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2026-06-04 - 08:48

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 Jun 04, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
411010199714,45cyclictest24-21ksoftirqd/120:25:011
411010299649,43cyclictest30-21rcuc/219:40:002
4110098995927,21cyclictest131ktimers/022:10:000
411009899561,48cyclictest0-21swapper/023:05:100
411009899561,44cyclictest0-21swapper/000:25:010
411010299551,37cyclictest0-21swapper/219:55:012
411010299551,21cyclictest0-21swapper/200:25:022
4110101995443,5cyclictest0-21swapper/120:15:011
4110101995345,4cyclictest4131255-21munin-plugin-st22:00:001
4110101995343,5cyclictest0-21swapper/122:04:591
4110101995315,24cyclictest4155380-21/usr/sbin/munin00:20:191
411009899538,18cyclictest4115900-21gpg-connect-age20:00:010
411009899521,49cyclictest0-21swapper/020:20:090
411010299511,37cyclictest0-21swapper/222:00:022
411010199517,20cyclictest231ktimers/119:25:011
4110098995044,4cyclictest0-21swapper/021:50:120
4110098995042,5cyclictest0-21swapper/020:00:070
4110098995042,4cyclictest167350irq/118-8000000.ethernet-tx022:10:280
411009899502,8cyclictest4128365-21kernelversion21:40:230
411010299491,26cyclictest0-21swapper/200:05:002
4110098994915,12cyclictest15-21rcuc/022:45:010
4110098994832,13cyclictest0-21swapper/021:10:210
4110098994828,14cyclictest131ktimers/021:25:140
411009899482,40cyclictest0-21swapper/023:20:140
411010299478,13cyclictest32-21ksoftirqd/219:25:002
4110098994740,4cyclictest167350irq/118-8000000.ethernet-tx019:10:240
4110098994735,8cyclictest0-21swapper/000:00:290
4110101994635,7cyclictest0-21swapper/120:19:591
4110098994633,9cyclictest0-21swapper/019:35:010
4110098994633,9cyclictest0-21swapper/019:35:010
411009899462,14cyclictest15-21rcuc/019:40:010
411009899461,43cyclictest0-21swapper/021:35:120
411009899461,2cyclictest0-21swapper/000:35:230
411009899461,2cyclictest0-21swapper/000:35:230
4110102994536,6cyclictest4155167-21latency_hist00:20:002
4110101994538,4cyclictest4129568-21munin-run21:50:001
4110098994526,12cyclictest131ktimers/023:00:120
411009899452,39cyclictest4154679-21sh00:15:200
411009899451,41cyclictest0-21swapper/022:05:000
4110102994434,6cyclictest0-21swapper/200:10:282
4110101994434,5cyclictest4138074-21grep22:35:261
411009899441,39cyclictest4144595-21/usr/sbin/munin23:15:250
411009899441,37cyclictest4140887-21latency_hist22:55:000
4110102994323,8cyclictest0-21swapper/220:10:002
4110102994322,11cyclictest311ktimers/221:50:132
4110101994335,4cyclictest167450irq/126-8000000.ethernet-tx119:48:271
4110101994333,7cyclictest4110095-21cyclictest21:50:121
4110101994329,7cyclictest0-21swapper/121:10:001
4110101994317,18cyclictest231ktimers/100:05:011
4110098994337,3cyclictest20650irq/252-8000000.ethernet22:45:100
4110098994328,10cyclictest0-21swapper/021:55:280
411009899432,4cyclictest4146335-21phc2sys-jitter23:25:250
411009899432,4cyclictest4146335-21phc2sys-jitter23:25:250
411009899431,4cyclictest4119649-21ptp4l20:30:220
411009899431,4cyclictest4112073-21gunzip19:20:230
411009899431,39cyclictest0-21swapper/023:10:200
4110102994233,5cyclictest0-21swapper/223:35:002
4110102994229,8cyclictest4129465-21grep21:45:272
4110102994228,9cyclictest0-21swapper/200:35:272
4110102994228,9cyclictest0-21swapper/200:35:272
4110102994228,8cyclictest0-21swapper/221:10:242
411010299421,23cyclictest0-21swapper/219:30:002
411010299421,21cyclictest0-21swapper/220:30:022
411010199421,3cyclictest0-21swapper/119:55:001
411009899421,4cyclictest0-21swapper/021:00:010
411009899421,38cyclictest4135422-21awk22:20:280
411009899421,38cyclictest0-21swapper/020:40:000
411009899421,38cyclictest0-21swapper/020:40:000
411009899421,37cyclictest0-21swapper/000:10:020
411009899421,33cyclictest0-21swapper/020:45:000
411009899421,2cyclictest0-21swapper/022:40:020
