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2026-05-08 - 09:19

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 all highest latencies:
System rackeslot6s.osadl.org (updated Fri May 08, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1237409998844,41cyclictest1246945-21munin-plugin-st20:05:013
123740399791,35cyclictest231ktimers/121:50:191
123740299632,57cyclictest0-21swapper/021:35:130
1237405996235,7cyclictest0-21swapper/221:35:282
123740299607,16cyclictest15-21rcuc/021:55:010
1237402995949,6cyclictest0-21swapper/000:30:100
1237402995529,21cyclictest131ktimers/020:20:120
1237402995528,24cyclictest20650irq/252-8000000.ethernet20:05:240
1237402995513,25cyclictest12-21ksoftirqd/019:10:020
123740399531,31cyclictest0-21swapper/120:55:011
1237402995338,11cyclictest1246096-21sendmail20:00:000
1237402995332,15cyclictest167350irq/118-8000000.ethernet-tx019:15:040
1237402995326,23cyclictest1243471-21tail19:40:280
1237403995241,7cyclictest1273198-21sendmail22:39:591
1237402995222,24cyclictest0-21swapper/023:30:130
1237402995115,4cyclictest12-21ksoftirqd/000:10:000
1237402995023,20cyclictest20650irq/252-8000000.ethernet00:10:020
1237402994941,5cyclictest1269815-21munin-plugin-st22:20:010
1237402994928,13cyclictest131ktimers/023:05:120
1237403994841,4cyclictest1293738-21sendmail00:40:011
1237403994840,5cyclictest0-21swapper/121:45:011
1237403994834,10cyclictest0-21swapper/121:25:291
123740399481,26cyclictest0-21swapper/120:00:001
1237402994841,4cyclictest167350irq/118-8000000.ethernet-tx022:40:230
1237402994840,4cyclictest167350irq/118-8000000.ethernet-tx021:00:010
1237402994838,6cyclictest1274926-21unixbench_singl22:45:300
1237402994835,10cyclictest1283-21cron20:49:590
1237402994825,20cyclictest20650irq/252-8000000.ethernet22:30:260
1237402994824,21cyclictest20650irq/252-8000000.ethernet20:15:180
1237402994823,22cyclictest20650irq/252-8000000.ethernet20:35:280
1237402994823,22cyclictest20650irq/252-8000000.ethernet20:35:270
1237402994819,27cyclictest0-21swapper/023:00:240
1237403994736,7cyclictest0-21swapper/122:15:001
1237402994725,20cyclictest20650irq/252-8000000.ethernet21:15:240
1237402994725,19cyclictest20650irq/252-8000000.ethernet21:05:180
1237402994725,19cyclictest20650irq/252-8000000.ethernet20:55:000
1237402994724,20cyclictest20650irq/252-8000000.ethernet23:25:170
1237402994724,20cyclictest20650irq/252-8000000.ethernet19:30:000
1237402994723,21cyclictest20650irq/252-8000000.ethernet19:45:270
1237402994719,24cyclictest1270676-21wc22:25:010
1237403994636,7cyclictest1278343-21munin-plugin-st23:10:011
123740299462,6cyclictest1244659-21df19:50:160
1237402994626,13cyclictest131ktimers/022:05:110
1237402994624,20cyclictest20650irq/252-8000000.ethernet23:15:280
1237402994624,20cyclictest20650irq/252-8000000.ethernet23:15:280
1237402994624,19cyclictest20650irq/252-8000000.ethernet23:55:200
1237402994624,19cyclictest20650irq/252-8000000.ethernet20:40:270
1237402994624,19cyclictest20650irq/252-8000000.ethernet20:40:270
1237403994537,5cyclictest1242710-21latency_hist19:40:001
