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2026-08-17 - 20:29

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 Mon Aug 17, 2026 12:44:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
217242920,2sleep1281ktimers/112:20:041
217242920,2sleep1281ktimers/112:20:041
139912920,1sleep10-21swapper/110:34:081
59132890,2sleep15915-21latency_hist10:13:581
59132890,2sleep15915-21latency_hist10:13:581
153682790,2sleep10-21swapper/107:44:111
153682790,2sleep10-21swapper/107:44:111
307892740,3sleep10-21swapper/111:19:061
307892740,3sleep10-21swapper/111:19:061
298972640,3chrt0-21swapper/308:24:053
103022630,3sleep30-21swapper/311:49:153
103022630,3sleep30-21swapper/311:49:153
200982610,2chrt0-21swapper/107:58:551
60822590,2sleep16128-21fschecks_count10:14:071
12322590,5sleep11228-21apt-config09:59:141
12322590,5sleep11228-21apt-config09:59:141
177832460,2sleep117785-21latency10:44:091
177832460,2sleep117785-21latency10:44:091
23682450,3sleep10-21swapper/110:04:051
3485994315,5cyclictest271rcuc/109:22:271
3485994315,5cyclictest271rcuc/109:22:271
226372430,3chrt0-21swapper/110:58:521
226372430,3chrt0-21swapper/110:58:521
290302420,2sleep20-21swapper/211:14:102
290302420,2sleep20-21swapper/211:14:102
241092420,3sleep30-21swapper/312:28:593
241092420,3sleep30-21swapper/312:28:593
122432410,2chrt12242-21df_inode09:04:031
141122370,2sleep114115-21cpuspeed09:09:011
3485993528,5cyclictest14678-21systemd-journal09:33:511
201472350,3sleep20-21swapper/209:24:062
115542350,1sleep011592-21ntp_states07:34:100
51622340,2sleep15201-21idleruntime-cro11:38:531
51622340,2sleep15201-21idleruntime-cro11:38:531
348599337,6cyclictest281ktimers/112:08:241
3485993327,5cyclictest23144-21gltestperf10:59:041
3485993327,5cyclictest23144-21gltestperf10:59:041
3485993325,5cyclictest281ktimers/112:36:551
3485993325,5cyclictest281ktimers/112:36:551
3485993325,5cyclictest281ktimers/109:57:211
3485993312,5cyclictest271rcuc/112:24:541
3485993312,5cyclictest271rcuc/112:24:541
3478993326,5cyclictest13259-21latency_hist10:33:510
3478993326,5cyclictest13259-21latency_hist10:33:510
130302330,2sleep20-21swapper/209:04:122
3485993226,4cyclictest18302-21latency_hist12:13:521
3485993225,4cyclictest281ktimers/109:38:491
3485993224,6cyclictest545-21in:imuxsock09:49:041
3485993224,6cyclictest11257-21threads08:59:131
3485993224,6cyclictest11257-21threads08:59:131
3478993226,4cyclictest3477-21cyclictest07:54:050
3478993226,4cyclictest26902-21sendmail09:43:510
3478993226,4cyclictest26902-21sendmail09:43:510
348599317,4cyclictest271rcuc/108:09:471
3485993127,3cyclictest90-1pr/ttyS009:27:501
3485993125,5cyclictest29316-21mailstats11:14:141
3485993125,5cyclictest29316-21mailstats11:14:141
3485993123,5cyclictest281ktimers/110:42:211
3485993123,5cyclictest281ktimers/110:42:211
3485993122,3cyclictest181rcu_preempt08:32:211
3485993117,3cyclictest90-1pr/ttyS011:24:091
3485993117,3cyclictest90-1pr/ttyS011:24:091
3485993117,3cyclictest90-1pr/ttyS008:00:441
3485993117,3cyclictest90-1pr/ttyS008:00:441
3478993124,5cyclictest8643-21processes10:19:110
3478993124,5cyclictest8643-21processes10:19:110
3478993124,5cyclictest25364-21unixbench_singl12:29:160
3478993124,5cyclictest25364-21unixbench_singl12:29:160
3478993123,6cyclictest550-21cron11:48:510
202772310,2sleep120278-21latency_hist12:18:561
67752300,3chrt0-21swapper/210:14:152
348599309,9cyclictest29-21ksoftirqd/112:43:371
348599309,9cyclictest29-21ksoftirqd/112:43:371
348599309,4cyclictest281ktimers/110:22:361
348599309,4cyclictest281ktimers/110:22:361
3485993022,6cyclictest1354-21kernelversion08:34:061
348599301,5cyclictest700-21192.168.115.40-manager11:31:231
348599301,5cyclictest700-21192.168.115.40-manager11:31:231
348599299,17cyclictest281ktimers/108:42:481
348599299,17cyclictest281ktimers/108:42:481
3485992922,4cyclictest0-21swapper/110:29:041
3485992922,4cyclictest0-21swapper/110:29:041
3485992921,3cyclictest181rcu_preempt11:51:551
3485992921,3cyclictest181rcu_preempt11:51:551
3485992919,2cyclictest181rcu_preempt09:40:521
3485992919,2cyclictest181rcu_preempt09:40:521
3485992915,4cyclictest90-1pr/ttyS008:49:081
3485992913,4cyclictest181rcu_preempt10:24:091
3485992913,4cyclictest181rcu_preempt10:24:091
3478992923,4cyclictest3477-21cyclictest10:59:020
3478992923,4cyclictest3477-21cyclictest10:59:020
3478992923,3cyclictest0-21swapper/009:23:510
3478992923,3cyclictest0-21swapper/009:23:510
3478992912,4cyclictest90-1pr/ttyS012:22:540
3478992912,4cyclictest90-1pr/ttyS012:22:540
137312290,3sleep30-21swapper/310:34:063
348599288,8cyclictest29-21ksoftirqd/108:20:141
348599288,8cyclictest29-21ksoftirqd/108:20:141
348599283,5cyclictest281ktimers/111:58:241
348599283,5cyclictest281ktimers/111:58:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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