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2026-06-05 - 22:22

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 Fri Jun 05, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
279324621360,3sleep00-21swapper/012:25:170
274197321250,3sleep20-21swapper/210:00:052
27337282980,4sleep20-21swapper/209:35:192
139099700,60rtkit-daemon0-21swapper/207:09:522
268084426645,14sleep30-21swapper/307:06:063
268088826446,13sleep00-21swapper/007:06:400
268108326242,14sleep10-21swapper/107:09:101
27440162530,4sleep23056-21PK-Backend10:05:132
26994072400,2sleep00-21swapper/008:00:010
26836302380,3sleep20-21swapper/207:15:042
268130599361,6cyclictest2762816-21apt11:00:111
27108202350,4sleep30-21swapper/308:30:193
268130599351,4cyclictest2748286-21/usr/sbin/munin10:15:201
268130599311,27cyclictest2759495-21cut10:50:121
268130599310,21cyclictest2793868-21taskset12:28:251
2681305993011,17cyclictest2753879-21cron10:35:001
2681305993011,17cyclictest2740797-21awk09:55:191
2681305993010,18cyclictest2711787-21date08:35:001
268131099290,7cyclictest3056-21PK-Backend07:55:002
268130599297,20cyclictest436-20systemd-journal11:20:001
268130599297,20cyclictest436-20systemd-journal11:20:001
268130599278,17cyclictest2705394-21cat08:15:161
268130599278,16cyclictest2692328-21latency_hist07:40:001
268130599277,17cyclictest2692644-21cpuspeed_turbos07:40:121
268130599272,20cyclictest2741497-21apt-get10:00:061
2681305992716,9cyclictest2725114-21timerandwakeup09:10:191
268130599271,5cyclictest0-21swapper/109:25:111
268130599271,5cyclictest0-21swapper/109:25:111
2681305992710,15cyclictest2781861-21/usr/sbin/munin11:55:201
268130499279,9cyclictest13-21ksoftirqd/007:55:010
268130599268,16cyclictest2776654-21date11:40:011
268130599268,16cyclictest2744350-21cat10:05:181
268130599262,4cyclictest0-21swapper/110:10:091
268130599261,7cyclictest2767468-21taskset11:11:321
2681305992615,10cyclictest26-21ksoftirqd/109:30:161
2681305992610,14cyclictest2786358-21ntp_states12:05:181
268130599260,21cyclictest3056-21PK-Backend07:49:481
268130499263,6cyclictest13-21ksoftirqd/009:40:000
268131099251,22cyclictest2156-21gnome-shell12:22:592
268130599259,13cyclictest2727617-21cron09:19:591
268130599258,15cyclictest2709162-21gunzip08:25:211
268130599257,5cyclictest2772505-21ls11:25:211
268130599256,5cyclictest2796244-21cat12:35:121
268130599256,5cyclictest2778604-21expr11:45:121
268130599256,5cyclictest2717368-21cut08:50:121
268130599256,5cyclictest2715716-21cat08:45:131
268130599255,6cyclictest2764722-21expr11:05:131
268130599254,4cyclictest2714994-21seq08:42:061
268130599252,6cyclictest2719451-21irqstats08:55:161
268130599252,4cyclictest0-21swapper/108:00:101
268130599252,18cyclictest2695924-21apt07:50:131
268130599252,18cyclictest2156-21gnome-shell09:00:091
268130599251,7cyclictest2781652-21unin-run11:55:001
268130599251,19cyclictest2711511-21apt-get08:35:031
268130499251,8cyclictest13-21ksoftirqd/008:30:220
139099250,3rtkit-daemon1389-21rtkit-daemon09:17:402
26904332240,4sleep20-21swapper/207:35:002
26904332240,4sleep20-21swapper/207:35:002
2681312992415,7cyclictest436-20systemd-journal11:35:003
268131099242,5cyclictest34-21ksoftirqd/210:23:492
268131099240,9cyclictest2752596-21grep10:30:122
268130599248,14cyclictest2762028-21timerandwakeup10:55:221
268130599247,15cyclictest2687830-21needreboot07:25:181
268130599243,19cyclictest2733279-21cpuspeed_turbos09:35:131
268130599242,7cyclictest2156-21gnome-shell08:14:091
268130599241,9cyclictest2758477-21python310:45:191
268130599241,7cyclictest2723476-21cat09:05:211
268130599241,6cyclictest2791396-21seq12:20:161
268130599241,4cyclictest2756280-21hddtemp_smartct10:40:151
268130599241,4cyclictest2703038-21latency_hist08:10:011
268130599241,20cyclictest82332-21update-manager07:34:561
268130599241,20cyclictest82332-21update-manager07:34:551
268130599241,10cyclictest2775821-21runrttasks11:35:221
268130599241,10cyclictest2685179-21dump-pmu-power07:20:001
2681305992410,12cyclictest0-21swapper/111:20:201
268130599240,7cyclictest2784738-21taskset12:00:441
268130599240,7cyclictest2784738-21taskset12:00:431
268130599240,5cyclictest436-20systemd-journal12:35:001
268130499246,4cyclictest13-21ksoftirqd/009:10:000
268130499245,12cyclictest2772635-21seq11:26:070
268130499242,7cyclictest13-21ksoftirqd/012:10:180
2681304992410,4cyclictest13-21ksoftirqd/012:05:000
2681304992410,4cyclictest13-21ksoftirqd/012:05:000
268131099234,3cyclictest2731096-21munin-run09:30:002
268131099234,3cyclictest2731096-21munin-run09:30:002
268131099232,5cyclictest3056-21PK-Backend11:25:002
2681310992317,4cyclictest2715244-21munin-plugin-st08:45:012
268130599238,13cyclictest26-21ksoftirqd/111:30:151
268130599237,4cyclictest2750668-21basename10:25:101
268130599231,9cyclictest2790563-21awk12:20:001
268130599231,7cyclictest2787564-21ls12:10:111
268130599231,7cyclictest2727901-21apt09:20:111
268130599231,5cyclictest2708033-21cron08:25:001
268130599231,5cyclictest2685595-21cpuspeed_turbos07:20:111
268130599230,7cyclictest2755614-21perf10:40:011
268130499233,7cyclictest13-21ksoftirqd/011:05:170
2681304992316,5cyclictest13-21ksoftirqd/009:15:010
2681312992220,1cyclictest3056-21PK-Backend08:37:213
2681312992220,1cyclictest0-21swapper/307:52:323
2681312992219,2cyclictest3056-21PK-Backend08:47:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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