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2026-01-05 - 02:39

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 Jan 04, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2255399993931,6cyclictest252-21systemd-journal11:05:001
2255399993627,6cyclictest2317340-21cp08:10:011
2255402992822,4cyclictest2353619-21apt-get08:45:002
2255402992822,4cyclictest2306933-21latency_hist08:00:022
2255399992824,2cyclictest2264625-21kworker/u8:2+flush-259:007:30:201
2255399992720,5cyclictest2576377-21ntpq12:15:241
2255397992724,2cyclictest2545526-21latency_hist11:50:010
2255397992723,3cyclictest2467341-21ntpq10:30:230
2255407992621,3cyclictest2317229-21apt-get08:10:003
2255397992623,2cyclictest2561531-21gpgv12:05:000
2255402992519,4cyclictest2255320-21latency_hist07:10:002
2255402992419,4cyclictest252-21systemd-journal12:21:292
2255397992418,4cyclictest2555819-21latency_hist12:00:010
2255407992317,4cyclictest2509511-21latency_hist11:15:003
2255402992317,4cyclictest2307175-21/usr/sbin/munin08:00:142
2255399992320,2cyclictest2260545-21turbostat.cron07:15:011
2255399992319,3cyclictest2281198-21kworker/u8:1+flush-259:007:45:171
2255399992317,4cyclictest2421630-21/usr/sbin/munin09:50:151
2255399992315,6cyclictest252-21systemd-journal09:30:011
2255397992318,4cyclictest2586687-21ntpq12:25:220
2255407992219,2cyclictest2447602-21cron10:15:013
2255399992219,2cyclictest2296677-21kworker/u8:0+events_unbound08:10:191
2255399992218,3cyclictest2374670-21kworker/u8:1+flush-259:009:34:591
225539999220,14cyclictest2519841-21sh11:24:591
2255397992216,5cyclictest2549811-21ntpq11:50:220
2255402992117,2cyclictest2545539-21sh11:50:002
2255402992117,2cyclictest0-21swapper/211:05:002
2255402992115,4cyclictest2380013-21gpgv09:10:012
2255399992118,2cyclictest2478751-21kworker/u8:4+flush-259:011:35:161
2255399992117,3cyclictest2234763-21kworker/u8:4+flush-259:007:20:201
2255399992116,4cyclictest2483969-21apt-get10:50:131
2255399992114,5cyclictest2363435-21ntpq08:50:211
2255397992118,2cyclictest2576983-21kworker/u8:3+events_unbound12:40:000
2255397992117,3cyclictest2416291-21kworker/u8:1+flush-259:010:10:260
2255407992016,3cyclictest2489129-21apt-get10:55:123
2255407992014,4cyclictest252-21systemd-journal11:25:003
2255402992015,3cyclictest2447600-21cron10:15:012
2255399992016,3cyclictest2509539-21kworker/u8:1+flush-259:011:15:261
2255399992016,3cyclictest2509539-21kworker/u8:1+events_unbound11:55:171
2255399992016,3cyclictest2374670-21kworker/u8:1+flush-259:009:20:181
2255397992015,4cyclictest2524068-21ntpq11:25:210
2255407991915,3cyclictest2264625-21kworker/u8:2+flush-259:007:50:003
225540799190,18cyclictest1-21systemd08:40:013
2255402991917,1cyclictest2374670-21kworker/u8:1+flush-259:009:30:332
2255402991914,4cyclictest2540434-21kworker/u8:2+flush-259:012:10:152
2255402991912,5cyclictest2395693-21latency_hist09:25:002
2255399991916,2cyclictest0-21swapper/109:10:011
2255399991915,3cyclictest2442308-21kworker/u8:0+events_unbound10:35:151
2255399991915,2cyclictest2296677-21kworker/u8:0+flush-259:008:00:201
2255397991917,1cyclictest2400833-21idleruntime-cro09:30:000
