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2026-01-05 - 02:39

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 Sun Jan 04, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
986063998511,68cyclictest1035131-21apt-get11:55:021
98606399758,29cyclictest880-21avahi-daemon07:35:011
986059997167,2cyclictest0-21swapper/008:35:180
986063996620,40cyclictest1660-21snmpd10:53:411
986063996610,20cyclictest1042270-21/usr/sbin/munin12:35:201
986063996418,37cyclictest0-21swapper/107:55:301
986063996418,37cyclictest0-21swapper/107:55:301
98606899622,32cyclictest0-21swapper/209:30:012
98606399628,10cyclictest1035131-21apt-get11:55:021
98606399616,20cyclictest982810-21kworker/u8:3+ext4-rsv-conversion07:55:011
986063996117,34cyclictest0-21swapper/107:15:011
986063996025,28cyclictest167450irq/126-8000000.ethernet-tx110:15:181
986063996025,28cyclictest167450irq/126-8000000.ethernet-tx110:15:181
98605999606,27cyclictest15-21rcuc/008:20:010
986059995927,22cyclictest20850irq/208-8000000.ethernet11:10:200
986063995816,34cyclictest0-21swapper/111:45:211
98606399575,42cyclictest0-21swapper/108:45:311
98606399575,42cyclictest0-21swapper/108:45:311
986063995728,23cyclictest0-21swapper/108:15:201
98606399561,15cyclictest1016594-21apt-get10:05:161
98606399561,13cyclictest992423-21apt-get07:45:171
98606399557,39cyclictest0-21swapper/109:20:291
986063995533,17cyclictest0-21swapper/109:55:001
986063995510,36cyclictest0-21swapper/108:40:151
98606899541,25cyclictest0-21swapper/207:25:012
98606399547,37cyclictest0-21swapper/109:20:011
98606399542,9cyclictest1039836-21/usr/sbin/munin12:20:191
986063995422,28cyclictest0-21swapper/110:25:191
98606399542,12cyclictest1020812-21apt-get10:30:181
98606399542,12cyclictest1001033-21/usr/sbin/munin08:35:291
986063995413,31cyclictest0-21swapper/109:25:201
986063995411,34cyclictest0-21swapper/110:35:241
98606399532,7cyclictest989342-21meminfo07:25:241
98606399532,10cyclictest1031203-21/usr/sbin/munin11:30:221
986063995319,26cyclictest0-21swapper/111:25:251
986063995318,27cyclictest0-21swapper/109:40:211
986063995316,28cyclictest0-21swapper/108:55:271
986063995312,33cyclictest0-21swapper/108:00:201
986063995310,33cyclictest0-21swapper/108:05:191
98606399526,37cyclictest0-21swapper/107:20:281
986063995226,21cyclictest0-21swapper/111:40:261
986063995212,31cyclictest0-21swapper/107:15:031
98606399521,12cyclictest1019135-21apt-get10:20:181
98606399521,11cyclictest1013216-21apt-get09:45:171
98606399521,10cyclictest1037469-21cut12:05:271
98606399521,10cyclictest1037469-21cut12:05:271
98606399521,10cyclictest1005593-21/usr/sbin/munin09:00:231
98606399516,36cyclictest0-21swapper/112:10:201
98606399516,36cyclictest0-21swapper/112:10:191
98606399515,37cyclictest0-21swapper/108:30:181
98606399512,10cyclictest1041984-21tail12:30:311
98606399511,8cyclictest998826-21/usr/sbin/munin08:20:261
98606399511,8cyclictest1022904-21/usr/sbin/munin10:40:271
98606399511,44cyclictest1029378-21dropbear11:20:201
98606399511,10cyclictest1026181-21/usr/sbin/munin11:00:261
98606399511,10cyclictest1026181-21/usr/sbin/munin11:00:261
986068995037,6cyclictest0-21swapper/207:15:022
98606399506,33cyclictest0-21swapper/108:50:251
98606399502,8cyclictest1026977-21/usr/sbin/munin11:05:231
98606399502,5cyclictest1006732-21sed09:05:301
98606399501,9cyclictest999776-21/usr/sbin/munin08:25:271
986063995017,28cyclictest0-21swapper/110:00:221
98605999502,4cyclictest131ktimers/009:55:020
986068994931,12cyclictest0-21swapper/210:20:312
986063994941,5cyclictest1007674-21munin-plugin-st09:15:001
98606399492,9cyclictest1023916-21/usr/sbin/munin10:45:291
98606399492,8cyclictest1032101-21/usr/sbin/munin11:35:241
98606399491,8cyclictest1025237-21/usr/sbin/munin10:55:221
98606399491,6cyclictest1010801-21grep09:30:301
98605999491,15cyclictest0-21swapper/008:10:010
98606399489,6cyclictest1036403-21lsblk12:00:211
98606399483,5cyclictest992177-21grep07:40:301
986063994824,19cyclictest0-21swapper/107:35:271
986059994836,7cyclictest1031556-21grep11:30:290
98605999481,5cyclictest0-21swapper/009:00:010
986068994736,5cyclictest1013752-21unixbench_multi09:45:302
98606399473,12cyclictest1039036-21grep12:15:231
98606399472,6cyclictest1012079-21grep09:35:301
986059994735,8cyclictest1017984-21grep10:10:290
986068994634,8cyclictest0-21swapper/211:40:012
986068994633,8cyclictest0-21swapper/211:30:002
98606399462,8cyclictest997083-21/usr/sbin/munin08:10:271
98606399462,11cyclictest1015540-21munin-plugin-st09:59:591
98606399461,9cyclictest1027558-21apt-get11:10:161
98605999466,33cyclictest1035131-21apt-get11:55:010
986059994633,5cyclictest0-21swapper/007:15:010
986059994623,20cyclictest20650irq/252-8000000.ethernet10:05:230
98605999461,2cyclictest0-21swapper/012:15:150
98606899452,22cyclictest30-21rcuc/207:45:002
98606399452,7cyclictest1040658-21df_inode12:25:171
98606399452,7cyclictest1040658-21df_inode12:25:171
98606399452,10cyclictest986067-21wc07:10:011
98606399451,11cyclictest1028911-21/usr/sbin/munin11:15:281
98606399451,11cyclictest1028911-21/usr/sbin/munin11:15:281
986059994536,5cyclictest0-21swapper/011:20:290
986059994531,9cyclictest1008729-21latency_hist09:20:000
98605999451,3cyclictest0-21swapper/009:45:010
986068994431,9cyclictest0-21swapper/207:35:002
98606399441,10cyclictest1017432-21apt-get10:10:121
98605999441,8cyclictest1007104-21df_inode09:10:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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