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2026-09-19 - 11:04

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 792 highest latencies:
System rackbslot5s.osadl.org (updated Sat Sep 19, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1975844995937,5cyclictest2086810-21cut00:30:002
1975838995624,7cyclictest2062513-21sendmail23:20:000
1975849994941,5cyclictest2000671-21munin-run20:20:013
1975849994938,8cyclictest2045258-21kworker/u8:0+events_unbound22:40:153
1975849994937,8cyclictest2053958-21cron22:55:003
1975849994937,8cyclictest2053958-21cron22:55:003
1975838994839,6cyclictest2022652-21grep21:20:240
1975849994536,5cyclictest2052273-21latency_hist22:50:003
1975849994430,10cyclictest391ktimers/322:35:113
1975844994336,4cyclictest2052661-21fschecks_count22:50:152
1975844994336,4cyclictest2052661-21fschecks_count22:50:142
1975844994335,6cyclictest2022655-21unixbench_singl21:20:242
1975838994332,7cyclictest2076361-21cut00:00:000
1975849994235,5cyclictest2088201-21kworker/u8:1+events_unbound00:33:333
1975849994230,6cyclictest0-21swapper/321:40:253
1975844994234,4cyclictest0-21swapper/223:00:002
1975844994234,4cyclictest0-21swapper/220:00:002
1975844994229,10cyclictest311ktimers/220:20:122
1975841994234,5cyclictest2029459-21unixbench_singl21:40:251
1975849994031,6cyclictest2072481-21grep23:45:243
1975844994030,7cyclictest2033015-21grep21:50:242
1975849993931,4cyclictest0-21swapper/320:20:173
1975841993920,11cyclictest2024745-21kworker/u8:1+events_unbound21:29:561
1975849993827,8cyclictest391ktimers/320:35:133
1975849993827,8cyclictest391ktimers/320:35:133
1975844993828,7cyclictest438-21cron19:20:012
1975844993828,7cyclictest438-21cron19:20:012
1975844993824,11cyclictest311ktimers/223:35:132
1975841993826,9cyclictest231ktimers/122:45:101
1975849993728,6cyclictest0-21swapper/321:35:003
1975844993729,5cyclictest0-21swapper/219:45:242
1975844993729,4cyclictest0-21swapper/223:00:152
1975841993727,7cyclictest2068854-21grep23:35:261
1975849993629,5cyclictest1983128-21kworker/u8:2+events_unbound19:30:593
1975849993629,5cyclictest1983128-21kworker/u8:2+events_unbound19:30:593
1975844993629,4cyclictest0-21swapper/200:20:002
1975844993629,3cyclictest0-21swapper/220:50:002
1975844993628,5cyclictest0-21swapper/223:59:592
1975849993524,7cyclictest2017461-21grep21:05:253
1975844993528,4cyclictest0-21swapper/219:15:002
1975844993525,6cyclictest2065439-21unixbench_multi23:25:242
1975841993527,5cyclictest1990221-21cron19:50:011
1975838993528,3cyclictest0-21swapper/023:10:160
1975838993527,5cyclictest0-21swapper/022:00:000
1975849993425,5cyclictest0-21swapper/322:55:243
1975844993425,6cyclictest0-21swapper/220:40:012
1975844993425,6cyclictest0-21swapper/220:40:002
1975841993426,4cyclictest0-21swapper/123:41:401
1975841993426,4cyclictest0-21swapper/120:41:041
1975841993425,7cyclictest1991977-21apt-key19:55:011
1975841993424,7cyclictest2090199-21sh00:40:011
1975841993423,8cyclictest1998961-21debian-sa120:15:021
1975838993425,5cyclictest0-21swapper/022:25:000
1975838993424,6cyclictest0-21swapper/021:40:000
1975838993424,6cyclictest0-21swapper/021:00:240
1975838993423,7cyclictest438-21cron19:30:000
1975838993421,10cyclictest2052278-21munin-plugin-st22:50:000
1975849993325,4cyclictest0-21swapper/323:30:263
1975849993323,6cyclictest0-21swapper/321:20:163
1975849993321,8cyclictest1977750-21apt-key19:15:023
1975844993326,5cyclictest2051172-21kworker/u8:3+events_unbound23:06:322
1975844993322,7cyclictest2061206-21grep23:15:152
1975841993325,5cyclictest0-21swapper/119:15:011
1975841993324,6cyclictest2074643-21sh23:55:011
1975841993324,6cyclictest2074643-21sh23:55:001
1975838993325,4cyclictest0-21swapper/020:15:010
1975838993323,6cyclictest0-21swapper/022:10:000
