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2026-07-21 - 15:55

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 Tue Jul 21, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
367342199991,2cyclictest0-21swapper/020:10:020
367342299869,18cyclictest3689155-21/usr/sbin/munin20:40:191
3673425997365,4cyclictest3710234-21kworker/u8:4-ext4-rsv-conversion23:30:012
3673421997214,49cyclictest0-21swapper/023:00:230
3673421997136,30cyclictest167350irq/118-8000000.ethernet-tx000:30:300
3673421997034,31cyclictest167350irq/118-8000000.ethernet-tx023:55:160
3673421997034,31cyclictest167350irq/118-8000000.ethernet-tx023:55:160
3673421996931,30cyclictest20850irq/208-8000000.ethernet19:10:170
3673421996931,30cyclictest20850irq/208-8000000.ethernet19:10:170
367342199692,5cyclictest3699431-21/usr/sbin/munin21:40:180
367342199652,6cyclictest3684986-21df_inode20:15:190
3673421996329,30cyclictest20850irq/208-8000000.ethernet21:30:180
3673421996327,32cyclictest20650irq/252-8000000.ethernet23:20:320
3673421996232,26cyclictest20650irq/252-8000000.ethernet23:50:010
3673421996145,9cyclictest3715209-21grep23:10:300
3673421996028,28cyclictest20850irq/208-8000000.ethernet19:30:310
367342199592,4cyclictest3691136-21meminfo20:50:250
3673421995924,31cyclictest20650irq/252-8000000.ethernet22:20:180
367342199591,5cyclictest3703985-21meminfo22:05:230
3673421995833,21cyclictest0-21swapper/000:10:300
367342199581,50cyclictest0-21swapper/021:00:220
3673421995734,19cyclictest167350irq/118-8000000.ethernet-tx021:15:180
3673421995732,21cyclictest0-21swapper/023:35:280
367342199572,4cyclictest3687526-21df_inode20:30:160
367342199572,4cyclictest3687526-21df_inode20:30:160
367342199572,3cyclictest0-21swapper/019:20:000
367342199571,10cyclictest3688539-21/usr/sbin/munin20:35:240
3673422995648,5cyclictest22-21rcuc/122:00:001
367342199563,48cyclictest3694308-21tune2fs21:10:190
367342199563,3cyclictest0-21swapper/019:45:280
3673421995529,21cyclictest0-21swapper/000:20:310
367342199552,6cyclictest3682332-21latency_hist20:00:000
3673421995521,31cyclictest3701133-21/usr/sbin/munin21:50:200
367342199551,7cyclictest3718108-21sed23:30:020
367342199551,4cyclictest3678236-21diskstats19:35:190
367342199551,4cyclictest3678236-21diskstats19:35:190
367342199551,48cyclictest0-21swapper/000:20:000
367342199546,12cyclictest14-21rcu_preempt19:10:020
3673421995446,4cyclictest0-21swapper/019:25:130
3673421995428,22cyclictest20650irq/252-8000000.ethernet21:35:120
3673421995425,25cyclictest20650irq/252-8000000.ethernet23:40:230
3673421995425,25cyclictest20650irq/252-8000000.ethernet20:45:000
367342199542,4cyclictest3686686-21df_inode20:25:180
367342199541,46cyclictest0-21swapper/023:10:010
367342599531,31cyclictest0-21swapper/223:15:002
3673422995345,5cyclictest3684721-21munin-plugin-st20:15:001
3673421995325,25cyclictest3705122-21sed22:10:290
3673421995325,25cyclictest3705122-21sed22:10:290
3673421995325,25cyclictest0-21swapper/023:50:300
367342199532,4cyclictest3712241-21ssh22:55:200
367342199531,4cyclictest3679243-21if_err_eth119:40:230
