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2025-11-21 - 01:03

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 Thu Nov 20, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121319222840,9sleep30-21swapper/307:05:183
121312622560,4sleep20-21swapper/207:05:172
12748662930,5sleep30-21swapper/310:00:013
12698172930,6sleep10-21swapper/109:45:181
162399920,9rtkit-daemon1622-21rtkit-daemon11:51:401
162399920,9rtkit-daemon1622-21rtkit-daemon11:51:391
162399910,8rtkit-daemon1622-21rtkit-daemon11:45:281
162399910,8rtkit-daemon1622-21rtkit-daemon11:20:231
12244182910,5sleep20-21swapper/207:35:192
162399880,9rtkit-daemon1622-21rtkit-daemon11:40:561
162399850,9rtkit-daemon1622-21rtkit-daemon10:36:021
13034452780,6sleep11753-21gnome-shell11:20:011
121390027739,9sleep10-21swapper/107:06:431
162399750,9rtkit-daemon1753-21gnome-shell11:16:000
162399740,64rtkit-daemon0-21swapper/007:06:450
162399650,8rtkit-daemon1622-21rtkit-daemon12:17:271
13126242650,4sleep3411rcuc/311:45:153
121433699641,37cyclictest1312990-21df11:45:192
1214336996323,35cyclictest1272346-21cat09:50:362
121433699622,32cyclictest1753-21gnome-shell07:58:522
1214336996022,34cyclictest855-21dbus-daemon09:50:022
1214336996022,33cyclictest1284151-21mktemp10:25:032
121433499600,55cyclictest1622-21rtkit-daemon11:06:031
121433699592,34cyclictest1753-21gnome-shell07:23:002
121433699592,34cyclictest1753-21gnome-shell07:23:002
1214336995917,37cyclictest438-20systemd-journal11:31:282
121433699591,35cyclictest860997-21snmpd07:49:342
162399580,44rtkit-daemon1753-21gnome-shell07:48:060
1214340995824,30cyclictest1276886-21cstates10:05:143
1214340995816,12cyclictest438-20systemd-journal07:40:003
162399570,9rtkit-daemon1622-21rtkit-daemon07:21:401
162399570,9rtkit-daemon1622-21rtkit-daemon07:21:391
12225972570,7sleep013-21ksoftirqd/007:30:150
1214340995721,13cyclictest855-21dbus-daemon12:25:003
1214340995716,13cyclictest1322753-21apt-get12:15:003
1214334995720,32cyclictest1230982-21sh07:55:001
162399560,9rtkit-daemon1622-21rtkit-daemon10:48:051
12867272560,13sleep1251rcuc/110:30:261
12760192560,3chrt1276020-21/usr/sbin/munin10:00:303
12613932560,17sleep342-21ksoftirqd/309:20:213
1214340995618,12cyclictest1268115-21which09:40:223
1214340995614,20cyclictest42-21ksoftirqd/310:30:033
121433699562,31cyclictest1753-21gnome-shell11:58:332
1214336995616,35cyclictest1293140-21cat10:50:142
121433699561,34cyclictest1280291-21dpkg10:15:082
121433699561,32cyclictest1287678-21/usr/sbin/munin10:35:312
1214334995626,25cyclictest1253944-21tr09:00:141
162399550,8rtkit-daemon1622-21rtkit-daemon10:52:151
162399550,8rtkit-daemon1622-21rtkit-daemon07:17:171
162399550,7rtkit-daemon1622-21rtkit-daemon12:39:581
12786012550,11chrt1278606-21cpuspeed_turbos10:10:173
1214340995521,12cyclictest1296131-21apt-get11:00:023
1214340995517,6cyclictest391irq_work/308:48:243
1214336995523,28cyclictest1069-21runrttasks12:09:482
121433699552,30cyclictest1753-21gnome-shell07:44:522
1214336995519,32cyclictest1278172-21pool-org.gnome.10:10:012
1214336995518,32cyclictest1254504-21ntp_kernel_err09:00:232
121434099544,23cyclictest1292061-21uname10:45:273
1214340995416,13cyclictest1236633-21cut08:10:133
1214340995415,14cyclictest1632-21dbus-daemon10:15:073
1214340995413,20cyclictest42-21ksoftirqd/309:28:583
121433699542,27cyclictest1253161-21users08:55:412
1214336995415,34cyclictest3242253-21nautilus07:25:042
121433699541,32cyclictest1215310-21processes07:10:282
1214334995417,10cyclictest1247098-21cat08:40:121
121433499541,34cyclictest1279931-21taskset10:15:011
162399530,9rtkit-daemon1622-21rtkit-daemon11:37:270
1214340995314,11cyclictest1227614-21sed07:45:033
1214336995316,32cyclictest1291692-21uname10:45:202
1214336995315,34cyclictest1265134-21wc09:30:292
121433699531,48cyclictest860997-21snmpd11:37:022
121433699531,46cyclictest1300435-21expr11:10:122
121433499532,46cyclictest1753-21gnome-shell07:30:191
1214334995316,13cyclictest875-21polkitd09:13:171
1214334995314,14cyclictest1632-21dbus-daemon09:45:001
12912082520,7chrt2197014-21PK-Backend10:45:100
1214340995222,9cyclictest1753-21gnome-shell11:37:553
1214340995220,7cyclictest12675892chrt09:40:023
1214340995219,6cyclictest1283658-21sh10:25:003
1214340995215,11cyclictest1219024-21cat07:20:213
1214340995215,11cyclictest1219024-21cat07:20:203
1214340995214,12cyclictest1328540-21grep12:30:143
1214340995213,13cyclictest1247771-21cat08:40:273
1214340995213,11cyclictest1216892-21grep07:15:163
1214336995220,28cyclictest34-21ksoftirqd/208:36:182
1214336995218,29cyclictest1299155-21ntp_kernel_err11:05:232
1214336995217,30cyclictest1329113-21memory12:30:222
1214336995216,32cyclictest1275695-21sh10:00:252
1214336995215,32cyclictest438-20systemd-journal08:05:002
1214336995214,33cyclictest1247192-21expr08:40:122
1214336995213,34cyclictest1234831-21cat08:05:132
121433499522,11cyclictest1296967-21ls11:00:161
12357462510,6chrt0-21swapper/108:05:291
1214340995122,8cyclictest1753-21gnome-shell10:41:003
1214340995119,9cyclictest1232712-21cron08:00:013
1214340995118,10cyclictest42-21ksoftirqd/308:15:253
1214340995118,10cyclictest42-21ksoftirqd/308:15:243
1214336995121,26cyclictest1753-21gnome-shell09:12:522
1214336995117,29cyclictest1242027-21sh08:25:132
1214336995116,31cyclictest1290326-21switchtime10:40:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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