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2026-07-16 - 14:15

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 Thu Jul 16, 2026 12:43:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63637995138,10cyclictest185753-21ps11:30:480
63638995037,8cyclictest0-21swapper/109:45:431
6364099475,37cyclictest203817-21ssh12:00:472
63640994738,5cyclictest96687-21systemd-run09:00:022
63637994734,9cyclictest12650irq/32-eth010:55:480
63638994634,7cyclictest3451713-21cups-browsed10:20:541
63637994641,3cyclictest1003-21mta-sts-daemon10:53:060
63637994639,3cyclictest0-21swapper/007:40:010
63640994435,6cyclictest134380-21mailstats10:05:502
63640994435,5cyclictest84648-21systemd-run08:20:012
6364099443,35cyclictest125069-21ssh09:50:462
63638994234,5cyclictest185731-21/usr/sbin/munin11:30:481
63638994232,6cyclictest140723-21unixbench_multi10:15:531
63637994234,6cyclictest0-21swapper/012:30:020
63637994228,11cyclictest98194-21systemd-run09:05:020
63640994133,5cyclictest202671-21systemd12:00:022
6363799414,30cyclictest140165-21ssh10:15:410
63637994134,4cyclictest92110-21cron08:45:000
63637994134,4cyclictest92110-21cron08:45:000
63637994133,5cyclictest207345-21unixbench_singl12:05:550
63637994128,10cyclictest175405-21munin-plugin-st11:15:000
6363799411,30cyclictest112982-21ssh09:30:440
63638994031,6cyclictest265-21systemd-journal11:15:001
63638994030,7cyclictest215251-21aten_r2power_po12:20:291
63638994030,6cyclictest65144-21systemd-run07:15:011
63638994030,6cyclictest65144-21systemd-run07:15:011
63637994032,5cyclictest67265-21sshd07:20:380
63637994030,4cyclictest1000-21mta-sts-daemon09:45:590
63637994028,9cyclictest420-21avahi-daemon10:32:490
63640993931,5cyclictest209395-21ssh12:10:372
63640993930,5cyclictest142103-21munin-run10:20:002
63640993928,8cyclictest157281-21idleruntime-cro10:45:012
63638993931,5cyclictest1-21systemd08:45:011
63638993931,5cyclictest1-21systemd08:45:011
63637993930,5cyclictest188977-21threads11:35:520
63637993928,7cyclictest78774-21latency_hist08:00:020
63638993829,6cyclictest1-21systemd12:15:011
63638993829,5cyclictest158568-21sendmail_mailqu10:45:491
63637993831,4cyclictest1003-21mta-sts-daemon11:45:460
63637993831,4cyclictest1003-21mta-sts-daemon11:45:460
63637993830,5cyclictest420-21avahi-daemon09:17:410
63637993830,5cyclictest178469-21systemd-run11:20:010
63637993829,6cyclictest151ktimers/008:50:420
63640993729,5cyclictest77137-21systemd-run07:55:012
63640993729,5cyclictest265-21systemd-journal11:10:002
63640993729,5cyclictest265-21systemd-journal11:10:002
63638993728,6cyclictest70153-21fschecks_time07:30:331
63637993730,4cyclictest127121-21latency_hist09:55:020
63637993729,5cyclictest160294-21munin-run10:50:010
63637993729,4cyclictest0-21swapper/011:55:460
63637993725,7cyclictest121014-21sort09:45:020
63637993720,3cyclictest171rcu_preempt10:35:460
63637993714,16cyclictest81113-21sshd08:05:480
63640993631,2cyclictest0-21swapper/212:40:012
63640993628,5cyclictest116411-21timerwakeupswit09:35:542
63638993630,4cyclictest63636-21cyclictest12:30:011
63638993629,5cyclictest136053-21cron10:10:011
63638993628,5cyclictest95154-21latency_hist08:55:001
63638993628,5cyclictest130422-21aten_r2power_cu10:00:311
63638993628,4cyclictest0-21swapper/111:00:431
63638993610,5cyclictest28-21ksoftirqd/111:40:411
63637993628,6cyclictest3451713-21cups-browsed10:41:590
63637993627,6cyclictest420-21avahi-daemon12:32:050
63637993627,6cyclictest3451713-21cups-browsed09:10:320
63637993621,2cyclictest171rcu_preempt07:50:450
63640993530,2cyclictest0-21swapper/211:20:012
63640993526,6cyclictest487-21rs:main2
63640993526,6cyclictest487-21rs:main2
63640993526,6cyclictest0-21swapper/210:40:012
63638993527,5cyclictest98195-21unin-run09:05:021
63638993527,5cyclictest175915-21aten_r2power_po11:15:311
63638993527,5cyclictest0-21swapper/108:40:011
63638993525,7cyclictest93665-21/usr/sbin/munin08:50:011
6363799353,22cyclictest109971-21ssh09:25:470
63637993527,5cyclictest90604-21munin-run08:40:000
63637993525,8cyclictest1000-21mta-sts-daemon10:07:180
63637993525,7cyclictest193588-21cut11:45:020
63640993425,6cyclictest421-21dbus-daemon08:10:012
63638993427,4cyclictest137763-21unixbench_singl10:10:541
63638993424,6cyclictest104408-21unixbench_singl09:15:541
63637993427,3cyclictest0-21swapper/012:15:300
63637993424,7cyclictest198014-21switchtime11:50:510
63637993420,9cyclictest12650irq/32-eth010:25:430
63637993412,3cyclictest171rcu_preempt08:45:450
63640993327,3cyclictest0-21swapper/209:50:012
63640993326,4cyclictest114845-21ssh09:35:012
63640993324,6cyclictest420-21avahi-daemon09:10:432
6364099332,24cyclictest118990-21ssh09:40:432
63638993326,4cyclictest188465-21missed_timers11:35:371
63638993326,4cyclictest1001-21mta-sts-daemon08:15:441
63638993326,4cyclictest1000-21mta-sts-daemon09:11:451
63638993325,5cyclictest73147-21fschecks_count07:40:341
63638993325,5cyclictest66676-21latency_hist07:20:011
63638993325,5cyclictest66676-21latency_hist07:20:011
6363899331,28cyclictest164419-21ssh10:55:441
6363899331,22cyclictest206786-21ssh12:05:441
63637993326,5cyclictest63636-21cyclictest12:10:470
63637993325,5cyclictest439-21systemd-logind10:00:010
63637993325,4cyclictest0-21swapper/011:00:520
63637993324,7cyclictest64329-21sshd07:10:380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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