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2026-05-17 - 11:41

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 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.

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 792 highest latencies:
System rack9slot8s.osadl.org (updated Sun May 17, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
351501740,0irq/20-490000005545-21kworker/0:219:07:590
73039912749,0cyclictest81950irq/46-4a10000000:10:000
81950720,0irq/46-4a10000022173-21apt-get00:15:310
81950720,0irq/46-4a10000012086-21snmpd21:52:450
81950700,0irq/46-4a1000007655-21munin-run22:45:030
81950700,0irq/46-4a10000021242-21apt-get00:10:320
81950690,0irq/46-4a1000002755-1kworker/u3:322:15:000
81950690,0irq/46-4a10000011366-21seq23:05:330
35150690,0irq/20-4900000021031-21sshd20:38:040
81950680,0irq/46-4a100000561-21kswapd022:45:320
81950680,0irq/46-4a10000011008-21munin-run23:05:000
81950680,0irq/46-4a10000010689-21apt-get19:30:360
81950670,0irq/46-4a10000016162-1kworker/u3:223:45:570
82050660,0irq/47-4a10000014475-21kworker/u2:523:30:020
81950650,0irq/46-4a1000008940-21runrttasks22:50:330
81950640,0irq/46-4a10000013724-1kworker/u3:023:22:450
81950640,0irq/46-4a10000011553-21kworker/u2:723:15:010
81950630,0irq/46-4a10000021614-1kworker/u3:020:50:020
81950610,0irq/46-4a10000012941-1kworker/u3:123:30:310
81950610,0irq/46-4a1000000-21swapper20:29:000
7303996150,0cyclictest81950irq/46-4a10000023:45:020
7303996049,0cyclictest81950irq/46-4a10000021:20:010
7303996049,0cyclictest81950irq/46-4a10000000:00:020
94750590,0irq/33-mmc05498-1kworker/0:0H20:57:580
81950580,0irq/46-4a10000012086-21snmpd19:17:350
7303995846,0cyclictest81950irq/46-4a10000020:20:010
7303995841,0cyclictest16650-21latency_hist23:40:030
7303995727,0cyclictest0-21swapper21:07:340
94750560,0irq/33-mmc07301-21cyclictest19:22:570
81950560,0irq/46-4a1000000-21swapper21:03:570
7303995511,0cyclictest12086-21snmpd00:23:170
7303995443,0cyclictest81950irq/46-4a10000019:38:580
7303995242,0cyclictest81950irq/46-4a10000023:00:010
7303995239,0cyclictest81950irq/46-4a10000022:39:570
7303995236,0cyclictest0-21swapper21:57:000
35150520,0irq/20-490000000-21swapper22:28:310
94750510,0irq/33-mmc025683-1kworker/0:1H21:38:040
7303995141,0cyclictest101ktimersoftd/021:48:180
7303995134,0cyclictest5921-21runrttasks22:33:180
7303995132,0cyclictest21514-21runrttasks20:40:500
7303995130,0cyclictest7256-21kworker/u2:119:15:050
7303995040,0cyclictest81950irq/46-4a10000021:30:010
7303995034,0cyclictest27916-21runrttasks21:22:530
7303995033,0cyclictest13400-21kworker/u2:120:00:020
7303995029,0cyclictest2230-21runrttasks22:08:260
7303994937,0cyclictest81950irq/46-4a10000020:09:580
7303994934,0cyclictest26713-21latency_hist21:15:020
7303994934,0cyclictest0-21swapper00:26:000
7303994933,0cyclictest4123-21runrttasks22:20:370
7303994933,0cyclictest17042-21runrttasks20:10:510
7303994933,0cyclictest15460-21latency_hist20:00:040
7303994932,0cyclictest12113-21runrttasks23:17:490
7303994932,0cyclictest12113-21runrttasks22:19:510
7303994932,0cyclictest1152-21runrttasks22:00:470
7303994931,0cyclictest28919-21cron21:30:030
7303994834,0cyclictest12606-21runrttasks19:40:540
7303994833,0cyclictest18572-21runrttasks20:21:030
7303994833,0cyclictest12113-21runrttasks00:01:160
7303994832,0cyclictest23234-21runrttasks20:51:160
7303994832,0cyclictest12113-21runrttasks00:35:580
7303994831,0cyclictest25237-21runrttasks00:34:150
7303994831,0cyclictest13473-21sshd19:46:570
7303994831,0cyclictest12113-21runrttasks19:27:590
7303994828,0cyclictest20017-21runrttasks20:30:510
7303994737,0cyclictest81950irq/46-4a10000021:42:190
7303994732,0cyclictest12113-21runrttasks19:50:430
7303994731,0cyclictest12113-21runrttasks23:50:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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