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2026-08-06 - 10:39

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 Thu Aug 06, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
961429997135,30cyclictest0-21swapper/219:20:002
96142999701,55cyclictest0-21swapper/221:15:162
96142999694,52cyclictest973969-21/usr/sbin/munin20:20:192
961428996812,23cyclictest0-21swapper/100:40:001
96142999671,56cyclictest0-21swapper/220:35:112
96142999671,54cyclictest0-21swapper/223:25:122
96142999661,53cyclictest0-21swapper/223:00:122
961429996524,32cyclictest0-21swapper/221:25:302
96142999651,51cyclictest0-21swapper/223:35:142
96142999651,51cyclictest0-21swapper/220:15:122
961429996441,20cyclictest964306-21munin-plugin-st19:25:002
961429996441,20cyclictest964306-21munin-plugin-st19:25:002
96142999631,50cyclictest0-21swapper/222:55:112
96142999631,50cyclictest0-21swapper/222:50:122
961429996240,18cyclictest995811-21munin-plugin-st22:30:002
961429996235,23cyclictest989050-21munin-plugin-st21:50:002
96142999622,52cyclictest1009606-21apt-get23:50:142
96142999622,46cyclictest1017011-21apt-get00:35:012
961429996222,33cyclictest0-21swapper/222:20:282
96142999621,49cyclictest0-21swapper/222:35:152
96142999621,49cyclictest0-21swapper/221:30:112
96142999611,48cyclictest0-21swapper/219:45:112
96142999611,45cyclictest0-21swapper/220:50:102
961425996150,5cyclictest131ktimers/020:45:190
96142999601,46cyclictest0-21swapper/223:45:102
96142999601,45cyclictest0-21swapper/221:00:112
96142999592,49cyclictest982594-21ssh21:10:222
961429995914,36cyclictest0-21swapper/221:20:332
961429995914,36cyclictest0-21swapper/221:20:322
961429995912,40cyclictest167550irq/134-8000000.ethernet-tx223:55:102
96142999582,48cyclictest1012977-21munin-node00:10:092
96142999582,48cyclictest1003690-21apt-get23:15:112
96142999581,46cyclictest0-21swapper/220:00:112
96142999581,43cyclictest0-21swapper/223:30:152
96142999581,43cyclictest0-21swapper/219:40:192
961429995814,39cyclictest1660-21snmpd00:38:542
961429995729,21cyclictest0-21swapper/222:30:202
96142999571,48cyclictest1014113-21/usr/sbin/munin00:15:242
96142999571,45cyclictest0-21swapper/221:40:152
96142999571,43cyclictest0-21swapper/221:05:142
96142999571,43cyclictest0-21swapper/220:55:132
961428995735,12cyclictest231ktimers/122:15:011
96142999564,44cyclictest970130-21unixbench_singl19:55:292
961429995624,27cyclictest0-21swapper/220:15:012
961429995619,32cyclictest0-21swapper/222:00:022
96142999561,47cyclictest968721-21apt-get19:50:132
96142999561,46cyclictest971557-21memory20:05:282
961428995611,6cyclictest986421-21apt-get21:35:011
961425995614,39cyclictest1008413-21mailstats23:40:270
961429995532,19cyclictest1002606-21unixbench_singl23:05:272
96142999552,45cyclictest977349-21apt-get20:40:132
96142999552,45cyclictest977349-21apt-get20:40:132
96142999552,45cyclictest966187-21apt-get19:35:152
96142999551,48cyclictest994086-21sshd22:15:452
96142999551,48cyclictest0-21swapper/222:45:182
96142999543,44cyclictest1015891-21/usr/sbin/munin00:25:242
96142999541,46cyclictest989296-21/usr/sbin/munin21:50:172
96142999541,46cyclictest986784-21/usr/sbin/munin21:35:182
96142999541,42cyclictest0-21swapper/200:20:132
96142999532,44cyclictest991871-21/usr/sbin/munin22:05:182
96142999532,44cyclictest975123-21/usr/sbin/munin20:25:272
96142999532,44cyclictest964506-21munin-node19:25:112
96142999531,47cyclictest1004547-21/usr/sbin/munin23:20:292
96142999531,47cyclictest1004547-21/usr/sbin/munin23:20:282
96142999531,46cyclictest0-21swapper/200:00:232
96142999531,46cyclictest0-21swapper/200:00:232
96142999531,45cyclictest990951-21apt-get22:00:142
96142999531,45cyclictest990951-21apt-get22:00:142
96142999531,45cyclictest1012342-21/usr/sbin/munin00:05:272
96142999531,45cyclictest1008106-21/usr/sbin/munin23:40:202
