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2025-01-15 - 05:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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: 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 rack7slot3s.osadl.org (updated Wed Jan 15, 2025 00:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
71082890,2sleep30-21swapper/300:40:033
277762800,5sleep11400199cyclictest00:22:301
277762800,5sleep11400199cyclictest00:22:301
183182800,4sleep318319-21/usr/sbin/munin20:55:003
246782780,2sleep30-21swapper/323:33:253
131922760,2sleep10-21swapper/121:43:211
1400099718,42cyclictest0-21swapper/020:45:080
1400099707,56cyclictest0-21swapper/021:59:520
1400099681,52cyclictest0-21swapper/023:04:530
14000996736,5cyclictest0-21swapper/000:19:390
1400099672,49cyclictest0-21swapper/000:20:090
1400099672,49cyclictest0-21swapper/000:20:090
1400099661,55cyclictest0-21swapper/023:45:080
139122660,4sleep337-21rcuc/322:31:093
198792650,2sleep00-21swapper/020:59:560
1400099642,49cyclictest0-21swapper/000:39:590
14000996418,26cyclictest25519-21fschecks_count21:15:000
1400099641,46cyclictest11674-21unixbench_singl21:40:080
186062630,3sleep00-21swapper/020:55:050
1400099637,44cyclictest2570-21head23:00:080
1400099632,45cyclictest0-21swapper/000:24:590
14000996317,35cyclictest0-21swapper/023:25:000
14000996317,34cyclictest5060-21sh22:18:550
1400099622,40cyclictest0-21swapper/022:29:390
14000996216,24cyclictest12213-21sh20:39:390
1400099614,41cyclictest9-21ksoftirqd/000:34:390
1400099613,42cyclictest24982-21cut19:44:540
1400099612,42cyclictest26630-21ssh23:35:030
1400099611,44cyclictest0-21swapper/019:29:390
1400099611,43cyclictest13-21rcuc/021:54:390
14000996040,12cyclictest101ktimersoftd/020:20:030
1400099601,42cyclictest0-21swapper/022:44:400
14000995944,5cyclictest0-21swapper/022:48:360
14000995923,6cyclictest8050irq/56-dwc_otg_23:44:390
14000995918,14cyclictest0-21swapper/021:44:500
14000995916,20cyclictest28832-21/usr/sbin/munin19:54:570
1400099591,43cyclictest9075-21fschecks_count20:29:550
14000995914,36cyclictest1292-21runrttasks23:59:150
1400099591,36cyclictest28356-21taskset22:04:560
137032593,14sleep10-21swapper/119:14:291
288632580,2sleep30-21swapper/323:39:123
1400099587,43cyclictest0-21swapper/019:29:550
1400099581,42cyclictest20511-21grep21:54:490
101902580,2sleep30-21swapper/323:58:333
236632570,2sleep10-21swapper/121:09:561
1400099575,38cyclictest9-21ksoftirqd/021:24:490
1400399565,7cyclictest8050irq/56-dwc_otg_22:04:523
1400399564,26cyclictest0-21swapper/323:04:493
1400099569,32cyclictest0-21swapper/021:34:480
1400099569,32cyclictest0-21swapper/021:34:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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