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2025-12-31 - 16:13

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 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 Wed Dec 31, 2025 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
70092236162,24sleep30-21swapper/307:06:433
70062235162,60sleep00-21swapper/007:06:400
53052203165,25sleep20-21swapper/207:05:092
71752199164,23sleep10-21swapper/107:08:511
242221640,4sleep3737199cyclictest11:50:163
2993121290,3sleep3737199cyclictest09:10:283
1555421160,4sleep3737199cyclictest11:05:213
215732640,1sleep00-21swapper/007:40:110
29492580,2sleep00-21swapper/011:50:210
737199421,23cyclictest17083-21turbostat12:25:013
737199381,25cyclictest29642-21latency_hist11:40:023
737199381,24cyclictest21195-21latency_hist07:40:013
737199380,15cyclictest87250irq/129-enp1s0-09:49:103
737199372,24cyclictest24887-40dnf11:25:313
737199366,13cyclictest12050irq/123-ahci[0009:00:013
7371993618,15cyclictest28418-21grep09:10:013
737199361,26cyclictest1727-21ntp_states09:20:223
737199361,21cyclictest28414-21diskmemload12:35:263
737199361,21cyclictest28414-21diskmemload12:35:263
737199354,21cyclictest12050irq/123-ahci[0009:30:013
737199353,22cyclictest12050irq/123-ahci[0012:05:023
737199351,4cyclictest22666-21/usr/sbin/munin10:10:173
737199351,26cyclictest23684-21cpuspeed_turbos07:45:103
737199351,22cyclictest30212-21/usr/sbin/munin08:00:163
737199351,21cyclictest0-21swapper/308:25:133
737199351,18cyclictest29981-21latency_hist08:00:013
7354993511,12cyclictest0-21swapper/008:00:010
737199345,19cyclictest751-21rngd07:30:393
737199345,16cyclictest12050irq/123-ahci[0012:10:013
737199342,29cyclictest16837-21tr11:10:143
737199341,24cyclictest16065-21/usr/sbin/munin09:55:233
735499346,13cyclictest18664-21munin-run11:15:010
737199333,26cyclictest30329-21ntp_states10:25:233
737199332,21cyclictest32001-21latency_hist11:45:023
737199331,2cyclictest0-21swapper/308:40:113
737199331,29cyclictest17647-21/usr/sbin/munin08:45:203
737199331,28cyclictest29010-40dnf10:24:553
737199331,27cyclictest22493-21ntp_states07:40:203
737199331,24cyclictest25747-21latency10:15:193
737199331,24cyclictest25747-21latency10:15:193
737199331,20cyclictest12246-21unixbench_multi12:10:273
737199330,23cyclictest0-21swapper/310:10:013
737199322,22cyclictest86950irq/126-enp1s0-11:00:263
737199321,28cyclictest7889-21/usr/sbin/munin10:50:223
7358993214,6cyclictest14480-40dnf07:23:331
737199317,14cyclictest0-21swapper/309:40:203
737199316,11cyclictest28414-21diskmemload09:35:153
737199314,14cyclictest87250irq/129-enp1s0-09:50:153
737199311,6cyclictest26994-21processes07:50:243
737199311,6cyclictest26994-21processes07:50:243
7371993115,13cyclictest1124-21wc11:45:253
737199311,22cyclictest16101-21smart_sda07:25:253
735499314,12cyclictest6438-21awk08:20:010
735499313,13cyclictest6094-21idleruntime-cro12:00:010
96622300,14sleep00-21swapper/012:05:220
737199306,11cyclictest87250irq/129-enp1s0-12:15:203
737199302,3cyclictest32423-21/usr/sbin/munin08:05:153
737199301,3cyclictest19288-21/usr/sbin/munin10:00:203
737199301,26cyclictest22420-21/usr/sbin/munin11:20:263
737199301,25cyclictest5169-21ntp_states11:55:223
735499304,12cyclictest19279-21munin-run12:30:010
735499301,20cyclictest10152-21kworker/0:109:58:270
737199292,24cyclictest6944-21smart_sda10:45:233
737199292,23cyclictest9688-21irqstats07:15:023
737199292,16cyclictest87250irq/129-enp1s0-10:41:543
737199291,4cyclictest5076-21/usr/sbin/munin09:30:173
737199291,24cyclictest6651-21/usr/sbin/munin08:20:263
737199291,24cyclictest12058-21latency_hist11:00:023
737199291,17cyclictest87250irq/129-enp1s0-10:30:033
7371992911,15cyclictest24794-21fschecks_time09:00:173
7371992910,16cyclictest13088-21cut07:20:143
735499293,13cyclictest14621-21munin-run07:25:010
737199288,17cyclictest1424-21cut10:35:123
737199288,17cyclictest12409-21latency_hist07:20:023
737199287,18cyclictest14384-21ls08:35:223
737199287,15cyclictest751-21rngd08:51:333
737199282,23cyclictest5372-21memory08:15:203
737199282,23cyclictest18376-21ntp_states12:25:243
737199281,4cyclictest31192-21/usr/sbin/munin09:15:153
737199281,3cyclictest2257-21/usr/sbin/munin08:10:123
737199281,3cyclictest19679-21/usr/sbin/munin11:15:173
7371992812,13cyclictest19696-21cat12:30:133
735899281,11cyclictest24328-21kworker/1:007:40:231
735499282,12cyclictest0-21swapper/009:00:010
735499281,12cyclictest12699-21awk12:15:010
737199272,22cyclictest26034-21perl11:30:173
737199271,23cyclictest11614-21perl08:30:163
735499273,12cyclictest31849-21munin-run11:45:010
735499273,12cyclictest19008-21munin-run07:35:010
735499271,13cyclictest24638-21munin-run10:15:010
736499268,10cyclictest0-21swapper/209:25:142
735899261,16cyclictest26164-21switchtime10:15:251
735899261,16cyclictest26164-21switchtime10:15:251
735899261,15cyclictest0-21swapper/112:36:531
735899261,15cyclictest0-21swapper/112:36:531
735499261,13cyclictest31236-21munin-run10:30:010
735899241,17cyclictest0-21swapper/111:26:551
735899241,16cyclictest9190-21sshd09:39:301
735899241,15cyclictest0-21swapper/111:49:021
7358992410,4cyclictest11236-21awk10:55:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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