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2026-01-09 - 14:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackbslot5s.osadl.org (updated Fri Jan 09, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177974995225,4cyclictest0-21swapper/123:45:241
177974995136,11cyclictest231ktimers/120:25:121
177970995041,4cyclictest0-21swapper/000:00:000
177970994939,6cyclictest268292-21grep23:25:250
177979994740,4cyclictest226201-21unixbench_singl21:25:252
177983994634,9cyclictest192198-21munin-plugin-st19:50:013
177979994635,7cyclictest186648-21unixbench_singl19:30:242
17798399451,41cyclictest214423-21munin-plugin-st20:55:013
17798399451,41cyclictest214423-21munin-plugin-st20:55:003
177979994535,6cyclictest218476-21fschecks_time21:05:162
177974994234,5cyclictest202460-21idleruntime-cro20:20:001
177974994132,5cyclictest293086-21munin-plugin-st00:40:001
177983994031,5cyclictest209745-21fschecks_time20:40:163
177974994029,7cyclictest0-21swapper/100:19:591
177974994028,8cyclictest287963-21auditctl00:25:011
177974994027,9cyclictest231ktimers/120:40:111
177970994034,3cyclictest179131-21unixbench_multi19:10:240
177970994030,6cyclictest0-21swapper/020:15:260
177970994021,10cyclictest131rcu_preempt20:37:370
177979993921,5cyclictest131rcu_preempt19:35:122
177974993930,5cyclictest0-21swapper/121:00:151
177974993929,5cyclictest197321-21sh20:05:011
177974993928,7cyclictest269945-21grep23:30:251
177974993924,11cyclictest231ktimers/120:20:111
177970993930,7cyclictest257989-21kworker/u8:0+events_unbound22:58:140
177970993930,7cyclictest257989-21kworker/u8:0+events_unbound22:58:140
177970993929,7cyclictest183236-21grep19:20:250
177983993831,4cyclictest226183-21unixbench_singl21:25:253
177983993829,4cyclictest0-21swapper/322:40:163
177983993828,7cyclictest244147-21sendmail22:19:593
177983993828,7cyclictest222711-21grep21:15:253
177974993829,5cyclictest0-21swapper/122:10:001
177974993829,5cyclictest0-21swapper/122:10:001
177970993826,7cyclictest196881-21grep20:00:220
177970993816,5cyclictest131rcu_preempt20:55:010
177970993816,5cyclictest131rcu_preempt20:55:000
177983993729,4cyclictest0-21swapper/321:55:253
177983993728,5cyclictest209289-21munin-plugin-st20:40:013
177979993729,4cyclictest261688-21kworker/u8:1+events_unbound23:08:152
177974993729,4cyclictest0-21swapper/122:30:001
177974993725,9cyclictest260213-21latency_hist23:05:001
177970993731,4cyclictest284295-21kworker/u8:1+events_unbound00:18:170
177970993723,4cyclictest131rcu_preempt00:10:250
177970993722,5cyclictest217725-21kworker/u8:1-events_freezable_power_21:17:110
177983993628,4cyclictest0-21swapper/323:45:013
177983993626,6cyclictest289665-21sh00:30:003
177979993621,7cyclictest245565-21kworker/u8:0+events_unbound22:48:122
17797099364,25cyclictest0-21swapper/023:35:140
177970993630,4cyclictest275466-21kworker/u8:3+events_unbound23:53:170
177970993626,6cyclictest0-21swapper/019:40:240
177970993622,4cyclictest131rcu_preempt00:36:380
177970993620,4cyclictest131rcu_preempt23:22:560
177970993619,9cyclictest131rcu_preempt22:43:040
177970993617,5cyclictest131rcu_preempt23:45:010
177983993527,4cyclictest0-21swapper/321:10:143
177983993527,4cyclictest0-21swapper/320:45:173
177983993527,4cyclictest0-21swapper/320:45:163
177979993528,4cyclictest196009-21fschecks_count20:00:142
177979993525,6cyclictest0-21swapper/219:20:012
177979993524,7cyclictest0-21swapper/220:20:252
177979993517,10cyclictest282557-21kworker/u8:0+events_unbound00:21:012
177974993526,5cyclictest273981-21wc23:45:011
177974993526,5cyclictest0-21swapper/119:20:241
177970993524,5cyclictest131rcu_preempt20:40:160
177970993519,5cyclictest131rcu_preempt20:20:150
177970993517,3cyclictest0-21swapper/021:46:200
177970993517,10cyclictest131rcu_preempt21:39:380
177970993515,12cyclictest131rcu_preempt21:35:000
