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2025-07-12 - 11:33

OSADL QA Farm on Real-time of Mainline Linux

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

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 rack7slot7s.osadl.org (updated Sat Jul 12, 2025 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1268429782,10sleep10-21swapper/119:08:561
1246829582,8sleep30-21swapper/319:06:093
1261129265,8sleep00-21swapper/019:07:590
1252428070,6sleep20-21swapper/219:06:522
275232700,0sleep00-21swapper/019:40:000
154662540,0sleep10-21swapper/121:39:171
12845993332,1cyclictest0-21swapper/123:42:491
12845992927,1cyclictest0-21swapper/121:48:291
12854992726,1cyclictest0-21swapper/323:04:093
12845992726,1cyclictest0-21swapper/123:14:091
12845992523,1cyclictest0-21swapper/123:27:491
1285499242,21cyclictest25056-21latency_hist19:35:003
12845992322,1cyclictest0-21swapper/123:38:291
1285499224,16cyclictest19862-21grep22:50:173
12845992120,1cyclictest0-21swapper/123:30:491
1284099210,1cyclictest0-21swapper/022:37:510
1284099210,1cyclictest0-21swapper/022:37:510
1284099202,14cyclictest20347-21/usr/sbin/munin21:20:250
1284099200,19cyclictest0-21swapper/000:36:580
1284099200,0cyclictest0-21swapper/021:42:110
12854991917,1cyclictest17603-21ssh23:10:443
1285099191,11cyclictest0-21swapper/222:25:122
1284599196,3cyclictest224-21systemd-journal21:20:011
1284599190,2cyclictest0-21swapper/100:27:561
12850991818,0cyclictest0-21swapper/221:48:152
1285099180,18cyclictest0-21swapper/223:12:532
12840991814,3cyclictest13-21ksoftirqd/023:06:470
1285499170,13cyclictest32387-21apache_accesses00:35:133
1285099172,6cyclictest0-21swapper/223:30:002
1285099170,1cyclictest0-21swapper/221:42:562
12840991713,3cyclictest26727-21ssh22:09:540
77192160,0sleep10-21swapper/121:55:321
1285499169,6cyclictest9162-21cron20:10:003
1285499160,15cyclictest0-21swapper/322:55:143
12850991613,3cyclictest0-21swapper/223:30:382
1285099160,16cyclictest0-21swapper/221:13:142
1285099160,12cyclictest0-21swapper/222:30:082
12840991612,3cyclictest25312sleep023:23:400
1284099160,15cyclictest0-21swapper/022:29:320
1285099151,1cyclictest0-21swapper/222:07:412
1284599150,4cyclictest0-21swapper/121:20:211
1284099153,6cyclictest636-21grep21:00:000
12840991515,0cyclictest0-21swapper/021:13:380
112162150,1sleep00-21swapper/021:35:290
1285499141,2cyclictest0-21swapper/323:44:123
1285499140,13cyclictest0-21swapper/321:38:293
12850991414,0cyclictest0-21swapper/220:35:142
12850991412,1cyclictest4548-21ssh00:10:292
12850991412,1cyclictest32-21ksoftirqd/221:37:022
12850991411,2cyclictest37850irq/131-snd_hda22:21:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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