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2026-06-28 - 18:05

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 50 highest latencies:
System rackcslot7s.osadl.org (updated Sun Jun 28, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
325706821250,2sleep00-21swapper/012:35:120
32159032960,3sleep10-21swapper/110:35:191
139099850,68rtkit-daemon0-21swapper/307:06:003
31412202810,8sleep20-21swapper/207:05:232
31407512800,9sleep126-21ksoftirqd/107:05:151
314073927252,14sleep00-21swapper/007:05:150
31924142560,3sleep20-21swapper/209:30:012
31797882560,7sleep33179787-21sed08:55:013
32522332520,2sleep00-21swapper/012:20:120
31682262500,3sleep13168228-21grep08:20:181
32096342350,14sleep126-21ksoftirqd/110:19:591
32096342350,14sleep126-21ksoftirqd/110:19:591
314197999278,5cyclictest3252144-21expr12:20:101
3141979992711,14cyclictest3211600-21/usr/sbin/munin10:25:241
314197999267,5cyclictest3224419-21grep11:00:171
3141979992613,12cyclictest3234966-21if_err_enp2s011:30:181
3141979992611,13cyclictest3164872-21cut08:10:201
3141979992611,13cyclictest3142278-21cpuspeed_turbos07:10:141
314197999260,1cyclictest0-21swapper/111:24:251
31673302250,3chrt3056-21PK-Backend08:20:013
314197999257,4cyclictest3154582-21wc07:40:211
314197999253,8cyclictest3203163-21cstates10:00:131
314197999252,18cyclictest1788620-21WebKitWebProces12:10:121
3141979992519,4cyclictest3218363-21dump-pmu-power10:45:001
314197999251,11cyclictest3175567-21python308:40:211
139099250,4rtkit-daemon1389-21rtkit-daemon10:00:362
139099250,4rtkit-daemon1389-21rtkit-daemon08:03:212
314198799240,22cyclictest1389-21rtkit-daemon12:08:313
314197999249,4cyclictest3147127-21timerwakeupswit07:20:211
314197999248,6cyclictest3173725-21ntpq08:35:251
314197999247,4cyclictest3167158-21seq08:19:201
314197999241,9cyclictest3221229-21python310:50:201
314197999241,7cyclictest3214922-21unin-run10:35:011
314197999241,5cyclictest3056-21PK-Backend09:55:121
3141979992411,11cyclictest3218610-21/usr/sbin/munin10:45:181
3141977992415,7cyclictest82332-21update-manager10:35:420
3141987992312,9cyclictest3209654-21unin-run10:20:003
3141987992312,9cyclictest3209654-21unin-run10:20:003
3141983992319,3cyclictest3147601-21idleruntime-cro07:25:002
314198399231,2cyclictest978-21snmpd09:54:322
314197999237,3cyclictest3253560-21/usr/sbin/munin12:25:131
314197999235,5cyclictest3180544-21/usr/sbin/munin08:55:161
314197999232,8cyclictest2156-21gnome-shell11:25:421
3141979992319,3cyclictest3056-21PK-Backend08:00:251
314197999231,6cyclictest3157961-21taskset07:50:191
314197799234,4cyclictest13-21ksoftirqd/007:30:210
3141977992315,6cyclictest3220728-21df10:50:110
3141987992218,3cyclictest42-21ksoftirqd/310:25:403
3141987992218,3cyclictest3152828-21taskset07:36:393
314198799221,17cyclictest3229892-21python311:15:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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