177970993515,12cyclictest131rcu_preempt19:26:510
177970993515,11cyclictest131rcu_preempt00:25:230
177970993514,10cyclictest131rcu_preempt22:38:390
177983993425,4cyclictest0-21swapper/321:50:173
177983993425,4cyclictest0-21swapper/319:40:143
177983993424,6cyclictest205462-21unixbench_singl20:25:243
177974993425,4cyclictest0-21swapper/119:40:161
177974993423,8cyclictest221012-21grep21:10:241
17797099343,6cyclictest11-21ksoftirqd/023:05:180
177970993425,5cyclictest181912-21cron19:20:020
177970993424,7cyclictest193481-21grep19:50:260
177970993424,6cyclictest0-21swapper/022:00:240
177970993419,5cyclictest131rcu_preempt20:34:570
177970993417,4cyclictest131rcu_preempt22:30:210
177970993413,5cyclictest131rcu_preempt22:10:150
177970993413,5cyclictest131rcu_preempt22:10:140
177983993326,4cyclictest0-21swapper/319:15:163
177983993325,4cyclictest0-21swapper/321:40:233
17797999334,6cyclictest131rcu_preempt21:55:122
177979993327,4cyclictest190213-21kworker/u8:2+events_unbound19:54:402
177979993325,4cyclictest0-21swapper/222:55:142
177979993325,4cyclictest0-21swapper/222:55:132
177979993322,9cyclictest212718-21munin-plugin-st20:50:012
177979993322,9cyclictest212718-21munin-plugin-st20:50:012
177979993315,5cyclictest275466-21kworker/u8:3+events_unbound23:54:352
177974993324,5cyclictest213961-21unixbench_multi20:50:261
177974993324,5cyclictest213961-21unixbench_multi20:50:261
177974993323,6cyclictest0-21swapper/121:00:001
177970993327,3cyclictest0-21swapper/020:00:000
177970993325,4cyclictest0-21swapper/021:40:240
177970993323,4cyclictest131rcu_preempt20:45:220
177970993323,4cyclictest131rcu_preempt20:45:220
177970993316,10cyclictest131rcu_preempt21:02:170
177970993315,11cyclictest131rcu_preempt23:47:130
177970993314,4cyclictest131rcu_preempt22:09:350
177970993314,4cyclictest131rcu_preempt22:09:340
177970993314,16cyclictest121ktimers/019:30:220
177970993312,11cyclictest131rcu_preempt23:14:080
177983993222,7cyclictest184876-21grep19:25:253
177979993226,3cyclictest282828-21kthreadd00:09:592
177979993222,6cyclictest0-21swapper/220:15:252
177974993224,4cyclictest0-21swapper/122:35:241
177974993222,6cyclictest0-21swapper/120:30:281
177974993219,9cyclictest193474-21grep19:50:251
17797099325,7cyclictest11-21ksoftirqd/000:20:230
177970993227,3cyclictest217725-21kworker/u8:1-events_freezable_power_21:05:550
177970993224,5cyclictest208-21systemd-logind20:12:500
177970993224,4cyclictest0-21swapper/022:18:040
177970993222,4cyclictest131rcu_preempt20:25:230
177970993221,7cyclictest121ktimers/021:20:240
177970993219,5cyclictest131rcu_preempt20:05:180
177970993219,4cyclictest131rcu_preempt21:53:110
177970993217,4cyclictest131rcu_preempt21:10:160
177970993216,4cyclictest131rcu_preempt23:02:450
177970993214,5cyclictest131rcu_preempt21:25:150
177970993214,4cyclictest131rcu_preempt19:49:300
177970993212,12cyclictest11-21ksoftirqd/020:55:130
177970993212,11cyclictest131rcu_preempt21:55:110
177983993125,3cyclictest0-21swapper/319:35:243
177983993124,3cyclictest0-21swapper/300:00:263
177983993124,3cyclictest0-21swapper/300:00:263
177983993123,4cyclictest0-21swapper/320:35:003
177983993122,6cyclictest215851-21unixbench_multi20:55:253
177979993125,4cyclictest259729-21kworker/u8:2+events_unbound23:16:082
177979993124,4cyclictest216342-21munin-plugin-st21:00:002
177979993123,4cyclictest0-21swapper/222:50:242
177979993123,4cyclictest0-21swapper/222:50:242
177979993121,6cyclictest0-21swapper/220:40:152
177974993123,4cyclictest0-21swapper/122:58:121
177974993123,4cyclictest0-21swapper/122:58:121
177974993120,8cyclictest226153-21grep21:25:241
177970993125,3cyclictest0-21swapper/023:20:010
17797099312,21cyclictest0-21swapper/022:20:190
177970993116,4cyclictest131rcu_preempt00:34:350
177970993114,5cyclictest131rcu_preempt22:50:020
177970993114,5cyclictest131rcu_preempt22:50:010