1237403994533,7cyclictest0-21swapper/121:35:291
1237403994532,8cyclictest0-21swapper/123:45:291
1237402994537,4cyclictest167350irq/118-8000000.ethernet-tx021:40:190
1237402994537,4cyclictest167350irq/118-8000000.ethernet-tx019:20:180
1237402994530,10cyclictest0-21swapper/023:00:010
1237402994524,19cyclictest20650irq/252-8000000.ethernet22:00:140
1237402994523,19cyclictest20650irq/252-8000000.ethernet21:20:170
1237402994523,19cyclictest20650irq/252-8000000.ethernet21:20:170
1237402994523,19cyclictest20650irq/252-8000000.ethernet00:20:270
1237402994521,22cyclictest0-21swapper/020:35:010
1237405994429,11cyclictest0-21swapper/221:20:002
1237403994431,8cyclictest0-21swapper/100:00:301
1237403994430,9cyclictest0-21swapper/121:30:301
1237403994427,12cyclictest0-21swapper/119:40:281
1237402994437,4cyclictest167350irq/118-8000000.ethernet-tx021:55:290
1237402994437,4cyclictest167350irq/118-8000000.ethernet-tx019:35:170
1237402994424,18cyclictest20650irq/252-8000000.ethernet21:10:160
1237402994422,17cyclictest131ktimers/000:15:120
1237402994421,21cyclictest0-21swapper/020:00:260
1237402994419,23cyclictest1283094-21if_eth123:35:230
1237402994419,23cyclictest0-21swapper/022:10:290
1237402994413,28cyclictest0-21swapper/023:10:270
1237405994330,8cyclictest0-21swapper/221:50:292
1237403994334,5cyclictest0-21swapper/121:10:261
1237403994332,7cyclictest0-21swapper/120:05:281
1237403994324,9cyclictest0-21swapper/123:35:021
1237402994323,18cyclictest20650irq/252-8000000.ethernet23:55:010
1237402994323,18cyclictest20650irq/252-8000000.ethernet23:55:010
1237402994322,19cyclictest20650irq/252-8000000.ethernet23:45:280
1237405994228,9cyclictest0-21swapper/219:40:272
1237405994228,10cyclictest0-21swapper/220:40:022
1237405994228,10cyclictest0-21swapper/220:40:022
123740599421,33cyclictest1256241-21unixbench_singl20:55:272
123740399428,30cyclictest231ktimers/121:10:011
1237403994232,6cyclictest1251895-21grep20:30:281
1237403994229,9cyclictest0-21swapper/100:30:291
1237403994224,10cyclictest0-21swapper/123:25:291
123740399421,22cyclictest0-21swapper/123:55:011
123740399421,22cyclictest0-21swapper/123:55:011
1237402994224,16cyclictest0-21swapper/022:25:270
1237402994224,16cyclictest0-21swapper/022:25:270
123740299422,38cyclictest0-21swapper/020:25:210
123740299422,38cyclictest0-21swapper/020:25:210
123740299421,36cyclictest0-21swapper/023:25:010
1237405994131,6cyclictest1270610-21grep22:20:282
1237405994126,9cyclictest0-21swapper/221:40:292
1237403994132,5cyclictest0-21swapper/123:40:001
1237403994130,8cyclictest0-21swapper/119:20:001
1237403994128,8cyclictest0-21swapper/122:45:011
1237403994126,8cyclictest0-21swapper/120:55:201
1237402994135,3cyclictest0-21swapper/021:30:270
1237402994121,18cyclictest20650irq/252-8000000.ethernet00:00:160
1237402994118,21cyclictest0-21swapper/022:35:220
1237402994118,20cyclictest0-21swapper/022:50:270
1237402994118,20cyclictest0-21swapper/022:50:270
1237402994118,20cyclictest0-21swapper/021:45:220
123740299411,38cyclictest0-21swapper/023:40:170
1237405994031,5cyclictest1287659-21grep00:00:302
1237402994017,18cyclictest0-21swapper/021:05:010
