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2026-08-22 - 14:08

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 here to display the system's profile data or here to proceed to next system.
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 Sat Aug 22, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
248221099601,19cyclictest0-21swapper/022:10:190
248221099601,19cyclictest0-21swapper/022:10:190
2482210995423,27cyclictest15-21rcuc/019:50:260
2482211995243,5cyclictest2488374-21munin-plugin-st19:45:011
2482211995240,8cyclictest2521575-21munin-plugin-st23:00:001
248221099526,9cyclictest2496056-21apt-get20:30:020
2482210995133,15cyclictest167350irq/118-8000000.ethernet-tx000:05:310
2482210995044,4cyclictest0-21swapper/022:50:110
2482210995043,4cyclictest0-21swapper/021:10:100
2482211994938,6cyclictest2494364-21sendmail20:20:011
2482210994841,4cyclictest167350irq/118-8000000.ethernet-tx022:05:240
248221099482,6cyclictest2511303-21unixbench_singl21:55:280
248221099481,6cyclictest2519275-21cpu22:45:150
2482210994811,19cyclictest12-21ksoftirqd/022:40:010
2482214994740,4cyclictest2482710-21phc2sys19:10:252
248221099473,7cyclictest2504245-21memory21:15:260
2482214994636,5cyclictest0-21swapper/223:25:272
2482211994634,8cyclictest0-21swapper/123:15:001
2482211994632,9cyclictest0-21swapper/122:45:281
2482211994632,8cyclictest0-21swapper/100:25:271
248221199461,20cyclictest0-21swapper/119:25:011
2482210994639,4cyclictest20650irq/252-8000000.ethernet23:21:280
2482210994634,8cyclictest167350irq/118-8000000.ethernet-tx019:35:270
2482214994536,5cyclictest2497836-21sendmail20:40:002
2482214994531,9cyclictest0-21swapper/220:55:012
2482211994533,8cyclictest0-21swapper/120:30:291
2482211994530,10cyclictest0-21swapper/100:10:291
2482211994530,10cyclictest0-21swapper/100:10:291
2482210994535,7cyclictest2514733-21sendmail22:20:000
2482214994434,6cyclictest2538452-21grep00:35:292
2482214994434,6cyclictest2538452-21grep00:35:292
2482214994433,7cyclictest311ktimers/200:00:142
2482214994432,7cyclictest2502026-21grep21:00:272
2482211994428,10cyclictest0-21swapper/120:00:001
2482210994436,4cyclictest167350irq/118-8000000.ethernet-tx021:40:230
248221099441,37cyclictest0-21swapper/020:00:160
248221099441,37cyclictest0-21swapper/020:00:150
2482214994335,5cyclictest0-21swapper/221:10:272
2482211994333,7cyclictest2520629-21grep22:50:281
248221199433,23cyclictest0-21swapper/119:55:001
2482211994331,8cyclictest0-21swapper/123:35:281
2482211994331,8cyclictest0-21swapper/119:35:271
248221199431,3cyclictest0-21swapper/121:15:201
248221099432,4cyclictest2492236-21perl20:05:220
248221099431,37cyclictest2483230-21cat19:15:020
2482214994234,4cyclictest2525709-21grep23:20:292
2482214994233,4cyclictest0-21swapper/219:35:012
248221499423,29cyclictest2492036-21/usr/sbin/munin20:05:282
2482214994228,11cyclictest311ktimers/222:10:122
2482214994228,11cyclictest311ktimers/222:10:122
2482214994226,8cyclictest0-21swapper/200:30:282
2482214994222,3cyclictest16601snmpd00:29:552
2482211994230,7cyclictest0-21swapper/121:40:281
2482211994229,9cyclictest0-21swapper/122:25:271
2482211994225,9cyclictest0-21swapper/122:15:291
248221099423,5cyclictest2484660-21memory19:20:230
2482210994231,7cyclictest0-21swapper/021:50:280
2482210994231,6cyclictest0-21swapper/000:15:190
2482210994229,10cyclictest0-21swapper/019:29:590
248221099422,5cyclictest2535503-21fw_packets00:20:220
248221099421,4cyclictest0-21swapper/020:20:010
248221099421,39cyclictest0-21swapper/022:55:270
2482214994134,4cyclictest2535088-21run-parts00:19:592
2482214994133,4cyclictest0-21swapper/222:40:262
2482214994129,5cyclictest2531710-21munin-plugin-st00:00:002
2482211994134,4cyclictest2489207-21cron19:50:011
2482211994131,7cyclictest2523268-21munin-plugin-st23:10:001
2482211994126,10cyclictest0-21swapper/100:15:271
2482211994125,13cyclictest231ktimers/121:50:121