411009899421,2cyclictest0-21swapper/021:20:200
411010299415,21cyclictest30-21rcuc/200:30:022
4110102994132,5cyclictest4132116-21apt-key22:05:012
4110101994132,5cyclictest14-21rcu_preempt00:00:011
4110101994131,5cyclictest0-21swapper/122:55:251
4110101994129,6cyclictest4124072-21grep21:10:251
411009899411,36cyclictest0-21swapper/019:50:010
411009899411,34cyclictest0-21swapper/021:05:020
411009899411,34cyclictest0-21swapper/021:05:020
4110102994026,10cyclictest0-21swapper/200:05:292
4110102994026,10cyclictest0-21swapper/200:05:282
4110102994023,9cyclictest0-21swapper/223:00:292
4110101994030,4cyclictest0-21swapper/120:50:251
4110101994027,8cyclictest231ktimers/121:40:071
4110098994033,4cyclictest4147907-21if_eth023:35:220
4110098994032,4cyclictest4117423-21phc2sys20:10:220
411009899402,4cyclictest4135931-21diskstats22:25:170
411009899402,4cyclictest4114046-21irqstats19:40:190
411009899402,34cyclictest4115392-21unixbench_multi19:50:230
411009899401,5cyclictest15-21rcuc/020:30:020
411009899401,4cyclictest4141157-21if_eth122:55:200
411009899401,4cyclictest4117045-21sed20:10:020
411009899401,3cyclictest4134088-21date22:15:010
411009899401,37cyclictest0-21swapper/023:45:000
411009899401,37cyclictest0-21swapper/000:30:260
411009899401,36cyclictest4129011-21forks21:45:180
411009899401,34cyclictest0-21swapper/023:45:020
4110102993931,5cyclictest0-21swapper/223:05:242
4110102993931,4cyclictest0-21swapper/221:25:222
4110102993929,5cyclictest4110832-21grep19:10:292
4110102993929,4cyclictest167550irq/134-8000000.ethernet-tx221:06:212
4110102993927,7cyclictest0-21swapper/219:40:242
4110102993922,12cyclictest311ktimers/221:30:112
4110101993933,4cyclictest4134807-21latency_hist22:20:001
4110101993931,5cyclictest4147368-21tail23:30:271
4110101993918,10cyclictest231ktimers/122:20:121
411009899394,25cyclictest131ktimers/020:50:020
411009899391,4cyclictest4147091-21irqstats23:30:220
411009899391,35cyclictest4150799-21unixbench_singl23:50:280
411009899391,35cyclictest4112503-21munin-run19:30:010
4110102993831,5cyclictest14-21rcu_preempt21:35:212
4110102993830,4cyclictest14-21rcu_preempt00:25:272
4110102993823,8cyclictest0-21swapper/223:50:272
4110101993830,4cyclictest0-21swapper/121:20:261
4110101993830,4cyclictest0-21swapper/120:40:011
4110101993830,4cyclictest0-21swapper/120:40:001
4110101993829,5cyclictest0-21swapper/123:20:181
4110101993824,8cyclictest0-21swapper/119:10:281
4110101993823,9cyclictest0-21swapper/100:10:001
4110101993823,9cyclictest0-21swapper/100:10:001
4110101993822,8cyclictest0-21swapper/122:30:301
411009899381,2cyclictest0-21swapper/000:25:280
411009899381,20cyclictest0-21swapper/022:35:010
4110102993732,3cyclictest14-21rcu_preempt21:40:252
4110102993729,5cyclictest167550irq/134-8000000.ethernet-tx221:16:232
4110102993727,7cyclictest0-21swapper/200:00:002
4110101993730,2cyclictest0-21swapper/122:45:011
4110101993729,4cyclictest0-21swapper/121:25:261
4110101993727,6cyclictest4155064-21grep00:15:311
4110101993727,5cyclictest0-21swapper/123:20:011
411010199372,5cyclictest4115723-21munin-run20:00:011
4110101993712,9cyclictest0-21swapper/121:00:011
4110098993730,4cyclictest0-21swapper/023:55:130
411009899371,34cyclictest0-21swapper/021:30:110
411009899371,34cyclictest0-21swapper/000:05:190
411009899371,34cyclictest0-21swapper/000:05:190
4110102993627,4cyclictest0-21swapper/222:55:262
4110102993623,5cyclictest0-21swapper/220:10:152
4110102993621,11cyclictest311ktimers/220:20:082
4110101993627,6cyclictest231ktimers/121:00:221
4110101993627,6cyclictest231ktimers/121:00:221
4110101993627,5cyclictest0-21swapper/123:05:201
4110098993625,7cyclictest4117954-21cron20:20:000
411009899361,33cyclictest0-21swapper/020:46:490
411010299356,24cyclictest0-21swapper/219:17:082
411010299356,24cyclictest0-21swapper/219:17:082
4110102993530,3cyclictest4114734-21latency_hist19:50:022