367342299522,10cyclictest0-21swapper/120:05:011
3673422995218,27cyclictest3699103-21unixbench_singl21:35:321
367342299521,11cyclictest0-21swapper/120:50:021
367342199522,6cyclictest3693436-21/usr/sbin/munin21:05:180
3673421995223,25cyclictest20650irq/252-8000000.ethernet22:25:270
367342199521,48cyclictest3696662-21latency_hist21:25:000
3673425995137,9cyclictest3692326-21sendmail21:00:002
3673422995141,6cyclictest3676224-21grep19:20:291
3673422995140,5cyclictest0-21swapper/119:20:001
367342199513,5cyclictest0-21swapper/021:55:180
3673421995133,14cyclictest20850irq/208-8000000.ethernet22:55:010
3673421995133,14cyclictest20850irq/208-8000000.ethernet22:55:010
3673421995130,15cyclictest0-21swapper/022:00:220
367342199512,5cyclictest3697448-21grep21:25:290
3673421995123,24cyclictest0-21swapper/022:45:300
3673421995122,25cyclictest3690604-21head20:45:280
367342199512,10cyclictest3723839-21unixbench_multi00:00:280
367342199511,9cyclictest3708415-21/usr/sbin/munin22:30:280
367342199511,10cyclictest3718433-21/usr/sbin/munin23:30:250
367342199511,10cyclictest3718433-21/usr/sbin/munin23:30:240
367342299504,31cyclictest3673426-21dpkg19:10:001
367342199506,4cyclictest3729803-21grep00:35:290
367342199506,4cyclictest3729803-21grep00:35:290
3673421995031,15cyclictest20650irq/252-8000000.ethernet21:00:010
3673421995030,17cyclictest20850irq/208-8000000.ethernet19:20:160
367342199502,9cyclictest3686429-21latency_hist20:25:010
367342199502,8cyclictest3682984-21head20:00:290
3673421995028,20cyclictest20850irq/208-8000000.ethernet23:15:260
3673421995028,19cyclictest20850irq/208-8000000.ethernet00:05:160
367342199501,9cyclictest3680702-21/usr/sbin/munin19:50:120
367342199501,9cyclictest3680702-21/usr/sbin/munin19:50:120
367342199501,42cyclictest3710367-21latency_hist22:45:020
3673425994941,4cyclictest3722242-21munin-plugin-st23:54:592
367342199493,42cyclictest3709170-21ptp4l-jitter22:35:280
3673421994916,28cyclictest0-21swapper/021:45:290
3673421994913,30cyclictest0-21swapper/000:25:200
3673425994833,12cyclictest14-21rcu_preempt23:40:012
3673422994820,15cyclictest231ktimers/121:45:021
367342199481,7cyclictest3684194-21fschecks_count20:10:200
367342199481,3cyclictest3705431-21df_inode22:15:180
3673422994740,4cyclictest3710242-21munin-run22:45:001
3673425994637,5cyclictest3724779-21munin-plugin-st00:10:002
3673425994631,10cyclictest0-21swapper/220:00:002
3673425994528,12cyclictest311ktimers/200:15:152
3673422994537,4cyclictest3682176-21cron20:00:001
3673422994536,5cyclictest3685566-21apt20:20:011
3673425994432,7cyclictest3705055-21grep22:10:302
3673425994432,7cyclictest3705055-21grep22:10:302
3673422994437,4cyclictest0-21swapper/100:05:271
3673422994432,8cyclictest0-21swapper/120:55:301
3673422994411,28cyclictest3727096-21cut00:20:301
3673425994333,5cyclictest3697369-21grep21:25:302
3673425994328,7cyclictest0-21swapper/200:30:292
3673425994323,12cyclictest0-21swapper/220:15:292
3673422994336,4cyclictest3718777-21munin-plugin-st23:35:001
3673422994336,4cyclictest3718777-21munin-plugin-st23:34:591
3673422994327,10cyclictest0-21swapper/119:35:311
