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2026-06-13 - 22:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot1s.osadl.org (updated Sat Jun 13, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1207321330,2sleep20-21swapper/208:18:062
2125621210,2sleep30-21swapper/308:43:073
2125621210,2sleep30-21swapper/308:43:073
97652930,3chrt0-21swapper/308:13:003
97652930,3chrt0-21swapper/308:13:003
167482810,3sleep30-21swapper/311:23:073
167482810,3sleep30-21swapper/311:23:073
147602710,3sleep10-21swapper/108:23:151
147602710,3sleep10-21swapper/108:23:151
186702640,3chrt0-21swapper/211:28:082
186702640,3chrt0-21swapper/211:28:082
6212630,3sleep10-21swapper/109:13:121
6212630,3sleep10-21swapper/109:13:121
6212630,3sleep10-21swapper/109:13:121
160242620,3chrt0-21swapper/111:22:531
160242620,3chrt0-21swapper/111:22:531
27892580,2chrt2759-21fschecks_time12:13:050
27892580,2chrt2759-21fschecks_time12:13:050
292732550,1chrt29274-21/usr/sbin/munin10:28:181
292732550,1chrt29274-21/usr/sbin/munin10:28:181
292732550,1chrt29274-21/usr/sbin/munin10:28:181
45172490,2sleep20-21swapper/212:18:052
292372470,2sleep20-21swapper/209:03:082
292372470,2sleep20-21swapper/209:03:082
122362470,4sleep012242-21gltestperf12:38:050
122362470,4sleep012242-21gltestperf12:38:050
303042450,2sleep016-21ksoftirqd/009:07:560
303042450,2sleep016-21ksoftirqd/009:07:560
167242450,2sleep30-21swapper/308:28:163
167242450,2sleep30-21swapper/308:28:163
279382430,3sleep00-21swapper/007:33:090
279382430,3sleep00-21swapper/007:33:090
48532420,2chrt4856-21needreboot07:58:100
48532420,2chrt4856-21needreboot07:58:100
169942420,3sleep30-21swapper/309:58:043
117932420,2sleep30-21swapper/311:08:163
117932420,2sleep30-21swapper/311:08:163
120982410,3sleep20-21swapper/211:11:242
120982410,3sleep20-21swapper/211:11:242
300532390,3sleep20-21swapper/207:38:142
300532390,3sleep20-21swapper/207:38:142
219232390,2sleep122037-21fschecks_time11:38:051
107122390,3sleep20-21swapper/212:33:092
107122390,3sleep20-21swapper/212:33:092
107122390,3sleep20-21swapper/212:33:092
131772380,3sleep00-21swapper/011:13:110
131772380,3sleep00-21swapper/011:13:110
171482360,2sleep10-21swapper/108:32:521
171482360,2sleep10-21swapper/108:32:521
19920993529,4cyclictest1-21systemd11:22:520
19920993529,4cyclictest1-21systemd11:22:520
19920993425,7cyclictest1316-21needreboot12:08:100
19920993425,7cyclictest1316-21needreboot12:08:100
138092340,3sleep30-21swapper/309:48:113
138092340,3sleep30-21swapper/309:48:113
138092340,3sleep30-21swapper/309:48:113
60932330,3chrt0-21swapper/210:53:152
60932330,3chrt0-21swapper/210:53:152
14642330,3sleep20-21swapper/207:48:162
14642330,3sleep20-21swapper/207:48:162
32772320,2sleep03279-21sshd09:21:240
32772320,2sleep03279-21sshd09:21:240
230462320,2chrt23049-21unixbench_singl11:38:150
19921993226,4cyclictest12803-21cron09:47:521
19921993226,4cyclictest12803-21cron09:47:521
19921993226,4cyclictest12803-21cron09:47:521
19921993225,5cyclictest21756-21latency_hist11:38:001
19921993220,9cyclictest700-21192.168.115.40-manager08:53:141
19921993220,9cyclictest700-21192.168.115.40-manager08:53:141
19921993220,3cyclictest90-1pr/ttyS007:54:421
19921993220,3cyclictest90-1pr/ttyS007:54:421
19920993224,6cyclictest4628-21fschecks_time12:18:060
30392310,3sleep13043-21cpuspeed10:48:031
30392310,3sleep13043-21cpuspeed10:48:031
30392310,3sleep13043-21cpuspeed10:48:031
19921993127,3cyclictest19915-21cyclictest08:48:141
19921993127,3cyclictest19915-21cyclictest08:48:141
19921993126,4cyclictest729-21dbus-daemon08:02:521
19921993126,4cyclictest729-21dbus-daemon08:02:521
19921993126,3cyclictest19878-21needreboot08:38:091
19921993126,3cyclictest19878-21needreboot08:38:091
19921993115,12cyclictest700-21192.168.115.40-manager12:26:191
19921993115,12cyclictest700-21192.168.115.40-manager12:26:191
19921993114,15cyclictest700-21192.168.115.40-manager11:31:481
19921993114,15cyclictest700-21192.168.115.40-manager11:31:481
19920993123,6cyclictest29985-21netstat11:58:100
19920993123,6cyclictest29985-21netstat11:58:100
19920993123,6cyclictest29154-21sshd07:38:040
19920993123,6cyclictest29154-21sshd07:38:040
19920993123,6cyclictest14699-21latency_hist09:52:520
19920993123,6cyclictest14699-21latency_hist09:52:520
19920993123,6cyclictest14699-21latency_hist09:52:520
75712300,3sleep00-21swapper/010:58:110
61602300,5sleep30-21swapper/312:22:573
19921993026,3cyclictest19915-21cyclictest12:28:121
19921993026,3cyclictest19915-21cyclictest12:28:121
19921993025,4cyclictest29601-21gltestperf11:58:061
19921993023,5cyclictest29640-21kernelversion07:38:081
19921993023,5cyclictest29640-21kernelversion07:38:081
19921993018,9cyclictest700-21192.168.115.40-manager11:13:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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