4110102993528,4cyclictest0-21swapper/223:35:252
4110102993527,5cyclictest4144929-21cron23:20:002
4110102993524,8cyclictest0-21swapper/222:35:262
4110102993520,8cyclictest0-21swapper/220:30:222
4110101993527,5cyclictest0-21swapper/120:34:591
4110101993527,4cyclictest0-21swapper/123:50:171
4110101993524,6cyclictest4124164-21kworker/u8:0+rpciod21:16:221
4110101993523,9cyclictest22-21rcuc/123:00:261
4110101993522,9cyclictest0-21swapper/100:35:011
4110101993522,8cyclictest0-21swapper/123:45:281
4110101993518,6cyclictest231ktimers/121:35:121
411010199351,31cyclictest0-21swapper/123:40:401
411009899351,2cyclictest0-21swapper/019:20:010
411009899351,2cyclictest0-21swapper/019:20:010
4110102993426,6cyclictest311ktimers/222:15:202
4110102993425,6cyclictest4149528-21sh23:45:202
4110102993425,5cyclictest4125160-21grep21:20:262
4110102993424,7cyclictest0-21swapper/219:30:242
4110102993424,7cyclictest0-21swapper/219:30:242
4110102993420,9cyclictest0-21swapper/222:10:012
4110101993427,3cyclictest4136057-21sh22:25:201
4110101993426,5cyclictest4120096-21kworker/u8:1+rpciod21:33:231
4110101993425,5cyclictest0-21swapper/122:05:211
4110101993424,4cyclictest0-21swapper/123:25:171
4110101993424,4cyclictest0-21swapper/123:25:171
4110101993422,8cyclictest0-21swapper/123:10:281
411009899341,2cyclictest0-21swapper/021:10:010
4110102993327,3cyclictest311ktimers/222:40:272
4110102993326,4cyclictest0-21swapper/221:00:152
4110102993326,4cyclictest0-21swapper/221:00:152
4110102993323,6cyclictest4144036-21grep23:10:282
4110102993323,6cyclictest311ktimers/222:45:212
4110101993324,6cyclictest22-21rcuc/123:35:121
4110101993323,6cyclictest22-21rcuc/122:10:231
4110101993321,8cyclictest22-21rcuc/100:35:281
4110101993321,8cyclictest22-21rcuc/100:35:281
4110101993320,4cyclictest0-21swapper/120:45:011
4110101993315,4cyclictest167450irq/126-8000000.ethernet-tx122:40:261
411009899331,30cyclictest0-21swapper/021:19:400
411010299328,13cyclictest4133233-21/usr/sbin/munin22:10:202
4110102993223,5cyclictest0-21swapper/220:50:232
4110102993222,6cyclictest30-21rcuc/223:25:232
4110102993222,6cyclictest30-21rcuc/223:25:232
4110102993222,5cyclictest0-21swapper/223:40:272
4110102993210,12cyclictest167550irq/134-8000000.ethernet-tx220:36:042
4110102993210,12cyclictest167550irq/134-8000000.ethernet-tx220:36:042
4110101993225,4cyclictest4111414-21sh19:20:011
4110101993225,4cyclictest4111414-21sh19:20:011
4110101993225,4cyclictest0-21swapper/120:00:251
4110101993225,4cyclictest0-21swapper/119:40:221
4110101993224,5cyclictest22-21rcuc/119:30:131
4110101993224,5cyclictest22-21rcuc/119:30:131
4110101993223,6cyclictest22-21rcuc/100:25:261
411010199321,2cyclictest0-21swapper/120:30:011
4110098993210,14cyclictest0-21swapper/019:10:010
4110102993124,4cyclictest4116556-21grep20:00:252
4110102993124,4cyclictest30-21rcuc/220:40:182
4110102993124,4cyclictest14-21rcu_preempt22:30:202
4110102993123,6cyclictest30-21rcuc/222:50:222
4110102993122,6cyclictest4145734-21grep23:20:272
411010299312,23cyclictest832-21systemd-network20:15:202
4110101993124,4cyclictest4154398-21latency_hist00:15:001
4110101993122,6cyclictest22-21rcuc/122:50:231
4110101993120,6cyclictest231ktimers/120:50:011
4110102993011,13cyclictest167550irq/134-8000000.ethernet-tx219:59:362
411010299293,21cyclictest0-21swapper/220:46:202
4110102992922,5cyclictest4135859-21/usr/sbin/munin22:25:172
4110101992917,3cyclictest4112475-21kthreadd19:25:191
411010199291,23cyclictest274-21systemd-journal19:36:321
4110102992821,5cyclictest30-21rcuc/222:20:222
411010299279,5cyclictest167550irq/134-8000000.ethernet-tx220:57:242
411010199271,21cyclictest0-21swapper/120:05:581
4110101992514,5cyclictest0-21swapper/119:10:011
411010299212,14cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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