1237405993929,5cyclictest0-21swapper/223:30:212
1237403993930,4cyclictest0-21swapper/123:15:161
1237403993930,4cyclictest0-21swapper/123:15:151
1237403993929,6cyclictest1260439-21grep21:20:281
1237403993929,6cyclictest1260439-21grep21:20:281
1237403993928,7cyclictest0-21swapper/123:20:281
1237402993917,20cyclictest0-21swapper/021:25:150
123740299391,5cyclictest0-21swapper/000:25:170
1237405993829,5cyclictest0-21swapper/220:10:282
1237405993828,7cyclictest1273982-21unixbench_singl22:40:282
1237405993823,6cyclictest0-21swapper/200:20:322
123740599382,10cyclictest1292649-21grep00:30:262
1237403993831,4cyclictest167450irq/126-8000000.ethernet-tx121:55:141
1237403993827,7cyclictest0-21swapper/120:35:271
1237403993827,7cyclictest0-21swapper/120:35:271
1237403993825,8cyclictest0-21swapper/119:10:271
1237403993824,9cyclictest0-21swapper/120:40:271
1237403993824,9cyclictest0-21swapper/120:40:271
123740299382,5cyclictest1248175-21sh20:10:200
1237405993731,3cyclictest1251097-21unixbench_singl20:25:272
1237405993731,3cyclictest1251097-21unixbench_singl20:25:272
1237405993723,9cyclictest1291982-21grep00:25:292
1237405993720,9cyclictest0-21swapper/222:50:292
1237405993720,9cyclictest0-21swapper/222:50:292
123740599371,4cyclictest0-21swapper/221:30:012
1237403993730,4cyclictest167450irq/126-8000000.ethernet-tx122:50:151
1237403993730,4cyclictest167450irq/126-8000000.ethernet-tx122:50:151
1237403993728,4cyclictest0-21swapper/120:15:301
1237402993718,17cyclictest0-21swapper/000:35:270
1237402993717,18cyclictest0-21swapper/019:30:170
1237402993717,18cyclictest0-21swapper/019:30:170
123740599366,22cyclictest0-21swapper/223:15:002
1237405993627,5cyclictest0-21swapper/200:15:282
1237405993627,4cyclictest0-21swapper/219:10:282
1237405993625,7cyclictest1257107-21grep21:00:272
1237405993624,7cyclictest0-21swapper/223:15:212
1237405993624,7cyclictest0-21swapper/223:15:212
1237405993624,6cyclictest1283384-21tail23:35:282
1237405993623,9cyclictest0-21swapper/221:55:262
1237405993618,9cyclictest14-21rcu_preempt21:45:122
1237403993627,5cyclictest0-21swapper/120:20:281
1237403993621,11cyclictest231ktimers/122:05:131
123740399361,29cyclictest1240388-21/usr/sbin/munin19:25:181
1237405993526,5cyclictest0-21swapper/223:40:282
1237405993525,5cyclictest0-21swapper/219:50:182
1237405993524,7cyclictest0-21swapper/223:20:202
1237405993524,6cyclictest0-21swapper/223:45:282
1237405993522,9cyclictest0-21swapper/222:35:292
1237405993520,9cyclictest0-21swapper/219:20:282
1237403993525,4cyclictest0-21swapper/122:00:191
1237403993524,7cyclictest0-21swapper/122:25:271
1237403993524,7cyclictest0-21swapper/122:25:271
1237403993523,8cyclictest231ktimers/100:10:121
1237403993523,8cyclictest0-21swapper/123:55:291
1237403993522,8cyclictest0-21swapper/123:10:291
1237403993518,11cyclictest22-21rcuc/121:45:211
1237403993514,14cyclictest0-21swapper/119:25:011
1237405993426,4cyclictest1278238-21unixbench_multi23:05:282
1237405993425,5cyclictest1268927-21grep22:10:302
1237405993424,5cyclictest0-21swapper/223:50:192
1237405993424,5cyclictest0-21swapper/223:50:182
