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2026-07-12 - 08:20

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 Sun Jul 12, 2026 00:43:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4144362995741,3cyclictest171rcu_preempt23:30:442
4144362995446,5cyclictest4174359-21systemd-run20:50:012
414436099532,45cyclictest151ktimers/022:35:400
4144362994738,6cyclictest53601-21kworker/u8:10-xprtiod23:25:012
4144362994738,6cyclictest47281-21munin-run22:50:012
4144362994637,6cyclictest101904-21ssh00:20:012
4144362994636,5cyclictest1003-21mta-sts-daemon23:50:432
4144362994624,5cyclictest171rcu_preempt23:35:412
414436199467,28cyclictest17961-21ssh22:00:391
4144362994535,6cyclictest4180346-21idleruntime-cro21:10:012
4144362994534,7cyclictest0-21swapper/223:45:392
4144361994536,6cyclictest4171368-21systemd-run20:40:011
4144360994534,5cyclictest12750irq/33-eth020:45:440
4144362994432,8cyclictest2395397-21cups-browsed20:25:472
4144361994435,5cyclictest1000-21mta-sts-daemon22:55:451
4144360994429,10cyclictest151ktimers/020:00:410
4144362994328,11cyclictest4187508-21awk21:20:392
4144362994326,11cyclictest1-21systemd21:35:022
4144361994335,4cyclictest1000-21mta-sts-daemon23:14:011
414436099425,28cyclictest90964-21sh00:00:440
4144362994133,5cyclictest13894-21latency_hist21:55:022
4144362994129,7cyclictest2395397-21cups-browsed21:45:482
4144360994132,6cyclictest0-21swapper/023:00:010
4144362994021,14cyclictest351ktimers/220:15:382
4144361994034,3cyclictest0-21swapper/100:20:011
4144361994033,4cyclictest4151868-21systemd-run19:35:011
4144361994032,5cyclictest68537-21grep23:25:001
4144361994032,5cyclictest4172846-21munin-plugin-st20:45:011
4144361994031,6cyclictest1002-21mta-sts-daemon22:41:591
4144361994030,7cyclictest421-21dbus-daemon21:20:411
4144360994030,5cyclictest0-21swapper/022:30:450
4144360994018,18cyclictest151ktimers/021:10:460
414436299394,29cyclictest48441-21ssh22:50:432
4144362993930,5cyclictest4183538-21latency_hist21:15:022
4144362993930,5cyclictest4161360-21fschecks_count20:05:352
4144362993930,4cyclictest0-21swapper/222:30:012
4144362993929,7cyclictest59433-21systemd-run23:10:012
4144362993926,10cyclictest35927-21kernelversion22:30:342
4144361993928,4cyclictest1002-21mta-sts-daemon22:10:031
4144360993932,4cyclictest81981-21mailstats23:45:480
4144360993932,4cyclictest4156366-21systemd-run19:50:010
4144360993932,4cyclictest4156366-21systemd-run19:50:010
4144360993930,5cyclictest420-21avahi-daemon22:50:230
4144362993830,5cyclictest1002-21mta-sts-daemon23:58:342
4144362993829,6cyclictest95875-21munin-run00:10:012
4144362993829,6cyclictest265-21systemd-journal22:00:012
414436199384,28cyclictest75753-21sh23:35:441
4144361993831,4cyclictest16882-21latency_hist22:00:011
4144361993830,5cyclictest30317-21proc_pri22:20:471
4144361993830,5cyclictest29045-21munin-run22:20:011
4144361993829,5cyclictest4149555-21latency19:25:371
4144361993827,8cyclictest11813-21needreboot21:50:371
4144362993728,6cyclictest71572-21rm23:30:012
4144362993727,7cyclictest694-21cron20:15:012
4144362993727,6cyclictest106366-21switchtime00:25:502
4144361993731,2cyclictest0-21swapper/100:35:011
4144361993728,6cyclictest1-21systemd23:45:021
4144360993731,4cyclictest4163801-21kworker/u8:5-xprtiod21:00:010
4144360993727,7cyclictest4149664-21needreboot19:25:380
4144360993725,9cyclictest61100-21grep23:10:510
4144360993723,8cyclictest70186-21unixbench_multi23:25:520
4144360993720,14cyclictest421-21dbus-daemon22:02:290
4144362993628,5cyclictest26004-21cron22:15:002
4144362993627,6cyclictest420-21avahi-daemon22:20:512
4144362993626,6cyclictest7951-21latency_hist21:45:032
4144362993626,4cyclictest0-21swapper/222:55:432
4144362993625,5cyclictest0-21swapper/221:15:422
4144361993630,3cyclictest0-21swapper/120:20:021
4144361993627,6cyclictest4154867-21systemd-run19:45:011
4144361993627,6cyclictest4145834-21cron19:15:011
4144361993627,3cyclictest0-21swapper/120:30:441
4144361993625,4cyclictest0-21swapper/100:10:471
4144360993624,9cyclictest4192595-21munin-run21:30:020
4144360993623,10cyclictest1000-21mta-sts-daemon21:35:410
414436099360,28cyclictest11954-21ssh21:50:420
4144362993528,5cyclictest4144359-21cyclictest19:30:412
4144362993527,5cyclictest4176922-21mailstats20:55:502
4144362993527,4cyclictest1001-21mta-sts-daemon23:15:122
4144362993525,3cyclictest0-21swapper/222:35:512
4144361993528,4cyclictest1003-21mta-sts-daemon20:10:381
4144361993527,5cyclictest56383-21cron23:05:011
4144361993527,4cyclictest1002-21mta-sts-daemon23:19:181
4144361993526,5cyclictest89824-21cups-browsed00:00:031
4144361993525,7cyclictest665-21snmpd21:00:381
4144361993525,4cyclictest0-21swapper/123:45:401
4144360993530,3cyclictest0-21swapper/019:20:010
4144360993527,5cyclictest4175824-21sh20:55:010
4144360993526,6cyclictest2494265-21munin-node00:15:270
4144360993512,17cyclictest12650irq/32-eth023:55:400
4144362993426,5cyclictest2952-21systemctl21:35:462
4144362993426,5cyclictest23020-21latency_hist22:10:012
4144362993426,5cyclictest23020-21latency_hist22:10:012
4144362993422,9cyclictest60817-21switchtime23:10:492
4144361993427,5cyclictest108025-21systemd-run00:30:021
4144361993427,4cyclictest1000-21mta-sts-daemon23:34:531
4144361993426,5cyclictest439-21systemd-logind21:50:011
4144361993426,5cyclictest114062-21ssh00:40:011
4144361993422,9cyclictest4175834-21munin-plugin-st20:55:011
414436099342,5cyclictest8817-21ssh21:45:380
4144360993425,6cyclictest89824-21cups-browsed00:20:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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