3673422994327,10cyclictest0-21swapper/119:35:301
367342299431,9cyclictest0-21swapper/123:15:011
367342599427,27cyclictest0-21swapper/222:25:262
3673425994232,6cyclictest3727224-21tail00:20:322
3673422994218,12cyclictest231ktimers/123:00:011
367342299421,4cyclictest0-21swapper/123:25:011
367342299411,27cyclictest0-21swapper/123:50:241
3673425994023,10cyclictest0-21swapper/219:40:002
3673425994023,10cyclictest0-21swapper/219:40:002
3673422994030,6cyclictest3701583-21grep21:50:301
3673422994029,7cyclictest3679547-21grep19:40:291
3673422994027,8cyclictest0-21swapper/122:25:291
3673425993929,7cyclictest3675921-21kernelversion19:20:242
3673425993925,9cyclictest0-21swapper/222:40:182
367342599391,32cyclictest0-21swapper/220:05:302
367342599391,31cyclictest3690577-21unixbench_singl20:45:292
3673422993930,6cyclictest3695791-21munin-plugin-st21:20:001
3673422993927,9cyclictest0-21swapper/121:45:291
3673422993927,7cyclictest1283-21cron19:35:001
367342299391,30cyclictest3694563-21cut21:10:251
367342299391,2cyclictest0-21swapper/119:55:011
367342299391,2cyclictest0-21swapper/119:55:011
3673425993830,4cyclictest167550irq/134-8000000.ethernet-tx220:20:302
3673425993830,3cyclictest0-21swapper/222:10:012
3673425993829,5cyclictest0-21swapper/222:00:302
3673422993823,9cyclictest0-21swapper/119:45:291
3673422993822,8cyclictest0-21swapper/123:30:001
367342299381,31cyclictest0-21swapper/100:00:251
3673425993726,6cyclictest0-21swapper/222:15:282
3673422993726,7cyclictest3726355-21grep00:15:291
367342299371,29cyclictest0-21swapper/122:10:291
367342299371,29cyclictest0-21swapper/122:10:291
367342599364,23cyclictest311ktimers/221:00:182
367342599362,13cyclictest3674404-21munin-node19:15:022
367342599362,13cyclictest3674404-21munin-node19:15:022
367342599361,29cyclictest0-21swapper/221:30:242
367342599361,29cyclictest0-21swapper/219:50:312
367342599361,29cyclictest0-21swapper/219:50:312
3673422993625,6cyclictest3693374-21/usr/sbin/munin21:05:301
3673422993625,6cyclictest0-21swapper/119:15:011
3673422993623,8cyclictest0-21swapper/121:30:281
3673422993622,9cyclictest0-21swapper/122:15:201
367342299361,5cyclictest3728049-21unixbench_multi00:25:291
3673425993528,4cyclictest167550irq/134-8000000.ethernet-tx222:35:232
3673425993528,4cyclictest167550irq/134-8000000.ethernet-tx220:00:272
3673425993527,4cyclictest14-21rcu_preempt21:55:212
3673425993527,4cyclictest0-21swapper/200:35:182
3673425993527,4cyclictest0-21swapper/200:35:172
3673425993525,5cyclictest0-21swapper/221:50:292
3673425993525,5cyclictest0-21swapper/219:10:012
3673425993522,8cyclictest0-21swapper/221:15:192
3673425993521,8cyclictest0-21swapper/221:35:322
367342599351,3cyclictest0-21swapper/220:35:022
367342599351,3cyclictest0-21swapper/220:35:022
367342599351,28cyclictest0-21swapper/200:00:002
367342599351,28cyclictest0-21swapper/200:00:002
367342599351,27cyclictest0-21swapper/223:00:302
367342599350,29cyclictest0-21swapper/220:35:312
367342299351,29cyclictest0-21swapper/123:15:271
367342299351,28cyclictest0-21swapper/120:30:141
