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2025-04-05 - 23:01

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 Sat Apr 05, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350450,0irq/25-eth10-21swapper/306:46:573
3210324132,0sleep10-21swapper/106:47:051
3190323824,0sleep00-21swapper/006:44:440
3183722920,0sleep20-21swapper/206:43:572
32266991010,0cyclictest29571-21awk11:48:201
339960,0migration/33620-21sh10:12:343
339960,0migration/329242-21munin-node08:23:333
322659965,0cyclictest7833-21ps06:53:270
28415060,0irq/27-eth0-tx-16038-21munin-node07:53:310
28415060,0irq/27-eth0-tx-0-21swapper/211:43:552
28415060,0irq/27-eth0-tx-0-21swapper/211:37:222
28415060,0irq/27-eth0-tx-0-21swapper/211:31:492
28415060,0irq/27-eth0-tx-0-21swapper/211:27:202
28415060,0irq/27-eth0-tx-0-21swapper/211:22:012
28415060,0irq/27-eth0-tx-0-21swapper/210:56:592
28415060,0irq/27-eth0-tx-0-21swapper/210:36:532
28415060,0irq/27-eth0-tx-0-21swapper/210:25:372
28415060,0irq/27-eth0-tx-0-21swapper/210:19:192
28415060,0irq/27-eth0-tx-0-21swapper/210:05:512
28415060,0irq/27-eth0-tx-0-21swapper/209:59:052
28415060,0irq/27-eth0-tx-0-21swapper/209:34:322
28415060,0irq/27-eth0-tx-0-21swapper/209:28:192
28415060,0irq/27-eth0-tx-0-21swapper/209:26:402
28415060,0irq/27-eth0-tx-0-21swapper/209:11:412
28415060,0irq/27-eth0-tx-0-21swapper/208:59:432
28415060,0irq/27-eth0-tx-0-21swapper/007:26:100
28415060,0irq/27-eth0-tx-0-21swapper/007:11:300
28405060,0irq/26-eth0-rx-32042-21ssh09:14:133
249960,0watchdog/20-21swapper/209:47:202
249960,0watchdog/20-21swapper/207:58:362
149960,0migration/06575-21sh11:04:120
149960,0migration/027948-21sh12:08:230
149960,0migration/017485-21kthreadcore10:48:210
4150,0ktimersoftd/00-21swapper/010:11:320
339950,0migration/39178-21kthreadcore08:33:283
339950,0migration/38966-21mdstat08:08:313
339950,0migration/37779-21aten_r1power_en07:18:223
339950,0migration/34538-21runrttasks12:13:463
339950,0migration/331074-21kthreadcore08:03:283
339950,0migration/329760-21taskset10:56:373
339950,0migration/327348-21munin-node07:33:323
339950,0migration/320955-21kthreadcore09:58:273
339950,0migration/32084-21latency_hist11:28:093
339950,0migration/31883-21kthreadcore10:58:283
339950,0migration/318347-21fschecks_time09:08:193
339950,0migration/317766-21kthreadcore10:48:213
339950,0migration/317479-21kthreadcore11:58:283
339950,0migration/315750-21kthreadcore06:58:303
339950,0migration/313893-21kthreadcore08:13:273
339950,0migration/311945-21fschecks_time09:53:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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