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2025-11-24 - 15:17

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 highest latencies:
System rack9slot8s.osadl.org (updated Mon Nov 24, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501210,0irq/46-4a1000000-21swapper07:05:500
81850860,0irq/46-4a10000022313-21sshd09:34:150
81850820,0irq/46-4a10000024540-21ssh11:57:200
81850820,0irq/46-4a10000013362-21ssh11:33:330
233632810,0sleep012447-21kworker/u2:111:54:560
81850790,0irq/46-4a10000032322-21munin-run11:04:580
81850790,0irq/46-4a10000030441-21ssh09:51:200
81850790,0irq/46-4a10000015386-21ssh09:19:360
81950780,0irq/47-4a10000010788-1kworker/u3:212:38:240
81850780,0irq/46-4a10000028609-21ssh12:05:540
81850780,0irq/46-4a10000028008-21ssh12:04:480
81850780,0irq/46-4a1000002194-21ssh12:18:540
81850780,0irq/46-4a10000019259-21ssh10:36:550
81950770,0irq/47-4a1000009079-21apt-get08:59:570
81950770,0irq/47-4a1000007282-21ssh11:20:260
81850770,0irq/46-4a1000008005-21ssh12:31:060
81850770,0irq/46-4a10000032744-21ssh09:56:170
81850770,0irq/46-4a1000002146-21ssh11:09:500
223432770,0sleep021335-21kworker/u2:610:43:350
81950760,0irq/47-4a10000027080-21sshd09:44:160
81850760,0irq/46-4a1000005799-21runrttasks11:17:240
81850760,0irq/46-4a1000005015-21ssh12:24:540
81850760,0irq/46-4a10000031442-21ssh12:11:590
81850760,0irq/46-4a10000031425-21rm07:55:030
81850760,0irq/46-4a1000002757-21ssh10:01:320
61852760,0chrt4718-21kworker/u2:408:41:030
81950750,0irq/47-4a1000004464-21latency_hist08:29:540
81950750,0irq/47-4a10000010215-21runrttasks09:05:330
81850750,0irq/46-4a1000009653-21kworker/u2:409:11:420
81850750,0irq/46-4a1000009516-21runrttasks10:16:010
81850750,0irq/46-4a1000002580-21ssh11:10:130
81850750,0irq/46-4a10000011172-21ssh11:28:530
230702750,0chrt18773-21kworker/u2:409:35:420
142812750,0sleep010049-21kworker/u2:011:35:210
81950740,0irq/47-4a1000007005-21ssh12:29:070
81950740,0irq/47-4a10000026436-21ssh10:52:180
81950740,0irq/47-4a10000026023-21kworker/u2:710:09:290
81950740,0irq/47-4a10000014813-21ssh10:27:240
81850740,0irq/46-4a10000021022-21ssh11:49:560
81850740,0irq/46-4a10000017915-21ssh11:43:120
81850740,0irq/46-4a10000011456-21ssh10:20:050
80602740,0chrt7737-21kworker/u2:408:54:210
288002740,0chrt28498-21kworker/u2:307:39:210
246572740,0sleep024307-21kworker/u2:407:14:100
81950730,0irq/47-4a10000016929-21ssh09:22:360
81850730,0irq/46-4a1000009079-21apt-get09:00:270
81850730,0irq/46-4a10000022022-21kworker/u2:107:15:030
81950720,0irq/47-4a10000026258-21kworker/u2:507:29:520
81850720,0irq/46-4a10000029561-21ssh10:59:050
81850720,0irq/46-4a1000002675-21kworker/u2:210:14:250
71492720,0chrt6987-21kworker/u2:008:47:540
50222720,0sleep04718-21kworker/u2:408:33:420
290072720,0sleep023535-21kworker/u2:309:48:210
277882720,0chrt27753-21kworker/u2:207:32:030
24692720,0chrt30648-21kworker/u2:108:16:020
241512720,0sleep023721-21kworker/u2:010:47:230
81950710,0irq/47-4a1000003714-21apt08:24:530
81950710,0irq/47-4a10000032369-21kworker/u2:208:09:570
81950710,0irq/47-4a10000026679-21sh07:24:500
81850710,0irq/46-4a1000002675-21kworker/u2:210:33:470
294052710,0sleep029151-21kworker/u2:407:43:060
81950690,0irq/47-4a10000010270-21kworker/u2:609:24:590
299052690,0chrt29151-21kworker/u2:407:46:090
81950680,0irq/47-4a10000030640-21sshd07:51:110
81850680,0irq/46-4a10000032369-21kworker/u2:208:09:530
24040994832,0cyclictest24038-21cyclictest08:00:020
24040994831,0cyclictest24038-21cyclictest08:35:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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