367342299351,28cyclictest0-21swapper/120:30:141
3673425993426,4cyclictest0-21swapper/222:50:302
3673425993426,4cyclictest0-21swapper/222:50:302
367342599341,3cyclictest3712652-21unixbench_multi22:55:312
367342299341,4cyclictest0-21swapper/122:25:011
367342299341,27cyclictest0-21swapper/100:10:301
3673425993323,5cyclictest0-21swapper/223:30:182
3673425993323,5cyclictest0-21swapper/223:30:182
3673425993322,8cyclictest0-21swapper/219:34:592
3673425993322,7cyclictest3680400-21grep19:45:302
3673425993321,3cyclictest0-21swapper/222:45:202
3673425993318,7cyclictest0-21swapper/223:45:312
3673422993324,5cyclictest0-21swapper/120:20:291
3673422993323,6cyclictest0-21swapper/120:35:311
3673422993322,7cyclictest0-21swapper/123:55:281
3673422993322,7cyclictest0-21swapper/123:55:281
3673422993321,9cyclictest0-21swapper/121:24:591
3673422993320,9cyclictest0-21swapper/121:25:281
367342299331,26cyclictest0-21swapper/100:35:261
367342299331,26cyclictest0-21swapper/100:35:261
3673425993225,4cyclictest167550irq/134-8000000.ethernet-tx219:25:262
3673425993224,4cyclictest0-21swapper/220:25:162
3673425993222,5cyclictest0-21swapper/220:10:202
3673425993221,6cyclictest0-21swapper/220:50:302
3673422993225,4cyclictest167450irq/126-8000000.ethernet-tx121:00:111
3673422993223,5cyclictest0-21swapper/123:00:321
3673422993222,5cyclictest3709316-21head22:35:281
3673422993218,10cyclictest0-21swapper/122:55:011
3673422993218,10cyclictest0-21swapper/122:55:011
3673425993124,4cyclictest167550irq/134-8000000.ethernet-tx221:05:132
3673425993122,6cyclictest0-21swapper/219:15:042
3673425993122,4cyclictest0-21swapper/220:40:202
367342299315,20cyclictest22-21rcuc/122:05:181
3673422993118,7cyclictest0-21swapper/120:50:201
367342299311,27cyclictest3710866-21ptp4l-jitter22:45:281
367342599308,12cyclictest3694212-21/usr/sbin/munin21:10:182
3673425993024,4cyclictest0-21swapper/221:20:242
3673425993021,5cyclictest0-21swapper/200:00:282
3673425993020,7cyclictest0-21swapper/221:45:282
3673425993019,6cyclictest0-21swapper/223:05:222
367342599301,3cyclictest3720245-21ptp4l23:40:252
3673422993020,6cyclictest3674208-21grep19:10:281
3673422993020,5cyclictest1660-21snmpd23:05:121
367342599295,5cyclictest0-21swapper/223:25:022
3673425992923,4cyclictest311ktimers/200:10:242
367342599291,26cyclictest0-21swapper/222:30:132
3673422992923,4cyclictest0-21swapper/123:45:151
3673422992914,9cyclictest3676557-21diskstats19:25:211
3673425992814,9cyclictest0-21swapper/221:45:012
3673422992818,7cyclictest3728956-21grep00:30:301
3673422992814,7cyclictest231ktimers/123:40:181
3673422992712,7cyclictest0-21swapper/120:30:011
367342599268,5cyclictest167550irq/134-8000000.ethernet-tx200:26:212
3673425992620,4cyclictest274-21systemd-journal22:22:272
3673425992611,9cyclictest0-21swapper/223:15:222
3673422992618,5cyclictest0-21swapper/120:10:011
3673422992618,4cyclictest0-21swapper/122:30:211
3673425992516,7cyclictest3679027-21sshd19:40:142
3673422992519,3cyclictest0-21swapper/122:00:291
3673422992415,6cyclictest0-21swapper/123:40:001
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