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2025-08-29 - 12:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Fri Aug 29, 2025 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63677122130,2sleep375-21kworker/3:1+events21:15:353
509248997359,10cyclictest779495-21apt-get23:40:001
509246995446,5cyclictest561376-21kworker/u8:2+flush-8:021:10:290
509246995138,10cyclictest276-21systemd-journal20:55:000
509248994734,6cyclictest276-21systemd-journal22:43:211
509246994739,6cyclictest694286-21ntpq22:10:340
5827122460,1sleep0582715-21kthreadcore20:20:310
509246994636,8cyclictest798623-21ntpq23:55:360
509248994535,8cyclictest803546-21ntpq00:00:331
509248994533,10cyclictest674453-21ntpq21:50:411
509248994533,10cyclictest674453-21ntpq21:50:411
509248994435,7cyclictest571068-21latency_hist20:10:011
509246994436,6cyclictest521263-21/usr/sbin/munin19:20:360
509248994322,12cyclictest660551-21munin-plugin-st21:40:001
509246994335,5cyclictest561376-21kworker/u8:2+flush-8:021:15:320
509256994237,4cyclictest561376-21kworker/u8:2+flush-8:023:45:312
509248994131,7cyclictest809419-21latency_hist00:10:001
509248994130,8cyclictest276-21systemd-journal19:25:001
509246994133,6cyclictest589902-21ntpq20:25:380
509246994133,6cyclictest276-21systemd-journal20:07:390
509248993931,5cyclictest541378-21apt-get19:40:231
509248993929,8cyclictest788740-21ntpq23:45:371
509246993930,6cyclictest625911-21kworker/u8:0+flush-8:021:20:430
509246993929,7cyclictest650628-21latency_hist21:30:020
509246993928,8cyclictest580946-21latency_hist20:20:010
509256993832,4cyclictest729462-21kworker/u8:3+flush-8:000:30:412
509248993828,7cyclictest276-21systemd-journal23:00:501
509246993830,6cyclictest526358-21cat19:25:020
509246993830,6cyclictest526358-21cat19:25:010
509256993730,5cyclictest276-21systemd-journal22:30:002
509248993729,6cyclictest581208-21/usr/sbin/munin20:20:341
509248993718,7cyclictest828304-21ntpq00:25:391
509246993727,8cyclictest808478-21ntpq00:05:370
509246993724,10cyclictest561376-21kworker/u8:2+flush-8:020:55:210
7883962360,6sleep3451irq_work/323:45:333
509248993632,3cyclictest561376-21kworker/u8:2+flush-8:023:55:211
509248993628,6cyclictest753948-21ntpq23:10:391
509248993628,6cyclictest675649-21apt-get21:55:231
509248993627,7cyclictest829482-21apt-get00:30:221
509248993620,7cyclictest665805-21apt-get21:45:251
509248993528,5cyclictest526499-21apt-get19:25:221
509248993528,5cyclictest526499-21apt-get19:25:221
509248993527,6cyclictest276-21systemd-journal00:20:001
509248993510,16cyclictest755056-21cut23:15:241
509246993526,6cyclictest714991-21latency_hist22:35:010
509246993525,7cyclictest561376-21kworker/u8:2+flush-8:000:15:400
509256993430,3cyclictest561376-21kworker/u8:2+events_unbound00:05:452
509248993424,8cyclictest0-21swapper/121:40:311
509248993423,8cyclictest625886-21latency_hist21:05:011
509256993325,6cyclictest276-21systemd-journal21:15:002
50924899336,16cyclictest0-21swapper/120:55:301
509248993326,5cyclictest552409-21kthreadcore19:50:331
50924899331,10cyclictest586173-21apt-get20:25:251
509256993227,4cyclictest561376-21kworker/u8:2+flush-8:022:40:422
509248993227,3cyclictest705654-21fschecks_count22:25:281
509248993224,6cyclictest644751-21ntpq21:20:391
509248993223,6cyclictest276-21systemd-journal20:19:501
509248993220,4cyclictest161rcu_preempt20:33:451
509248993217,8cyclictest421rcuog/222:24:321
509246993227,4cyclictest536118-21kworker/u8:1+flush-8:019:40:470
509246993227,3cyclictest765181-21cpuspeed_turbos23:25:270
509246993225,5cyclictest759710-21latency_hist23:20:010
509246993222,7cyclictest3847907-21kworker/u8:0+flush-8:019:30:380
5089392323,9sleep10-21swapper/119:08:231
509256993127,3cyclictest561376-21kworker/u8:2+flush-8:021:15:502
509248993126,3cyclictest735153-21base6422:55:011
509248993125,4cyclictest700193-21systemd-run22:20:001
509248993121,8cyclictest728882-21ntpq22:45:351
509248993114,10cyclictest0-21swapper/120:37:151
509248993112,8cyclictest773893-21switchtime23:30:411
50924899310,4cyclictest838246-21ntpq00:35:421
509246993123,6cyclictest623470-21cut21:00:350
509246993122,7cyclictest609867-21ntpq20:45:350
509246993122,7cyclictest609867-21ntpq20:45:350
509256993025,4cyclictest561376-21kworker/u8:2+flush-8:022:35:412
509256993024,4cyclictest625911-21kworker/u8:0+events_unbound23:20:282
509256993021,7cyclictest799488-21awk00:00:002
50924899305,14cyclictest0-21swapper/123:41:501
509248993025,3cyclictest793577-21needreboot23:50:351
509248993024,4cyclictest536376-21apt-get19:35:231
509248993022,5cyclictest276-21systemd-journal20:00:501
509248993019,8cyclictest276-21systemd-journal22:35:011
509248993010,7cyclictest611871-21sed20:50:311
509246993026,2cyclictest0-21swapper/021:55:410
509246993025,4cyclictest536118-21kworker/u8:1+flush-8:020:02:210
509256992925,3cyclictest561376-21kworker/u8:2+flush-8:021:30:372
509256992925,3cyclictest561376-21kworker/u8:2+flush-8:020:55:372
50924899295,14cyclictest0-21swapper/123:25:381
50924899295,14cyclictest0-21swapper/100:20:271
50924899295,13cyclictest0-21swapper/121:35:011
509248992925,2cyclictest556997-21irqcore19:55:311
509248992923,4cyclictest764278-21unixbench_singl23:20:441
509248992920,7cyclictest276-21systemd-journal19:20:001
50924899290,17cyclictest645963-21apt-get21:25:231
50924899290,17cyclictest546808-21df19:45:261
509246992924,3cyclictest509121-21kworker/u8:3+events_unbound19:15:010
509246992921,6cyclictest561376-21kworker/u8:2+flush-8:021:30:270
509256992821,5cyclictest779495-21apt-get23:40:002
50924899285,13cyclictest0-21swapper/122:07:501
50924899285,12cyclictest0-21swapper/122:33:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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