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2025-07-07 - 02:16

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 Jul 06, 2025 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16204359912042,10cyclictest0-21swapper/007:55:020
1620435999793,2cyclictest0-21swapper/009:00:010
1620437999569,8cyclictest1624061-21apt-get07:30:011
162043999883,16cyclictest1649190-21kworker/u8:3+ext4-rsv-conversion10:00:012
162043999883,16cyclictest1649190-21kworker/u8:3+ext4-rsv-conversion10:00:012
1620435997116,7cyclictest20950irq/209-8000000.ethernet12:00:170
162043799695,27cyclictest1659429-21/usr/sbin/munin10:55:201
162043599652,4cyclictest1645315-21grep09:30:270
1620435996427,33cyclictest1669462-21munin-plugin-st11:55:000
1620435996419,37cyclictest0-21swapper/011:10:310
1620439996320,14cyclictest1672194-21/usr/sbin/munin12:10:212
1620437996219,16cyclictest1632807-21/usr/sbin/munin08:20:171
162043599623,4cyclictest0-21swapper/010:15:300
1620435996227,31cyclictest0-21swapper/008:10:290
162043599621,2cyclictest0-21swapper/012:35:000
1620439996043,10cyclictest0-21swapper/211:25:322
162043799601,31cyclictest0-21swapper/110:05:021
162043799601,31cyclictest0-21swapper/110:05:021
1620435996012,39cyclictest0-21swapper/010:25:290
1620435996012,39cyclictest0-21swapper/010:25:280
162043599591,47cyclictest0-21swapper/008:15:140
1620435995810,6cyclictest0-21swapper/008:40:280
1620439995750,4cyclictest1653061-21sendmail10:20:012
1620435995725,25cyclictest1643482-21grep09:20:330
1620435995723,28cyclictest0-21swapper/011:55:230
162043599571,51cyclictest1672080-21latency_hist12:10:010
162043599571,14cyclictest1661024-21apt-key11:05:010
162043599562,4cyclictest1657734-21diskstats10:45:200
1620435995617,5cyclictest1661388-21dropbear11:05:210
162043599561,50cyclictest0-21swapper/007:10:200
162043599561,48cyclictest1647674-21cut09:45:280
1620435995527,24cyclictest0-21swapper/010:55:180
1620435995517,34cyclictest0-21swapper/007:20:300
162043599551,52cyclictest0-21swapper/010:20:240
162043599551,25cyclictest0-21swapper/008:25:120
162043599542,7cyclictest1649848-21df10:00:170
162043599542,7cyclictest1649848-21df10:00:170
162043599542,47cyclictest1624941-21unixbench_singl07:30:300
162043599541,7cyclictest1624153-21apt-key07:30:000
1620435995414,36cyclictest0-21swapper/009:05:010
1620435995413,7cyclictest0-21swapper/008:50:010
1620435995324,24cyclictest0-21swapper/009:30:010
1620435995316,5cyclictest1655855-21sort10:35:010
1620435995311,8cyclictest0-21swapper/012:10:230
162043999529,10cyclictest1651273-21apt-get10:10:002
162043799526,15cyclictest1669658-21/usr/sbin/munin11:55:201
1620437995229,11cyclictest1658066-21/usr/sbin/munin10:45:281
162043599526,7cyclictest0-21swapper/010:00:010
162043599526,7cyclictest0-21swapper/010:00:000
162043599525,8cyclictest0-21swapper/011:50:010
162043599522,5cyclictest1642733-21munin-run09:20:000
1620435995218,30cyclictest0-21swapper/011:35:010
1620435995217,31cyclictest0-21swapper/011:20:280
1620435995215,33cyclictest0-21swapper/007:45:290
1620435995213,5cyclictest1663541-21latency_hist11:20:010
162043599521,12cyclictest1641405-21grep09:10:200
1620437995142,6cyclictest0-21swapper/112:05:011
1620437995133,12cyclictest0-21swapper/109:20:331
1620437995130,14cyclictest1644143-21/usr/sbin/munin09:25:281
1620437995130,11cyclictest0-21swapper/110:35:111
1620437995128,13cyclictest0-21swapper/108:45:161
162043599512,9cyclictest1626191-21grep07:40:230
162043599512,14cyclictest1667466-21tail11:40:270
162043599512,12cyclictest1666407-21cut11:35:210
1620435995115,10cyclictest0-21swapper/009:35:270
1620435995113,2cyclictest0-21swapper/010:05:160
162043799507,11cyclictest0-21swapper/107:20:021
1620435995023,23cyclictest25450irq/423-mmc209:50:240
162043599502,14cyclictest1659153-21sed10:50:300
1620435995018,7cyclictest1635956-21cron08:40:000
1620435995016,4cyclictest1652198-21cron10:15:000
1620435995016,4cyclictest0-21swapper/007:50:240
162043599501,42cyclictest0-21swapper/007:35:170
162043999499,23cyclictest311ktimers/210:20:022
1620439994932,11cyclictest0-21swapper/210:55:002
1620437994930,11cyclictest1676091-21/usr/sbin/munin12:30:281
1620437994930,11cyclictest1625487-21/usr/sbin/munin07:35:251
1620437994929,13cyclictest1646757-21/usr/sbin/munin09:40:271
1620437994929,10cyclictest1668888-21/usr/sbin/munin11:50:221
1620437994928,9cyclictest0-21swapper/110:10:141
1620437994928,11cyclictest0-21swapper/107:40:191
1620437994927,13cyclictest1666348-21/usr/sbin/munin11:35:191
162043599497,8cyclictest1630032-21grep08:00:290
1620435994924,22cyclictest131ktimers/009:40:310
1620435994920,5cyclictest0-21swapper/011:25:190
1620435994919,25cyclictest0-21swapper/012:35:210
1620435994916,4cyclictest0-21swapper/008:30:220
1620435994912,5cyclictest0-21swapper/007:20:010
1620439994837,6cyclictest1635070-21unixbench_singl08:30:292
1620439994834,9cyclictest1662692-21cron11:15:002
1620439994830,13cyclictest311ktimers/209:00:142
1620437994841,3cyclictest1629486-21/usr/sbin/munin08:00:161
1620437994831,9cyclictest1628070-21/usr/sbin/munin07:50:271
1620437994830,9cyclictest1662506-21/usr/sbin/munin11:10:301
1620437994830,13cyclictest1628786-21/usr/sbin/munin07:55:251
1620437994829,10cyclictest1632310-21/usr/sbin/munin08:15:301
1620437994828,13cyclictest1657389-21/usr/sbin/munin10:40:291
1620437994828,13cyclictest1657389-21/usr/sbin/munin10:40:291
1620437994824,12cyclictest0-21swapper/109:05:021
162043599486,9cyclictest0-21swapper/008:20:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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