248221099414,4cyclictest0-21swapper/000:30:280
2482210994129,8cyclictest0-21swapper/023:30:290
2482210994129,8cyclictest0-21swapper/023:30:290
2482210994127,9cyclictest0-21swapper/021:25:270
248221099412,3cyclictest2509655-21latency_hist21:50:010
248221099412,37cyclictest0-21swapper/020:25:240
2482214994033,4cyclictest0-21swapper/222:20:292
2482214994031,6cyclictest2484908-21grep19:20:272
2482214994031,5cyclictest1660-21snmpd20:15:302
2482214994030,6cyclictest2521506-21grep22:55:252
2482214994030,6cyclictest2520658-21grep22:50:282
2482214994015,15cyclictest311ktimers/223:50:142
2482211994030,5cyclictest0-21swapper/121:30:321
2482211994030,5cyclictest0-21swapper/121:30:321
2482211994027,8cyclictest2525706-21unixbench_multi23:20:291
2482211994026,8cyclictest0-21swapper/120:05:291
2482211994025,11cyclictest0-21swapper/119:10:281
2482211994022,10cyclictest0-21swapper/100:20:281
248221199402,11cyclictest0-21swapper/119:30:181
2482210994034,4cyclictest167350irq/118-8000000.ethernet-tx021:00:090
2482210994034,4cyclictest0-21swapper/021:20:160
2482210994034,4cyclictest0-21swapper/000:10:200
2482210994034,4cyclictest0-21swapper/000:10:200
2482210994033,4cyclictest0-21swapper/000:00:170
2482210994028,8cyclictest0-21swapper/022:20:280
248221099401,4cyclictest0-21swapper/023:35:180
248221099401,3cyclictest0-21swapper/023:10:210
248221099401,37cyclictest2491040-21date20:00:010
248221099401,37cyclictest0-21swapper/020:40:010
248221099401,36cyclictest2511921-21ps22:00:260
248221099401,2cyclictest0-21swapper/019:35:010
2482214993929,7cyclictest0-21swapper/222:15:302
2482214993928,6cyclictest2523184-21grep23:05:292
2482214993927,7cyclictest0-21swapper/221:55:272
2482214993921,14cyclictest311ktimers/219:50:112
248221199399,26cyclictest22-21rcuc/122:40:021
2482211993926,7cyclictest0-21swapper/120:40:291
2482211993923,9cyclictest274-21systemd-journal22:10:001
2482211993923,9cyclictest0-21swapper/121:35:301
2482210993928,7cyclictest2483625-21/usr/sbin/munin19:15:210
2482210993927,8cyclictest0-21swapper/023:45:280
2482210993922,4cyclictest2508476-1kworker/0:0H+mmc_complete22:35:000
2482210993921,13cyclictest0-21swapper/020:40:300
248221099391,36cyclictest0-21swapper/023:15:220
248221099391,35cyclictest0-21swapper/019:40:180
2482214993832,4cyclictest0-21swapper/220:15:022
2482214993827,8cyclictest311ktimers/220:30:142
2482214993826,8cyclictest311ktimers/200:20:112
2482214993825,8cyclictest0-21swapper/200:10:282
2482214993825,8cyclictest0-21swapper/200:10:282
2482214993825,7cyclictest0-21swapper/219:35:282
2482214993820,12cyclictest0-21swapper/221:20:262
2482214993819,11cyclictest311ktimers/220:20:112
2482214993813,12cyclictest311ktimers/221:25:102
2482211993826,8cyclictest2497761-21unixbench_singl20:35:251
2482211993826,8cyclictest0-21swapper/120:10:281
2482211993825,9cyclictest0-21swapper/120:25:281
2482211993825,8cyclictest0-21swapper/122:30:291
2482211993824,8cyclictest0-21swapper/121:20:291
2482211993823,9cyclictest0-21swapper/100:00:201
248221199381,2cyclictest0-21swapper/121:55:181
248221099388,27cyclictest0-21swapper/021:35:020
248221099388,27cyclictest0-21swapper/021:35:010
2482210993831,4cyclictest20850irq/208-8000000.ethernet23:59:590
2482210993831,4cyclictest20650irq/252-8000000.ethernet23:55:000
2482210993831,4cyclictest20650irq/252-8000000.ethernet21:08:540
2482210993831,4cyclictest167350irq/118-8000000.ethernet-tx000:25:330
2482210993828,7cyclictest0-21swapper/020:55:280
2482214993728,6cyclictest311ktimers/219:55:112
2482214993728,5cyclictest0-21swapper/220:55:282
2482214993726,5cyclictest0-21swapper/223:15:222
2482214993725,6cyclictest0-21swapper/221:50:222
2482211993729,5cyclictest2527489-21grep23:35:011
2482211993729,5cyclictest2527489-21grep23:35:011
2482211993728,5cyclictest0-21swapper/122:20:281
2482211993724,9cyclictest0-21swapper/120:50:281
