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2026-05-26 - 19:34

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 26, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125049222700,9sleep30-21swapper/307:05:143
132785321290,3sleep10-21swapper/110:40:231
131962421200,2sleep20-21swapper/210:20:102
128472321140,2sleep0181irq_work/008:40:110
139099760,61rtkit-daemon0-21swapper/107:08:211
125040127358,9sleep20-21swapper/207:05:142
125173826344,14sleep00-21swapper/007:08:410
12689472500,4sleep33056-21PK-Backend07:55:123
12711302480,2sleep33056-21PK-Backend08:00:173
13547892450,2sleep00-21swapper/012:00:130
12586102440,3sleep33056-21PK-Backend07:25:163
13370142430,4sleep00-21swapper/011:10:000
13305522430,3sleep10-21swapper/110:50:121
12871562390,3sleep10-21swapper/108:45:181
12640802390,4sleep23056-21PK-Backend07:40:152
13633332360,4sleep2331rcuc/212:25:022
125196199365,18cyclictest0-21swapper/209:15:062
13341842340,4chrt34-21ksoftirqd/211:00:172
13628712310,4chrt0-21swapper/112:20:221
1251961993014,14cyclictest1306027-21cut09:40:152
125196499292,24cyclictest1266846-21sh07:49:593
1251964992910,17cyclictest1308706-21cron09:50:003
13459052280,8sleep013-21ksoftirqd/011:35:110
1251964992811,15cyclictest1296519-21sshd09:14:273
13571992270,16chrt0-21swapper/012:05:230
125196499275,6cyclictest1337896-21grep11:10:183
1251964992710,15cyclictest1297598-21ntpq09:15:193
13445472260,4sleep33056-21PK-Backend11:30:123
125196499261,8cyclictest1275516-21idleruntime-cro08:14:593
125196199262,3cyclictest1280379-21python308:25:202
125196199261,23cyclictest1321114-21apt-get10:25:032
1251959992611,13cyclictest1334183-21/usr/sbin/munin11:00:171
139099250,17rtkit-daemon1268899-21/usr/sbin/munin07:55:111
12989782250,9sleep126-21ksoftirqd/109:20:141
12786512250,4sleep03056-21PK-Backend08:20:190
125196499258,3cyclictest1327053-21cstates10:40:133
125196499258,15cyclictest0-21swapper/310:25:023
125196499256,5cyclictest1276921-21grep08:15:203
1251964992511,13cyclictest1030-21sshd11:10:003
125196199259,15cyclictest1309467-21uname09:50:152
125196199251,4cyclictest1357799-21perf12:10:002
125196199250,23cyclictest1278516-21ntp_offset08:20:162
125196199250,1cyclictest0-21swapper/207:35:352
1251959992511,11cyclictest1255905-21unin-run07:20:011
1251955992515,9cyclictest1342502-21/usr/sbin/munin11:25:110
125196499246,3cyclictest1278430-21needreboot08:20:163
125196499241,9cyclictest1322015-21/usr/sbin/munin10:25:133
125196499241,8cyclictest436-20systemd-journal09:44:593
125196499241,7cyclictest1254544-21cpuspeed_turbos07:15:113
125196499241,7cyclictest1252362-21cpuspeed_turbos07:10:113
125196499241,6cyclictest1298731-21cpuspeed_turbos09:20:123
125196499241,5cyclictest1357801-21idleruntime-cro12:10:013
125196499240,22cyclictest13681942sleep312:36:403
125196499240,22cyclictest13626542sleep312:20:203
125196199249,13cyclictest1312707-21expr10:00:132
125196199248,14cyclictest1332229-21tr10:55:112
1251961992410,12cyclictest1298677-21cpuspeed_turbos09:20:112
125196199240,23cyclictest0-21swapper/207:51:572
125195999240,22cyclictest1314197-21grep10:05:131
1251955992415,7cyclictest883-21dbus-daemon10:42:240
139099230,14rtkit-daemon0-21swapper/108:30:161
12873302230,2sleep00-21swapper/008:45:210
125196499230,9cyclictest1310472-21idleruntime-cro09:55:003
125196499230,6cyclictest1312596-21cpuspeed_turbos10:00:133
125196499230,1cyclictest3056-21PK-Backend09:02:053
125196199238,13cyclictest1337831-21missed_timers11:10:172
125196199237,14cyclictest1336163-21needreboot11:05:172
125196199236,15cyclictest436-20systemd-journal07:25:002
125196199236,15cyclictest1308897-21cat09:50:002
125196199236,15cyclictest1293825-21awk09:05:142
125196199233,5cyclictest1254222-21sed07:15:022
1251961992317,4cyclictest0-21swapper/208:00:092
125196199231,6cyclictest1253065-21cat07:10:212
125196199230,22cyclictest0-21swapper/209:14:232
125196199230,21cyclictest1366178-21sed12:30:212
1251955992315,7cyclictest1317888-21/usr/sbin/munin10:15:090
139099220,14rtkit-daemon0-21swapper/011:14:550
125196499228,3cyclictest3056-21PK-Backend11:46:533
1251964992219,2cyclictest3056-21PK-Backend11:00:133
1251964992219,2cyclictest3056-21PK-Backend10:19:173
125196499221,8cyclictest1326574-21cron10:39:593
125196499221,8cyclictest1287921-21dump-pmu-power08:49:593
125196499221,6cyclictest1312200-21perf10:00:003
1251964992210,3cyclictest3056-21PK-Backend11:23:223
125196499220,20cyclictest3056-21PK-Backend09:38:483
125196499220,20cyclictest3056-21PK-Backend07:35:333
1251961992217,4cyclictest0-21swapper/211:49:102
125196199220,9cyclictest82332-21update-manager11:32:262
125196199220,7cyclictest1340466-21basename11:20:002
125196199220,4cyclictest1312203-21basename09:59:592
125195999220,21cyclictest0-21swapper/107:25:331
125195599222,17cyclictest1367675-21cut12:35:180
1251955992220,1cyclictest0-21swapper/010:55:080
1251955992220,1cyclictest0-21swapper/010:38:590
1251955992220,1cyclictest0-21swapper/010:30:410
1251955992220,1cyclictest0-21swapper/008:27:530
1251955992220,1cyclictest0-21swapper/007:28:460
1251955992218,3cyclictest1095-21runrttasks08:17:340
125195599220,3cyclictest1364595-21users12:25:190
125195599220,21cyclictest3056-21PK-Backend09:18:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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