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2026-08-30 - 13:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot4s.osadl.org (updated Sun Aug 30, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1252308994641,4cyclictest1512270-21apt-get23:20:122
1252306994337,5cyclictest1413033-21store21:45:011
1252308994036,3cyclictest1527563-21gpgv23:35:002
1252306994033,5cyclictest335557-21systemd-journal00:35:011
1252306993832,4cyclictest1345902-21apt-get20:40:101
1252306993522,11cyclictest1396442-21ntpq21:25:211
1252312993429,4cyclictest1459819-21latency_hist22:30:013
1252306993429,3cyclictest1294274-21apt-get19:50:111
1252312993329,3cyclictest1376896-21kworker/u8:2+flush-259:021:35:003
1252308993126,3cyclictest1486175-21kworker/u8:1+flush-259:023:40:162
1252312993026,3cyclictest1449227-21kworker/u8:0+flush-259:023:00:213
1252312993025,4cyclictest1480553-21latency_hist22:50:003
1252306992924,3cyclictest1449484-21latency_hist22:20:011
1252302992925,2cyclictest1517452-21apt-get23:25:120
1252312992825,2cyclictest1511743-21kworker/u8:0+flush-259:023:50:153
1252306992823,3cyclictest1585477-21apt-get00:30:131
1252302992721,4cyclictest1314667-21latency_hist20:10:000
1252308992620,4cyclictest1277161-21ntpq19:30:222
1252302992620,4cyclictest1548850-21apt-get23:55:130
1252306992514,10cyclictest335557-21systemd-journal23:15:001
1252302992521,3cyclictest1407665-21kworker/u8:4+flush-259:021:50:280
1252312992418,4cyclictest1252685-21diskstats19:10:133
1252302992417,5cyclictest1391313-21ntpq21:20:220
1252302992417,5cyclictest1391313-21ntpq21:20:210
1252308992320,2cyclictest1304355-21kworker/u8:2+flush-259:020:20:132
1252306992318,3cyclictest1376909-21/usr/sbin/munin21:10:151
1252306992310,11cyclictest1507183-21cpuspeed_turbos23:15:141
1252302992317,4cyclictest1580010-21latency_hist00:25:010
1252312992216,4cyclictest1575091-21/usr/sbin/munin00:20:143
125230899221,19cyclictest1402488-21unin-run21:35:002
1252306992210,1cyclictest1319723-21pool-/usr/bin/f20:13:571
1252302992217,4cyclictest1340724-21apt-get20:35:090
1252312992119,1cyclictest0-21swapper/322:20:003
1252312992117,3cyclictest1268007-21/usr/sbin/munin19:25:143
1252312992115,4cyclictest1580246-21/usr/sbin/munin00:25:203
1252308992117,3cyclictest1449227-21kworker/u8:0+flush-259:023:00:152
125230699219,2cyclictest1424007-21cpuspeed_turbos21:55:141
1252306992118,2cyclictest1273188-21apt-get19:30:131
1252302992118,2cyclictest0-21swapper/022:25:000
1252302992116,3cyclictest1543831-21diskstats23:50:120
1252302992115,4cyclictest1474428-21ntpq22:40:220
1252312992014,4cyclictest1590410-21apt-get00:35:003
1252306992016,3cyclictest1376896-21kworker/u8:2+flush-259:021:50:001
1252306992015,3cyclictest1251383-21kworker/u8:0+flush-259:019:15:171
1252302992017,2cyclictest1486161-21sh22:55:000
125230299201,18cyclictest1-21systemd21:04:070
1252312991916,1cyclictest0-21swapper/322:15:003
1252312991914,4cyclictest335557-21systemd-journal20:11:063
1252312991914,4cyclictest335557-21systemd-journal20:00:003
1252306991915,3cyclictest1304578-21/usr/sbin/munin20:00:131
1252306991912,5cyclictest1360238-21ntpq20:50:211
1252302991915,3cyclictest1325226-21/usr/sbin/munin20:20:190
1252312991816,1cyclictest0-21swapper/323:20:003
1252312991815,2cyclictest1419135-21irqcore21:50:163
1252312991814,3cyclictest1460060-21/usr/sbin/munin22:30:143
1252308991816,1cyclictest1585191-21idleruntime-cro00:30:002
1252312991714,2cyclictest1291415-21kthreadcore19:45:173
1252312991714,2cyclictest1289093-21kworker/u8:0+flush-259:020:54:593
1252312991714,2cyclictest1252297-21cyclictest20:40:003
125230899177,4cyclictest1366308-21munin-run21:00:002
1252306991714,2cyclictest1-21systemd00:27:541
1252302991714,2cyclictest60350irq/132-enp0s29f1:rx-020:10:150
1252302991714,2cyclictest1299448-21apt-get19:55:110
1252302991713,2cyclictest1387026-21unin-run21:20:000
1252302991711,5cyclictest1511162-21ntpq23:15:230
125231299168,6cyclictest1375742-21ntpq21:05:203
1252312991613,2cyclictest1527812-21latency_hist23:35:013
1252312991613,2cyclictest1252297-21cyclictest21:15:243
1252312991611,4cyclictest1490475-21ntpq22:55:223
1252312991610,4cyclictest1528299-21diskstats23:35:143
1252312991610,4cyclictest1528299-21diskstats23:35:143
1252308991614,1cyclictest1574843-21idleruntime-cro00:20:002
1252308991614,1cyclictest0-21swapper/219:29:592
1252308991613,2cyclictest0-21swapper/220:15:002
1252308991611,4cyclictest1480583-21gpgv22:50:002
1252308991611,4cyclictest1283862-21cat19:40:002
1252306991613,2cyclictest1332724-21kthreadcore20:25:181
1252306991611,3cyclictest1387011-21basename21:19:591
1252302991614,1cyclictest60350irq/132-enp0s29f1:rx-000:29:270
1252302991613,2cyclictest60350irq/132-enp0s29f1:rx-023:45:150
1252302991613,2cyclictest60350irq/132-enp0s29f1:rx-021:12:020
1252302991613,2cyclictest60350irq/132-enp0s29f1:rx-020:47:270
1252302991613,2cyclictest60350irq/132-enp0s29f1:rx-020:25:210
1252302991613,2cyclictest1434290-21apt-get22:05:120
1252302991612,3cyclictest1559633-21apt-get00:05:130
1252302991612,3cyclictest1289093-21kworker/u8:0+flush-259:020:20:010
1252302991611,4cyclictest1335744-21diskstats20:30:130
1252312991513,1cyclictest0-21swapper/322:25:003
1252312991512,2cyclictest1519729-21kthreadcore23:25:183
1252312991512,1cyclictest1475371-21turbostat22:45:013
1252312991511,3cyclictest1486175-21kworker/u8:1+flush-259:000:05:183
1252312991510,3cyclictest1549027-21cut23:55:163
1252312991510,3cyclictest1538243-21kworker/u8:3+events_unbound00:00:183
1252308991512,2cyclictest1560655-21kthreadcore00:05:192
1252308991512,2cyclictest1540800-21kthreadcore23:45:182
1252308991512,2cyclictest1429051-21kworker/u8:2+flush-259:022:15:172
1252308991511,3cyclictest335557-21systemd-journal23:18:102
125230699159,4cyclictest1543407-21latency_hist23:50:001
1252306991512,2cyclictest1476036-21irqcore22:45:171
125230299159,4cyclictest335557-21systemd-journal19:26:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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