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2025-09-18 - 14:35

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 376 highest latencies:
System rack9slot8s.osadl.org (updated Thu Sep 18, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501980,0irq/46-4a10000019310-21kworker/0:119:06:410
81950840,0irq/47-4a1000005834-21kworker/u2:221:14:580
81950780,0irq/47-4a10000015173-21snmpd21:52:260
81950760,0irq/47-4a1000009238-21ssh22:24:400
81950760,0irq/47-4a10000029183-21cron20:04:520
81950760,0irq/47-4a10000015184-21lldpd22:31:430
81950750,0irq/47-4a10000022257-21ssh00:00:580
81950750,0irq/47-4a10000017350-21ssh22:41:480
134732757,0sleep013479-21diskmemload21:24:210
81950740,0irq/47-4a100000417-21munin-run23:14:590
81950740,0irq/47-4a10000027830-21ssh00:12:540
81950740,0irq/47-4a10000026187-21ssh23:00:360
81950740,0irq/47-4a10000019478-21ssh22:46:210
81950730,0irq/47-4a1000008414-1kworker/u3:423:45:000
81950730,0irq/47-4a100000799-1kworker/u3:122:10:460
81950730,0irq/47-4a10000032415-21munin-run22:04:570
81950730,0irq/47-4a10000017622-21kworker/u2:300:05:050
81950730,0irq/47-4a10000010110-21ssh23:35:160
81950720,0irq/47-4a1000009716-21rm21:16:190
81950720,0irq/47-4a1000008412-21kworker/u2:523:47:500
81950720,0irq/47-4a1000004590-21kworker/u2:321:44:220
81850720,0irq/46-4a10000028754-21kworker/u2:723:16:030
101720,0ktimersoftd/06337-21ssh00:36:000
81950710,0irq/47-4a1000009587-21ssh22:25:130
81850710,0irq/46-4a10000018394-21kworker/u2:522:50:130
81850710,0irq/46-4a1000000-21swapper00:25:480
101710,0ktimersoftd/028093-21ssh21:55:310
81950700,0irq/47-4a1000005063-21ssh22:15:340
81850700,0irq/46-4a10000024402-21kworker/u2:222:59:100
101700,0ktimersoftd/03698-21ssh00:30:230
101700,0ktimersoftd/03606-21ssh23:21:320
101700,0ktimersoftd/032360-21ssh00:22:270
101700,0ktimersoftd/027633-21chrt19:54:240
101700,0ktimersoftd/020654-21seq19:10:480
101700,0ktimersoftd/020120-21ssh23:56:320
101700,0ktimersoftd/01671-21ssh22:08:330
81950690,0irq/47-4a10000025769-21kworker/u2:323:28:280
81950690,0irq/47-4a10000024300-21ssh21:47:270
81950690,0irq/47-4a10000017030-21kworker/u2:221:38:000
81850690,0irq/46-4a1000005992-21kworker/u2:123:30:220
101690,0ktimersoftd/032584-21seq20:27:260
101690,0ktimersoftd/028861-21ssh23:06:220
101690,0ktimersoftd/024975-21seq19:35:540
101690,0ktimersoftd/018819-21ssh23:53:520
81850680,0irq/46-4a10000028018-21kworker/u2:120:30:240
81850680,0irq/46-4a10000019310-21kworker/0:119:15:430
101680,0ktimersoftd/014473-21ssh21:26:220
81850670,0irq/46-4a10000014643-1kworker/u3:021:31:150
81850670,0irq/46-4a1000000-21swapper00:17:250
101660,0ktimersoftd/05207-21wc20:59:570
101660,0ktimersoftd/023882-21chrt19:28:540
101660,0ktimersoftd/014596-21ssh22:35:580
81950650,0irq/47-4a10000023632-1kworker/u3:119:41:120
48142659,0sleep015173-21snmpd20:57:500
101640,0ktimersoftd/02337-21runrttasks20:40:330
81950630,0irq/47-4a10000025772-1kworker/u3:219:46:190
101630,0ktimersoftd/031944-21chrt20:23:090
101630,0ktimersoftd/024253-21kworker/u2:219:34:310
81850620,0irq/46-4a1000000-21swapper20:14:520
81950610,0irq/47-4a10000014901-21cron21:07:530
101560,0ktimersoftd/015201-21runrttasks20:51:550
101530,0ktimersoftd/015173-21snmpd20:15:160
101530,0ktimersoftd/00-21swapper20:05:550
101520,0ktimersoftd/00-21swapper20:35:290
20448994918,0cyclictest28425-21cron19:59:520
101480,0ktimersoftd/00-21swapper19:23:580
20448994530,0cyclictest20446-21cyclictest20:46:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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