197584999322,5cyclictest131rcu_preempt22:30:113
1975849993224,5cyclictest2021365-21sendmail21:20:013
1975849993222,7cyclictest2062018-21grep23:15:233
1975849993220,8cyclictest0-21swapper/321:55:023
1975844993225,4cyclictest0-21swapper/222:25:252
1975844993225,4cyclictest0-21swapper/220:15:152
1975844993224,4cyclictest0-21swapper/219:25:262
1975844993224,4cyclictest0-21swapper/200:35:272
1975844993219,10cyclictest311ktimers/219:50:102
1975844993218,11cyclictest311ktimers/223:30:122
1975841993225,4cyclictest0-21swapper/120:00:161
197584199321,6cyclictest20458172cut22:30:161
1975841993216,3cyclictest131rcu_preempt00:30:101
1975838993224,4cyclictest0-21swapper/021:45:260
1975838993224,4cyclictest0-21swapper/000:40:000
1975838993223,5cyclictest0-21swapper/020:20:000
1975838993222,6cyclictest0-21swapper/019:15:020
1975838993222,6cyclictest0-21swapper/000:25:000
1975838993222,6cyclictest0-21swapper/000:24:590
1975849993125,4cyclictest2034816-21kworker/u8:0+events_unbound22:21:233
1975849993124,4cyclictest0-21swapper/300:00:003
1975849993122,6cyclictest0-21swapper/323:00:263
1975844993123,6cyclictest0-21swapper/220:35:012
1975844993123,4cyclictest0-21swapper/219:30:152
1975844993123,4cyclictest0-21swapper/219:30:152
1975844993123,4cyclictest0-21swapper/200:20:242
1975844993123,4cyclictest0-21swapper/200:20:242
1975844993122,6cyclictest0-21swapper/222:20:002
1975841993125,3cyclictest0-21swapper/123:05:151
1975841993125,3cyclictest0-21swapper/119:15:241
1975841993125,3cyclictest0-21swapper/119:15:241
1975841993122,6cyclictest2061209-21fschecks_time23:15:141
1975838993123,4cyclictest0-21swapper/021:15:160
1975838993119,8cyclictest2046843-21sshd22:31:250
1975849993023,3cyclictest0-21swapper/320:55:263
1975849993021,5cyclictest0-21swapper/321:35:173
1975849993020,5cyclictest0-21swapper/322:20:013
1975849993019,7cyclictest0-21swapper/320:25:253
1975844993022,5cyclictest1998575-21kworker/u8:0+events_unbound20:56:062
1975844993022,4cyclictest0-21swapper/220:50:152
1975841993023,4cyclictest0-21swapper/121:30:251
1975841993023,4cyclictest0-21swapper/100:00:001
1975841993020,7cyclictest2038198-21grep22:05:271
1975841993020,6cyclictest0-21swapper/121:10:021
1975838993022,4cyclictest0-21swapper/023:00:000
1975838993021,6cyclictest0-21swapper/020:35:010
1975838993021,6cyclictest0-21swapper/000:29:590
1975838993020,6cyclictest0-21swapper/020:40:240
1975844992922,4cyclictest0-21swapper/222:40:272
1975844992922,4cyclictest0-21swapper/222:35:252
1975844992922,3cyclictest0-21swapper/223:41:412
1975844992920,5cyclictest2017968-21grep21:10:012
197584199298,4cyclictest19992022egrep20:15:131
1975841992922,4cyclictest0-21swapper/123:25:011
1975841992921,5cyclictest0-21swapper/119:20:251
1975838992923,3cyclictest2012819-21kthreadd20:55:010
1975838992921,4cyclictest0-21swapper/022:50:250
1975838992921,4cyclictest0-21swapper/022:50:250
1975838992919,6cyclictest0-21swapper/020:20:260
197583899290,3cyclictest0-21swapper/022:25:120
197584999280,8cyclictest0-21swapper/322:25:113
1975844992822,3cyclictest0-21swapper/221:00:202
1975844992822,3cyclictest0-21swapper/220:10:022
1975844992820,5cyclictest2020868-21unixbench_multi21:15:242
1975841992821,4cyclictest0-21swapper/120:35:271
1975841992821,4cyclictest0-21swapper/120:35:261
1975841992821,4cyclictest0-21swapper/120:25:241
1975838992822,3cyclictest0-21swapper/023:35:260
1975838992821,3cyclictest0-21swapper/021:45:010
1975838992818,6cyclictest0-21swapper/022:40:280
197583899281,5cyclictest1978067-21ntpq19:15:020
197583899281,5cyclictest1978067-21ntpq19:15:020
1975849992720,4cyclictest2077651-21head00:00:253
1975849992720,4cyclictest0-21swapper/321:45:263
1975849992720,3cyclictest0-21swapper/323:40:023
1975849992720,3cyclictest0-21swapper/321:26:103
