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2026-06-07 - 12:17

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 376 highest latencies:
System rack2slot7s.osadl.org (updated Sun Jun 07, 2026 06:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2637016996050,7cyclictest3289984-21expr06:12:220
2637017995747,5cyclictest2859362-21context106:02:391
2637017995747,5cyclictest2859362-21context106:02:391
2637017995727,5cyclictest0-21swapper/106:12:191
2637018995643,9cyclictest3289640-21sh06:12:162
2637017995529,3cyclictest0-21swapper/105:51:111
2637016995446,5cyclictest421-21dbus-daemon06:25:010
2637017995040,6cyclictest2832892-21systemd-run05:35:011
2637017994939,5cyclictest0-21swapper/106:20:011
2637017994737,6cyclictest2638517-21systemd-run05:10:011
2637017994637,6cyclictest2855545-21execl05:50:031
2637016994637,7cyclictest2855884-21fstime05:53:530
2637016994631,12cyclictest2849083-21sh05:41:340
263701899445,6cyclictest171rcu_preempt05:46:022
2637018994436,5cyclictest3280895-21sh06:10:072
2637018994436,5cyclictest3280895-21sh06:10:072
2637017994436,5cyclictest3273284-21Run06:08:131
2637017994436,5cyclictest3273284-21Run06:08:131
2637016994436,6cyclictest3269572-21Run06:06:130
2637016994436,6cyclictest3269572-21Run06:06:130
2637018994335,5cyclictest3077238-21spawn06:04:022
2637018994335,5cyclictest3077238-21spawn06:04:022
2637017994335,5cyclictest2849589-21grep05:41:481
2637017994132,6cyclictest2637027-21systemd-run05:05:011
2637017994129,9cyclictest3298632-21sh06:25:011
2637016993932,5cyclictest3247858-21spawn06:04:430
2637016993932,5cyclictest3247858-21spawn06:04:430
2637016993932,5cyclictest0-21swapper/006:35:010
2637018993831,5cyclictest2637015-21cyclictest05:50:272
2637018993831,4cyclictest0-21swapper/205:25:012
2637018993828,7cyclictest3303152-21systemctl06:40:012
2637016993831,4cyclictest151ktimers/005:11:070
2637018993729,5cyclictest2849629-21sh05:41:492
2637016993728,4cyclictest0-21swapper/005:56:080
2637017993629,4cyclictest2641984-21kworker/u8:3-rpciod05:40:011
2637017993626,7cyclictest2857673-21latency_hist06:00:021
2637016993623,11cyclictest2855545-21execl05:50:020
2637018993529,3cyclictest0-21swapper/205:40:022
2637018993514,9cyclictest351ktimers/205:26:022
2637017993427,3cyclictest0-21swapper/105:11:101
2637016993313,4cyclictest14-21ksoftirqd/006:16:000
2637018993226,3cyclictest0-21swapper/205:35:012
2637018993224,5cyclictest3298494-21unixbench_multi06:21:172
2637018993224,5cyclictest3297088-21munin-plugin-st06:20:012
2637016993226,3cyclictest2643722-21latency_hist05:30:020
2637018993123,4cyclictest2857445-21fstime05:56:322
2637018993120,8cyclictest2637035-21latency_hist05:05:022
2637017993123,5cyclictest3299132-21fschecks_count06:25:571
263701699319,3cyclictest14-21ksoftirqd/006:36:110
2637017993020,4cyclictest0-21swapper/105:28:561
2637018992922,4cyclictest2640702-21if_wlan005:15:592
2637017992921,5cyclictest3301550-21grep06:31:161
2637016992923,4cyclictest151ktimers/006:25:030
263701699292,24cyclictest2833649-21syscall05:36:000
2637018992822,4cyclictest3300124-21journal-offline06:30:012
2637018992819,6cyclictest2638511-21systemd-run05:10:012
2637017992817,8cyclictest3302549-21ntp_kernel_pll_06:36:071
263701699287,4cyclictest14-21ksoftirqd/005:06:060
2637016992822,4cyclictest2637021-21systemd-run05:05:010
2637016992821,4cyclictest2716558-21spawn05:34:020
2637016992821,3cyclictest0-21swapper/005:16:040
2637017992715,8cyclictest421-21dbus-daemon05:25:021
2637016992718,6cyclictest0-21swapper/005:25:020
2637018992519,3cyclictest0-21swapper/205:14:592
2637018992420,2cyclictest0-21swapper/206:32:002
2637017992212,7cyclictest261-21systemd-journal05:17:191
263701999203,9cyclictest0-21swapper/305:44:493
263701999193,11cyclictest0-21swapper/305:57:193
263701999171,10cyclictest0-21swapper/306:12:043
263701999163,7cyclictest0-21swapper/306:05:293
263701999163,7cyclictest0-21swapper/306:05:293
263701999152,8cyclictest0-21swapper/305:50:553
263701999151,7cyclictest0-21swapper/305:06:053
263701999141,8cyclictest0-21swapper/305:46:063
263701999141,6cyclictest0-21swapper/305:25:583
263701999132,7cyclictest0-21swapper/306:25:013
263701999132,7cyclictest0-21swapper/305:35:533
263701999132,6cyclictest0-21swapper/305:33:433
263701999131,8cyclictest0-21swapper/306:00:413
263701999131,8cyclictest0-21swapper/306:00:413
263701999121,7cyclictest0-21swapper/306:35:593
263701999121,6cyclictest0-21swapper/306:26:063
263701999121,6cyclictest0-21swapper/306:16:003
263701999111,6cyclictest0-21swapper/305:10:553
263701999111,5cyclictest0-21swapper/306:31:023
263701999102,5cyclictest0-21swapper/305:20:013
26370199991,5cyclictest0-21swapper/305:21:143
26370199982,4cyclictest0-21swapper/305:05:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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