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2026-09-16 - 22:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Wed Sep 16, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4002935997535,35cyclictest0-21swapper/109:00:011
4002935997033,31cyclictest0-21swapper/110:25:281
4002935996731,31cyclictest0-21swapper/110:35:291
4002935996728,31cyclictest0-21swapper/110:05:271
4002933996617,45cyclictest4054294-21latency_hist12:10:010
4002933996617,45cyclictest4019970-21find08:45:280
4002933996531,29cyclictest4043779-21cut11:05:270
4002933996420,3cyclictest4016385-21/usr/sbin/munin08:25:230
4002935996326,33cyclictest4039682-21grep10:40:291
4002935996321,35cyclictest0-21swapper/111:40:281
4002935996216,39cyclictest0-21swapper/108:50:291
400293599621,53cyclictest4018018-21ssh08:35:231
4002935996140,17cyclictest4027672-21grep09:30:301
4002935996138,18cyclictest4055228-21munin-plugin-st12:15:001
4002935996127,28cyclictest0-21swapper/111:00:291
400293599612,50cyclictest4018983-21meminfo08:40:271
400293599612,50cyclictest4018983-21meminfo08:40:271
400293599611,51cyclictest4007604-21apt-get07:35:131
400293599611,51cyclictest4003097-21apt-get07:10:131
400293599603,48cyclictest4010980-21apt-get07:55:151
400293599603,48cyclictest4010980-21apt-get07:55:141
400293599602,50cyclictest4028814-21apt-get09:40:171
400293599601,51cyclictest4022063-21apt-get09:00:151
400293599601,50cyclictest4011839-21apt-get08:00:151
4002933996015,42cyclictest0-21swapper/008:20:290
4002935995936,19cyclictest4036304-21unixbench_multi10:20:281
4002935995929,25cyclictest4054226-21grep12:05:291
400293599591,51cyclictest4025738-21memory09:20:251
400293599591,51cyclictest4004303-21/usr/sbin/munin07:15:171
400293599591,50cyclictest4019526-21apt-get08:45:151
400293599581,51cyclictest4027955-21/usr/sbin/munin09:35:121
400293599581,51cyclictest4027955-21/usr/sbin/munin09:35:121
400293599581,50cyclictest4030564-21/usr/sbin/munin09:50:161
400293599581,50cyclictest4030564-21/usr/sbin/munin09:50:161
400293599581,50cyclictest4015306-21munin-node08:20:121
400293599581,49cyclictest4045977-21apt-get11:20:151
400293599581,48cyclictest4006761-21apt-get07:30:151
4002933995830,25cyclictest4031332-21/usr/sbin/munin09:55:120
400293599572,47cyclictest4040388-21/usr/sbin/munin10:45:271
4002935995723,30cyclictest0-21swapper/110:15:291
400293599571,49cyclictest4059141-21/usr/sbin/munin12:35:261
400293599571,49cyclictest4026632-21/usr/sbin/munin09:25:261
400293599571,48cyclictest4046907-21apt-get11:25:141
4002933995747,6cyclictest0-21swapper/011:10:280
400293599562,46cyclictest4040810-21apt-get10:50:131
400293599562,46cyclictest4016149-21apt-get08:25:151
400293599562,45cyclictest4013607-21apt-get08:10:121
4002935995620,30cyclictest0-21swapper/112:20:291
4002933995623,4cyclictest4011583-21sed07:55:300
4002933995623,4cyclictest4011583-21sed07:55:300
4002933995610,43cyclictest4041754-21fschecks_count10:55:190
400293599555,44cyclictest4009877-21grep07:45:271
400293599552,45cyclictest4048739-21ssh11:35:221
400293599552,45cyclictest4023102-21/usr/sbin/munin09:05:211
4002935995517,34cyclictest0-21swapper/107:50:251
400293599551,47cyclictest4051120-21/usr/sbin/munin11:50:291
400293599551,46cyclictest4045116-21apt-get11:15:121
400293599551,46cyclictest4024579-21apt-get09:15:141
400293599551,46cyclictest4008462-21apt-get07:40:111
400293599551,46cyclictest4008462-21apt-get07:40:111
400293599551,46cyclictest4005296-21/usr/sbin/munin07:20:211
400293599551,45cyclictest4057966-21apt-get12:30:141
4002933995525,3cyclictest4007311-21unixbench_multi07:30:290
400293599543,44cyclictest4047745-21apt-get11:30:141
400293599541,47cyclictest4029952-21/usr/sbin/munin09:45:251
400293599541,46cyclictest4055504-21/usr/sbin/munin12:15:201
400293599541,46cyclictest4052301-21/usr/sbin/munin11:55:251
400293599541,45cyclictest4034028-21diskstats10:10:171
400293599541,44cyclictest4037430-21apt-get10:30:151
400293399549,43cyclictest0-21swapper/010:05:270
4002933995442,8cyclictest4036798-21/usr/sbin/munin10:25:210
4002933995436,13cyclictest4029072-21/usr/sbin/munin09:40:250
4002933995422,4cyclictest4017027-21grep08:30:130
4002933995419,30cyclictest4034040-21/usr/sbin/munin10:10:180
4002933995417,34cyclictest4041491-21latency_hist10:55:010
400293599537,38cyclictest0-21swapper/112:00:271
400293599532,42cyclictest4031629-21/usr/sbin/munin09:55:251
400293599531,45cyclictest4057127-21apt-get12:25:151
400293599531,45cyclictest4043747-21/usr/sbin/munin11:05:261
400293599531,45cyclictest4032250-21/usr/sbin/munin10:00:161
400293599531,45cyclictest4032250-21/usr/sbin/munin10:00:161
400293599531,45cyclictest4005920-21munin-node07:25:121
4002933995343,8cyclictest4046274-21/usr/sbin/munin11:20:250
4002933995322,3cyclictest4029951-21meminfo09:45:250
4002933995312,4cyclictest4025460-21grep09:20:160
400293599521,45cyclictest4024098-21/usr/sbin/munin09:10:261
400293599521,43cyclictest4050283-21apt-get11:45:141
4002933995243,6cyclictest4047164-21/usr/sbin/munin11:25:220
4002933995240,8cyclictest4057963-21munin-node12:30:110
4002933995220,29cyclictest4048758-21tune2fs11:35:230
4002933995220,29cyclictest0-21swapper/007:15:010
4002933995217,8cyclictest4018504-21latency_hist08:40:000
4002935995129,18cyclictest0-21swapper/111:10:281
400293599511,44cyclictest4042258-21/usr/sbin/munin10:55:291
400293599511,43cyclictest4017205-21/usr/sbin/munin08:30:191
400293599511,43cyclictest4012675-21/usr/sbin/munin08:05:121
400293599511,43cyclictest4012675-21/usr/sbin/munin08:05:121
4002933995145,3cyclictest4024879-21/usr/sbin/munin09:15:260
4002933995139,8cyclictest0-21swapper/011:30:180
4002933995138,10cyclictest4011842-21/usr/sbin/munin08:00:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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