2482211993723,9cyclictest0-21swapper/100:30:201
2482210993730,4cyclictest20650irq/252-8000000.ethernet23:05:180
2482210993730,4cyclictest20650irq/252-8000000.ethernet22:25:160
248221099371,34cyclictest0-21swapper/020:50:110
2482214993632,2cyclictest0-21swapper/222:40:022
2482214993628,6cyclictest2484076-21unixbench_singl19:15:282
2482214993628,4cyclictest2524070-21grep23:10:292
2482214993627,6cyclictest2491767-21grep20:00:292
2482214993627,6cyclictest2491767-21grep20:00:282
2482214993627,5cyclictest0-21swapper/223:45:282
2482214993624,8cyclictest0-21swapper/221:05:282
248221499361,28cyclictest2517438-21latency_hist22:35:012
2482211993625,7cyclictest0-21swapper/123:50:001
2482211993625,6cyclictest0-21swapper/119:20:001
2482211993624,8cyclictest0-21swapper/121:00:271
2482211993623,9cyclictest0-21swapper/100:35:301
2482211993623,9cyclictest0-21swapper/100:35:301
2482211993619,13cyclictest0-21swapper/122:00:281
2482210993631,2cyclictest0-21swapper/022:45:020
2482210993629,4cyclictest20650irq/252-8000000.ethernet00:35:180
2482210993629,4cyclictest20650irq/252-8000000.ethernet00:35:180
2482210993629,4cyclictest0-21swapper/021:35:210
2482210993628,4cyclictest0-21swapper/020:10:260
248221099361,9cyclictest0-21swapper/019:10:010
248221099361,7cyclictest2526436-21tail23:25:260
2482214993527,4cyclictest0-21swapper/220:25:272
2482214993524,8cyclictest0-21swapper/219:25:262
2482214993521,9cyclictest0-21swapper/223:40:252
2482211993523,9cyclictest0-21swapper/123:55:261
2482211993522,9cyclictest0-21swapper/121:05:191
2482211993522,8cyclictest0-21swapper/100:05:301
2482210993528,4cyclictest20650irq/252-8000000.ethernet20:45:170
2482210993528,4cyclictest20650irq/252-8000000.ethernet20:20:240
248221099351,32cyclictest0-21swapper/019:46:520
2482214993425,5cyclictest2533311-21grep00:05:302
2482214993423,5cyclictest0-21swapper/223:00:192
2482214993422,8cyclictest2512944-21grep22:05:292
2482211993422,9cyclictest0-21swapper/123:15:201
2482211993422,7cyclictest0-21swapper/119:25:251
2482211993417,10cyclictest0-21swapper/121:10:281
2482214993324,5cyclictest0-21swapper/222:00:252
2482214993322,8cyclictest2508176-21/usr/sbin/munin21:40:182
2482211993325,6cyclictest0-21swapper/122:40:271
2482211993324,5cyclictest0-21swapper/120:55:281
2482211993323,7cyclictest0-21swapper/123:54:591
2482211993322,8cyclictest0-21swapper/120:45:271
2482210993323,7cyclictest0-21swapper/023:40:270
2482214993224,4cyclictest0-21swapper/222:30:012
2482214993210,13cyclictest311ktimers/221:30:162
2482214993210,13cyclictest311ktimers/221:30:152
2482211993223,6cyclictest0-21swapper/123:00:281
2482211993223,4cyclictest14-21rcu_preempt20:25:011
2482211993220,8cyclictest0-21swapper/121:45:281
2482211993220,7cyclictest2482206-21cyclictest22:10:111
2482211993220,7cyclictest2482206-21cyclictest22:10:111
248221199321,3cyclictest0-21swapper/120:00:181
248221199321,3cyclictest0-21swapper/120:00:181
2482210993226,4cyclictest19750irq/27-20000000.i2c23:00:170
2482214993122,4cyclictest0-21swapper/223:30:252
2482214993122,4cyclictest0-21swapper/223:30:252
2482214993122,4cyclictest0-21swapper/219:45:002
2482214993121,7cyclictest0-21swapper/223:35:182
2482214993121,7cyclictest0-21swapper/221:35:312
2482214993120,7cyclictest2498573-21grep20:40:282
2482214993120,6cyclictest0-21swapper/222:45:272
2482214993113,10cyclictest2503942-21/usr/sbin/munin21:15:192
2482214993019,7cyclictest0-21swapper/221:45:252
248221199303,18cyclictest231ktimers/123:30:011
248221199301,24cyclictest0-21swapper/123:40:201
2482211992818,8cyclictest2506219-21grep21:25:261
2482214992717,8cyclictest30-21rcuc/219:45:262
2482214992617,6cyclictest2499518-21cron20:50:002
2482211992615,4cyclictest0-21swapper/119:10:021
2482214992114,4cyclictest0-21swapper/219:10:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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