177970993114,4cyclictest131rcu_preempt22:47:470
177983993020,5cyclictest0-21swapper/321:45:263
177983993018,8cyclictest217590-21grep21:00:253
177979993024,4cyclictest238927-21kworker/u8:2+events_unbound22:08:032
177979993024,4cyclictest238927-21kworker/u8:2+events_unbound22:08:032
177979993022,4cyclictest0-21swapper/223:45:242
177979993022,4cyclictest0-21swapper/222:20:002
177979993020,6cyclictest0-21swapper/221:20:002
177979993019,8cyclictest235360-21cron21:55:012
177979993019,7cyclictest0-21swapper/223:10:232
17797999301,7cyclictest183669-21latency_hist19:25:012
177974993022,5cyclictest0-21swapper/121:20:011
17797099309,4cyclictest131rcu_preempt00:00:160
17797099309,4cyclictest131rcu_preempt00:00:150
177970993013,4cyclictest131rcu_preempt22:25:330
177983992922,4cyclictest0-21swapper/323:25:263
177983992921,5cyclictest291364-21cron00:35:013
177983992921,4cyclictest0-21swapper/323:00:143
177979992923,4cyclictest278974-21kworker/u8:1+events_unbound00:00:422
177979992923,4cyclictest278974-21kworker/u8:1+events_unbound00:00:412
177979992923,3cyclictest0-21swapper/223:30:012
177979992921,6cyclictest245565-21kworker/u8:0+events_unbound22:27:412
177979992919,7cyclictest1-21systemd23:43:142
17797999291,5cyclictest131rcu_preempt19:10:122
177979992913,6cyclictest217725-21kworker/u8:1+events_unbound21:10:252
177974992920,6cyclictest0-21swapper/119:15:171
177974992920,5cyclictest0-21swapper/120:05:161
177970992913,4cyclictest131rcu_preempt19:39:110
177983992820,4cyclictest0-21swapper/319:55:253
177979992817,7cyclictest204-21dbus-daemon20:27:512
177979992816,5cyclictest263406-21kworker/u8:0+events_unbound23:23:152
177979992816,3cyclictest0-21swapper/223:55:212
177974992820,5cyclictest0-21swapper/122:25:001
177974992818,7cyclictest190926-21fschecks_time19:45:151
177970992812,4cyclictest131rcu_preempt23:30:140
17798399272,21cyclictest629-21snmpd20:10:113
177983992721,4cyclictest258235-21kthreadd23:00:003
177983992721,4cyclictest258235-21kthreadd23:00:003
177983992719,4cyclictest0-21swapper/321:10:003
177983992718,6cyclictest278696-21grep23:55:243
177983992716,7cyclictest0-21swapper/320:10:003
177979992720,5cyclictest190213-21kworker/u8:2+events_unbound19:45:202
177979992717,4cyclictest207796-21kworker/u8:1+events_unbound20:35:562
177979992715,8cyclictest251002-21basename22:40:012
177979992715,8cyclictest0-21swapper/220:50:252
177979992715,8cyclictest0-21swapper/220:50:252
177979992714,7cyclictest190213-21kworker/u8:2+events_unbound20:13:382
177979992711,7cyclictest32-21ksoftirqd/221:45:242
17797999271,15cyclictest0-21swapper/221:01:272
177974992721,3cyclictest0-21swapper/121:30:151
177974992719,5cyclictest272134-21sh23:40:011
177974992719,5cyclictest200285-21unixbench_multi20:10:251
177974992719,4cyclictest0-21swapper/123:20:131
177974992719,4cyclictest0-21swapper/121:55:001
177974992718,5cyclictest0-21swapper/123:10:011
177974992716,7cyclictest280683-21grep00:00:261
177974992716,7cyclictest280683-21grep00:00:261
17797099279,10cyclictest11-21ksoftirqd/000:08:530
177983992619,3cyclictest0-21swapper/323:45:153
177983992618,5cyclictest260537-21fschecks_count23:05:153
177983992618,5cyclictest0-21swapper/322:45:253
177983992618,4cyclictest0-21swapper/323:35:243
177983992616,6cyclictest0-21swapper/321:20:243
177983992614,9cyclictest227055-21apt-get21:30:113
177983992614,7cyclictest0-21swapper/319:10:243
177979992618,6cyclictest231652-21kworker/u8:1+events_unbound22:00:212
177979992618,6cyclictest188461-21kworker/u8:1+events_unbound19:40:182
177979992617,4cyclictest0-21swapper/223:35:162
17797999261,12cyclictest0-21swapper/200:19:012
177979992610,3cyclictest0-21swapper/200:25:162
177974992619,3cyclictest0-21swapper/123:25:251
177974992617,6cyclictest0-21swapper/120:45:171
177974992617,6cyclictest0-21swapper/120:45:161
