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2026-06-20 - 10:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Sat Jun 20, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
146441399935,45cyclictest1501599-21/usr/sbin/munin22:45:191
146441699867,22cyclictest1507386-21apt-get23:20:022
146441299761,64cyclictest0-21swapper/019:45:100
146441699757,21cyclictest1493821-21/usr/sbin/munin22:00:172
1464412997232,37cyclictest167350irq/118-8000000.ethernet-tx021:00:210
1464412997232,35cyclictest0-21swapper/022:05:010
1464412997231,9cyclictest0-21swapper/023:05:280
1464412997137,4cyclictest167350irq/118-8000000.ethernet-tx020:35:280
1464412996936,4cyclictest167350irq/118-8000000.ethernet-tx023:25:240
1464413996357,3cyclictest1510943-21apt-get23:40:011
1464413996318,35cyclictest0-21swapper/120:10:011
1464416996251,6cyclictest30-21rcuc/222:30:022
1464416995950,4cyclictest311ktimers/221:30:002
146441699581,23cyclictest0-21swapper/219:50:012
1464413995814,37cyclictest1476399-21ptp4l20:15:281
1464412995547,5cyclictest167350irq/118-8000000.ethernet-tx000:00:000
1464412995446,4cyclictest0-21swapper/019:40:200
1464412995446,4cyclictest0-21swapper/019:40:190
146441299543,6cyclictest12-21ksoftirqd/023:00:150
1464416995343,5cyclictest1472317-21munin-plugin-st19:55:012
1464413995041,5cyclictest1499702-21munin-plugin-st22:35:001
1464413995030,11cyclictest1493824-21apt-get22:00:151
1464413995024,13cyclictest0-21swapper/122:05:151
1464412995031,15cyclictest131ktimers/019:55:130
146441299499,16cyclictest0-21swapper/000:25:020
1464412994939,7cyclictest1487591-21grep21:20:270
1464412994937,9cyclictest0-21swapper/021:50:000
1464416994830,12cyclictest0-21swapper/221:20:012
146441399484,30cyclictest0-21swapper/123:35:011
1464413994831,11cyclictest1505815-21apt-get23:10:131
1464413994831,10cyclictest0-21swapper/100:34:591
1464413994830,12cyclictest1487911-21apt-get21:25:141
1464413994829,14cyclictest0-21swapper/121:00:111
1464413994828,15cyclictest0-21swapper/120:35:121
146441299485,8cyclictest1510180-21rm23:35:010
146441299482,4cyclictest1474749-21/usr/sbin/munin20:05:320
146441299481,17cyclictest0-21swapper/019:35:020
1464413994730,10cyclictest1464634-21apt-get19:10:151
1464413994720,15cyclictest231ktimers/100:10:161
1464412994740,4cyclictest20850irq/208-8000000.ethernet21:55:000
1464412994739,5cyclictest0-21swapper/000:15:200
1464416994632,10cyclictest1473168-21sendmail20:00:012
146441699463,20cyclictest30-21rcuc/221:05:022
1464413994629,11cyclictest0-21swapper/122:40:111
1464413994629,11cyclictest0-21swapper/122:40:111
1464413994628,13cyclictest0-21swapper/120:45:141
1464413994625,11cyclictest0-21swapper/120:55:211
1464413994622,15cyclictest1482317-21/usr/sbin/munin20:50:251
146441399461,26cyclictest0-21swapper/123:10:011
1464412994641,2cyclictest0-21swapper/023:50:150
1464412994639,4cyclictest1474106-21munin-plugin-st20:05:000
1464412994638,4cyclictest167350irq/118-8000000.ethernet-tx021:35:250
1464416994537,4cyclictest1521175-21latency_hist00:40:002
1464416994537,4cyclictest1521175-21latency_hist00:40:002
1464413994530,11cyclictest1468301-21apt-get19:30:151
1464413994529,9cyclictest1491290-21apt-get21:45:151
1464413994528,11cyclictest0-21swapper/121:50:151
1464413994524,14cyclictest1521143-21/usr/sbin/munin00:35:291
1464413994524,14cyclictest1521143-21/usr/sbin/munin00:35:291
1464413994523,15cyclictest0-21swapper/120:20:291
1464413994523,14cyclictest1489802-21/usr/sbin/munin21:35:201
1464413994523,13cyclictest1517497-21/usr/sbin/munin00:15:261
1464413994523,13cyclictest1478023-21/usr/sbin/munin20:25:261
1464413994523,13cyclictest1478023-21/usr/sbin/munin20:25:251
1464413994523,11cyclictest1514725-21grep00:00:191
1464413994521,11cyclictest0-21swapper/119:20:141
1464413994516,14cyclictest0-21swapper/123:55:121
1464412994536,4cyclictest1660-21snmpd20:40:180
146441299451,41cyclictest1486701-21sed21:15:290
1464416994431,8cyclictest1492657-21grep21:50:292
1464416994412,11cyclictest1508532-21/usr/sbin/munin23:25:202
1464413994432,8cyclictest1497293-21munin-node22:20:101
1464413994429,7cyclictest0-21swapper/120:00:301
1464413994427,13cyclictest0-21swapper/123:40:141
1464413994426,9cyclictest1475737-21grep20:10:281
1464413994424,14cyclictest0-21swapper/119:40:121
1464413994424,14cyclictest0-21swapper/119:40:121
1464412994436,5cyclictest1466406-21munin-plugin-st19:20:000
146441299442,40cyclictest0-21swapper/020:10:280
146441299442,36cyclictest1468062-21grep19:25:300
146441299441,4cyclictest0-21swapper/022:00:000
1464416994332,7cyclictest1512672-21grep23:45:292
146441699431,4cyclictest0-21swapper/222:00:012
1464413994333,5cyclictest1490449-21apt-get21:40:141
1464413994331,6cyclictest1508249-21grep23:20:291
1464412994334,5cyclictest0-21swapper/000:05:120
1464412994334,5cyclictest0-21swapper/000:05:120
146441299432,39cyclictest0-21swapper/023:40:050
146441299431,10cyclictest1503870-21grep22:55:290
1464413994233,5cyclictest1486490-21/usr/sbin/munin21:15:281
1464413994232,5cyclictest1488820-21/usr/sbin/munin21:30:161
1464413994231,7cyclictest1515949-21/usr/sbin/munin00:05:291
1464413994231,7cyclictest1515949-21/usr/sbin/munin00:05:291
1464413994229,7cyclictest1502436-21/usr/sbin/munin22:50:281
1464413994228,10cyclictest1504133-21/usr/sbin/munin23:00:101
1464413994224,11cyclictest1484565-21/usr/sbin/munin21:05:201
1464413994223,13cyclictest0-21swapper/122:55:141
1464413994218,15cyclictest1498261-21/usr/sbin/munin22:25:191
1464412994230,8cyclictest1476640-21sendmail20:20:010
1464412994229,9cyclictest0-21swapper/019:55:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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