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2026-08-07 - 06:11

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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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 Fri Aug 07, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1849098991478,17cyclictest1868181-21apt-get21:00:022
1849094998217,58cyclictest1876210-21/usr/sbin/munin21:45:210
184909899806,16cyclictest1851880-21apt-get19:25:012
1849098997729,39cyclictest0-21swapper/222:05:292
1849097997771,3cyclictest1871868-21/usr/sbin/munin21:20:231
1849094997519,53cyclictest1855349-21munin-plugin-st19:45:000
1849098997325,41cyclictest0-21swapper/200:05:292
1849097997157,10cyclictest0-21swapper/119:30:011
1849098997026,39cyclictest0-21swapper/221:20:332
1849097996961,6cyclictest231ktimers/100:20:011
1849094996934,31cyclictest20650irq/252-8000000.ethernet19:25:210
1849094996833,26cyclictest20650irq/252-8000000.ethernet19:30:140
1849094996832,33cyclictest1878623-21/usr/sbin/munin22:00:150
1849094996832,33cyclictest1878623-21/usr/sbin/munin22:00:150
1849094996831,34cyclictest1857946-21cron20:00:010
1849094996829,32cyclictest1865024-21/usr/sbin/munin20:40:140
1849098996625,37cyclictest0-21swapper/223:20:302
1849094996633,29cyclictest0-21swapper/000:05:000
1849094996633,29cyclictest0-21swapper/000:05:000
184909499661,3cyclictest0-21swapper/020:35:010
1849094996536,25cyclictest20650irq/252-8000000.ethernet23:25:170
1849097996412,13cyclictest1904134-21/usr/sbin/munin00:30:201
1849094996435,25cyclictest20650irq/252-8000000.ethernet23:00:230
1849094996435,24cyclictest20650irq/252-8000000.ethernet21:30:170
1849094996337,21cyclictest1854405-21unixbench_multi19:35:280
1849094996335,25cyclictest20650irq/252-8000000.ethernet22:30:260
184909499632,5cyclictest1849726-21mailstats19:10:270
184909499632,56cyclictest1891060-21grep23:10:280
184909499632,56cyclictest1891060-21grep23:10:280
1849094996319,40cyclictest0-21swapper/021:00:000
1849098996223,31cyclictest0-21swapper/223:50:322
1849094996236,21cyclictest20650irq/252-8000000.ethernet22:20:240
1849094996234,24cyclictest0-21swapper/021:20:000
1849098996128,29cyclictest1660-21snmpd20:40:142
1849098996118,5cyclictest0-21swapper/200:00:302
1849098996118,5cyclictest0-21swapper/200:00:302
1849098996110,9cyclictest0-21swapper/219:45:042
1849094996135,22cyclictest20650irq/252-8000000.ethernet22:10:170
184909499611,5cyclictest1900422-21/usr/sbin/munin00:05:290
1849094996114,42cyclictest0-21swapper/023:30:280
184909499611,2cyclictest0-21swapper/000:40:010
1849098996023,7cyclictest1858802-21sshd20:04:322
1849098996021,32cyclictest0-21swapper/223:40:292
1849094996040,16cyclictest167350irq/118-8000000.ethernet-tx019:15:260
1849094996040,16cyclictest167350irq/118-8000000.ethernet-tx019:15:260
1849094996028,28cyclictest1902959-21/usr/sbin/munin00:20:300
1849094996025,32cyclictest20850irq/208-8000000.ethernet21:10:170
1849094996025,32cyclictest20850irq/208-8000000.ethernet21:10:170
184909499602,3cyclictest1871917-21/usr/sbin/munin21:20:200
1849098995925,29cyclictest0-21swapper/219:40:282
1849098995923,28cyclictest0-21swapper/220:10:362
1849098995914,7cyclictest0-21swapper/222:25:222
1849094995935,21cyclictest20650irq/252-8000000.ethernet20:54:590
1849094995935,20cyclictest20650irq/252-8000000.ethernet19:50:210
1849094995929,26cyclictest1887781-21latency_hist22:55:010
1849098995830,24cyclictest0-21swapper/220:35:312
1849098995824,26cyclictest0-21swapper/200:35:212
1849098995823,28cyclictest0-21swapper/223:05:292
1849098995818,5cyclictest0-21swapper/220:05:202
1849098995814,35cyclictest0-21swapper/200:20:212
1849094995837,17cyclictest20650irq/252-8000000.ethernet20:00:180
1849094995836,18cyclictest20650irq/252-8000000.ethernet21:00:240
1849094995835,20cyclictest20650irq/252-8000000.ethernet22:55:170
1849094995835,20cyclictest20650irq/252-8000000.ethernet22:55:170
1849094995835,20cyclictest20650irq/252-8000000.ethernet20:20:220
1849094995835,19cyclictest20650irq/252-8000000.ethernet23:50:270
1849094995832,23cyclictest0-21swapper/023:55:220
1849094995832,22cyclictest1896868-21phc2sys-jitter23:45:260
1849094995832,22cyclictest0-21swapper/021:50:300
1849094995832,22cyclictest0-21swapper/021:50:300
184909499581,4cyclictest0-21swapper/022:05:050
1849098995719,5cyclictest0-21swapper/221:55:292
1849094995737,15cyclictest20650irq/252-8000000.ethernet00:25:300
1849094995735,19cyclictest20650irq/252-8000000.ethernet21:05:170
1849094995733,21cyclictest20650irq/252-8000000.ethernet22:26:360
184909499572,5cyclictest1878021-21irqstats21:55:230
184909499571,3cyclictest1904433-21meminfo00:30:260
1849098995621,4cyclictest0-21swapper/219:55:202
1849098995618,7cyclictest0-21swapper/220:45:292
1849098995615,9cyclictest0-21swapper/221:00:212
1849094995634,17cyclictest20650irq/252-8000000.ethernet19:20:120
1849094995627,24cyclictest0-21swapper/020:15:310
1849094995627,24cyclictest0-21swapper/020:15:300
184909499562,3cyclictest1881281-21df22:15:170
184909499562,3cyclictest1881281-21df22:15:170
184909499561,5cyclictest1875399-21ssh21:40:220
184909499561,3cyclictest1901919-21/usr/sbin/munin00:15:280
184909499561,3cyclictest1886462-21ssh22:45:220
1849098995528,22cyclictest0-21swapper/220:25:272
1849098995526,23cyclictest0-21swapper/223:30:182
184909899552,5cyclictest1863937-21sshd20:31:332
1849098995525,25cyclictest0-21swapper/223:10:282
1849098995525,25cyclictest0-21swapper/223:10:282
1849098995524,24cyclictest0-21swapper/222:00:152
1849098995524,24cyclictest0-21swapper/222:00:152
1849098995514,7cyclictest0-21swapper/222:40:292
1849094995540,10cyclictest0-21swapper/019:45:050
1849094995534,17cyclictest20650irq/252-8000000.ethernet23:05:190
1849094995530,22cyclictest1885784-21phc2sys22:40:270
1849094995529,23cyclictest1885361-21latency_hist22:40:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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