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2025-05-03 - 00:00

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 Fri May 02, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1012300,0ktimersoftd/025613-21snmpd07:05:270
81850850,0irq/46-4a10000023236-21ssh11:25:010
81950830,0irq/47-4a10000012573-21ssh10:56:010
81950820,0irq/47-4a1000008427-21rm10:45:120
81950820,0irq/47-4a10000021261-21kworker/u2:111:25:210
81850820,0irq/46-4a10000017559-21rm11:09:540
81850810,0irq/46-4a1000002788-21ssh10:30:180
81850810,0irq/46-4a10000012787-21apt-get09:30:290
59132816,0sleep05919-21ssh09:10:410
81950800,0irq/47-4a10000031782-21ssh11:46:300
81950800,0irq/47-4a1000002627-21munin-run08:50:020
81950800,0irq/47-4a10000020678-21ssh11:18:240
45432806,0sleep04550-21ssh11:58:470
81950790,0irq/47-4a10000030891-21rm10:18:510
81950790,0irq/47-4a10000018506-21munin-run09:45:020
81950790,0irq/47-4a10000013171-21ssh12:19:020
81950790,0irq/47-4a10000010576-21ssh09:23:390
81850790,0irq/46-4a1000007969-21rm10:44:230
81850790,0irq/46-4a1000005926-21ssh10:38:490
81850790,0irq/46-4a10000031757-21kworker/u2:108:40:020
81850790,0irq/46-4a10000020225-21ssh12:35:070
81850790,0irq/46-4a10000017858-21ssh11:11:020
321202790,0chrt28555-21kworker/u2:508:30:020
81950780,0irq/47-4a10000024600-21ssh10:01:590
81950780,0irq/47-4a10000015036-21ssh12:23:030
81950780,0irq/47-4a10000013609-21kworker/u2:409:35:520
81850780,0irq/46-4a10000028311-21apt-config08:05:120
81850780,0irq/46-4a10000025450-21ssh11:30:210
81850780,0irq/46-4a10000022090-21modprobe09:55:020
81850780,0irq/46-4a10000011733-21chrt09:26:460
81850780,0irq/46-4a10000011588-21ssh10:53:320
261122780,0chrt22639-21kworker/u2:610:06:020
171092780,0chrt14497-21kworker/u2:212:27:550
81950770,0irq/47-4a10000027970-21ssh11:36:520
81950770,0irq/47-4a10000024165-21sendmail07:40:010
81950770,0irq/47-4a10000022787-21ssh09:56:430
81950770,0irq/47-4a10000021226-21sendmail07:20:020
81950770,0irq/47-4a1000001513-21ssh10:27:050
81850770,0irq/46-4a10000028040-21cron08:05:010
260832770,0chrt22294-21kworker/u2:207:51:120
184012770,0sleep07842-21kworker/u2:612:30:520
81950760,0irq/47-4a100000332-21ssh10:24:100
81950760,0irq/47-4a100000300792chrt08:17:140
81950760,0irq/47-4a10000029794-21ssh11:41:270
81950760,0irq/47-4a10000026318-21kworker/u2:210:11:260
81950760,0irq/47-4a10000019184-21ssh09:46:390
81950760,0irq/47-4a10000014672-21kworker/u2:611:05:020
81850760,0irq/46-4a1000007592-21seq12:05:460
81850760,0irq/46-4a1000005562-21diskmemload09:15:500
257652760,0chrt25366-21kworker/u2:407:49:340
81950750,0irq/47-4a1000003476-21kworker/u2:412:11:080
81950750,0irq/47-4a10000024924-21runrttasks07:43:380
81950750,0irq/47-4a10000023427-21apt07:35:010
81950750,0irq/47-4a10000019700-21sshd07:12:100
215142750,0chrt20775-21kworker/u2:507:21:230
81950740,0irq/47-4a1000005562-21diskmemload12:03:450
81850740,0irq/46-4a1000003586-21seq08:56:060
268632740,0chrt26851-21kworker/u2:507:56:370
81950730,0irq/47-4a1000002193-21ssh11:53:270
81950720,0irq/47-4a10000025613-21snmpd08:34:350
308512720,0chrt30694-21kworker/u2:408:22:230
13802720,0sleep031757-21kworker/u2:108:41:050
81850710,0irq/46-4a10000022703-21munin-run07:30:010
43762710,0sleep03690-21kworker/u2:609:01:210
292222700,0sleep027618-21kworker/u2:408:11:140
101650,0ktimersoftd/05588-21sh09:10:030
101650,0ktimersoftd/02812-21chrt08:50:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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