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2025-06-16 - 20:11

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 all highest latencies:
System rack9slot8s.osadl.org (updated Mon Jun 16, 2025 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501160,0irq/47-4a10000025543-21sshd07:06:220
81850900,0irq/46-4a10000013615-21chrt10:41:050
81850850,0irq/46-4a10000024231-21ssh11:11:320
81850850,0irq/46-4a10000023273-21sendmail09:39:550
81950830,0irq/47-4a10000012361-21diskmemload12:23:550
81850830,0irq/46-4a1000006788-21seq10:22:280
81850830,0irq/46-4a10000012361-21diskmemload11:46:270
90062820,0sleep08996-21kworker/u2:208:46:480
81950820,0irq/47-4a1000006790-21kworker/u2:512:00:000
81950820,0irq/47-4a10000020299-21ssh09:31:270
81950810,0irq/47-4a10000027657-21ssh09:51:210
81950810,0irq/47-4a1000001349-21kworker/u2:107:59:510
81850810,0irq/46-4a10000030045-21seq07:32:400
81850810,0irq/46-4a10000018506-21munin-plugin-st12:20:020
81950800,0irq/47-4a10000032092-21ssh11:33:340
81950800,0irq/47-4a10000029418-21ssh09:56:140
81950800,0irq/47-4a10000027869-21ssh11:22:000
81950800,0irq/47-4a10000019663-21ssh09:29:580
81950800,0irq/47-4a10000010869-21munin-run08:59:550
81850800,0irq/46-4a1000009411-21munin-run10:29:570
81850800,0irq/46-4a10000023756-21rm12:31:580
81950790,0irq/47-4a10000031750-21ssh10:02:460
81950790,0irq/47-4a10000030094-21rm11:28:210
81950790,0irq/47-4a10000023953-21ssh09:41:300
81950790,0irq/47-4a10000015058-21ssh10:45:030
81950790,0irq/47-4a10000012214-21sshd10:37:320
81850790,0irq/46-4a100000603-21runrttasks10:06:200
81850790,0irq/46-4a10000020345-21apt10:59:580
81850790,0irq/46-4a10000012763-21ssh12:05:270
81850790,0irq/46-4a10000012361-21diskmemload11:36:260
32182790,0chrt2129-21kworker/u2:708:09:350
81950780,0irq/47-4a1000008295-21apt11:55:010
81950780,0irq/47-4a1000004756-21plymouth08:19:500
81950780,0irq/47-4a10000032009-21munin-run07:44:500
81950780,0irq/47-4a10000021193-21ssh12:26:010
81950780,0irq/47-4a10000017782-21ssh10:52:250
81950780,0irq/47-4a10000011689-21rm12:02:500
81850780,0irq/46-4a1000007910-21/usr/sbin/munin08:39:540
81850780,0irq/46-4a10000030573-21gpgv07:35:010
81850780,0irq/46-4a10000026155-21ssh12:37:350
81850780,0irq/46-4a10000016928-21rm09:22:250
81850780,0irq/46-4a10000010494-21rm10:32:410
259222780,0chrt25753-21kworker/u2:211:16:500
81950770,0irq/47-4a10000026712-21rm09:49:070
81950770,0irq/47-4a1000002373-21rm11:40:120
81950770,0irq/47-4a10000022805-21ssh11:07:210
81850770,0irq/46-4a1000004002-21munin-run08:14:510
81850770,0irq/46-4a1000002767-21chrt10:12:020
81850770,0irq/46-4a10000011618-21latency_hist09:04:560
81950760,0irq/47-4a1000004954-21rm08:19:590
81950760,0irq/47-4a10000020059-21kworker/u2:507:15:030
81950760,0irq/47-4a10000015293-21ssh12:12:040
81850760,0irq/46-4a10000026931-21munin-run07:14:500
81850760,0irq/46-4a10000015735-21sshd09:19:290
81850760,0irq/46-4a100000115342sleep009:04:200
294372760,0sleep029203-21kworker/u2:107:28:430
283722760,0chrt27672-21kworker/u2:707:20:590
81950750,0irq/47-4a1000005107-21ssh10:18:050
81850750,0irq/46-4a100000478-21sshd07:50:350
81850750,0irq/46-4a10000021165-21runrttasks11:02:280
22892750,0chrt1347-21kworker/u2:008:02:570
81950740,0irq/47-4a10000012344-21kworker/u2:309:12:210
81850740,0irq/46-4a1000006414-21cron08:29:510
81222740,0sleep06720-21kworker/u2:008:40:350
81950730,0irq/47-4a1000009815-21sshd08:52:280
81950710,0irq/47-4a10000032427-21sshd07:47:230
81950570,0irq/47-4a10000023223-21cron08:31:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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