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2026-08-07 - 11:04

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 792 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
184909499552,4cyclictest1901041-21memory00:10:240
1849098995421,4cyclictest0-21swapper/223:35:282
1849098995416,7cyclictest0-21swapper/219:35:282
1849098995416,31cyclictest0-21swapper/222:10:292
1849097995431,14cyclictest231ktimers/100:20:121
184909499549,6cyclictest0-21swapper/020:05:290
1849094995440,10cyclictest1283-21cron21:30:010
1849094995415,32cyclictest0-21swapper/020:15:000
1849098995326,24cyclictest167550irq/134-8000000.ethernet-tx221:15:202
1849098995324,25cyclictest0-21swapper/223:45:292
1849098995320,4cyclictest0-21swapper/200:10:282
1849098995311,9cyclictest0-21swapper/219:15:012
1849097995336,12cyclictest0-21swapper/122:20:001
1849097995336,12cyclictest0-21swapper/122:20:001
1849094995321,25cyclictest1892797-21grep23:20:300
184909499531,3cyclictest1660-21snmpd20:48:100
1849098995220,6cyclictest0-21swapper/221:30:292
1849098995219,6cyclictest0-21swapper/222:35:262
1849097995229,16cyclictest231ktimers/119:20:151
1849094995230,18cyclictest1863277-21date20:30:010
1849094995212,5cyclictest0-21swapper/023:45:010
1849097995131,13cyclictest231ktimers/123:25:111
1849094995127,22cyclictest20850irq/208-8000000.ethernet20:35:140
184909499512,4cyclictest1875028-21munin-run21:40:000
184909899501,27cyclictest1874384-21/usr/sbin/munin21:35:232
1849097995027,16cyclictest231ktimers/120:25:101
1849097994910,16cyclictest1863318-21/usr/sbin/munin20:30:191
1849094994930,16cyclictest0-21swapper/019:10:010
1849094994928,18cyclictest0-21swapper/023:15:300
1849097994831,11cyclictest231ktimers/122:40:141
1849094994813,3cyclictest20850irq/208-8000000.ethernet23:35:220
1849098994722,4cyclictest0-21swapper/223:25:452
1849098994718,7cyclictest311ktimers/200:25:252
1849098994711,5cyclictest0-21swapper/223:15:232
1849097994722,18cyclictest231ktimers/120:10:111
1849098994620,8cyclictest1660-21snmpd21:25:222
1849097994633,10cyclictest1864806-21munin-plugin-st20:39:591
1849097994632,10cyclictest0-21swapper/120:20:001
1849097994632,10cyclictest0-21swapper/120:20:001
1849098994520,9cyclictest1898202-21/usr/sbin/munin23:55:192
1849097994529,12cyclictest0-21swapper/120:55:181
1849097994527,12cyclictest231ktimers/119:50:141
1849097994525,14cyclictest231ktimers/120:50:121
1849097994413,25cyclictest1872938-21if_eth021:25:231
1849097994411,10cyclictest24-21ksoftirqd/123:15:011
1849097994411,10cyclictest24-21ksoftirqd/123:15:011
1849098994335,4cyclictest1875883-21munin-plugin-st21:45:012
1849098994314,9cyclictest1882091-21apt-get22:20:132
1849097994326,13cyclictest231ktimers/122:30:121
1849097994318,17cyclictest231ktimers/123:45:111
1849097994311,24cyclictest22-21rcuc/122:30:011
1849097994226,9cyclictest1894402-21ptp4l23:30:271
1849098994119,5cyclictest1866697-21/usr/sbin/munin20:50:152
1849097994129,6cyclictest0-21swapper/121:15:151
1849097994125,10cyclictest0-21swapper/121:40:291
1849098994027,8cyclictest0-21swapper/222:50:302
1849098994016,7cyclictest0-21swapper/200:20:022
184909799408,20cyclictest1857313-21/usr/sbin/munin19:55:191
1849097994024,12cyclictest231ktimers/100:25:161
1849097994015,22cyclictest0-21swapper/121:13:231
1849097994015,22cyclictest0-21swapper/121:13:231
1849097994013,24cyclictest22-21rcuc/123:00:011
1849097994013,24cyclictest22-21rcuc/123:00:011