1975849992718,6cyclictest1994296-21grep20:00:163
1975849992718,5cyclictest0-21swapper/319:40:003
1975849992718,5cyclictest0-21swapper/319:40:003
1975849992715,9cyclictest164-21systemd-journal23:50:403
1975849992715,9cyclictest164-21systemd-journal23:50:403
1975844992718,7cyclictest311ktimers/221:10:112
1975841992722,3cyclictest2041774-21sh22:17:001
1975841992720,3cyclictest0-21swapper/100:03:131
1975841992716,7cyclictest0-21swapper/122:40:271
1975838992720,4cyclictest0-21swapper/019:30:250
1975838992720,4cyclictest0-21swapper/019:30:240
1975838992718,6cyclictest0-21swapper/023:25:240
1975838992718,6cyclictest0-21swapper/020:00:250
1975838992718,5cyclictest13550irq/42-30be0000.ethernet19:55:020
1975838992718,5cyclictest0-21swapper/019:55:240
197584999269,5cyclictest2014192-21kworker/u8:3+events_unbound21:00:173
1975849992619,5cyclictest1998575-21kworker/u8:0+events_unbound20:46:193
1975849992619,4cyclictest0-21swapper/322:00:003
1975849992619,4cyclictest0-21swapper/319:55:023
1975849992618,5cyclictest1995512-21kworker/u8:2+events_unbound20:15:013
1975849992618,4cyclictest0-21swapper/300:10:243
1975849992617,5cyclictest0-21swapper/323:45:003
1975849992616,7cyclictest1981248-21grep19:20:243
1975844992618,5cyclictest0-21swapper/219:35:192
1975844992618,5cyclictest0-21swapper/219:35:192
1975844992617,7cyclictest2045258-21kworker/u8:0+events_unbound22:48:562
1975841992619,4cyclictest0-21swapper/120:45:261
1975841992619,3cyclictest0-21swapper/119:25:271
1975841992614,4cyclictest1590890-1kworker/1:1H+kblockd23:50:001
1975838992620,4cyclictest208-21systemd-logind20:57:400
1975838992619,3cyclictest0-21swapper/023:20:170
1975838992618,5cyclictest0-21swapper/020:45:270
1975838992618,4cyclictest0-21swapper/019:35:180
1975838992618,4cyclictest0-21swapper/019:35:180
1975849992519,4cyclictest1977139-21kworker/u8:0+events_unbound19:26:353
1975849992518,4cyclictest0-21swapper/323:10:253
1975849992517,4cyclictest0-21swapper/322:10:263
1975849992515,6cyclictest0-21swapper/300:15:263
1975844992519,3cyclictest0-21swapper/223:20:262
1975844992519,3cyclictest0-21swapper/219:20:212
1975844992511,11cyclictest311ktimers/221:55:112
1975841992519,4cyclictest2021354-21sendmail21:20:001
1975841992519,4cyclictest2011533-21fschecks_time20:50:151
1975841992519,3cyclictest0-21swapper/121:55:241
1975841992517,4cyclictest0-21swapper/120:20:251
1975841992515,7cyclictest2048871-21sendmail22:40:001
1975841992514,8cyclictest1987169-21df_inode19:40:141
1975838992520,2cyclictest0-21swapper/021:30:180
1975838992519,4cyclictest2083217-21gpgv00:20:000
1975838992519,3cyclictest0-21swapper/021:10:010
1975838992518,4cyclictest2072957-21munin-plugin-st23:50:000
1975838992518,3cyclictest0-21swapper/022:40:010
1975838992517,5cyclictest0-21swapper/019:45:000
1975838992511,10cyclictest121ktimers/021:25:100
1975849992418,3cyclictest0-21swapper/320:40:243
1975849992417,5cyclictest1998575-21kworker/u8:0+events_unbound20:50:053
1975849992417,5cyclictest1988483-21kworker/u8:1+events_unbound20:06:413
1975849992413,7cyclictest164-21systemd-journal22:02:403
1975849992413,7cyclictest1-21systemd20:31:023
1975849992412,8cyclictest2065928-21basename23:30:003
1975844992417,5cyclictest1986726-21kworker/u8:2+events_unbound19:43:192
1975844992417,4cyclictest0-21swapper/223:45:182
1975844992417,4cyclictest0-21swapper/222:10:162
1975844992416,5cyclictest0-21swapper/222:30:242
1975844992416,5cyclictest0-21swapper/221:45:012
1975844992415,7cyclictest2038561-21seq22:09:222
1975844992415,6cyclictest2003863-21seq20:27:222
1975844992414,7cyclictest2059492-21cut23:10:172
1975844992410,12cyclictest2027238-21tr21:35:222
1975841992418,3cyclictest0-21swapper/122:50:201
1975841992418,3cyclictest0-21swapper/122:50:191
1975841992417,4cyclictest1996858-21grep20:05:251
