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2025-07-15 - 22:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 50 highest latencies:
System rack7slot7s.osadl.org (updated Tue Jul 15, 2025 12:43:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2169529582,9sleep30-21swapper/307:06:203
2196929480,10sleep10-21swapper/107:09:531
2169727966,9sleep00-21swapper/007:06:220
2191327666,6sleep20-21swapper/207:09:102
246192640,2sleep124626-21turbostat.cron07:15:001
206242570,0sleep00-21swapper/009:40:560
2207899270,27cyclictest0-21swapper/212:24:112
2207299271,25cyclictest20877-21ssh10:10:150
2207299260,3cyclictest0-21swapper/011:00:160
2208199250,24cyclictest0-21swapper/312:10:173
2207899250,23cyclictest0-21swapper/210:41:122
2207899241,23cyclictest0-21swapper/211:23:162
2207299240,3cyclictest0-21swapper/011:22:100
2207899230,22cyclictest0-21swapper/210:48:232
2207899230,22cyclictest0-21swapper/210:48:222
22081992219,2cyclictest94-21kswapd009:59:393
2207899220,20cyclictest0-21swapper/211:55:242
2207299221,2cyclictest14825-21diskmemload12:15:400
2207899210,21cyclictest0-21swapper/210:35:182
2207299214,1cyclictest0-21swapper/011:50:330
2207299212,1cyclictest12580-21ssh09:35:180
22072992121,0cyclictest0-21swapper/010:54:370
2207299211,2cyclictest14186-21grep12:35:160
2207299210,0cyclictest0-21swapper/011:34:100
2207899200,18cyclictest0-21swapper/212:30:122
2207299202,1cyclictest3345-21aten2_r7power_p09:55:170
2207299201,4cyclictest9944-21apt-get12:10:180
2207299200,1cyclictest0-21swapper/011:35:380
2207899192,14cyclictest32-21ksoftirqd/211:30:142
2207899190,17cyclictest0-21swapper/210:29:232
22075991916,1cyclictest0-21swapper/111:50:191
2207299195,1cyclictest14382-21perf11:50:000
2207299192,3cyclictest26641-21latency_hist09:20:000
2207299192,3cyclictest14825-21diskmemload10:21:190
2207299191,4cyclictest20331-21grep10:35:290
2207299191,2cyclictest10975-21grep09:00:200
2207299190,8cyclictest0-21swapper/010:19:510
2207299190,4cyclictest15920-21fschecks_count09:10:170
2207299190,2cyclictest0-21swapper/009:48:500
2207299190,16cyclictest0-21swapper/007:25:160
310212180,0chrt0-21swapper/209:50:202
22081991817,1cyclictest0-21swapper/310:08:293
2208199180,18cyclictest0-21swapper/312:17:103
2208199180,18cyclictest0-21swapper/311:54:493
2208199180,18cyclictest0-21swapper/311:40:293
2208199180,18cyclictest0-21swapper/310:42:493
2208199180,18cyclictest0-21swapper/309:18:303
2207899184,8cyclictest224-21systemd-journal09:13:352
2207599180,18cyclictest0-21swapper/111:20:561
2207299182,2cyclictest0-21swapper/010:27:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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