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2026-06-13 - 07:53

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 Sat Jun 13, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3671950996022,3cyclictest3708378-21/usr/sbin/munin22:40:250
3671950995910,8cyclictest3715597-21grep23:20:280
3671952995549,4cyclictest231ktimers/121:10:011
3671952995321,17cyclictest3711435-21/usr/sbin/munin23:00:181
367195099533,45cyclictest3697638-21sed21:35:300
3671955995238,10cyclictest3711221-21sendmail23:00:002
3671952995243,5cyclictest3684109-21munin-plugin-st20:20:001
3671952995241,8cyclictest3684963-21munin-plugin-st20:25:011
3671952995230,15cyclictest231ktimers/121:25:101
3671952995113,19cyclictest3701305-21/usr/sbin/munin22:00:181
3671950995142,5cyclictest3698567-21munin-plugin-st21:45:000
3671955995037,9cyclictest1283-21cron20:15:002
3671950995044,4cyclictest0-21swapper/023:30:010
3671955994929,14cyclictest0-21swapper/200:15:282
3671952994927,12cyclictest0-21swapper/123:25:281
367195099499,38cyclictest0-21swapper/023:10:230
3671950994941,4cyclictest167350irq/118-8000000.ethernet-tx022:00:240
3671950994928,12cyclictest0-21swapper/021:50:000
367195099492,40cyclictest3712005-21unixbench_singl23:00:270
3671950994922,24cyclictest3721084-21/usr/sbin/munin23:55:220
3671950994913,3cyclictest3702205-21df22:05:160
3671952994836,9cyclictest3707850-21sendmail22:40:001
3671950994840,5cyclictest167350irq/118-8000000.ethernet-tx022:20:240
3671955994739,4cyclictest3715634-21munin-plugin-st23:25:002
3671952994717,16cyclictest231ktimers/123:45:111
367195099474,39cyclictest3686261-21uname20:30:230
3671950994739,4cyclictest167350irq/118-8000000.ethernet-tx019:30:040
3671952994633,9cyclictest0-21swapper/120:00:281
3671952994630,13cyclictest231ktimers/123:30:141
3671952994627,13cyclictest231ktimers/100:20:111
3671950994639,4cyclictest167350irq/118-8000000.ethernet-tx020:20:240
3671950994639,4cyclictest167350irq/118-8000000.ethernet-tx019:45:180
3671950994630,10cyclictest0-21swapper/019:30:000
367195599453,15cyclictest14-21rcu_preempt20:00:012
3671952994526,9cyclictest0-21swapper/121:10:281
3671952994525,11cyclictest0-21swapper/123:05:291
367195299452,4cyclictest0-21swapper/121:55:011
367195299452,4cyclictest0-21swapper/121:55:011
3671952994520,8cyclictest3709738-21/usr/sbin/munin22:50:181
367195099453,35cyclictest0-21swapper/023:00:010
3671950994532,9cyclictest0-21swapper/021:20:280
3671950994529,11cyclictest0-21swapper/020:50:280
3671950994516,3cyclictest3690887-21apt-config21:00:000
3671950994516,3cyclictest3690887-21apt-config21:00:000
3671950994513,3cyclictest3687209-21grep20:35:260
3671955994426,10cyclictest0-21swapper/223:20:022
367195599441,10cyclictest0-21swapper/223:30:002
3671952994433,6cyclictest0-21swapper/123:15:271
3671952994431,8cyclictest0-21swapper/121:30:271
3671952994430,10cyclictest0-21swapper/120:40:291
3671952994428,8cyclictest0-21swapper/100:30:291
3671950994437,4cyclictest0-21swapper/022:10:210
3671950994431,9cyclictest0-21swapper/000:35:270
367195099442,8cyclictest3724095-21grep00:10:280
3671950994426,13cyclictest3681785-21apt-get20:05:160
3671950994426,13cyclictest3681785-21apt-get20:05:160
3671950994422,20cyclictest0-21swapper/000:15:140
3671955994336,4cyclictest3695188-21munin-plugin-st21:25:002
3671955994323,15cyclictest311ktimers/220:40:112
3671955994313,11cyclictest3716668-21/usr/sbin/munin23:30:182
3671952994332,7cyclictest0-21swapper/119:35:281
3671952994331,8cyclictest0-21swapper/121:45:281
3671952994329,9cyclictest0-21swapper/100:10:281
3671950994327,11cyclictest3672906-21unixbench_multi19:15:020
367195099432,4cyclictest3679545-21meminfo19:50:240
367195599421,34cyclictest3721415-21unixbench_multi23:55:282
3671952994235,4cyclictest3679045-21munin-plugin-st19:50:001
3671952994233,5cyclictest3690850-21cron21:00:001
3671952994233,5cyclictest3690850-21cron21:00:001
3671952994229,8cyclictest0-21swapper/120:30:291
3671952994227,7cyclictest0-21swapper/119:20:261
3671952994227,7cyclictest0-21swapper/119:20:261
3671952994222,10cyclictest0-21swapper/122:25:281
367195099425,32cyclictest3681526-21grep20:00:280
3671950994235,4cyclictest0-21swapper/000:00:330
367195099423,11cyclictest0-21swapper/023:45:020
3671950994230,6cyclictest0-21swapper/021:25:250
367195099422,5cyclictest3687769-21diskstats20:40:180
367195099422,37cyclictest0-21swapper/021:05:130
3671950994215,3cyclictest3706661-21memory22:30:220
3671950994215,3cyclictest3706661-21memory22:30:220
3671950994214,25cyclictest3714041-21munin-node23:15:100
367195099421,39cyclictest0-21swapper/023:50:250
367195099421,39cyclictest0-21swapper/023:50:240
367195099421,39cyclictest0-21swapper/022:45:250
3671955994123,12cyclictest0-21swapper/219:40:262
3671952994128,9cyclictest0-21swapper/123:35:281
3671952994127,9cyclictest0-21swapper/120:45:261
3671952994127,9cyclictest0-21swapper/120:45:261
3671952994127,9cyclictest0-21swapper/119:55:291
367195299411,5cyclictest0-21swapper/122:50:011
367195099419,7cyclictest3683765-21memory20:15:240
367195099418,30cyclictest0-21swapper/000:30:160
3671950994135,3cyclictest0-21swapper/021:30:250
3671950994132,6cyclictest0-21swapper/023:45:140
3671950994130,7cyclictest3726362-21/usr/sbin/munin00:25:250
367195099412,4cyclictest3673112-21users19:15:050
3671950994114,3cyclictest3691234-21diskstats21:00:170
367195099411,38cyclictest0-21swapper/000:20:190
3671950994113,26cyclictest3704437-21users22:15:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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