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2025-09-18 - 22:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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.

Total number of samples: 50 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 highest latencies:
System rack9slot8s.osadl.org (updated Thu Sep 18, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501750,0irq/46-4a10000011247-21kworker/0:007:08:020
122199911829,0cyclictest25182-21runrttasks08:33:010
122199911713,0cyclictest13450-21sshd12:00:390
122199911611,0cyclictest32138-21ssh09:13:010
122199911529,0cyclictest26761-21ssh10:10:130
12219991138,0cyclictest1915-21ssh09:17:400
122199911331,0cyclictest17247-21apt-config09:49:590
122199911330,0cyclictest14828-21rs:main0
122199911229,0cyclictest12531-21ssh10:49:260
122199911213,0cyclictest20048-21munin-run07:59:540
122199911128,0cyclictest20206-21readlink07:59:580
122199911124,0cyclictest7677-21munin-plugin-st09:29:540
122199911110,0cyclictest17741-21ssh09:50:510
122199911045,0cyclictest81850irq/46-4a10000011:42:140
122199911043,0cyclictest81850irq/46-4a10000012:35:020
122199911029,0cyclictest7354-21ssh11:47:440
122199911028,0cyclictest26193-21sendmail-msp08:39:540
122199910930,0cyclictest7810-21ssh10:39:200
122199910923,0cyclictest18752-21ssh11:02:370
122199910920,0cyclictest30860-21sshd11:28:380
122199910827,0cyclictest32207-21ssh10:21:570
122199910827,0cyclictest30616-21diskmemload11:21:450
122199910827,0cyclictest12499-21kworker/u2:007:15:090
122199910817,0cyclictest31353-21ssh12:38:570
122199910813,0cyclictest3286-21ssh11:39:060
122199910810,0cyclictest22787-21seq11:11:130
122199910728,0cyclictest18219-21ssh12:10:480
122199910725,0cyclictest21419-21sshd08:07:280
122199910723,0cyclictest22082-21ssh12:19:120
122199910721,0cyclictest16316-21ssh12:06:470
122199910720,0cyclictest3559-21ssh10:30:010
12219991069,0cyclictest27005-21ssh12:29:420
122199910636,0cyclictest81850irq/46-4a10000011:55:570
122199910627,0cyclictest10265-21ssh11:54:050
122199910626,0cyclictest20858-21ssh09:57:400
122199910622,0cyclictest23430-21sh12:21:560
122199910532,0cyclictest1398-21latency_hist11:35:010
122199910522,0cyclictest12327-21ssh09:39:460
122199910520,0cyclictest14290-21ssh10:53:100
122199910513,0cyclictest5190-21ssh09:24:400
122199910510,0cyclictest10313-21ssh10:44:420
12219991049,0cyclictest1377-21ssh10:25:210
122199910438,0cyclictest81850irq/46-4a10000009:09:560
122199910430,0cyclictest15215-21kworker/u2:207:29:530
122199910426,0cyclictest19604-21kworker/u2:108:19:530
122199910425,0cyclictest28199-21runrttasks08:53:280
122199910412,0cyclictest25163-21rm10:06:500
122199910324,0cyclictest24042-21latency_hist08:24:530
122199910323,0cyclictest19224-21runrttasks07:54:210
122199910321,0cyclictest15215-21kworker/u2:207:29:520
122199910320,0cyclictest24699-21ssh11:15:170
122199910313,0cyclictest24139-21ssh10:04:470
122199910224,0cyclictest81950irq/47-4a10000007:39:530
122199910218,0cyclictest18501-21sshd07:49:260
122199910218,0cyclictest17843-21/usr/sbin/munin07:44:520
122199910217,0cyclictest20468-21ssh11:06:150
122199910213,0cyclictest17201-21ssh10:59:250
122199910126,0cyclictest7828-21ssh09:30:030
122199910126,0cyclictest29090-21ssh10:15:140
122199910125,0cyclictest12899-21sh09:40:450
122199910111,0cyclictest12943-21munin-run07:14:510
12219999914,0cyclictest29883-21munin-run09:04:550
12219999814,0cyclictest23962-21munin-run08:24:520
12219999810,0cyclictest26486-21sshd08:41:290
12219999715,0cyclictest27655-21munin-run08:49:530
12219999713,0cyclictest22464-21munin-run08:14:530
12219999513,0cyclictest14304-21sshd07:20:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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