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2026-05-16 - 04:06

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 Sat May 16, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
372709121160,2sleep00-21swapper/021:20:210
367963827639,13sleep30-21swapper/319:06:593
367964626840,22sleep10-21swapper/119:07:051
367973026646,14sleep20-21swapper/219:08:112
367967026344,13sleep00-21swapper/019:07:240
37649362530,3sleep33056-21PK-Backend23:10:113
37470752480,4chrt3747077-21apt22:20:001
37837322420,1sleep20-21swapper/200:04:552
37742002390,4sleep20-21swapper/223:35:162
37096462370,3sleep10-21swapper/120:30:221
3679996992821,1cyclictest0-21swapper/323:34:523
367999199270,5cyclictest3056-21PK-Backend19:45:001
367999199254,9cyclictest3757826-21apt-config22:50:011
3679987992513,10cyclictest3713660-21unin-run20:45:000
367999399240,22cyclictest1389-21rtkit-daemon22:47:102
367999699234,17cyclictest3785751-21munin-plugin-st00:10:013
367999199235,5cyclictest3794018-21users00:30:211
367999199235,5cyclictest3783026-21ntp_states00:00:181
367999199234,6cyclictest3683506-21users19:15:221
367999199233,5cyclictest3690110-21ntp_states19:35:161
367999199232,7cyclictest3785145-21python300:05:211
3679991992321,1cyclictest0-21swapper/100:16:121
3679991992314,7cyclictest883-21dbus-daemon23:18:521
139099230,3rtkit-daemon0-21swapper/020:11:380
3679996992220,1cyclictest0-21swapper/322:51:323
3679996992220,1cyclictest0-21swapper/322:34:563
3679996992220,1cyclictest0-21swapper/322:34:563
3679996992220,1cyclictest0-21swapper/321:06:483
3679996992219,2cyclictest3056-21PK-Backend22:08:333
3679996992219,2cyclictest3056-21PK-Backend20:40:263
3679996992219,2cyclictest3056-21PK-Backend20:24:033
3679996992219,2cyclictest3056-21PK-Backend20:09:093
3679993992213,8cyclictest3792708-21unin-run00:30:002
367999199223,6cyclictest3781776-21taskset23:57:181
367999199223,6cyclictest3736418-21seq21:46:511
367999199222,5cyclictest1980-21gvfs-udisks2-vo21:18:031
3679991992220,1cyclictest0-21swapper/121:42:411
3679991992220,1cyclictest0-21swapper/120:16:161
3679991992215,5cyclictest3775063-21cron23:40:001
3679991992212,7cyclictest436-20systemd-journal19:30:001
367999199220,5cyclictest26-21ksoftirqd/122:46:141
367999199220,5cyclictest26-21ksoftirqd/100:38:381
3679987992220,1cyclictest0-21swapper/022:48:420
3679987992220,1cyclictest0-21swapper/022:30:030
3679987992220,1cyclictest0-21swapper/022:30:030
3679987992220,1cyclictest0-21swapper/020:57:220
3679987992220,1cyclictest0-21swapper/020:20:520
3679987992220,1cyclictest0-21swapper/019:44:080
3679987992220,1cyclictest0-21swapper/019:32:390
3679987992215,5cyclictest3724036-21munin-run21:15:010
3679987992214,6cyclictest3780262-21cron23:55:000
367998799220,21cyclictest3795052-21diskstats00:35:150
3679996992119,1cyclictest3056-21PK-Backend23:18:023
3679996992119,1cyclictest3056-21PK-Backend23:08:223
3679996992119,1cyclictest3056-21PK-Backend22:10:363
3679996992119,1cyclictest3056-21PK-Backend21:58:333
3679996992119,1cyclictest3056-21PK-Backend20:59:043
3679996992119,1cyclictest3056-21PK-Backend20:15:053
3679996992119,1cyclictest3056-21PK-Backend19:40:243
3679996992119,1cyclictest3056-21PK-Backend19:28:063
3679996992119,1cyclictest0-21swapper/319:24:003
3679996992119,1cyclictest0-21swapper/300:10:273
3679996992119,1cyclictest0-21swapper/300:10:273
3679996992119,1cyclictest0-21swapper/300:02:503
3679996992118,2cyclictest3056-21PK-Backend23:54:123
3679996992118,2cyclictest3056-21PK-Backend21:13:313
3679996992118,2cyclictest3056-21PK-Backend19:35:163
3679996992118,2cyclictest3056-21PK-Backend00:34:543
3679996992118,2cyclictest3056-21PK-Backend00:21:093
3679996992118,2cyclictest3056-21PK-Backend00:21:093
367999699210,19cyclictest3056-21PK-Backend20:25:043
3679993992112,7cyclictest3771006-21python323:25:212
367999399210,20cyclictest0-21swapper/222:37:542
367999199214,5cyclictest3718720-21seq20:58:511
367999199213,7cyclictest3697727-21taskset19:59:441
367999199213,6cyclictest3748418-21users22:20:221
367999199212,7cyclictest3700254-21kernelversion20:05:161
3679991992119,1cyclictest3056-21PK-Backend21:34:441
3679991992119,1cyclictest3056-21PK-Backend21:08:281
3679991992119,1cyclictest0-21swapper/123:45:441
3679991992119,1cyclictest0-21swapper/123:32:461
3679991992119,1cyclictest0-21swapper/122:11:551
3679991992119,1cyclictest0-21swapper/121:12:201
3679991992119,1cyclictest0-21swapper/119:20:051
3679991992116,3cyclictest3716706-21users20:50:231
367999199210,20cyclictest3056-21PK-Backend22:55:071
367999199210,20cyclictest0-21swapper/121:35:451
367999199210,20cyclictest0-21swapper/120:23:121
367999199210,1cyclictest0-21swapper/120:13:121
3679987992119,1cyclictest0-21swapper/023:42:090
3679987992119,1cyclictest0-21swapper/023:34:310
3679987992119,1cyclictest0-21swapper/023:27:080
3679987992119,1cyclictest0-21swapper/023:20:460
3679987992119,1cyclictest0-21swapper/022:06:300
3679987992119,1cyclictest0-21swapper/022:03:260
3679987992119,1cyclictest0-21swapper/021:59:210
3679987992119,1cyclictest0-21swapper/020:53:300
3679987992119,1cyclictest0-21swapper/020:02:060
3679987992119,1cyclictest0-21swapper/019:49:290
3679987992119,1cyclictest0-21swapper/019:27:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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