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2025-11-03 - 11:58

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 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 Nov 03, 2025 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
380069322520,9sleep11753-21gnome-shell19:05:261
380725221130,8sleep22197014-21PK-Backend19:25:012
38079072880,5sleep00-21swapper/019:25:240
162399850,69rtkit-daemon0-21swapper/319:05:143
380123528465,13sleep20-21swapper/219:09:222
38092212830,8sleep32197014-21PK-Backend19:30:143
39080542760,5sleep21753-21gnome-shell00:10:262
162399740,10rtkit-daemon1622-21rtkit-daemon21:40:091
162399740,10rtkit-daemon1622-21rtkit-daemon21:40:091
380142699692,45cyclictest1753-21gnome-shell22:48:190
380105726945,16sleep00-21swapper/019:07:010
380142699672,36cyclictest3841205-40apt-check21:00:270
39048772660,13sleep126-21ksoftirqd/100:00:281
39048772660,13sleep126-21ksoftirqd/100:00:271
38398902660,8chrt2197014-21PK-Backend20:55:240
380142699662,46cyclictest3868019-40lsb_release22:15:210
380142699662,34cyclictest3811426-21df19:35:140
380142699661,38cyclictest3845343-21sed21:10:220
380142699653,43cyclictest3883730-21irqstats23:00:210
380142699652,37cyclictest1753-21gnome-shell23:54:180
380142699652,36cyclictest3822977-31apt-check20:06:300
38750042640,8chrt0-21swapper/322:35:213
380142699642,45cyclictest1753-21gnome-shell20:34:410
380142699642,39cyclictest1753-21gnome-shell22:08:490
380142699642,39cyclictest1753-21gnome-shell22:08:490
380142699642,39cyclictest1753-21gnome-shell21:39:430
380142699633,39cyclictest38200172cat20:00:140
380142699632,45cyclictest3907525-21/usr/sbin/munin00:10:280
380142699632,44cyclictest1753-21gnome-shell22:22:480
380142699632,36cyclictest1753-21gnome-shell00:36:270
380142699632,35cyclictest1753-21gnome-shell21:23:470
380142699632,35cyclictest1753-21gnome-shell21:23:470
380142699632,32cyclictest3912819-21munin-run00:25:010
380142699631,45cyclictest3876633-21expr22:40:160
380142699631,38cyclictest3880447-21grep22:50:240
380142699631,38cyclictest3871270-21cpuspeed_turbos22:25:180
162399630,7rtkit-daemon1622-21rtkit-daemon20:19:201
380142699624,52cyclictest1753-21gnome-shell20:35:150
380142699621,35cyclictest3855978-21/usr/sbin/munin21:40:270
380142699621,35cyclictest3855978-21/usr/sbin/munin21:40:270
380142699621,34cyclictest3913929-21python300:25:300
380142699621,34cyclictest3896034-21uname23:35:230
380142699621,31cyclictest3874825-21expr22:35:140
380142699612,35cyclictest1753-21gnome-shell22:11:330
380142699612,35cyclictest1753-21gnome-shell21:19:380
380142699612,33cyclictest0-21swapper/020:27:410
380142699611,34cyclictest3825629-21cstates20:15:150
162399610,9rtkit-daemon1622-21rtkit-daemon22:51:391
162399610,9rtkit-daemon1622-21rtkit-daemon21:05:221
380142699602,36cyclictest1753-21gnome-shell23:45:090
380142699601,35cyclictest3888817-21df_inode23:15:190
380142699601,35cyclictest3882639-21taskset22:55:510
162399600,9rtkit-daemon1622-21rtkit-daemon20:45:591
3801438995916,6cyclictest141rcu_preempt21:35:043
380142699592,34cyclictest1753-21gnome-shell21:53:000
380142699592,34cyclictest1753-21gnome-shell20:52:470
380142699592,34cyclictest1753-21gnome-shell20:42:400
380142699592,34cyclictest1753-21gnome-shell00:32:560
380142699592,33cyclictest1753-21gnome-shell19:42:510
380142699592,32cyclictest1753-21gnome-shell19:10:320
380142699592,30cyclictest3809457-21hddtemp_smartct19:30:190
380142699592,29cyclictest3857683-21ntp_states21:45:280
3801426995922,32cyclictest3891673-21pool-org.gnome.23:25:010
3801426995919,34cyclictest438-20systemd-journal23:07:390
380142699591,33cyclictest3835465-21perf20:49:540
380142699591,32cyclictest3905995-21expr00:05:140
162399590,9rtkit-daemon1622-21rtkit-daemon21:23:121
162399590,9rtkit-daemon1622-21rtkit-daemon21:23:121
380142699582,33cyclictest3818437-21hddtemp_smartct19:55:230
380142699582,33cyclictest1753-21gnome-shell23:42:280
380142699582,33cyclictest1753-21gnome-shell22:34:140
3801426995823,31cyclictest3242253-21nautilus00:00:020
380142699582,29cyclictest3860760-21df21:55:150
380142699572,33cyclictest1753-21gnome-shell19:46:410
380142699572,32cyclictest1753-21gnome-shell19:18:080
380142699572,30cyclictest3827421-21hddtemp_smartct20:20:220
380142699571,31cyclictest0-21swapper/000:15:220
380143099560,52cyclictest1622-21rtkit-daemon21:45:211
162399560,8rtkit-daemon1622-21rtkit-daemon21:31:011
39097962550,9chrt1753-21gnome-shell00:15:222
38978462550,9sleep234-21ksoftirqd/223:40:242
380142699552,29cyclictest0-21swapper/021:30:200
380142699551,31cyclictest0-21swapper/020:10:270
162399550,8rtkit-daemon1622-21rtkit-daemon20:55:561
3801426995421,29cyclictest3851146-21sshd21:27:130
3801426995416,33cyclictest3905555-21/usr/sbin/munin00:05:010
3801426995416,33cyclictest3905555-21/usr/sbin/munin00:05:010
162399540,8rtkit-daemon1622-21rtkit-daemon21:28:111
162399530,5rtkit-daemon26-21ksoftirqd/123:40:381
162399530,10rtkit-daemon1753-21gnome-shell22:47:532
3801426995220,28cyclictest1069-21runrttasks21:08:260
380143899503,23cyclictest141rcu_preempt00:20:023
3801434995037,9cyclictest34-21ksoftirqd/220:00:022
3801430995030,16cyclictest3862873-21ntp_states22:00:271
380142699502,43cyclictest1753-21gnome-shell19:20:280
380142699502,26cyclictest3887301-21memory23:10:250
3801426995010,35cyclictest3894308-21tr23:30:240
3801438994912,20cyclictest141rcu_preempt21:00:163
3801434994925,8cyclictest1753-21gnome-shell23:35:172
3801426994910,34cyclictest1753-21gnome-shell23:25:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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