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2026-08-11 - 08:39

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackbslot5s.osadl.org (updated Tue Aug 11, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2951067995039,8cyclictest311ktimers/220:20:142
2951067994840,6cyclictest3027776-21kworker/u8:0+events_unbound22:50:142
2951067994837,7cyclictest2996095-21grep21:15:282
2951071994740,4cyclictest2952688-21apt-get19:15:003
2951071994740,4cyclictest2952688-21apt-get19:15:003
295106799473,8cyclictest32-21ksoftirqd/220:25:112
295106799473,8cyclictest32-21ksoftirqd/220:25:112
2951067994636,7cyclictest3025799-21grep22:40:262
2951067994533,8cyclictest3060339-21grep00:20:292
2951067994533,8cyclictest3060339-21grep00:20:282
2951062994538,4cyclictest3029600-21cron22:55:011
2951062994538,4cyclictest231ktimers/123:45:141
2951062994536,5cyclictest2972030-21unixbench_multi20:05:271
2951059994437,4cyclictest3019169-21cron22:25:000
2951059994437,4cyclictest3019169-21cron22:25:000
2951059994433,8cyclictest2969082-21sendmail20:00:000
2951071994331,9cyclictest3029611-21apt-get22:55:003
2951062994234,4cyclictest0-21swapper/122:34:591
2951062994233,5cyclictest2956935-21munin-plugin-st19:25:001
2951059994234,4cyclictest3045174-21munin-plugin-st23:39:590
2951071994131,6cyclictest3010216-21grep21:55:233
2951062994128,10cyclictest231ktimers/123:35:111
295106799408,6cyclictest131rcu_preempt00:25:112
2951067994029,6cyclictest0-21swapper/222:50:012
2951059994031,5cyclictest3010632-21audit_send_reply22:00:000
2951071993929,7cyclictest3041773-21munin-plugin-st23:30:003
2951071993929,7cyclictest3041773-21munin-plugin-st23:30:003
2951067993927,9cyclictest311ktimers/221:00:122
2951067993927,9cyclictest311ktimers/221:00:112
2951059993929,7cyclictest2972027-21grep20:05:260
2951071993827,6cyclictest0-21swapper/321:55:003
2951071993824,11cyclictest391ktimers/319:50:143
2951062993830,5cyclictest2963966-21idleruntime-cro19:45:011
2951059993828,6cyclictest0-21swapper/000:10:250
2951071993729,4cyclictest0-21swapper/321:40:003
2951071993729,4cyclictest0-21swapper/300:20:003
2951071993727,6cyclictest0-21swapper/322:35:003
2951071993725,8cyclictest3026210-21auditctl22:45:003
2951067993726,7cyclictest3050701-21grep23:55:152
2951062993729,4cyclictest0-21swapper/123:55:141
2951059993727,6cyclictest0-21swapper/021:50:020
2951067993624,9cyclictest311ktimers/219:50:122
2951067993624,6cyclictest0-21swapper/220:00:272
2951059993629,4cyclictest3036651-21idleruntime-cro23:15:000
2951059993629,4cyclictest3029610-21idleruntime-cro22:55:000
2951059993625,6cyclictest0-21swapper/020:22:180
2951071993527,4cyclictest0-21swapper/321:10:263
2951071993527,4cyclictest0-21swapper/321:10:253
2951071993526,5cyclictest2975397-21unixbench_multi20:15:273
2951071993510,16cyclictest40-21ksoftirqd/322:20:123
2951071993510,16cyclictest40-21ksoftirqd/322:20:123
295106799352,5cyclictest131rcu_preempt20:40:142
295106799351,5cyclictest131rcu_preempt19:30:142
2951062993526,5cyclictest0-21swapper/100:05:001
2951062993524,7cyclictest0-21swapper/121:35:021
2951059993525,6cyclictest0-21swapper/021:05:010
