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2026-04-12 - 16:57

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 100 highest latencies:
System rackeslot6s.osadl.org (updated Sun Apr 12, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3885337991411,21cyclictest3888109-21kworker/u8:1+ext4-rsv-conversion08:00:021
3885337991087,13cyclictest3894004-21kworker/u8:3+ext4-rsv-conversion08:55:011
3885337991072,26cyclictest3875533-21kworker/u8:0+ext4-rsv-conversion07:30:021
38853369910291,9cyclictest0-21swapper/011:40:010
3885336996448,7cyclictest0-21swapper/008:20:010
388533699627,13cyclictest23850irq/422-mmc107:35:010
3885339995547,5cyclictest3926386-21munin-plugin-st11:09:592
3885339995512,14cyclictest0-21swapper/208:10:012
3885336995446,4cyclictest167350irq/118-8000000.ethernet-tx009:45:230
3885336995345,4cyclictest167350irq/118-8000000.ethernet-tx009:20:000
3885339995239,8cyclictest3934936-21apt-get12:00:012
388533799524,14cyclictest0-21swapper/109:20:011
3885337995126,18cyclictest22-21rcuc/107:40:011
3885336995132,16cyclictest3938807-21grep12:20:180
388533999501,15cyclictest3900025-21apt-get08:35:022
388533999501,15cyclictest3900025-21apt-get08:35:022
3885336995043,4cyclictest3926335-21unixbench_singl11:05:260
3885339994931,7cyclictest0-21swapper/208:15:272
3885339994927,13cyclictest3912241-21apt-get09:45:142
3885337994932,11cyclictest0-21swapper/112:15:211
3885339994839,5cyclictest3905193-21munin-plugin-st09:05:002
388533999481,21cyclictest0-21swapper/211:35:022
3885337994835,8cyclictest0-21swapper/109:25:291
3885337994831,12cyclictest3911186-21munin-plugin-st09:40:001
3885336994838,6cyclictest20850irq/208-8000000.ethernet11:20:280
3885339994720,13cyclictest0-21swapper/207:55:112
3885339994719,16cyclictest0-21swapper/207:15:102
3885336994740,4cyclictest167350irq/118-8000000.ethernet-tx012:10:040
388533999465,15cyclictest0-21swapper/209:40:022
3885339994619,17cyclictest0-21swapper/211:25:002
388533999461,20cyclictest0-21swapper/210:30:002
388533999461,16cyclictest0-21swapper/207:25:002
3885337994634,8cyclictest0-21swapper/109:00:001
3885336994639,4cyclictest167350irq/118-8000000.ethernet-tx008:30:230
3885336994639,4cyclictest167350irq/118-8000000.ethernet-tx008:30:220
3885336994638,4cyclictest167350irq/118-8000000.ethernet-tx008:40:000
3885339994538,4cyclictest3921315-21sendmail10:40:012
3885339994527,9cyclictest0-21swapper/212:25:262
3885339994523,14cyclictest3908196-21sh09:20:212
388533699451,42cyclictest0-21swapper/012:15:100
3885339994435,6cyclictest3909626-21latency_hist09:30:022
3885339994428,11cyclictest3902015-21apt-get08:45:162
3885339994421,12cyclictest0-21swapper/212:20:142
3885339994419,12cyclictest0-21swapper/211:45:112
3885337994427,13cyclictest0-21swapper/108:00:291
3885339994333,5cyclictest0-21swapper/207:50:012
3885339994332,5cyclictest3890609-21grep07:35:302
3885339994316,16cyclictest0-21swapper/208:50:102
388533999431,30cyclictest3901792-21kworker/u8:1+rpciod09:09:252
3885337994330,9cyclictest0-21swapper/109:30:281
3885337994328,10cyclictest0-21swapper/112:35:301
3885337994326,8cyclictest0-21swapper/111:00:291
3885336994336,4cyclictest167350irq/118-8000000.ethernet-tx008:50:240
3885336994331,8cyclictest274-21systemd-journal12:00:240
388533699432,38cyclictest0-21swapper/011:25:100
388533699431,4cyclictest3887751-21irqstats07:20:230
388533999426,8cyclictest274-21systemd-journal10:55:012
3885339994226,9cyclictest3931752-21/usr/sbin/munin11:40:302
3885339994225,10cyclictest3906231-21apt-get09:10:142
3885339994220,11cyclictest0-21swapper/208:35:122
3885339994215,15cyclictest311ktimers/210:25:102
3885336994233,4cyclictest167350irq/118-8000000.ethernet-tx011:15:020
3885336994223,17cyclictest0-21swapper/008:10:170
388533699421,4cyclictest0-21swapper/010:50:000
388533699421,4cyclictest0-21swapper/010:49:590
388533699421,4cyclictest0-21swapper/008:00:010
388533699421,37cyclictest3914012-21ssh09:55:190
388533699421,36cyclictest0-21swapper/008:45:010
3885339994136,3cyclictest311ktimers/210:55:012
3885339994127,8cyclictest0-21swapper/208:59:592
3885339994125,11cyclictest3927220-21apt-get11:15:062
3885339994124,14cyclictest0-21swapper/209:15:122
3885339994122,14cyclictest0-21swapper/208:25:112
3885339994122,12cyclictest0-21swapper/211:35:142
3885339994119,14cyclictest3897984-21ps08:20:262
3885339994118,15cyclictest3901509-21phc2sys08:40:262
3885339994118,12cyclictest0-21swapper/212:05:142
3885337994133,5cyclictest3939331-21munin-plugin-st12:25:001
3885337994133,4cyclictest3913710-21cron09:54:591
3885337994131,6cyclictest0-21swapper/108:30:301
3885337994131,6cyclictest0-21swapper/108:30:301
3885337994124,10cyclictest0-21swapper/112:10:271
3885336994134,4cyclictest0-21swapper/010:25:240
3885336994128,8cyclictest3886060-21grep07:10:280
3885336994128,8cyclictest3886060-21grep07:10:280
3885336994127,11cyclictest0-21swapper/012:30:250
388533699412,5cyclictest3941512-21/usr/sbin/munin12:35:260
388533699411,37cyclictest3921163-21awk10:35:290
3885339994028,8cyclictest3913076-21munin-node09:50:112
3885339994020,13cyclictest3888635-21/usr/sbin/munin07:25:242
3885339994019,9cyclictest0-21swapper/210:05:112
3885339994019,9cyclictest0-21swapper/210:05:112
3885339994017,12cyclictest0-21swapper/210:00:142
3885339994016,12cyclictest0-21swapper/211:10:122
3885339994016,12cyclictest0-21swapper/211:10:112
3885337994032,4cyclictest3923850-21munin-plugin-st10:55:001
3885337994032,4cyclictest3900003-21kworker/u8:1+ext4-rsv-conversion08:35:061
3885337994028,8cyclictest0-21swapper/111:25:271
3885337994026,8cyclictest0-21swapper/112:05:271
3885337994026,10cyclictest0-21swapper/111:05:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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