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2026-05-16 - 17:59

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.
Unexpectedly long latencies may be caused by SMIs
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 Sat May 16, 2026 12:43:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2845134995446,5cyclictest2979858-21timerandwakeup11:11:031
2845134995446,5cyclictest2979858-21timerandwakeup11:11:031
2845135995347,3cyclictest0-21swapper/209:25:532
2845135995347,3cyclictest0-21swapper/209:25:532
2845135995243,6cyclictest2949816-21munin-plugin-st10:35:002
2845135995243,6cyclictest2848163-21kworker/u8:6-nfsiod08:19:242
284513499495,34cyclictest2898724-21ssh09:31:001
284513499495,34cyclictest2898724-21ssh09:31:001
2845134994837,8cyclictest2889244-21idleruntime-cro09:20:011
2845133994737,7cyclictest2894460-21needreboot09:25:500
2845133994737,7cyclictest2894460-21needreboot09:25:500
2845135994640,3cyclictest0-21swapper/209:40:002
2845134994639,3cyclictest0-21swapper/111:15:571
2845134994639,3cyclictest0-21swapper/111:15:571
284513399465,33cyclictest2947236-21ssh10:30:590
2845134994537,5cyclictest421-21dbus-daemon12:15:021
2845134994535,6cyclictest3018546-21latency_hist12:00:031
2845134994535,6cyclictest3018546-21latency_hist12:00:031
284513499451,33cyclictest2922822-21ssh10:00:541
284513399453,30cyclictest2902629-21ssh09:35:550
2845133994514,24cyclictest624-21lldpd08:45:530
2845135994436,5cyclictest2863186-21systemd-run08:10:012
2845134994438,3cyclictest0-21swapper/110:21:001
2845135994338,2cyclictest0-21swapper/211:20:012
2845135994338,2cyclictest0-21swapper/211:20:012
2845134994337,3cyclictest0-21swapper/108:00:011
2845134994336,3cyclictest0-21swapper/112:00:511
2845133994336,4cyclictest2980066-21unixbench_singl11:11:040
2845133994336,4cyclictest2980066-21unixbench_singl11:11:040
2845133994334,6cyclictest695-21cron10:55:010
284513399433,33cyclictest2955380-21ssh10:41:050
2845135994234,4cyclictest0-21swapper/210:25:562
2845135994233,6cyclictest2858666-21grep07:55:012
2845135994233,6cyclictest261-21systemd-journal12:20:022
2845135994231,8cyclictest3018402-21systemd-run12:00:012
2845135994231,8cyclictest3018402-21systemd-run12:00:012
2845134994234,5cyclictest2961950-21ssh10:50:011
2845134994234,5cyclictest2867709-21systemd-run08:25:011
2845134994234,5cyclictest2867709-21systemd-run08:25:011
284513399427,27cyclictest428-21mta-sts-daemon08:05:530
2845133994231,8cyclictest3050610-21ssh12:40:010
2845135994133,5cyclictest3039969-21ld12:25:592
2845135994133,4cyclictest0-21swapper/210:00:012
2845133994134,4cyclictest2974051-21sh11:05:010
2845133994132,6cyclictest420-21avahi-daemon11:51:560
2845135994030,8cyclictest3026455-21ssh12:10:022
2845135994030,8cyclictest3002346-21systemd-run11:40:012
2845134994034,3cyclictest0-21swapper/109:35:541
2845134994031,6cyclictest2854206-21systemd-run07:40:021
2845134994030,7cyclictest3036027-21ssh12:21:011
2845134994029,7cyclictest2001030-21cups-browsed11:29:101
2845133994031,5cyclictest151ktimers/008:20:520
2845133994031,5cyclictest151ktimers/008:20:520
2845133994030,8cyclictest3023638-21needreboot12:05:510
2845133994027,6cyclictest12350irq/32-eth011:15:580
2845133994027,6cyclictest12350irq/32-eth011:15:580
2845133994021,15cyclictest3031777-21ssh12:15:530
2845135993931,5cyclictest2901301-21systemd-run09:35:012
2845135993931,5cyclictest2901301-21systemd-run09:35:012
2845135993930,6cyclictest0-21swapper/210:40:012
2845135993927,9cyclictest547-21gmain10:18:532
2845135993927,9cyclictest547-21gmain10:18:532
284513599392,29cyclictest2967386-21ssh10:55:572
2845134993932,3cyclictest0-21swapper/112:35:011
2845134993929,6cyclictest2918575-21missed_timers09:55:481
2845133993932,5cyclictest1-21systemd09:45:010
2845133993928,4cyclictest0-21swapper/010:20:010
2845133993928,4cyclictest0-21swapper/010:20:010
2845133993924,12cyclictest2866172-21munin-plugin-st08:20:000
2845135993831,4cyclictest2872036-21unixbench_multi08:36:062
2845135993830,5cyclictest2860175-21sendmail08:00:012
2845134993830,5cyclictest3047431-21sh12:35:451
2845133993832,3cyclictest0-21swapper/008:05:010
2845133993829,6cyclictest2891131-21unixbench_multi09:21:050
2845133993829,6cyclictest2001030-21cups-browsed12:10:560
2845133993828,5cyclictest0-21swapper/011:40:010
2845135993730,4cyclictest3022403-21cron12:05:012
2845135993729,5cyclictest2867703-21systemd-run08:25:012
2845135993729,5cyclictest2867703-21systemd-run08:25:012
2845135993728,5cyclictest2978111-21idleruntime-cro11:10:012
2845134993731,3cyclictest0-21swapper/112:15:591
2845134993730,3cyclictest0-21swapper/111:50:551
2845134993729,4cyclictest0-21swapper/109:15:011
2845134993728,5cyclictest0-21swapper/111:46:101
284513399372,27cyclictest2975398-21ssh11:05:540
284513399372,26cyclictest2943044-21ssh10:25:520
284513399371,30cyclictest2987661-21rm11:21:010
2845135993630,3cyclictest0-21swapper/211:35:012
2845135993627,5cyclictest2889215-21ssh09:20:012
284513499363,29cyclictest2995514-21ssh11:30:521
2845134993629,4cyclictest0-21swapper/111:10:021
2845134993629,3cyclictest0-21swapper/111:01:011
2845134993628,5cyclictest2875109-21unixbench_singl08:46:041
2845134993628,3cyclictest0-21swapper/110:25:551
2845134993624,8cyclictest420-21avahi-daemon10:55:321
284513499362,26cyclictest2910684-21ssh09:45:541
2845134993622,10cyclictest2915158-21timerandwakeup09:51:051
2845134993618,3cyclictest171rcu_preempt10:05:551
2845133993630,4cyclictest0-21swapper/012:01:050
2845133993629,4cyclictest2918831-21ntp_offset09:55:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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