2951059993525,6cyclictest0-21swapper/021:05:000
2951059993525,6cyclictest0-21swapper/019:25:270
2951059993525,5cyclictest0-21swapper/020:45:270
2951059993524,7cyclictest0-21swapper/021:25:240
2951071993428,4cyclictest2984354-21kworker/u8:1+events_unbound20:42:223
2951071993427,5cyclictest3041618-21kworker/u8:0+events_unbound23:42:453
2951071993426,5cyclictest0-21swapper/321:00:013
2951071993424,6cyclictest0-21swapper/319:30:273
2951067993422,8cyclictest3000746-21tr21:30:242
2951062993427,4cyclictest0-21swapper/123:10:151
2951062993426,4cyclictest0-21swapper/120:10:261
2951059993426,4cyclictest0-21swapper/019:15:290
2951059993424,7cyclictest3001722-21latency_hist21:35:010
2951071993324,6cyclictest0-21swapper/323:35:003
2951071993323,7cyclictest3043926-21tune2fs23:35:153
2951071993323,6cyclictest0-21swapper/320:05:003
2951071993323,6cyclictest0-21swapper/319:35:233
2951071993322,7cyclictest2954738-21grep19:15:283
2951067993327,4cyclictest2962007-21kworker/u8:2+events_unbound19:42:132
2951067993325,4cyclictest0-21swapper/222:05:262
2951067993323,6cyclictest0-21swapper/219:15:012
2951067993323,6cyclictest0-21swapper/219:15:012
2951067993323,5cyclictest3044727-21grep23:35:252
2951067993322,7cyclictest0-21swapper/223:20:012
295106799331,4cyclictest131rcu_preempt22:35:112
2951062993325,4cyclictest0-21swapper/119:20:011
2951059993325,5cyclictest0-21swapper/023:55:230
2951059993323,6cyclictest0-21swapper/022:30:000
2951071993225,4cyclictest0-21swapper/321:50:013
2951071993224,4cyclictest2996568-21kthreadd21:20:013
295106799326,12cyclictest3058284-21mailstats00:15:262
2951067993225,5cyclictest2973822-21kworker/u8:1+events_unbound20:12:182
2951067993225,4cyclictest0-21swapper/222:10:252
2951067993222,7cyclictest3065687-21sshd00:38:062
2951067993222,7cyclictest2986740-21tune2fs20:50:162
295106799321,5cyclictest131rcu_preempt20:55:112
2951067993214,5cyclictest2958562-21kworker/u8:1+events_unbound19:36:152
2951062993223,5cyclictest0-21swapper/123:05:001
2951059993221,7cyclictest0-21swapper/022:10:250
2951071993123,6cyclictest3059411-21fschecks_count00:20:193
2951071993123,6cyclictest3059411-21fschecks_count00:20:183
2951071993123,4cyclictest0-21swapper/323:20:263
2951071993122,6cyclictest2958358-21unixbench_multi19:25:273
2951071993121,6cyclictest3015763-21munin-run22:15:013
2951067993121,7cyclictest3020429-21grep22:25:252
2951067993121,6cyclictest0-21swapper/220:40:002
2951067993121,6cyclictest0-21swapper/220:40:002
2951062993123,5cyclictest2981213-21auditctl20:35:011
2951062993122,6cyclictest2985910-21grep20:45:281
2951059993122,5cyclictest0-21swapper/019:15:000
2951059993122,5cyclictest0-21swapper/019:15:000
2951059993121,6cyclictest0-21swapper/020:35:260
2951059993121,6cyclictest0-21swapper/020:35:260
2951059993120,6cyclictest0-21swapper/000:20:000
2951071993023,4cyclictest2980793-21unixbench_singl20:30:243
2951071993022,5cyclictest0-21swapper/323:20:003
2951071993022,5cyclictest0-21swapper/321:10:003
2951071993022,5cyclictest0-21swapper/321:10:003
2951071993022,4cyclictest0-21swapper/300:29:593