96142999531,45cyclictest1003471-21sshd23:12:442
96142999531,44cyclictest978392-21/usr/sbin/munin20:45:212
96142999531,43cyclictest965346-21apt-get19:30:142
961428995322,18cyclictest231ktimers/119:35:121
96142999522,43cyclictest962027-21/usr/sbin/munin19:10:272
96142999521,44cyclictest992864-21/usr/sbin/munin22:10:212
96142999521,43cyclictest975648-21munin-node20:30:112
961425995218,30cyclictest0-21swapper/023:20:000
96142999511,43cyclictest998057-21/usr/sbin/munin22:40:232
96142599508,4cyclictest0-21swapper/023:00:170
961425995032,15cyclictest167350irq/118-8000000.ethernet-tx020:55:260
961428994940,6cyclictest994109-21cron22:20:011
961428994939,6cyclictest996650-21munin-plugin-st22:35:001
961425994940,6cyclictest973761-21sendmail20:20:000
961425994937,8cyclictest970605-21grep20:00:220
96142599492,40cyclictest986698-21latency_hist21:35:020
961425994837,7cyclictest1017125-21grep00:35:020
96142599481,42cyclictest988548-21tune2fs21:45:210
961425994729,14cyclictest167350irq/118-8000000.ethernet-tx000:00:130
961425994729,14cyclictest167350irq/118-8000000.ethernet-tx000:00:120
961425994718,27cyclictest15-21rcuc/020:30:200
96142599466,38cyclictest0-21swapper/023:40:000
96142599462,40cyclictest1003396-21grep23:10:290
961428994533,9cyclictest978111-21cat20:45:021
961428994533,9cyclictest978111-21cat20:45:021
961425994537,4cyclictest167350irq/118-8000000.ethernet-tx022:05:220
961425994536,5cyclictest167350irq/118-8000000.ethernet-tx023:20:290
961425994536,5cyclictest167350irq/118-8000000.ethernet-tx023:20:280
96142899448,5cyclictest972056-21gpg-connect-age20:10:001
96142599446,34cyclictest967232-21tune2fs19:40:250
961425994437,4cyclictest167350irq/118-8000000.ethernet-tx020:10:010
961425994436,4cyclictest167350irq/118-8000000.ethernet-tx023:10:020
961425994435,6cyclictest0-21swapper/022:55:260
961425994434,7cyclictest982203-21munin-plugin-st21:10:000
961425994429,10cyclictest0-21swapper/020:50:280
96142599442,38cyclictest969860-21memory19:55:250
961425994414,3cyclictest1005693-21memory23:25:240
96142599441,27cyclictest0-21swapper/022:30:020
96142899433,25cyclictest231ktimers/119:15:011
961428994331,8cyclictest997541-21grep22:35:291
961428994328,9cyclictest0-21swapper/121:45:291
961428994317,13cyclictest231ktimers/120:10:121
96142599436,35cyclictest0-21swapper/000:25:150
961425994335,4cyclictest1013609-21cron00:14:590
961425994334,6cyclictest985577-21cron21:30:000
961425994332,7cyclictest998376-21grep22:40:270
961428994226,10cyclictest0-21swapper/122:25:011
961425994235,3cyclictest15-21rcuc/000:15:210
961425994234,5cyclictest0-21swapper/020:35:110
96142599423,35cyclictest0-21swapper/020:25:260
961425994232,7cyclictest0-21swapper/019:20:210
961425994232,7cyclictest0-21swapper/019:20:200
961425994230,9cyclictest0-21swapper/022:05:000
961425994230,9cyclictest0-21swapper/022:05:000
961428994129,8cyclictest0-21swapper/121:00:271
961428994128,9cyclictest0-21swapper/119:45:291
96142599416,21cyclictest12-21ksoftirqd/023:35:010
961425994128,9cyclictest0-21swapper/019:15:320
96142599411,38cyclictest12-21ksoftirqd/019:10:200
96142599411,38cyclictest0-21swapper/022:45:220
96142599411,37cyclictest131ktimers/000:25:000
96142599411,36cyclictest0-21swapper/023:55:020
96142999405,27cyclictest0-21swapper/219:10:012
96142599404,8cyclictest988048-21grep21:40:290
961425994031,6cyclictest987354-21latency_hist21:40:010
961425994031,6cyclictest131ktimers/022:20:120
961425994023,15cyclictest0-21swapper/020:10:040
96142599401,37cyclictest0-21swapper/021:25:000
96142599401,37cyclictest0-21swapper/021:25:000
96142599401,36cyclictest996294-21kernelversion22:30:240
961428993930,5cyclictest982113-21grep21:05:301
96142899392,24cyclictest24-21ksoftirqd/100:25:131
961425993933,4cyclictest0-21swapper/022:35:120
961425993931,4cyclictest0-21swapper/022:15:280
