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2026-08-22 - 14:56

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 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.

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 Aug 22, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2523621070,3sleep20-21swapper/208:59:112
2523621070,3sleep20-21swapper/208:59:112
753921030,3chrt0-21swapper/311:04:143
172872770,3sleep00-21swapper/011:29:200
10402740,2sleep01042-21grep09:19:190
10402740,2sleep01042-21grep09:19:190
29652680,3sleep02968-21latency_hist10:54:020
29652680,3sleep02968-21latency_hist10:54:020
37692670,1sleep13767-21grep10:54:151
72902660,2sleep17291-21/usr/sbin/munin08:09:211
72902660,2sleep17291-21/usr/sbin/munin08:09:211
199702610,4sleep20-21swapper/208:44:162
199702610,4sleep20-21swapper/208:44:162
175562580,3sleep30-21swapper/310:04:163
34312570,3sleep30-21swapper/307:59:183
34312570,3sleep30-21swapper/307:59:183
40492550,2chrt4050-21/usr/sbin/munin09:29:120
40492550,2chrt4050-21/usr/sbin/munin09:29:120
253292540,3sleep025333-21latency_hist11:53:560
74822500,4sleep20-21swapper/211:04:132
197232500,2sleep30-21swapper/311:38:563
3732400,2sleep10-21swapper/107:54:021
325712390,3sleep30-21swapper/310:44:163
292232390,2sleep029277-21ntp_kernel_pll_09:09:150
292232390,2sleep029277-21ntp_kernel_pll_09:09:150
155732390,2sleep30-21swapper/308:34:083
299452380,3chrt0-21swapper/110:39:081
299452380,3chrt0-21swapper/110:39:081
66312370,2sleep30-21swapper/311:03:583
66312370,2sleep30-21swapper/311:03:583
310302370,3chrt0-21swapper/309:14:113
137672370,3sleep10-21swapper/109:54:131
137672370,3sleep10-21swapper/109:54:131
87472360,9sleep1281ktimers/108:14:161
52142360,2sleep10-21swapper/110:59:111
52142360,2sleep10-21swapper/110:59:111
320612350,3sleep20-21swapper/212:09:182
320612350,3sleep20-21swapper/212:09:182
223822350,3sleep20-21swapper/210:19:082
223822350,3sleep20-21swapper/210:19:082
18339993527,6cyclictest27023-21gltestperf09:04:090
18339993527,6cyclictest27023-21gltestperf09:04:090
125832350,2sleep012683-21switchtime08:24:170
125832350,2sleep012683-21switchtime08:24:170
50652340,2sleep30-21swapper/308:04:173
287682340,3sleep00-21swapper/010:34:170
287682340,3sleep00-21swapper/010:34:170
190362340,3sleep3431rcuc/308:43:563
190362340,3sleep3431rcuc/308:43:563
18340993325,6cyclictest16408-21cut11:29:111
18340993226,4cyclictest30797-21gltestperf09:14:091
18340993225,5cyclictest8391-21threads09:39:171
18340993225,5cyclictest8391-21threads09:39:171
18340993225,5cyclictest8391-21threads09:39:171
18339993218,12cyclictest0-21swapper/009:14:080
90242310,3sleep20-21swapper/212:34:182
90242310,3sleep20-21swapper/212:34:182
18340993126,4cyclictest15822-21gltestperf08:34:101
18340993122,6cyclictest30205-21latency_hist09:13:561
18340993122,6cyclictest30205-21latency_hist09:13:561
18339993124,5cyclictest3749-21netstat10:54:150
18339993123,6cyclictest25049-21cut08:59:100
18339993123,6cyclictest25049-21cut08:59:100
18340993026,3cyclictest24343-21cpuspeed10:24:071
18340993025,3cyclictest18334-21cyclictest11:18:391
18340993025,3cyclictest1648-21ntpd08:54:151
18340993023,5cyclictest26300-21cut10:29:091
18340993023,5cyclictest18334-21cyclictest09:54:031
18340993022,6cyclictest27582-21fschecks_count11:59:091
18340993022,6cyclictest27582-21fschecks_count11:59:091
18340993021,7cyclictest21889-21processes08:49:151
18340993021,7cyclictest21889-21processes08:49:151
18339993026,3cyclictest60-21kcompactd007:54:390
134932300,4sleep20-21swapper/208:29:002
134932300,4sleep20-21swapper/208:29:002
198082290,3chrt0-21swapper/211:38:592
18340992924,4cyclictest5853-21latency_hist08:08:551
18339992924,3cyclictest90-1pr/ttyS011:05:390
18339992924,3cyclictest545-21in:imuxsock10:08:570
18339992923,5cyclictest15171-21fschecks_time09:59:100
18339992923,4cyclictest0-21swapper/008:34:180
274112280,3sleep20-21swapper/209:04:142
274112280,3sleep20-21swapper/209:04:142
243622280,3chrt0-21swapper/208:56:062
190102280,3sleep20-21swapper/208:43:552
190102280,3sleep20-21swapper/208:43:552
18340992824,3cyclictest11890-21ntp_offset09:49:151
18340992822,5cyclictest18570-21kernelversion11:34:121
18340992821,5cyclictest8462-21latency_hist11:08:561
18340992821,5cyclictest550-21cron11:28:561
18340992821,5cyclictest550-21cron11:28:561
18340992821,5cyclictest2307-21/usr/sbin/munin07:59:191
18340992821,5cyclictest2307-21/usr/sbin/munin07:59:191
18340992820,6cyclictest2662-21fschecks_time12:19:091
18340992820,6cyclictest2662-21fschecks_time12:19:091
18339992823,3cyclictest6570-21cron11:03:560
18339992823,3cyclictest6570-21cron11:03:560
18339992820,6cyclictest31718-21ntp_kernel_err07:49:140
18339992820,6cyclictest22553-21ntpq11:44:140
18339992820,6cyclictest22553-21ntpq11:44:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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