2951071993020,7cyclictest2956978-21latency_hist19:25:013
295107199300,5cyclictest0-21swapper/320:05:133
2951067993023,5cyclictest2989405-21kworker/u8:2+events_unbound21:25:122
2951067993021,6cyclictest3018727-21grep22:20:262
2951067993021,6cyclictest3018727-21grep22:20:262
2951062993022,4cyclictest0-21swapper/123:30:161
2951062993021,5cyclictest0-21swapper/100:15:181
2951059993023,4cyclictest0-21swapper/022:40:010
295105999301,26cyclictest0-21swapper/022:15:120
2951071992919,7cyclictest0-21swapper/300:00:013
2951071992919,6cyclictest0-21swapper/321:25:243
2951071992917,7cyclictest3001251-21grep21:30:293
2951067992921,4cyclictest0-21swapper/223:50:242
2951067992920,5cyclictest3046448-21grep23:40:252
2951067992918,8cyclictest0-21swapper/219:20:262
2951062992922,3cyclictest0-21swapper/120:20:001
2951062992921,4cyclictest0-21swapper/122:20:001
2951062992920,7cyclictest3064147-21cut00:35:001
2951062992919,7cyclictest0-21swapper/100:15:001
2951071992820,4cyclictest0-21swapper/321:20:283
2951071992819,6cyclictest3017037-21unixbench_singl22:15:253
2951067992821,4cyclictest0-21swapper/220:30:142
2951067992820,4cyclictest0-21swapper/223:45:272
2951067992819,5cyclictest0-21swapper/219:15:172
2951062992820,4cyclictest0-21swapper/121:55:241
2951062992819,6cyclictest0-21swapper/120:40:011
2951062992819,6cyclictest0-21swapper/120:40:001
2951062992819,5cyclictest0-21swapper/122:12:321
2951062992817,7cyclictest0-21swapper/119:35:241
2951059992819,5cyclictest0-21swapper/020:40:260
2951059992812,13cyclictest0-21swapper/020:50:160
2951071992720,5cyclictest3031518-21cron23:00:013
2951071992720,4cyclictest0-21swapper/322:00:263
2951071992719,5cyclictest3057261-21kworker/u8:1+events_unbound00:35:273
2951071992719,4cyclictest0-21swapper/323:50:013
2951071992719,4cyclictest0-21swapper/323:00:253
2951071992719,4cyclictest0-21swapper/320:50:163
2951071992719,4cyclictest0-21swapper/320:10:253
2951071992717,7cyclictest0-21swapper/322:40:013
295106799273,4cyclictest30430132unixbench_multi23:30:262
2951067992721,4cyclictest3053557-21kworker/u8:0+events_unbound00:04:422
2951067992721,3cyclictest0-21swapper/223:25:252
2951067992721,3cyclictest0-21swapper/223:25:252
2951067992720,4cyclictest3008538-21kworker/u8:2+events_unbound21:55:192
2951067992719,5cyclictest0-21swapper/222:30:152
2951062992719,4cyclictest0-21swapper/121:20:001
2951062992718,5cyclictest0-21swapper/120:55:021
2951062992718,5cyclictest0-21swapper/100:38:071
2951062992717,6cyclictest0-21swapper/119:27:101
2951062992716,7cyclictest0-21swapper/119:10:171
2951062992716,7cyclictest0-21swapper/119:10:161
2951059992720,4cyclictest0-21swapper/020:10:260
2951059992720,4cyclictest0-21swapper/019:50:260
2951059992719,5cyclictest1-21systemd00:38:070
2951059992719,5cyclictest0-21swapper/020:30:000
2951059992719,5cyclictest0-21swapper/020:30:000
2951059992718,6cyclictest0-21swapper/021:00:020
2951059992716,7cyclictest204-21dbus-daemon21:52:280
2951071992620,3cyclictest0-21swapper/300:05:003
2951071992619,4cyclictest2982919-21sendmail20:40:013
2951071992619,4cyclictest2982919-21sendmail20:40:013
2951071992619,4cyclictest0-21swapper/322:25:253
