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2026-04-17 - 06:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Fri Apr 17, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292962238162,23sleep10-21swapper/119:09:211
291552232158,24sleep20-21swapper/219:07:292
291732228155,25sleep00-21swapper/019:07:430
293202219144,24sleep30-21swapper/319:09:393
29439991070,105cyclictest0-21swapper/221:22:182
172282750,2sleep00-21swapper/021:05:220
29439995753,3cyclictest0-21swapper/221:59:572
77772550,4sleep230-21rcuc/223:10:252
226102520,1sleep00-21swapper/020:05:140
74132470,3sleep17416-21gltestperf19:30:151
58252470,2sleep10-21swapper/100:20:201
156692450,2sleep339-21rcuc/319:50:123
29439994326,8cyclictest0-21swapper/222:49:282
2942499356,13cyclictest20349-21munin-run21:15:010
2942499356,13cyclictest19716-21sadc20:00:010
2942499316,11cyclictest0-21swapper/019:30:010
2942499316,11cyclictest0-21swapper/019:30:010
2942499315,12cyclictest12829-21perf23:25:010
2943999302,9cyclictest11153-21/usr/sbin/munin19:40:232
2942499305,12cyclictest15339-21awk19:50:010
270302300,3sleep011-21rcuc/023:55:170
2943299291,18cyclictest0-21swapper/121:55:491
29424992911,15cyclictest4019-21perf23:05:010
2943299281,17cyclictest0-21swapper/121:28:021
249362280,4sleep123-21ksoftirqd/123:50:211
160352280,1sleep00-21swapper/021:05:010
2943299272,11cyclictest9082-21munin-run00:30:011
29432992711,7cyclictest0-21swapper/122:35:161
2943299270,18cyclictest0-21swapper/100:35:241
67922260,3sleep06795-21fschecks_count23:10:150
2943299268,9cyclictest0-21swapper/122:30:021
2943299262,17cyclictest5356-21kworker/u8:122:15:441
2943299261,16cyclictest0-21swapper/122:00:051
29432992610,3cyclictest15329-21munin-run19:50:011
2942499262,8cyclictest30226-21kworker/0:200:03:180
2942499261,12cyclictest20977-21awk22:30:010
2944599250,11cyclictest0-21swapper/321:30:573
2943299258,10cyclictest0-21swapper/123:09:441
2943299253,18cyclictest6166-21strings20:40:191
2943299253,18cyclictest6166-21strings20:40:191
2943299251,18cyclictest5356-21kworker/u8:123:04:251
2943299251,17cyclictest0-21swapper/122:52:491
2943299251,17cyclictest0-21swapper/122:48:081
2943299251,17cyclictest0-21swapper/119:40:151
2943299251,16cyclictest0-21swapper/121:18:401
2942499252,9cyclictest9118-21kworker/0:320:53:010
2942499252,9cyclictest6863-21kworker/0:000:28:290
2942499252,8cyclictest4639-21kworker/0:100:24:530
2942499252,8cyclictest25766-21kworker/0:323:54:490
2942499251,12cyclictest1810-21idleruntime-cro23:00:010
2942499251,12cyclictest1810-21idleruntime-cro23:00:010
29445992417,4cyclictest3601-21grep20:35:163
2943299246,2cyclictest87350irq/126-enp1s0-19:20:151
2943299242,8cyclictest808-21snmpd21:00:111
29432992420,3cyclictest0-21swapper/120:23:531
2943299241,17cyclictest0-21swapper/123:39:441
2943299241,17cyclictest0-21swapper/121:52:351
2943299241,16cyclictest0-21swapper/123:40:271
2943299241,16cyclictest0-21swapper/121:47:131
2943299241,15cyclictest827-21runrttasks20:15:501
2942499242,9cyclictest31250-21kworker/0:119:18:250
2942499242,9cyclictest21856-21kworker/0:020:13:210
2942499242,8cyclictest880-21kworker/0:221:46:290
2942499242,8cyclictest23744-21kworker/0:000:14:170
2942499241,11cyclictest10522-21kworker/0:123:28:330
2942499241,10cyclictest2593-21kworker/0:220:55:050
2942499241,10cyclictest19547-21kworker/0:220:00:030
2944599235,10cyclictest11085-21unixbench_multi20:50:263
2944599231,13cyclictest31731-21ntp_states00:05:213
2944599231,13cyclictest31731-21ntp_states00:05:213
2943999239,2cyclictest4013-21awk23:05:012
29439992319,2cyclictest31716-21ntpq00:05:202
29439992319,2cyclictest31716-21ntpq00:05:202
2943999231,7cyclictest0-21swapper/221:14:092
2943299238,3cyclictest26317-21munin-run20:15:011
2943299232,3cyclictest87550irq/128-enp1s0-23:10:181
2943299232,11cyclictest4952-21munin-run20:40:011
29432992319,3cyclictest0-21swapper/121:22:541
29432992319,3cyclictest0-21swapper/120:45:401
29432992319,2cyclictest27261-21cpuspeed_turbos21:30:121
2943299231,19cyclictest21863-21hddtemp_smartct22:30:161
2943299231,19cyclictest0-21swapper/119:55:191
2943299231,16cyclictest0-21swapper/122:44:511
2943299231,16cyclictest0-21swapper/100:04:501
2943299231,15cyclictest827-21runrttasks22:20:551
29432992311,4cyclictest0-21swapper/123:26:431
2943299230,7cyclictest32089-21fschecks_time21:40:151
2943299230,6cyclictest0-21swapper/100:09:591
2943299230,6cyclictest0-21swapper/100:09:591
2943299230,15cyclictest0-21swapper/123:59:441
2943299230,15cyclictest0-21swapper/122:10:501
2943299230,15cyclictest0-21swapper/100:16:461
2942499232,9cyclictest15124-21kworker/0:319:50:350
2942499232,9cyclictest10903-21kworker/0:219:40:430
2942499232,8cyclictest20303-21kworker/0:121:22:490
2942499231,9cyclictest4639-21kworker/0:100:31:370
2942499231,9cyclictest32722-21kworker/0:020:32:250
2942499231,8cyclictest28806-21kworker/0:021:37:450
2942499231,8cyclictest18058-21kworker/0:021:16:490
2944599227,3cyclictest0-21swapper/323:43:053
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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