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2026-07-06 - 03:34

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 Mon Jul 06, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
319380622780,4sleep20-21swapper/219:05:142
328745421220,2sleep33056-21PK-Backend23:30:003
330928621080,3sleep00-21swapper/000:30:160
329229821000,2sleep20-21swapper/223:40:222
139099810,68rtkit-daemon0-21swapper/319:09:433
319477927153,13sleep00-21swapper/019:06:530
319357926643,15sleep10-21swapper/119:05:131
32242422500,3sleep30-21swapper/320:30:133
33102772470,4sleep33056-21PK-Backend00:35:003
32437082420,4sleep13056-21PK-Backend21:25:161
139099360,3rtkit-daemon3056-21PK-Backend22:00:123
139099360,3rtkit-daemon3056-21PK-Backend22:00:113
139099350,3rtkit-daemon3056-21PK-Backend22:30:063
319515999318,12cyclictest3300497-21irqstats00:05:180
319515999296,14cyclictest0-21swapper/020:05:360
32193672280,4sleep33056-21PK-Backend20:15:173
3195169992822,4cyclictest42-21ksoftirqd/300:10:013
319515999286,11cyclictest3233416-21python320:55:200
319515999283,11cyclictest3274376-21/usr/sbin/munin22:50:170
319515999275,9cyclictest3247439-21ntp_states21:35:190
319515999275,9cyclictest32346612sh21:00:140
319515999275,9cyclictest32346612sh21:00:140
319515999274,13cyclictest3197817-21/usr/sbin/munin19:15:200
3195165992620,4cyclictest2156-21gnome-shell22:09:082
319515999262,14cyclictest0-21swapper/022:40:120
3195159992611,13cyclictest3262314-21unin-run22:20:010
319515999255,12cyclictest3267547-21chrt22:32:400
319515999254,8cyclictest3305502-21expr00:20:130
319515999254,8cyclictest3238343-21memory21:10:160
319515999253,7cyclictest3248428-21apt21:40:110
139099250,4rtkit-daemon1389-21rtkit-daemon00:35:150
32975562240,3sleep13056-21PK-Backend23:55:221
319516999249,14cyclictest3056-21PK-Backend23:34:053
3195169992411,4cyclictest42-21ksoftirqd/320:55:223
3195165992417,5cyclictest3209697-21cron19:50:012
319516599241,21cyclictest3290194-21python323:35:202
319515999248,14cyclictest3259631-21cat22:10:180
319515999247,15cyclictest1095-21runrttasks20:15:090
319515999244,7cyclictest3298864-21memory00:00:160
319515999244,6cyclictest3236032-21apt21:05:120
319515999242,13cyclictest0-21swapper/020:10:190
319515999241,21cyclictest3265407-21python322:25:210
139099240,16rtkit-daemon3056-21PK-Backend21:52:523
3195169992319,2cyclictest3056-21PK-Backend22:47:113
3195165992321,1cyclictest0-21swapper/219:20:312
319516399230,21cyclictest3285268-21taskset23:21:001
3195159992321,1cyclictest0-21swapper/020:32:270
3195159992316,5cyclictest3290798-21cron23:40:010
319515999231,14cyclictest0-21swapper/022:40:010
139099230,20rtkit-daemon3194-21gmain00:29:210
139099230,15rtkit-daemon0-21swapper/322:40:223
32726832220,4sleep20-21swapper/222:45:212
319516999229,4cyclictest42-21ksoftirqd/319:45:373
3195169992220,1cyclictest0-21swapper/300:22:223
319516999221,9cyclictest3245439-21irqstats21:30:173
3195169992219,2cyclictest3056-21PK-Backend23:45:453
3195169992219,2cyclictest3056-21PK-Backend19:25:073
3195169992219,2cyclictest3056-21PK-Backend00:36:353
319516999220,20cyclictest3056-21PK-Backend23:38:153
319516999220,20cyclictest3056-21PK-Backend20:14:483
319516999220,20cyclictest3056-21PK-Backend20:09:553
3195165992220,1cyclictest0-21swapper/222:40:382
3195165992220,1cyclictest0-21swapper/220:15:332
3195165992214,6cyclictest3286443-21memory23:25:182
3195165992214,6cyclictest3269086-21users22:35:202
3195163992220,1cyclictest0-21swapper/122:41:451
3195163992220,1cyclictest0-21swapper/121:44:411
3195163992219,2cyclictest3056-21PK-Backend21:17:371
3195163992214,7cyclictest3272726-21sed22:45:201
319516399220,20cyclictest3056-21PK-Backend20:50:201
319515999227,13cyclictest3271673-21gmain22:45:020
319515999222,8cyclictest0-21swapper/020:30:000
3195159992220,1cyclictest0-21swapper/021:33:380
139099220,4rtkit-daemon1389-21rtkit-daemon00:15:540
139099220,15rtkit-daemon0-21swapper/220:32:162
139099220,14rtkit-daemon3056-21PK-Backend22:08:513
32934602210,9sleep126-21ksoftirqd/123:45:141
3195169992119,1cyclictest0-21swapper/321:37:563
3195169992119,1cyclictest0-21swapper/300:10:533
3195169992118,2cyclictest3056-21PK-Backend19:53:043
319516999210,20cyclictest3056-21PK-Backend22:29:053
319516999210,20cyclictest0-21swapper/320:45:373
319516999210,19cyclictest3056-21PK-Backend23:53:143
319516999210,19cyclictest3056-21PK-Backend23:09:353
319516999210,19cyclictest3056-21PK-Backend22:39:003
319516999210,19cyclictest3056-21PK-Backend20:21:163
3195165992119,1cyclictest0-21swapper/223:46:022
3195165992119,1cyclictest0-21swapper/223:17:032
3195165992119,1cyclictest0-21swapper/222:23:082
3195165992119,1cyclictest0-21swapper/222:18:292
3195165992119,1cyclictest0-21swapper/221:52:532
3195165992119,1cyclictest0-21swapper/221:47:062
3195165992119,1cyclictest0-21swapper/221:43:142
3195165992119,1cyclictest0-21swapper/221:12:522
3195165992119,1cyclictest0-21swapper/220:46:362
3195165992119,1cyclictest0-21swapper/220:27:222
3195165992119,1cyclictest0-21swapper/219:14:432
3195165992119,1cyclictest0-21swapper/200:19:082
3195165992113,6cyclictest3217825-21python320:10:222
3195165992112,7cyclictest3299736-21cron00:04:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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