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2025-05-05 - 01:27

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 792 highest latencies:
System rack9slot8s.osadl.org (updated Sun May 04, 2025 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501810,0irq/47-4a10000025795-21runrttasks07:07:580
81850790,0irq/46-4a10000029538-21ssh12:36:550
81850770,0irq/46-4a1000006100-21ssh10:20:020
81850770,0irq/46-4a10000030773-21ssh11:24:120
81850770,0irq/46-4a10000029819-21rm09:56:150
81850760,0irq/46-4a10000027799-21ssh09:50:560
81850760,0irq/46-4a10000016240-21rm09:20:260
81850750,0irq/46-4a1000003274-21ssh10:12:010
81850750,0irq/46-4a1000002280-21runrttasks11:40:300
81850750,0irq/46-4a10000022064-21rm09:35:280
81850750,0irq/46-4a10000018373-21rm09:25:440
81850740,0irq/46-4a1000007412-21chrt10:23:150
81850740,0irq/46-4a1000003891-21runrttasks11:37:070
81850740,0irq/46-4a10000032548-21rm11:28:220
81850740,0irq/46-4a10000026891-21runrttasks07:14:100
81850740,0irq/46-4a10000017053-21rm10:49:190
81850740,0irq/46-4a10000014568-21ssh10:42:440
81850740,0irq/46-4a10000014480-21ssh12:01:500
81850740,0irq/46-4a10000012312-21diskmemload11:00:170
81850740,0irq/46-4a10000012312-21diskmemload10:04:590
95222730,0chrt5280-21kworker/u2:008:50:230
81850730,0irq/46-4a1000009970-21modprobe10:30:000
81850730,0irq/46-4a10000032175-21kworker/u2:407:50:070
81850730,0irq/46-4a10000029476-21runrttasks07:28:440
81850730,0irq/46-4a10000027920-21rm12:33:100
81850730,0irq/46-4a10000026465-21apt-get12:30:060
81850730,0irq/46-4a10000024550-21ssh09:42:040
81850730,0irq/46-4a1000002280-21runrttasks09:19:200
81850730,0irq/46-4a10000022578-21rm12:20:480
81850730,0irq/46-4a10000021777-21rm12:19:080
243792730,0sleep021277-21kworker/u2:511:07:550
81850720,0irq/46-4a10000031983-21kworker/u2:411:53:200
81850720,0irq/46-4a10000020644-21seq10:58:190
81850720,0irq/46-4a10000018080-21modprobe12:10:120
81850720,0irq/46-4a10000012312-21diskmemload11:49:450
81850720,0irq/46-4a10000011887-21kworker/u2:109:10:350
176642720,0chrt16253-21kworker/u2:010:50:400
12862720,0chrt25945-21kworker/u2:311:31:020
81850710,0irq/46-4a1000007879-21kworker/u2:408:50:010
81850710,0irq/46-4a1000006722-21kworker/u2:310:33:500
81850710,0irq/46-4a10000027555-21runrttasks11:16:080
309262710,0sleep029923-21kworker/u2:307:38:420
8402700,0sleep018519-21kworker/u2:510:05:170
81850700,0irq/46-4a1000001784-21kworker/u2:408:15:040
68092700,0sleep06764-21kworker/u2:208:32:120
260352700,0chrt16834-21kworker/u2:109:46:060
81850690,0irq/46-4a10000023850-21kworker/u2:011:10:180
81850690,0irq/46-4a10000016545-21ssh12:06:400
81850690,0irq/46-4a10000010669-21kworker/u2:210:37:040
62842690,0chrt6020-21kworker/u2:108:28:530
27092690,0sleep01784-21kworker/u2:408:05:170
25012690,0sleep02075-21kworker/u2:508:04:360
117332690,0sleep010374-21kworker/u2:009:05:230
81850670,0irq/46-4a1000002054-21cron09:31:010
81850670,0irq/46-4a10000012218-21kworker/u2:211:56:410
81850670,0irq/46-4a10000010374-21kworker/u2:009:05:010
81850660,0irq/46-4a1000002828-1kworker/u3:208:21:370
33862650,0sleep02827-21kworker/u2:208:10:040
81850640,0irq/46-4a1000006764-21kworker/u2:208:41:030
81850620,0irq/46-4a10000026628-1kworker/u3:507:17:050
26096995948,0cyclictest101ktimersoftd/008:40:010
81850570,0irq/46-4a1000000-21swapper07:23:450
26096995544,0cyclictest81850irq/46-4a10000008:00:020
26096995028,0cyclictest30019-21sshd07:32:140
26096994940,0cyclictest101ktimersoftd/008:56:000
26096994730,0cyclictest32586-21munin-run07:50:030
26096994630,0cyclictest31622-21sshd07:43:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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