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2025-11-20 - 07:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 rack2slot7s.osadl.org (updated Thu Nov 20, 2025 00:39:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2515669995145,3cyclictest0-21swapper/123:45:011
251566999495,39cyclictest2577654-21ssh21:59:201
2515669994939,7cyclictest1-21systemd23:35:021
251566999493,36cyclictest2687841-21ssh00:29:171
2515670994842,3cyclictest0-21swapper/220:20:012
2515668994729,14cyclictest0-21swapper/022:54:180
2515669994536,5cyclictest2695668-21systemd-run00:40:011
2515669994533,7cyclictest2691219-21ssh00:34:161
2515668994537,5cyclictest2541641-21diskmemload23:04:150
2515668994537,5cyclictest2541641-21diskmemload23:04:150
2515669994436,4cyclictest2532653-21sendmail20:40:011
2515669994435,6cyclictest2517201-21latency_hist19:40:011
2515669994435,6cyclictest2517201-21latency_hist19:40:011
2515668994436,5cyclictest2545673-21ssh21:15:010
251566899441,37cyclictest2613938-21ssh22:49:120
2515670994337,3cyclictest0-21swapper/200:30:012
2515670994336,4cyclictest2666914-21munin-run00:00:012
2515669994234,5cyclictest2540141-21cron21:05:011
251566999421,35cyclictest2570249-21ssh21:49:081
2515668994231,8cyclictest2686793-21sshd00:28:340
2515669994133,5cyclictest2563946-21cron21:40:011
2515669994133,4cyclictest1-21systemd19:25:021
2515669994132,6cyclictest2567083-21timerandwakeup21:44:201
2515670994033,4cyclictest2602084-21kworker/u8:15-xprtiod22:55:022
2515670994032,5cyclictest2582150-21systemd-run22:05:022
251567099402,29cyclictest2592043-21ssh22:19:102
2515669994033,4cyclictest2516363-21latency_hist19:20:031
2515669994032,4cyclictest959-21mta-sts-daemon23:08:551
2515669994032,4cyclictest959-21mta-sts-daemon23:08:551
2515669994030,7cyclictest421-21avahi-daemon23:17:371
2515669994029,7cyclictest421-21avahi-daemon21:18:281
2515668994031,6cyclictest2559251-21needreboot21:34:060
2515670993932,4cyclictest2567646-21kworker/u8:12-xprtiod22:09:172
2515670993932,4cyclictest2567646-21kworker/u8:12-xprtiod22:09:172
2515670993931,5cyclictest2695272-21unixbench_multi00:39:242
2515670993930,6cyclictest738385-21cups-browsed21:39:032
2515670993930,6cyclictest1-21systemd23:05:012
2515670993930,6cyclictest1-21systemd23:05:012
2515670993911,6cyclictest171rcu_preempt22:24:122
2515669993935,3cyclictest2515667-21cyclictest21:32:331
2515669993931,5cyclictest2596642-21idleruntime-cro22:25:011
2515669993925,10cyclictest1-21systemd00:10:021
2515668993921,12cyclictest491-21gdbus22:59:140
2515668993918,13cyclictest12450irq/32-eth022:29:140
2515669993831,4cyclictest2596751-21kworker/u8:4-xprtiod23:04:011
2515669993831,4cyclictest2596751-21kworker/u8:4-xprtiod23:04:011
2515669993830,5cyclictest2681600-21sed00:19:251
2515669993829,6cyclictest474-21in:imuxsock22:55:011
2515669993829,6cyclictest2589395-21idleruntime-cro22:15:001
2515669993829,6cyclictest2589395-21idleruntime-cro22:15:001
2515669993829,6cyclictest2516442-21kworker/u8:9-xprtiod21:29:181
2515669993828,6cyclictest2603540-21unixbench-2d22:34:261
2515669993828,5cyclictest0-21swapper/122:49:051
2515668993829,6cyclictest738385-21cups-browsed23:29:440
2515670993728,6cyclictest2548565-21proc_pri21:19:172
251566999376,9cyclictest2632888-21users23:14:231
251566999376,9cyclictest2632888-21users23:14:231
2515669993727,6cyclictest738385-21cups-browsed21:51:541
2515668993731,4cyclictest2516410-21cron19:25:010
2515668993729,5cyclictest2569847-21fschecks_count21:49:010
2515670993630,3cyclictest0-21swapper/221:59:142
2515670993628,5cyclictest2541641-21diskmemload23:19:172
2515670993627,4cyclictest0-21swapper/222:14:082
2515670993627,4cyclictest0-21swapper/222:14:082
251566999363,27cyclictest2581168-21ssh22:04:131
2515669993629,3cyclictest0-21swapper/123:27:331
2515669993628,5cyclictest2607583-21cron22:40:011
2515669993627,6cyclictest738385-21cups-browsed22:43:501
2515669993624,8cyclictest2658236-21missed_timers23:49:121
2515668993630,4cyclictest2663168-21cut23:55:010
2515668993629,4cyclictest2563995-21systemd-run21:40:010
2515668993628,5cyclictest738385-21cups-browsed23:16:080
2515668993628,5cyclictest422-21dbus-daemon21:51:540
2515668993627,6cyclictest2667052-21cups-browsed00:30:560
2515668993626,6cyclictest2667052-21cups-browsed00:24:180
2515668993624,7cyclictest2560762-21kworker/u8:5+xprtiod22:00:020
2515670993528,4cyclictest2678322-21debian-sa100:15:002
2515670993528,4cyclictest2678322-21debian-sa100:15:002
2515670993523,9cyclictest2606466-21missed_timers22:39:082
2515669993528,4cyclictest957-21mta-sts-daemon22:05:061
2515669993528,4cyclictest957-21mta-sts-daemon22:05:061
2515669993528,3cyclictest0-21swapper/100:00:011
2515669993527,5cyclictest2670726-21cron00:05:011
2515669993527,5cyclictest2651861-21latency_hist23:40:021
2515669993514,5cyclictest28-21ksoftirqd/122:19:061
2515668993526,6cyclictest2667052-21cups-browsed00:17:300
251567099348,5cyclictest171rcu_preempt20:09:122
2515670993425,6cyclictest738385-21cups-browsed21:20:182
251567099341,26cyclictest2691242-21ssh00:34:172
2515669993425,4cyclictest0-21swapper/122:29:101
251566999342,26cyclictest2544741-21ssh21:14:141
251566999342,24cyclictest2684390-21ssh00:24:141
2515668993426,5cyclictest2534169-21kworker/u8:15-xprtiod21:45:010
2515668993425,6cyclictest738385-21cups-browsed22:15:240
2515668993423,8cyclictest738385-21cups-browsed19:30:010
2515668993423,8cyclictest738385-21cups-browsed19:30:010
2515668993411,17cyclictest2673551-21ssh00:09:110
2515670993327,3cyclictest0-21swapper/200:24:092
2515670993326,3cyclictest0-21swapper/223:29:132
2515670993325,5cyclictest2566235-21fschecks_time21:44:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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