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2026-08-21 - 00:52

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 Thu Aug 20, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
830721540,2sleep30-21swapper/310:24:183
3134521320,2chrt0-21swapper/308:34:113
3134521320,2chrt0-21swapper/308:34:113
362221100,3sleep20-21swapper/211:39:142
362221100,3sleep20-21swapper/211:39:142
297562910,2sleep129759-21fschecks_count11:24:051
297562910,2sleep129759-21fschecks_count11:24:051
237752880,4sleep30-21swapper/308:14:093
237752880,4sleep30-21swapper/308:14:093
4382800,3sleep20-21swapper/210:04:152
140522570,3sleep00-21swapper/007:49:060
40832530,2sleep30-21swapper/310:14:133
252162510,1chrt0-21swapper/008:19:040
252162510,1chrt0-21swapper/008:19:040
196722490,3sleep20-21swapper/208:04:072
307922440,3sleep20-21swapper/208:34:062
307922440,3sleep20-21swapper/208:34:062
103562440,3sleep20-21swapper/211:59:042
103562440,3sleep20-21swapper/211:59:042
102712440,2chrt0-21swapper/107:39:061
102712440,2chrt0-21swapper/107:39:061
118912430,1sleep112079-21unixbench_multi10:34:181
1180994334,7cyclictest15707-21idleruntime-cro12:13:540
1180994334,7cyclictest15707-21idleruntime-cro12:13:540
154012420,2chrt15394-21ntp_states10:44:120
27662410,3sleep20-21swapper/210:09:212
85612400,2sleep08405-21/usr/sbin/munin11:54:080
251712390,3sleep20-21swapper/212:38:592
227812370,1sleep00-21swapper/011:04:110
227812370,1sleep00-21swapper/011:04:110
227812370,1sleep00-21swapper/011:04:110
1186993629,5cyclictest31624-21mailstats08:34:161
1186993629,5cyclictest31624-21mailstats08:34:161
1180993632,3cyclictest11808-21latency_hist07:43:540
1180993632,3cyclictest11808-21latency_hist07:43:540
215012350,1chrt21500-21users10:59:171
215012350,1chrt21500-21users10:59:171
271122340,2sleep127113-21/usr/sbin/munin08:24:041
1186993427,5cyclictest12002-21latency09:09:091
94062330,3sleep10-21swapper/109:03:561
94062330,3sleep10-21swapper/109:03:561
1180993328,3cyclictest1177-21cyclictest11:49:160
1180993328,3cyclictest1177-21cyclictest11:49:160
1180993327,4cyclictest18166-21wc10:53:540
1180993326,5cyclictest1177-21cyclictest09:34:350
188342320,3sleep30-21swapper/310:54:083
188342320,3sleep30-21swapper/310:54:083
1186993225,5cyclictest18127-21sshd10:53:371
1180993224,6cyclictest749-21runrttasks08:29:050
1180993224,6cyclictest749-21runrttasks08:29:050
1180993224,6cyclictest19296-21sendmail08:03:540
1180993221,3cyclictest181rcu_preempt12:41:080
1180993221,3cyclictest181rcu_preempt12:41:080
1180993118,11cyclictest0-21swapper/008:54:090
187212300,6sleep118861-21timerwakeupswit12:19:141
187212300,6sleep118861-21timerwakeupswit12:19:141
187212300,6sleep118861-21timerwakeupswit12:19:141
1186993023,5cyclictest19029-21sshd08:00:371
1180993023,5cyclictest545-21in:imuxsock10:21:310
1180993023,5cyclictest545-21in:imuxsock10:21:310
1180993023,5cyclictest2777-21ntp_kernel_err08:44:140
1180993023,5cyclictest2777-21ntp_kernel_err08:44:140
106602300,2sleep30-21swapper/310:33:543
106602300,2sleep30-21swapper/310:33:543
1186992924,3cyclictest0-21swapper/107:44:171
1186992923,4cyclictest1177-21cyclictest08:04:051
1186992922,4cyclictest0-21swapper/107:54:131
1180992923,5cyclictest5759-21timerwakeupswit11:44:160
1180992923,4cyclictest32038-21/usr/sbin/munin10:04:090
1180992921,6cyclictest12344-21gltestperf07:44:070
1180992920,7cyclictest21878-21latency_hist11:03:540
1180992920,7cyclictest21878-21latency_hist11:03:540
1186992824,3cyclictest729-21dbus-daemon11:43:541
1186992824,3cyclictest729-21dbus-daemon11:43:541
1186992824,2cyclictest0-21swapper/110:44:141
1186992823,3cyclictest8776-21idleruntime-cro10:28:541
1186992823,3cyclictest22430-21gltestperf11:04:071
1186992823,3cyclictest22430-21gltestperf11:04:071
1186992823,3cyclictest22430-21gltestperf11:04:071
1186992822,4cyclictest25729-21if_wlan012:39:091
1186992822,4cyclictest25729-21if_wlan012:39:091
1186992822,4cyclictest1177-21cyclictest07:36:021
1186992821,5cyclictest24511-21latency_hist09:44:021
1186992821,5cyclictest24511-21latency_hist09:44:021
1186992818,8cyclictest572-21cups-browsed08:49:131
1186992818,8cyclictest572-21cups-browsed08:49:131
1180992823,4cyclictest13605-21/usr/sbin/munin10:39:170
1180992823,4cyclictest13605-21/usr/sbin/munin10:39:170
1180992822,5cyclictest19455-21kernelversion09:29:090
1180992821,5cyclictest21675-21cut08:09:090
1180992821,5cyclictest1177-21cyclictest11:32:010
1180992821,5cyclictest1177-21cyclictest11:32:010
1180992821,5cyclictest1177-21cyclictest09:09:140
1180992821,4cyclictest0-21swapper/009:19:160
1180992821,4cyclictest0-21swapper/009:19:160
1180992821,4cyclictest0-21swapper/009:19:160
1180992820,6cyclictest13586-21fschecks_time09:14:070
1180992820,6cyclictest13586-21fschecks_time09:14:070
250952270,3sleep00-21swapper/008:19:000
1186992723,2cyclictest0-21swapper/108:29:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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