1975841992417,4cyclictest0-21swapper/121:10:241
1975841992417,3cyclictest0-21swapper/121:50:001
1975841992416,5cyclictest0-21swapper/120:00:001
1975841992415,6cyclictest2079770-21sh00:09:591
1975841992415,5cyclictest2082186-21cat00:15:211
1975838992417,5cyclictest208-21systemd-logind21:50:400
1975838992414,7cyclictest2019182-21grep21:10:250
1975838992414,6cyclictest0-21swapper/022:02:410
1975849992316,4cyclictest2062884-21fschecks_count23:20:163
197584499239,4cyclictest0-21swapper/222:20:222
197584499234,9cyclictest0-21swapper/220:13:252
1975844992317,3cyclictest0-21swapper/223:50:162
1975844992317,3cyclictest0-21swapper/223:50:162
1975844992317,3cyclictest0-21swapper/221:30:222
1975844992314,6cyclictest0-21swapper/220:40:172
1975841992317,3cyclictest0-21swapper/100:25:181
1975841992316,4cyclictest0-21swapper/123:30:201
1975841992316,4cyclictest0-21swapper/121:00:251
1975841992314,5cyclictest2055263-21grep22:55:251
1975838992316,5cyclictest178-21systemd-udevd23:40:400
1975838992316,5cyclictest0-21swapper/023:10:000
1975838992316,4cyclictest2003625-21unixbench_multi20:25:240
1975838992315,3cyclictest0-21swapper/000:00:240
1975838992314,6cyclictest13550irq/42-30be0000.ethernet23:00:160
197583899231,18cyclictest0-21swapper/023:52:090
197583899231,18cyclictest0-21swapper/023:52:080
197583899231,18cyclictest0-21swapper/020:08:340
197583899230,19cyclictest0-21swapper/023:32:230
197583899230,19cyclictest0-21swapper/022:16:520
197584999222,14cyclictest1979991-21munin-plugin-st19:20:003
197584999222,14cyclictest1979991-21munin-plugin-st19:20:003
1975849992215,4cyclictest2085470-21fschecks_count00:25:163
1975849992215,4cyclictest0-21swapper/319:55:253
1975849992213,7cyclictest2089939-21kworker/u8:2+events_unbound00:37:113
1975844992215,4cyclictest2023844-21ntpq21:25:192
1975844992214,5cyclictest0-21swapper/200:05:172
1975844992213,6cyclictest2087017-21date00:30:012
1975844992211,7cyclictest204-21dbus-daemon21:46:172
1975841992216,4cyclictest2029729-21kworker/u8:1+events_unbound21:52:541
1975841992216,4cyclictest2027694-21grep21:35:281
1975841992216,3cyclictest0-21swapper/123:25:191
1975841992214,5cyclictest0-21swapper/119:35:131
1975841992214,5cyclictest0-21swapper/119:35:131
1975841992214,5cyclictest0-21swapper/119:30:151
1975841992214,5cyclictest0-21swapper/119:30:151
1975841992212,7cyclictest2022598-21grep21:20:241
1975838992215,3cyclictest0-21swapper/000:05:240
1975838992213,6cyclictest1980668-21cat19:20:170
1975838992212,7cyclictest2080995-21grep00:10:240
1975838992212,7cyclictest2006485-21basename20:35:170
1975838992212,7cyclictest2006485-21basename20:35:170
1975838992212,7cyclictest1989269-21cat19:45:190
197583899221,19cyclictest0-21swapper/000:30:400
1975849992115,4cyclictest2057073-21kworker/u8:1+events_unbound23:06:223
1975849992115,3cyclictest0-21swapper/321:10:133
1975849992115,3cyclictest0-21swapper/319:40:153
1975849992113,5cyclictest391ktimers/319:46:433
1975844992115,3cyclictest0-21swapper/200:00:222
1975844992114,4cyclictest0-21swapper/200:10:152
1975844992112,6cyclictest2036120-21cut22:00:222
1975841992115,3cyclictest0-21swapper/123:10:251
1975841992115,3cyclictest0-21swapper/122:20:221
1975841992114,5cyclictest231ktimers/122:25:131
197584199210,12cyclictest0-21swapper/122:13:081
197583899211,18cyclictest0-21swapper/022:12:030
197584999201,4cyclictest131rcu_preempt22:05:173
1975849992012,5cyclictest2079335-21head00:05:253
1975844992015,3cyclictest1994090-21/usr/sbin/munin20:00:202
1975841992015,3cyclictest2014719-21latency_hist21:00:011
1975841992012,5cyclictest0-21swapper/122:00:151
1975841992010,7cyclictest2056499-21awk23:00:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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