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2025-07-01 - 00:39

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 Mon Jun 30, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818502010,0irq/46-4a10000013882-21kworker/0:107:08:280
81950890,0irq/47-4a10000032220-21ssh10:32:150
81950870,0irq/47-4a10000020083-21ssh10:00:160
81950870,0irq/47-4a10000015128-21ssh11:12:110
81950870,0irq/47-4a10000012266-21munin-run11:04:580
81950870,0irq/47-4a10000011420-21ssh09:37:380
81950860,0irq/47-4a1000008971-21ssh10:56:100
81950860,0irq/47-4a10000028322-21ssh10:22:150
81950850,0irq/47-4a1000008920-21ssh12:14:120
81950850,0irq/47-4a10000017419-21ssh11:17:580
81850850,0irq/46-4a1000007095-21modprobe12:10:010
245192859,0sleep024526-21ssh11:35:290
81950840,0irq/47-4a1000002314-21ssh10:39:130
81950840,0irq/47-4a10000019603-21ssh11:23:530
81850840,0irq/46-4a10000030753-21munin-run11:50:010
81950830,0irq/47-4a1000009887-21ssh09:33:480
81950830,0irq/47-4a1000006493-21ssh10:50:000
81950830,0irq/47-4a10000024197-21ssh11:34:590
81950830,0irq/47-4a1000001762-21ssh11:57:510
81950830,0irq/47-4a1000001712-21snmpd07:24:390
81950830,0irq/47-4a10000014165-21ssh09:45:030
81950820,0irq/47-4a1000003779-21ssh09:17:280
81950820,0irq/47-4a10000032493-21idleruntime-cro09:04:530
81950820,0irq/47-4a10000032247-21rm11:53:250
81950820,0irq/47-4a1000003032-21ssh12:00:350
81950820,0irq/47-4a10000029123-21kworker/u2:208:49:540
81950820,0irq/47-4a10000025123-21rm10:14:030
81950820,0irq/47-4a10000023075-21rm10:08:280
81950820,0irq/47-4a10000023025-21sshd08:00:300
81950820,0irq/47-4a10000016409-21ssh09:50:520
81950810,0irq/47-4a1000007314-1kworker/u3:109:28:040
81950810,0irq/47-4a1000005451-21ssh09:21:400
81950810,0irq/47-4a1000005449-21kworker/u2:709:44:350
81950810,0irq/47-4a1000004658-21rm10:45:030
81950810,0irq/47-4a10000029873-21kworker/u2:410:27:090
81950810,0irq/47-4a10000026960-21ssh11:41:040
81950810,0irq/47-4a10000026231-21rm10:16:470
81950810,0irq/47-4a10000019071-21rm12:37:310
81950810,0irq/47-4a10000016287-21kworker/u2:107:25:020
81950810,0irq/47-4a10000015854-21ntp_states07:14:570
81950810,0irq/47-4a10000014498-21ssh12:26:520
81950810,0irq/47-4a10000012385-21ssh11:05:020
81950810,0irq/47-4a10000011682-21ssh12:20:170
81950810,0irq/47-4a10000011443-21kworker/u2:312:32:450
81950810,0irq/47-4a10000011059-21ssh12:19:060
305102810,0chrt27598-21kworker/u2:408:51:020
10642818,0sleep01070-21ssh09:10:240
81950800,0irq/47-4a100000800-21latency_hist09:09:560
81950800,0irq/47-4a1000003846-21sh10:43:010
81950800,0irq/47-4a10000031243-21kworker/u2:508:59:550
81950800,0irq/47-4a10000028777-21munin-run08:39:530
81950800,0irq/47-4a10000022630-21sshd07:58:290
81950800,0irq/47-4a10000021248-21ssh11:27:570
81950800,0irq/47-4a10000018814-21sshd07:32:280
81950800,0irq/47-4a10000018766-21ssh09:57:020
294532790,0sleep029123-21kworker/u2:208:44:230
81950780,0irq/47-4a10000026876-21sshd08:26:310
81950780,0irq/47-4a10000020552-21sshd07:44:290
263802780,0chrt25317-21kworker/u2:008:23:290
248042780,0sleep024570-21kworker/u2:408:12:530
81950770,0irq/47-4a10000025304-21runrttasks08:15:590
81950770,0irq/47-4a10000014764-21kworker/u2:307:14:500
81950760,0irq/47-4a10000014764-21kworker/u2:307:49:540
210172740,0sleep020905-21kworker/u2:107:47:160
81950730,0irq/47-4a10000023776-21sshd08:05:290
192592730,0chrt18014-21kworker/u2:407:35:070
101630,0ktimersoftd/028029-21sh08:34:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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