789992114,4cyclictest2697679-21diskstats19:55:153
268078999211,12cyclictest27213222awk21:05:013
268078999211,12cyclictest27213222awk21:05:003
268078999210,20cyclictest0-21swapper/319:38:003
268078999210,20cyclictest0-21swapper/319:24:013
2680785992119,1cyclictest0-21swapper/220:19:492
2680785992114,5cyclictest2689795-21sshd19:31:142
2680785992112,7cyclictest2706362-21fw_packets20:20:152
268078599210,20cyclictest0-21swapper/223:41:122
268078599210,20cyclictest0-21swapper/223:14:082
268078599210,19cyclictest0-21swapper/223:05:092
268078299212,17cyclictest2740638-21perf22:00:001
2680782992119,1cyclictest3056-21PK-Backend21:45:431
2680782992119,1cyclictest3056-21PK-Backend20:12:211
2680782992119,1cyclictest3056-21PK-Backend00:37:531
2680782992119,1cyclictest0-21swapper/123:33:171
2680782992119,1cyclictest0-21swapper/123:29:121
2680782992119,1cyclictest0-21swapper/121:11:021
2680782992119,1cyclictest0-21swapper/100:16:371
2680782992119,1cyclictest0-21swapper/100:00:281
2680782992118,2cyclictest3056-21PK-Backend21:25:491
2680782992118,2cyclictest3056-21PK-Backend19:52:201
2680782992111,7cyclictest436-20systemd-journal21:20:011
268078299210,20cyclictest3056-21PK-Backend23:57:241
268078299210,20cyclictest3056-21PK-Backend22:24:501
268078299210,20cyclictest3056-21PK-Backend20:23:231
268078299210,20cyclictest3056-21PK-Backend19:31:591
268078299210,20cyclictest0-21swapper/122:35:591
268078299210,19cyclictest3056-21PK-Backend20:27:151
268078299210,19cyclictest3056-21PK-Backend19:11:391
2680779992119,1cyclictest0-21swapper/023:53:280
2680779992119,1cyclictest0-21swapper/023:15:490
2680779992119,1cyclictest0-21swapper/022:44:260
2680779992119,1cyclictest0-21swapper/022:33:520
2680779992119,1cyclictest0-21swapper/022:01:470
2680779992119,1cyclictest0-21swapper/022:01:470
2680779992119,1cyclictest0-21swapper/021:58:570
2680779992119,1cyclictest0-21swapper/021:37:140
2680779992119,1cyclictest0-21swapper/020:53:540
2680779992119,1cyclictest0-21swapper/020:37:250
2680779992119,1cyclictest0-21swapper/020:33:330
2680779992119,1cyclictest0-21swapper/020:22:450
2680779992119,1cyclictest0-21swapper/020:00:070
2680779992119,1cyclictest0-21swapper/019:40:200
2680779992119,1cyclictest0-21swapper/019:38:030
2680779992119,1cyclictest0-21swapper/019:24:050
2680779992119,1cyclictest0-21swapper/000:39:170
268077999210,20cyclictest0-21swapper/021:41:060
268077999210,20cyclictest0-21swapper/020:55:570
268077999210,20cyclictest0-21swapper/019:58:520
268077999210,20cyclictest0-21swapper/019:17:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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