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2025-02-19 - 00:55

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 100 highest latencies:
System rack9slot8s.osadl.org (updated Tue Feb 18, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501550,0irq/47-4a1000002284-21lldpd07:06:360
81950880,0irq/47-4a10000031526-21ssh09:23:520
81950870,0irq/47-4a1000004873-21ssh11:10:200
81950870,0irq/47-4a10000026551-21ssh12:04:310
81950870,0irq/47-4a10000013171-21/usr/sbin/munin07:40:030
81950860,0irq/47-4a1000008057-21ssh12:38:100
81950860,0irq/47-4a10000018836-21ssh10:17:380
81950860,0irq/47-4a1000001586-21rm09:30:270
81950860,0irq/47-4a10000011695-21munin-run07:30:030
81950850,0irq/47-4a10000032646-21ssh12:19:220
81950850,0irq/47-4a10000030218-21rm12:13:260
81950850,0irq/47-4a10000026900-21diskmemload09:14:400
81950850,0irq/47-4a10000023694-21ssh11:57:240
81950850,0irq/47-4a10000012331-21rm11:29:450
81950840,0irq/47-4a1000005494-21rm12:31:540
81950840,0irq/47-4a1000004490-21ssh11:09:560
81950840,0irq/47-4a10000028990-21rm09:15:500
81950840,0irq/47-4a10000026900-21diskmemload09:29:450
81950840,0irq/47-4a10000023586-21ssh10:31:150
81950840,0irq/47-4a10000020684-21ssh11:50:060
81950840,0irq/47-4a10000020253-21kworker/u2:610:27:270
81950840,0irq/47-4a1000001830-21ssh11:02:370
81950840,0irq/47-4a10000018062-21kworker/u2:108:45:060
81950840,0irq/47-4a1000001792-21ssh12:23:060
81950840,0irq/47-4a10000017286-21ssh11:42:070
277882847,0sleep027790-21ssh10:43:460
81950830,0irq/47-4a1000007861-21kworker/u2:007:15:000
81950830,0irq/47-4a1000007606-21ssh09:46:400
81950830,0irq/47-4a10000030805-21rm10:52:080
81950830,0irq/47-4a10000026900-21diskmemload10:14:020
81950830,0irq/47-4a10000026898-21ssh12:05:070
81950830,0irq/47-4a10000024834-21runrttasks08:55:310
81950830,0irq/47-4a10000020445-21ssh11:49:390
81950830,0irq/47-4a10000020253-21kworker/u2:611:30:320
81950830,0irq/47-4a10000011253-21ssh09:56:500
81950830,0irq/47-4a10000010158-21ssh11:23:590
81950820,0irq/47-4a1000007343-21kworker/u2:211:17:200
81950820,0irq/47-4a1000003990-21ssh09:36:560
81950820,0irq/47-4a10000026900-21diskmemload09:43:320
81950820,0irq/47-4a10000025466-21kworker/u2:412:25:050
81950820,0irq/47-4a10000025056-21ssh10:35:390
81950820,0irq/47-4a10000012897-21ssh10:01:220
81950820,0irq/47-4a10000010051-21ssh09:53:390
81850820,0irq/46-4a100000201482sleep010:20:530
81950810,0irq/47-4a10000032581-21ssh10:57:200
81950810,0irq/47-4a10000028188-21latency_hist10:45:040
81950810,0irq/47-4a10000021513-21latency_hist08:35:050
81950810,0irq/47-4a10000015243-21ssh11:37:100
81950810,0irq/47-4a10000010865-21runrttasks07:24:240
81950790,0irq/47-4a10000015845-21sshd07:56:200
81950790,0irq/47-4a10000014229-1kworker/u3:207:50:040
81950790,0irq/47-4a10000013481-21kworker/u2:607:50:010
81950790,0irq/47-4a10000013079-21kworker/u2:510:05:190
255792790,0sleep024933-21kworker/u2:109:00:240
227352790,0sleep021094-21kworker/u2:208:42:580
81850780,0irq/46-4a1000009395-21ntp_states07:15:120
192292780,0sleep018815-21kworker/u2:508:19:420
121422780,0chrt7861-21kworker/u2:007:32:520
264922770,0chrt22994-21kworker/u2:009:06:510
176982770,0sleep07861-21kworker/u2:008:09:180
133592770,0sleep011208-21kworker/u2:107:40:350
81850740,0irq/46-4a10000020767-21modprobe08:30:010
214582730,0sleep021094-21kworker/u2:208:34:440
195802730,0chrt18815-21kworker/u2:508:21:210
81950720,0irq/47-4a10000021842-21kworker/u2:608:55:010
166422720,0chrt7861-21kworker/u2:008:01:370
101680,0ktimersoftd/018054-21chrt08:11:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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