2951071992618,5cyclictest0-21swapper/320:30:013
2951071992618,5cyclictest0-21swapper/320:30:003
2951067992620,4cyclictest3031145-21kworker/u8:2+events_unbound22:57:382
2951067992620,3cyclictest0-21swapper/220:15:252
2951067992618,4cyclictest0-21swapper/220:45:282
2951067992617,7cyclictest2965231-21unixbench_singl19:45:242
2951067992612,10cyclictest204-21dbus-daemon00:32:522
2951062992619,4cyclictest0-21swapper/122:55:261
2951062992619,4cyclictest0-21swapper/120:25:241
2951062992619,4cyclictest0-21swapper/120:25:231
2951062992618,5cyclictest3053557-21kworker/u8:0+events_unbound00:07:511
2951062992618,5cyclictest0-21swapper/122:00:271
2951062992617,5cyclictest3060312-21grep00:20:281
2951062992617,5cyclictest3060312-21grep00:20:281
2951062992617,5cyclictest0-21swapper/120:55:251
2951062992614,8cyclictest0-21swapper/100:27:521
2951059992619,4cyclictest13550irq/42-30be0000.ethernet20:20:010
2951059992618,5cyclictest0-21swapper/021:45:010
2951059992618,4cyclictest0-21swapper/021:15:290
2951059992617,5cyclictest3062007-21grep00:25:240
2951059992617,5cyclictest0-21swapper/022:57:450
2951071992517,5cyclictest3012106-21kworker/u8:0+events_unbound22:05:163
2951071992513,5cyclictest3048568-21kworker/u8:1+events_unbound23:50:263
2951071992511,10cyclictest391ktimers/321:40:143
2951067992519,4cyclictest3012106-21kworker/u8:0+events_unbound22:03:192
2951067992518,5cyclictest3053557-21kworker/u8:0+events_unbound00:10:182
2951067992518,5cyclictest3029504-21kworker/u8:1+events_unbound23:00:412
2951062992519,3cyclictest0-21swapper/121:05:001
2951062992519,3cyclictest0-21swapper/121:05:001
2951062992516,6cyclictest0-21swapper/123:40:171
2951059992517,4cyclictest0-21swapper/023:00:160
2951059992514,6cyclictest0-21swapper/000:32:520
295105999251,20cyclictest0-21swapper/023:20:570
295107199244,4cyclictest131rcu_preempt20:20:143
2951071992417,4cyclictest0-21swapper/319:55:263
2951071992417,4cyclictest0-21swapper/300:30:153
2951071992417,3cyclictest0-21swapper/323:10:213
2951071992416,6cyclictest391ktimers/300:10:173
2951071992413,8cyclictest2963055-21ntpq19:40:223
2951067992418,3cyclictest0-21swapper/221:50:262
2951067992418,3cyclictest0-21swapper/221:12:222
2951067992418,3cyclictest0-21swapper/221:12:222
2951067992418,3cyclictest0-21swapper/200:10:012
2951067992417,5cyclictest2972099-21kworker/u8:0+events_unbound20:06:172
2951067992417,4cyclictest0-21swapper/221:05:272
2951067992417,4cyclictest0-21swapper/221:05:272
2951067992416,5cyclictest0-21swapper/221:45:272
2951067992415,6cyclictest311ktimers/221:20:272
2951067992415,4cyclictest0-21swapper/223:05:262
2951062992419,3cyclictest2951052-21cyclictest21:05:131
2951062992419,3cyclictest2951052-21cyclictest21:05:121
2951062992416,5cyclictest2975575-21kworker/u8:2+events_unbound20:22:181
2951062992416,4cyclictest0-21swapper/122:20:241
2951062992416,4cyclictest0-21swapper/122:20:241
295105999248,3cyclictest2964238-21cpu19:45:140
2951059992417,5cyclictest178-21systemd-udevd23:30:390
2951059992417,4cyclictest13850irq/36-mmc122:45:000
295105999241,5cyclictest2961544-21switchtime19:35:220