961425993928,8cyclictest0-21swapper/021:50:290
96142599391,5cyclictest980794-21df21:00:160
96142599391,36cyclictest0-21swapper/000:35:050
96142599391,34cyclictest0-21swapper/000:05:160
961428993825,8cyclictest0-21swapper/119:50:291
961428993825,8cyclictest0-21swapper/119:10:191
961428993825,7cyclictest989805-21grep21:50:291
961428993824,10cyclictest0-21swapper/120:45:251
961428993820,11cyclictest231ktimers/121:15:141
96142599389,19cyclictest12-21ksoftirqd/019:35:010
961425993833,2cyclictest0-21swapper/019:30:260
961425993821,15cyclictest0-21swapper/023:45:110
961425993821,15cyclictest0-21swapper/022:10:160
96142599381,35cyclictest0-21swapper/021:55:160
96142599381,2cyclictest0-21swapper/020:25:000
961428993728,5cyclictest0-21swapper/120:55:291
961428993727,7cyclictest964839-21phc2sys19:25:251
961428993726,7cyclictest0-21swapper/120:50:221
961428993720,12cyclictest231ktimers/120:30:141
96142899371,30cyclictest0-21swapper/119:40:291
961425993720,15cyclictest0-21swapper/020:40:210
961425993720,15cyclictest0-21swapper/020:40:200
961428993629,4cyclictest984736-21cron21:25:011
961428993629,4cyclictest984736-21cron21:25:011
961428993627,6cyclictest992323-21grep22:05:281
961428993627,5cyclictest999994-21grep22:50:281
961428993626,7cyclictest0-21swapper/121:15:001
961428993622,9cyclictest0-21swapper/100:30:301
961425993629,5cyclictest965143-21munin-plugin-st19:29:590
961425993627,7cyclictest0-21swapper/019:45:280
961428993528,3cyclictest0-21swapper/100:05:311
961428993527,5cyclictest985783-21/usr/sbin/munin21:30:251
961428993527,5cyclictest0-21swapper/123:00:291
961428993523,5cyclictest0-21swapper/123:50:271
961428993518,9cyclictest0-21swapper/123:15:181
961428993517,15cyclictest231ktimers/121:55:171
96142899351,27cyclictest0-21swapper/122:40:181
96142899346,23cyclictest0-21swapper/123:45:011
961428993428,4cyclictest961422-21cyclictest00:00:421
961428993428,4cyclictest961422-21cyclictest00:00:421
961428993428,3cyclictest0-21swapper/100:20:301
961428993423,7cyclictest0-21swapper/123:10:281
961428993421,9cyclictest0-21swapper/123:35:281
961428993420,7cyclictest0-21swapper/122:00:241
961428993420,7cyclictest0-21swapper/122:00:231
961425993428,4cyclictest131ktimers/022:50:180
96142599341,31cyclictest0-21swapper/021:14:430
961428993327,3cyclictest0-21swapper/123:30:301
961428993315,4cyclictest967663-21kworker/u8:0-events_freezable_power_20:00:021
961425993327,4cyclictest20850irq/208-8000000.ethernet21:15:250
96142599331,26cyclictest12-21ksoftirqd/023:55:020
961428993224,5cyclictest231ktimers/100:15:261
961428993221,8cyclictest1660-21snmpd19:20:231
961428993221,8cyclictest1660-21snmpd19:20:231
961428993221,7cyclictest0-21swapper/120:05:011
96142599327,23cyclictest0-21swapper/019:50:180
961428993124,4cyclictest167450irq/126-8000000.ethernet-tx123:21:171
961428993124,4cyclictest167450irq/126-8000000.ethernet-tx123:21:171
961428993123,5cyclictest984941-21/usr/sbin/munin21:25:181
961428993121,7cyclictest0-21swapper/123:45:271
961428993117,8cyclictest22-21rcuc/120:20:251
961428993022,4cyclictest22-21rcuc/120:35:291
961428993021,6cyclictest0-21swapper/120:25:281
961428993016,11cyclictest231ktimers/119:30:101
961428992921,4cyclictest0-21swapper/121:40:201
961428992920,7cyclictest0-21swapper/122:25:181
961428992919,7cyclictest0-21swapper/122:45:301
961428992915,7cyclictest231ktimers/123:05:111
961428992913,12cyclictest22-21rcuc/123:25:181
961428992820,5cyclictest973109-21/usr/sbin/munin20:15:241
96142899281,22cyclictest0-21swapper/100:10:061
961428992716,8cyclictest1010967-21grep23:55:271
961428992619,3cyclictest1000509-21grep22:55:221
961428992516,5cyclictest0-21swapper/119:10:021
961425992515,5cyclictest961461-21latency_hist19:10:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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