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2025-08-21 - 21:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 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 50 highest latencies:
System rack1slot2s.osadl.org (updated Thu Aug 21, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350560,0irq/25-eth10-21swapper/306:40:163
2902724231,0sleep20-21swapper/206:42:572
2884524140,0sleep10-21swapper/106:40:481
2265722622,0sleep00-21swapper/006:38:110
339960,0migration/39998-21munin-node09:33:213
339960,0migration/3636-21munin-node07:58:203
339960,0migration/3612-21sh11:50:223
339960,0migration/36083-21taskset09:48:473
339960,0migration/326887-21kthreadcore10:23:233
339960,0migration/324328-21munin-node11:03:213
339960,0migration/318844-21sh08:58:063
339960,0migration/316340-21sh11:58:453
339960,0migration/31553-21sh09:06:593
339960,0migration/314262-21sh09:55:283
339960,0migration/313936-21sh10:18:103
291099960,0cyclictest27311-21diskmemload11:19:452
291099960,0cyclictest27088-21fschecks_time08:18:182
291099960,0cyclictest0-21swapper/210:04:052
291069960,0cyclictest0-21swapper/011:46:210
291069960,0cyclictest0-21swapper/009:59:280
291069960,0cyclictest0-21swapper/008:23:270
28415060,0irq/27-eth0-tx-17371-21ssh09:16:452
28415060,0irq/27-eth0-tx-0-21swapper/212:05:012
28415060,0irq/27-eth0-tx-0-21swapper/211:49:492
28415060,0irq/27-eth0-tx-0-21swapper/211:39:222
28415060,0irq/27-eth0-tx-0-21swapper/211:33:062
28415060,0irq/27-eth0-tx-0-21swapper/210:43:572
28415060,0irq/27-eth0-tx-0-21swapper/210:36:072
28415060,0irq/27-eth0-tx-0-21swapper/210:36:072
28415060,0irq/27-eth0-tx-0-21swapper/210:13:332
28415060,0irq/27-eth0-tx-0-21swapper/209:54:522
28415060,0irq/27-eth0-tx-0-21swapper/209:49:462
28415060,0irq/27-eth0-tx-0-21swapper/209:41:422
28415060,0irq/27-eth0-tx-0-21swapper/209:11:202
28415060,0irq/27-eth0-tx-0-21swapper/209:06:482
28415060,0irq/27-eth0-tx-0-21swapper/208:48:042
28415060,0irq/27-eth0-tx-0-21swapper/208:46:092
28405060,0irq/26-eth0-rx-24024-21grep07:48:233
28405060,0irq/26-eth0-rx-23775-21gltestperf10:03:193
249960,0watchdog/24366-21grep11:53:212
249960,0watchdog/211000-21kthreadcore08:03:212
249960,0watchdog/21044-21ssh11:31:172
249960,0watchdog/20-21swapper/209:18:212
249960,0watchdog/20-21swapper/208:55:372
8225050,0irq/24-0000:00:25353-21perf07:53:032
8225050,0irq/24-0000:00:10109-21idleruntime-cro06:53:032
4150,0ktimersoftd/00-21swapper/010:38:340
4150,0ktimersoftd/00-21swapper/010:21:130
339950,0migration/37457-21kthreadcore07:38:213
339950,0migration/37155-21kthreadcore10:33:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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