2255397991916,2cyclictest2494382-21cpuspeed_turbos11:00:150
2255397991912,5cyclictest2379912-21cp09:10:000
2255397991911,7cyclictest2296677-21kworker/u8:0+flush-259:008:15:000
2255407991815,2cyclictest2535609-21cpuspeed_turbos11:40:133
2255407991815,2cyclictest2264625-21kworker/u8:2+flush-259:008:30:173
2255402991814,3cyclictest2348432-21kworker/u8:0+flush-259:008:50:172
225539999189,6cyclictest252-21systemd-journal11:50:001
2255399991815,2cyclictest2364087-21kworker/u8:3+events_unbound09:40:191
2255399991815,2cyclictest2348467-21idleruntime-cro08:40:001
2255399991815,2cyclictest2264625-21kworker/u8:2+flush-259:009:05:001
2255399991815,2cyclictest0-21swapper/110:25:011
2255399991814,3cyclictest2555994-21kworker/u8:0+flush-259:012:05:001
2255397991815,1cyclictest2504352-21turbostat11:09:590
2255407991714,2cyclictest2520237-21cpuspeed_turbos11:25:123
2255399991714,2cyclictest2374670-21kworker/u8:1+events_unbound09:35:191
2255399991714,2cyclictest2296677-21kworker/u8:0+flush-259:008:25:191
2255399991713,3cyclictest2520103-21apt-get11:25:121
2255399991713,3cyclictest2364087-21kworker/u8:3+events_unbound10:10:191
2255399991713,2cyclictest2478751-21kworker/u8:4+events_unbound11:05:171
2255399991712,4cyclictest2416291-21kworker/u8:1+flush-259:009:55:301
2255399991710,5cyclictest2451900-21ntpq10:15:221
2255397991715,1cyclictest2426543-21idleruntime-cro09:55:000
2255397991715,1cyclictest0-21swapper/007:45:000
2255397991713,3cyclictest2264625-21kworker/u8:2+events_unbound07:50:210
2255397991712,4cyclictest252-21systemd-journal09:15:000
2255397991712,4cyclictest252-21systemd-journal09:15:000
2255397991711,4cyclictest2581507-21ntpq12:20:210
2255397991710,5cyclictest2442458-21latency_hist10:10:010
2255407991614,1cyclictest0-21swapper/312:05:013
2255407991613,2cyclictest2373828-21ntp_offset09:00:233
2255407991613,2cyclictest0-21swapper/312:00:003
2255407991612,3cyclictest2416291-21kworker/u8:1+events_unbound10:45:183
2255407991612,3cyclictest2333317-21apt-get08:25:123
2255407991610,3cyclictest2473366-21sh10:40:013
2255402991613,2cyclictest2323487-21irqcore08:15:182
2255402991612,3cyclictest2416291-21kworker/u8:1+flush-259:010:15:162
2255402991612,3cyclictest2264625-21kworker/u8:2+flush-259:008:45:182
2255402991611,3cyclictest1-21systemd10:55:212
2255402991610,4cyclictest2348466-21latency_hist08:40:012
2255399991613,2cyclictest2572099-21cron12:15:001
2255399991613,2cyclictest2416291-21kworker/u8:1+flush-259:010:05:171
2255399991613,2cyclictest2348432-21kworker/u8:0+flush-259:008:40:201
2255399991613,2cyclictest0-21swapper/112:40:001
2255399991612,3cyclictest2540434-21kworker/u8:2+flush-259:011:51:591
2255399991612,3cyclictest2364087-21kworker/u8:3+events_unbound09:15:181
2255399991612,3cyclictest2264625-21kworker/u8:2+flush-259:008:30:211
2255399991612,3cyclictest2264625-21kworker/u8:2+events_unbound08:45:211
2255399991612,2cyclictest2468251-21cut10:35:011
2255399991612,2cyclictest2196579-21kworker/u8:0+flush-259:007:25:161
2255397991614,1cyclictest60350irq/132-enp0s29f1:rx-007:35:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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