2951059992414,7cyclictest3046042-21grep23:40:220
295105999241,19cyclictest0-21swapper/023:53:320
295105999241,19cyclictest0-21swapper/022:30:050
295105999241,19cyclictest0-21swapper/020:03:050
295105999240,20cyclictest0-21swapper/019:43:230
2951071992317,3cyclictest0-21swapper/300:05:263
2951071992316,3cyclictest0-21swapper/319:50:013
2951071992315,6cyclictest2982586-21kworker/u8:0+events_unbound21:00:133
2951071992315,6cyclictest2982586-21kworker/u8:0+events_unbound21:00:133
2951071992312,8cyclictest3026556-21df_inode22:45:163
295106799237,3cyclictest0-21swapper/219:25:062
2951067992318,3cyclictest3002127-21/usr/sbin/munin21:35:152
2951067992317,3cyclictest0-21swapper/219:55:172
2951067992315,6cyclictest311ktimers/223:10:122
2951067992315,4cyclictest0-21swapper/221:40:152
2951062992317,3cyclictest0-21swapper/123:15:231
2951062992315,5cyclictest3024016-21grep22:35:231
2951062992314,6cyclictest0-21swapper/120:00:271
2951062992314,6cyclictest0-21swapper/119:55:251
2951062992313,8cyclictest2951052-21cyclictest19:50:121
2951059992316,3cyclictest0-21swapper/023:07:350
2951059992315,5cyclictest2955659-21tune2fs19:20:180
295105999231,20cyclictest0-21swapper/021:35:030
295105999231,19cyclictest2959514-21meminfo19:30:210
295105999231,18cyclictest0-21swapper/023:46:180
295105999231,18cyclictest0-21swapper/023:19:140
295105999230,19cyclictest0-21swapper/000:24:260
295105999230,19cyclictest0-21swapper/000:24:250
2951071992216,3cyclictest0-21swapper/320:50:003
2951071992214,5cyclictest391ktimers/323:05:173
2951062992216,3cyclictest0-21swapper/119:30:171
2951062992214,5cyclictest3020420-21unixbench_multi22:25:261
2951062992214,4cyclictest3041315-21grep23:25:251
2951062992214,4cyclictest3041315-21grep23:25:251
295105999221,9cyclictest3010993-21df_inode22:00:160
2951059992216,3cyclictest30409042sleep023:25:230
2951059992216,3cyclictest30409042sleep023:25:230
2951059992215,5cyclictest0-21swapper/000:05:190
2951059992215,3cyclictest0-21swapper/021:10:080
2951059992215,3cyclictest0-21swapper/021:10:070
2951059992215,3cyclictest0-21swapper/021:05:060
2951059992215,3cyclictest0-21swapper/021:05:060
2951059992214,5cyclictest0-21swapper/022:45:270
295105999221,3cyclictest0-21swapper/021:23:140
295105999221,19cyclictest0-21swapper/000:01:300
2951067992115,4cyclictest3017280-21kworker/u8:0+events_unbound22:19:432
2951062992115,3cyclictest0-21swapper/121:45:191
2951062992115,3cyclictest0-21swapper/121:25:111
2951062992115,3cyclictest0-21swapper/121:10:221
2951062992115,3cyclictest0-21swapper/121:10:221
2951062992114,5cyclictest0-21swapper/121:50:211
2951062992114,4cyclictest3003845-21/usr/sbin/munin21:40:201
2951059992115,2cyclictest0-21swapper/022:06:380
2951062992014,3cyclictest0-21swapper/123:50:221
2951062992013,4cyclictest3040061-21sh23:25:001
295106299198,6cyclictest2998378-21cut21:25:001
2951062991913,3cyclictest3033473-21/usr/sbin/munin23:05:161
2951062991913,3cyclictest2964378-21fschecks_time19:45:151
2951062991812,3cyclictest0-21swapper/120:40:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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