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2026-05-19 - 08:53

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 May 19, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125627621390,4sleep20-21swapper/222:25:122
124130521310,3sleep33056-21PK-Backend21:40:183
124814121230,2sleep33056-21PK-Backend22:00:193
120503921160,3sleep053-21kcompactd019:56:580
128164621100,3sleep20-21swapper/223:35:182
118706627439,29sleep20-21swapper/219:09:332
118702727339,28sleep30-21swapper/319:09:023
118676226244,13sleep00-21swapper/019:05:370
118542226141,14sleep10-21swapper/119:05:021
12560592480,2sleep33056-21PK-Backend22:25:013
12446902420,3sleep3411rcuc/321:50:173
13036062410,3sleep10-21swapper/100:40:011
12229012380,2sleep00-21swapper/020:50:110
118723399343,13cyclictest0-21swapper/021:35:000
118723399343,13cyclictest0-21swapper/021:35:000
118723399319,9cyclictest1271797-21runrttasks23:08:090
118723399318,5cyclictest1214204-21/usr/sbin/munin20:25:200
118723399298,7cyclictest1209037-21wc20:10:120
118723399294,14cyclictest1302334-21df00:35:130
12686852280,2sleep20-21swapper/223:00:012
118723399286,8cyclictest1273364-21chrt23:11:020
118723399285,13cyclictest0-21swapper/021:10:520
118723399285,11cyclictest1251266-21df22:10:130
118723399285,10cyclictest1233678-21diskstats21:20:130
118723399284,8cyclictest1289310-21munin-run00:00:000
1187238992722,4cyclictest26-21ksoftirqd/100:30:001
118723399277,11cyclictest1297804-21chrt00:22:550
118723399274,13cyclictest0-21swapper/023:45:310
118723399273,15cyclictest0-21swapper/022:55:130
118723399273,14cyclictest0-21swapper/000:25:010
118723399272,6cyclictest0-21swapper/020:05:110
1187233992715,7cyclictest1187446-21apt19:10:120
118723399266,7cyclictest1213-21kerneloops23:52:430
118723399266,10cyclictest1191042-21chrt19:19:000
118723399265,8cyclictest1247837-21hddtemp_smartct22:00:160
118723399265,7cyclictest1220644-21sshd20:41:540
118723399265,12cyclictest0-21swapper/000:08:110
118723399264,14cyclictest0-21swapper/021:29:280
118723399263,7cyclictest1-21systemd20:40:000
118723399263,7cyclictest1-21systemd20:40:000
1187238992520,4cyclictest26-21ksoftirqd/120:55:001
118723399258,5cyclictest1221161-21acpi20:45:110
118723399258,5cyclictest1194418-21chrt19:27:340
118723399256,7cyclictest0-21swapper/022:48:240
118723399255,8cyclictest0-21swapper/019:40:040
118723399254,9cyclictest1280948-21cpu23:35:110
118723399254,8cyclictest1233035-21latency_hist21:20:010
118723399253,9cyclictest886-21NetworkManager19:50:000
118723399252,9cyclictest0-21swapper/022:35:130
118723399252,9cyclictest0-21swapper/022:35:120
118723399252,14cyclictest0-21swapper/000:15:180
1187233992514,8cyclictest1266495-21perf22:55:000
139099240,3rtkit-daemon1389-21rtkit-daemon21:20:532
118723899240,22cyclictest1256208-21cat22:25:121
118723399245,8cyclictest1095-21runrttasks21:07:270
118723399245,7cyclictest0-21swapper/022:43:230
118723399244,8cyclictest0-21swapper/020:04:200
118723399242,14cyclictest0-21swapper/022:25:200
1187233992415,6cyclictest2156-21gnome-shell23:15:080
1187243992313,9cyclictest1216678-21ntp_kernel_err20:30:183
1187240992321,1cyclictest0-21swapper/222:07:312
1187240992321,1cyclictest0-21swapper/219:34:412
1187240992315,6cyclictest1209387-21df20:10:132
118723899235,5cyclictest26-21ksoftirqd/121:35:011
118723899235,5cyclictest26-21ksoftirqd/121:35:001
118723899230,5cyclictest1198403-21apt-config19:40:011
118723399235,5cyclictest0-21swapper/022:21:080
118723399234,7cyclictest0-21swapper/020:33:510
118723399234,6cyclictest0-21swapper/000:00:220
118723399233,12cyclictest0-21swapper/021:50:100
1187233992318,3cyclictest1276433-21/usr/sbin/munin23:20:190
1187233992316,4cyclictest1-21systemd21:35:070
1187233992315,4cyclictest1246563-21python321:55:200
1187233992315,3cyclictest1268762-21apt23:00:120
1187233992313,7cyclictest1195306-21/usr/sbin/munin19:30:160
1187243992219,2cyclictest3056-21PK-Backend00:07:183
1187243992218,2cyclictest3056-21PK-Backend23:25:003
1187243992214,6cyclictest1289979-21fw_packets00:00:163
1187243992213,7cyclictest1259293-21cron22:35:003
118724399220,20cyclictest3056-21PK-Backend20:58:593
1187240992220,1cyclictest0-21swapper/223:34:512
1187240992220,1cyclictest0-21swapper/223:34:512
1187240992220,1cyclictest0-21swapper/222:43:072
1187240992220,1cyclictest0-21swapper/222:31:312
1187240992220,1cyclictest0-21swapper/222:12:592
1187240992220,1cyclictest0-21swapper/220:52:552
1187240992220,1cyclictest0-21swapper/219:11:092
118724099220,21cyclictest0-21swapper/220:55:332
118723899222,5cyclictest26-21ksoftirqd/100:00:001
1187238992219,2cyclictest3056-21PK-Backend20:09:471
1187238992214,6cyclictest1229464-21sshd21:08:531
118723399227,13cyclictest1241212-21grep21:40:170
1187233992213,7cyclictest1284118-21idleruntime-cro23:45:000
1187233992213,6cyclictest1227845-21ls21:05:000
1187233992213,5cyclictest1293054-21apt00:10:130
1187233992212,8cyclictest2399-21gdbus19:38:030
1187233992212,6cyclictest1224613-21/usr/sbin/munin20:55:240
139099210,4rtkit-daemon1389-21rtkit-daemon23:42:412
118724399210,1cyclictest3056-21PK-Backend22:38:363
118724399210,1cyclictest3056-21PK-Backend22:38:363
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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