1849098993926,9cyclictest0-21swapper/220:20:282
1849097993927,7cyclictest1874987-21grep21:35:291
1849097993927,6cyclictest1895376-21grep23:35:281
1849097993927,6cyclictest0-21swapper/100:35:291
1849097993925,9cyclictest0-21swapper/123:40:271
1849097993925,9cyclictest0-21swapper/119:35:281
1849097993924,10cyclictest1876658-21grep21:45:311
184909799392,29cyclictest1890301-21kworker/u8:3+rpciod23:52:221
184909799391,5cyclictest0-21swapper/123:10:011
1849097993828,5cyclictest0-21swapper/120:45:291
1849097993826,6cyclictest0-21swapper/121:55:281
1849097993823,8cyclictest0-21swapper/121:50:301
1849097993823,8cyclictest0-21swapper/121:50:301
184909799381,31cyclictest1858170-21/usr/sbin/munin20:00:191
1849098993725,8cyclictest0-21swapper/221:45:312
1849098993724,9cyclictest0-21swapper/221:10:012
1849097993729,5cyclictest1889399-21grep23:00:281
1849097993727,6cyclictest1850968-21grep19:15:291
1849097993727,6cyclictest1850968-21grep19:15:291
1849097993726,7cyclictest0-21swapper/119:15:011
1849097993723,10cyclictest0-21swapper/123:55:271
1849098993625,6cyclictest1888524-21grep22:55:282
1849098993625,6cyclictest1888524-21grep22:55:272
1849098993625,6cyclictest0-21swapper/222:30:292
184909799364,11cyclictest24-21ksoftirqd/121:05:021
1849097993628,5cyclictest1892014-21sendmail23:20:001
1849097993625,6cyclictest1855241-21grep19:40:291
1849097993624,7cyclictest0-21swapper/122:15:001
1849097993624,7cyclictest0-21swapper/122:00:281
1849097993624,7cyclictest0-21swapper/122:00:281
184909799361,2cyclictest0-21swapper/122:40:011
1849098993527,4cyclictest0-21swapper/222:45:312
1849098993525,7cyclictest0-21swapper/222:15:292
1849098993525,7cyclictest0-21swapper/222:15:282
1849098993516,5cyclictest1860489-21apt-get20:15:012
1849098993516,5cyclictest1860489-21apt-get20:15:012
1849097993524,7cyclictest0-21swapper/120:25:001
184909799351,28cyclictest0-21swapper/122:20:111
1849098993426,5cyclictest1851018-21cron19:20:002
1849098993426,5cyclictest1851018-21cron19:20:002
1849098993425,5cyclictest0-21swapper/219:25:302
1849097993421,7cyclictest0-21swapper/122:50:291
1849097993421,4cyclictest1875859-21kworker/u8:4+events_power_efficient22:05:061
1849097993420,9cyclictest0-21swapper/122:50:021
184909799341,2cyclictest0-21swapper/119:50:011
1849098993324,6cyclictest0-21swapper/221:50:302
1849098993324,6cyclictest0-21swapper/221:50:292
1849098993323,6cyclictest0-21swapper/223:00:292
1849098993322,8cyclictest0-21swapper/219:55:002
1849098993220,8cyclictest0-21swapper/221:15:012
1849098993220,8cyclictest0-21swapper/221:15:002
1849097993220,7cyclictest0-21swapper/120:45:001
184909799321,2cyclictest0-21swapper/100:10:011
184909799321,26cyclictest1660-21snmpd23:20:441
184909799311,27cyclictest1899060-21/usr/sbin/munin00:00:231
184909799311,27cyclictest1899060-21/usr/sbin/munin00:00:231
1849097993022,5cyclictest0-21swapper/119:30:291
1849098992922,4cyclictest0-21swapper/219:30:222
1849097992920,4cyclictest0-21swapper/120:05:291
1849097992915,7cyclictest0-21swapper/100:10:281
1849097992819,6cyclictest1869907-21unixbench_singl21:05:281
1849097992720,5cyclictest0-21swapper/121:30:211
1849098992617,4cyclictest0-21swapper/200:30:212
1849097992619,5cyclictest0-21swapper/119:10:011
184909899204,6cyclictest0-21swapper/219:10:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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