1237405993421,8cyclictest0-21swapper/219:35:252
1237403993427,4cyclictest0-21swapper/122:30:281
1237403993422,8cyclictest0-21swapper/120:10:281
1237405993324,5cyclictest0-21swapper/221:30:302
1237405993322,7cyclictest0-21swapper/200:10:292
1237405993321,8cyclictest0-21swapper/221:15:012
1237403993324,6cyclictest0-21swapper/119:30:291
1237403993324,6cyclictest0-21swapper/119:30:291
1237403993324,4cyclictest0-21swapper/121:20:001
1237403993315,9cyclictest0-21swapper/100:20:011
123740399331,26cyclictest0-21swapper/119:50:181
1237405993225,3cyclictest0-21swapper/221:05:222
1237405993223,5cyclictest1253302-21cut20:40:202
1237405993223,5cyclictest1253302-21cut20:40:202
1237405993218,8cyclictest0-21swapper/220:55:012
1237405993217,10cyclictest0-21swapper/220:50:012
1237405993216,9cyclictest1276866-21/usr/sbin/munin23:00:182
1237403993222,6cyclictest0-21swapper/100:20:311
1237403993212,14cyclictest231ktimers/122:15:141
123740599317,4cyclictest1653-21lldpd22:56:152
1237405993122,5cyclictest0-21swapper/223:25:292
1237405993121,7cyclictest1274332-21/usr/sbin/munin22:45:162
1237405993120,7cyclictest0-21swapper/220:20:282
123740599311,23cyclictest0-21swapper/200:05:112
1237403993123,5cyclictest0-21swapper/122:45:171
1237403993122,5cyclictest0-21swapper/123:00:281
1237403993119,8cyclictest0-21swapper/120:25:191
1237403993119,8cyclictest0-21swapper/120:25:191
123740399311,28cyclictest0-21swapper/120:00:151
1237405993024,3cyclictest0-21swapper/220:05:222
1237405993022,4cyclictest0-21swapper/219:45:292
1237405993020,5cyclictest0-21swapper/221:20:212
1237405993020,5cyclictest0-21swapper/221:20:212
1237405993018,8cyclictest0-21swapper/200:00:012
1237403993022,4cyclictest0-21swapper/100:10:011
1237403993018,7cyclictest0-21swapper/122:55:211
1237403993015,9cyclictest0-21swapper/122:25:011
123740399301,27cyclictest1256524-21/usr/sbin/munin21:00:261
123740399301,27cyclictest0-21swapper/123:40:271
1237405992917,7cyclictest0-21swapper/222:05:022
123740399291,26cyclictest0-21swapper/120:45:161
123740299292,4cyclictest1237456-21cat19:10:010
123740599286,9cyclictest1240388-21/usr/sbin/munin19:25:202
123740599282,13cyclictest1238687-21/usr/sbin/munin19:15:222
1237405992820,4cyclictest0-21swapper/200:35:282
1237405992818,7cyclictest0-21swapper/220:30:192
1237405992816,9cyclictest1246918-21sshd20:01:062
123740599281,25cyclictest0-21swapper/222:28:092
123740599281,25cyclictest0-21swapper/222:28:092
1237403992818,5cyclictest0-21swapper/100:30:011
1237405992719,4cyclictest0-21swapper/219:10:012
1237405992718,6cyclictest0-21swapper/220:15:182
1237405992716,8cyclictest0-21swapper/219:30:292
1237405992716,8cyclictest0-21swapper/219:30:292
123740599271,10cyclictest205-21ptp022:30:072
1237405992617,7cyclictest311ktimers/222:15:152
123740599261,23cyclictest0-21swapper/222:07:112
1237403992619,5cyclictest0-21swapper/119:45:141
1237405992414,5cyclictest0-21swapper/219:55:272
1237403992114,4cyclictest0-21swapper/119:10:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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