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2026-05-17 - 05:31

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 Sun May 17, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6496121050,3sleep00-21swapper/019:40:190
904612900,1sleep00-21swapper/020:55:020
1661462810,12sleep126-21ksoftirqd/100:30:121
5292228043,14sleep30-21swapper/319:09:073
5293027940,13sleep10-21swapper/119:09:131
5265127239,9sleep00-21swapper/019:05:380
5282526242,14sleep20-21swapper/219:07:542
1419632530,4sleep13056-21PK-Backend23:20:151
663152400,4sleep00-21swapper/019:45:120
139099400,4rtkit-daemon1389-21rtkit-daemon20:24:200
139099400,4rtkit-daemon1389-21rtkit-daemon20:24:190
1509392350,2sleep20-21swapper/223:45:182
908722320,4sleep1261ksoftirqd/120:55:151
1242552320,1sleep3124256-21expr22:30:123
5312299270,25cyclictest1389-21rtkit-daemon20:16:370
780852250,8sleep234-21ksoftirqd/220:20:112
780852250,8sleep234-21ksoftirqd/220:20:112
53129992417,5cyclictest42-21ksoftirqd/323:24:043
5312999241,3cyclictest105629-21ntp_states21:35:193
53126992419,4cyclictest34-21ksoftirqd/200:39:072
139099240,16rtkit-daemon0-21swapper/220:39:022
53126992316,5cyclictest160666-21cron00:15:002
5312499230,21cyclictest93703-21apt-get21:05:041
5312299237,3cyclictest1412652date23:20:000
53122992316,5cyclictest93703-21apt-get21:05:000
5312999221,9cyclictest154420-21/usr/sbin/munin23:55:193
53126992220,1cyclictest0-21swapper/200:18:152
5312699220,21cyclictest0-21swapper/200:23:022
53124992220,1cyclictest3056-21PK-Backend19:13:371
53124992220,1cyclictest0-21swapper/122:15:411
53124992220,1cyclictest0-21swapper/122:15:411
53124992220,1cyclictest0-21swapper/121:01:391
53124992220,1cyclictest0-21swapper/120:49:151
53124992220,1cyclictest0-21swapper/100:25:401
53124992219,2cyclictest3056-21PK-Backend23:33:281
53124992219,2cyclictest3056-21PK-Backend00:13:501
53124992214,6cyclictest883-21dbus-daemon20:10:011
53124992213,7cyclictest163073-21cat00:20:131
5312499220,20cyclictest3056-21PK-Backend21:55:471
5312299220,20cyclictest3056-21PK-Backend21:30:230
5312299220,20cyclictest3056-21PK-Backend21:25:230
960102210,3chrt0-21swapper/321:10:123
960102210,3chrt0-21swapper/321:10:123
561262210,3sleep00-21swapper/019:15:170
53129992113,6cyclictest66080-21expr19:45:123
53129992113,6cyclictest139479-21sed23:15:003
5312999210,1cyclictest978-21snmpd21:20:193
5312999210,1cyclictest3056-21PK-Backend19:39:003
5312999210,19cyclictest3056-21PK-Backend19:27:383
5312999210,19cyclictest0-21swapper/319:40:013
53126992119,1cyclictest0-21swapper/223:23:132
53126992119,1cyclictest0-21swapper/223:18:532
53126992119,1cyclictest0-21swapper/223:04:412
53126992119,1cyclictest0-21swapper/222:13:582
53126992119,1cyclictest0-21swapper/221:37:002
53126992119,1cyclictest0-21swapper/220:06:022
53126992119,1cyclictest0-21swapper/220:02:382
53126992119,1cyclictest0-21swapper/219:56:492
53126992119,1cyclictest0-21swapper/219:51:562
53126992119,1cyclictest0-21swapper/219:19:452
53126992113,6cyclictest883-21dbus-daemon22:39:032
5312699210,20cyclictest59025-21apt19:25:122
5312699210,20cyclictest0-21swapper/223:50:372
5312699210,20cyclictest0-21swapper/222:32:432
5312699210,20cyclictest0-21swapper/222:18:512
5312699210,20cyclictest0-21swapper/222:18:512
5312699210,20cyclictest0-21swapper/222:06:142
5312699210,20cyclictest0-21swapper/221:53:362
5312699210,20cyclictest0-21swapper/221:46:062
5312699210,20cyclictest0-21swapper/219:30:532
5312699210,20cyclictest0-21swapper/200:07:132
5312699210,20cyclictest0-21swapper/200:04:432
53124992119,1cyclictest3056-21PK-Backend23:29:561
53124992119,1cyclictest3056-21PK-Backend22:26:151
53124992119,1cyclictest3056-21PK-Backend00:08:021
53124992119,1cyclictest0-21swapper/122:51:171
53124992119,1cyclictest0-21swapper/122:32:581
53124992119,1cyclictest0-21swapper/120:33:071
53124992119,1cyclictest0-21swapper/119:39:401
53124992119,1cyclictest0-21swapper/119:26:281
53124992118,2cyclictest3056-21PK-Backend23:09:351
53124992118,2cyclictest3056-21PK-Backend22:35:011
53124992115,4cyclictest57951-21needreboot19:20:181
53124992115,4cyclictest57951-21needreboot19:20:171
5312499210,20cyclictest3056-21PK-Backend20:14:011
5312499210,20cyclictest0-21swapper/120:26:171
5312499210,19cyclictest3056-21PK-Backend22:02:161
5312499210,19cyclictest3056-21PK-Backend19:45:351
5312499210,19cyclictest3056-21PK-Backend19:44:331
5312499210,19cyclictest3056-21PK-Backend00:15:051
53122992119,1cyclictest0-21swapper/021:51:460
53122992119,1cyclictest0-21swapper/019:10:310
53122992115,4cyclictest167606-21cron00:35:000
53122992114,5cyclictest57991-21ntp_kernel_err19:20:180
53122992114,5cyclictest57991-21ntp_kernel_err19:20:180
53122992110,10cyclictest155420-21cat00:00:010
5312299210,20cyclictest0-21swapper/021:56:260
5312299210,20cyclictest0-21swapper/000:37:470
53129992018,1cyclictest0-21swapper/323:52:483
53129992018,1cyclictest0-21swapper/321:26:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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