177974992617,5cyclictest0-21swapper/122:00:251
17798399257,3cyclictest265398-21date23:20:023
177983992519,3cyclictest0-21swapper/319:50:213
177983992518,4cyclictest204164-21cron20:25:013
177983992515,6cyclictest197323-21apt20:05:003
177979992519,4cyclictest190213-21kworker/u8:2+events_unbound20:33:242
17797999251,8cyclictest0-21swapper/221:30:122
17797999251,7cyclictest0-21swapper/200:10:142
177979992515,6cyclictest0-21swapper/221:45:002
177974992518,5cyclictest164-21systemd-journal21:56:391
177974992517,5cyclictest0-21swapper/119:30:011
177974992516,6cyclictest254146-21grep22:45:261
177974992514,8cyclictest241103-21grep22:10:151
177974992514,8cyclictest241103-21grep22:10:151
177983992417,4cyclictest284526-21sh00:15:003
177983992417,4cyclictest0-21swapper/322:30:163
177983992417,3cyclictest0-21swapper/300:20:233
177983992416,4cyclictest240717-21auditctl22:10:003
177983992416,4cyclictest240717-21auditctl22:09:593
177979992418,4cyclictest270051-21kworker/u8:0+events_unbound23:33:212
177979992418,4cyclictest190213-21kworker/u8:2+events_unbound20:06:182
17797999241,5cyclictest0-21swapper/221:20:122
177979992414,6cyclictest0-21swapper/222:30:262
177979992411,6cyclictest32-21ksoftirqd/219:25:152
177974992418,3cyclictest0-21swapper/123:55:211
177974992417,3cyclictest0-21swapper/121:35:261
177974992416,5cyclictest188275-21tail19:35:251
177974992416,5cyclictest0-21swapper/122:30:251
177974992415,6cyclictest185760-21fschecks_time19:30:141
177974992415,6cyclictest0-21swapper/122:15:251
177983992317,3cyclictest0-21swapper/323:20:183
177983992317,3cyclictest0-21swapper/322:25:163
177983992315,4cyclictest0-21swapper/323:50:153
177983992315,4cyclictest0-21swapper/320:15:263
177979992317,4cyclictest238927-21kworker/u8:2+events_unbound22:20:352
177979992317,3cyclictest0-21swapper/219:55:252
177979992315,5cyclictest0-21swapper/221:35:262
177979992312,3cyclictest32-21ksoftirqd/222:11:432
177979992312,3cyclictest32-21ksoftirqd/222:11:432
17797999231,12cyclictest0-21swapper/223:00:172
17797999230,11cyclictest0-21swapper/200:30:252
177974992317,4cyclictest164-21systemd-journal19:56:401
177974992317,3cyclictest0-21swapper/121:05:191
177974992316,5cyclictest208-21systemd-logind22:44:391
177974992316,4cyclictest265295-21sendmail23:20:001
177974992315,6cyclictest231ktimers/122:50:071
177974992315,6cyclictest231ktimers/122:50:071
177974992314,6cyclictest0-21swapper/100:35:001
177983992216,3cyclictest0-21swapper/322:50:143
177983992216,3cyclictest0-21swapper/322:50:133
177983992215,3cyclictest0-21swapper/319:30:213
177983992214,4cyclictest250975-21sendmail22:40:013
177983992212,5cyclictest0-21swapper/321:40:003
177983992211,7cyclictest164-21systemd-journal22:23:053
177983992210,9cyclictest285210-21meminfo00:15:193
17797999226,7cyclictest32-21ksoftirqd/200:35:242
17797999225,12cyclictest252478-21grep22:40:252
177974992216,4cyclictest231ktimers/123:10:151
177974992214,5cyclictest0-21swapper/120:40:011
177974992212,7cyclictest230680-21cut21:40:151
177983992116,3cyclictest269254-21if_eth123:30:163
177983992115,3cyclictest0-21swapper/322:10:193
177983992115,3cyclictest0-21swapper/322:10:193
177983992115,3cyclictest0-21swapper/300:35:193
177983992115,3cyclictest0-21swapper/300:05:133
177983992114,3cyclictest0-21swapper/323:10:233
177974992115,3cyclictest289041-21timerandwakeup00:25:251
177974992114,5cyclictest231ktimers/119:10:111
177974992114,4cyclictest282886-21latency_hist00:10:001
177974992114,4cyclictest276196-21fschecks_time23:50:141
177974992113,4cyclictest0-21swapper/121:20:251
177983992013,5cyclictest391ktimers/322:00:113
177974992013,5cyclictest231ktimers/121:45:121
177974991912,5cyclictest231ktimers/100:10:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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