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2026-08-20 - 20:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rackcslot7s.osadl.org (updated Thu Aug 20, 2026 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
376322621470,4sleep10-21swapper/109:40:171
376693921370,4sleep20-21swapper/209:50:192
371029021100,1sleep20-21swapper/207:10:162
378451021060,3sleep03784502-21ntp_kernel_pll_10:40:170
372115521010,1sleep30-21swapper/307:40:163
370897427638,13sleep30-21swapper/307:05:363
139099750,63rtkit-daemon0-21swapper/207:05:252
370854826940,22sleep00-21swapper/007:05:200
370904926545,14sleep10-21swapper/107:06:331
37829542490,3chrt0-21swapper/310:35:233
37961222480,3sleep20-21swapper/211:15:122
38228302410,4sleep00-21swapper/012:30:130
370945899391,27cyclictest3813967-21/usr/sbin/munin12:05:173
370945899391,27cyclictest3813967-21/usr/sbin/munin12:05:173
370945899377,21cyclictest42-21ksoftirqd/311:44:043
370945899360,21cyclictest3756908-21taskset09:20:403
370945899350,21cyclictest0-21swapper/308:13:273
370945899350,20cyclictest3795883-21chrt11:15:053
370945899341,19cyclictest3816717-21latency_hist12:15:003
370945899321,19cyclictest0-21swapper/310:17:023
370945899321,16cyclictest0-21swapper/310:20:233
370945899321,16cyclictest0-21swapper/308:45:193
370945899320,19cyclictest3768468-21cstates09:55:143
370945899320,18cyclictest3800774-21taskset11:29:163
370945899320,18cyclictest3710845-21runrttasks07:11:403
3709450993214,4cyclictest13-21ksoftirqd/009:43:120
370945899310,17cyclictest3713163-21runrttasks07:17:533
3709450993115,4cyclictest13-21ksoftirqd/007:26:550
370945899301,27cyclictest3795843-21cat11:15:003
3709458993010,18cyclictest3770879-21sed10:00:213
370945899300,18cyclictest0-21swapper/309:03:123
370945899299,18cyclictest3764875-21ls09:45:143
370945899299,18cyclictest3740484-21ls08:35:173
370945899298,20cyclictest3725028-21sed07:50:183
3709458992910,17cyclictest3774271-21ls10:10:203
3709452992915,12cyclictest3722096-21unin-run07:45:011
370945899288,18cyclictest3757755-21expr09:25:133
370945899288,18cyclictest3750787-21cut09:05:133
370945899287,19cyclictest3754473-21basename09:15:143
370945899282,22cyclictest3810056-21apt11:55:103
370945899280,26cyclictest3806940-21df11:45:123
370945899280,26cyclictest3788955-21/usr/sbin/munin10:55:133
370945899280,26cyclictest3747504-21df_inode08:55:133
370945899277,19cyclictest3729768-21expr08:05:143
370945899277,18cyclictest3817570-21grep12:15:153
370945899277,18cyclictest3803299-21cat11:35:153
3709458992713,12cyclictest3771653-21apt10:05:123
3709458992710,15cyclictest3753795-21latency_hist09:15:003
370945899270,25cyclictest3812356-21sed12:00:163
370945899270,25cyclictest3759473-21cstates09:30:123
370945899270,15cyclictest3798047-21hddtemp_smartct11:20:153
3709450992712,4cyclictest13-21ksoftirqd/010:34:010
370945899269,15cyclictest3761157-21cpuspeed_turbos09:35:133
370945899268,16cyclictest436-20systemd-journal07:35:013
370945899267,17cyclictest436-20systemd-journal10:50:003
370945899267,17cyclictest3738570-21df_inode08:30:153
370945899265,19cyclictest3794035-21sed11:10:003
370945899261,23cyclictest3713586-21/usr/sbin/munin07:20:213
3709458992611,13cyclictest3820691-21/usr/sbin/munin12:25:133
3709458992610,14cyclictest978-21snmpd08:27:503
3709458992610,14cyclictest3781031-21ntp_kernel_pll_10:30:193
370945899260,24cyclictest3792257-21wc11:05:003
370945899260,24cyclictest3745408-21apt08:50:133
370945899260,14cyclictest3822836-21diskstats12:30:133
370945899256,17cyclictest436-20systemd-journal07:45:013
370945899255,18cyclictest3735022-21ls08:20:113
370945899252,20cyclictest3742795-21python308:40:223
370945899252,19cyclictest3801118-21apt11:30:113
370945899251,21cyclictest0-21swapper/310:50:113
370945899250,23cyclictest978-21snmpd12:38:363
370945899250,23cyclictest3718785-21/usr/sbin/munin07:35:153
370945899250,23cyclictest3715346-21apt07:25:123
139099250,3rtkit-daemon1389-21rtkit-daemon07:57:002
370945899247,15cyclictest0-21swapper/312:22:263
370945899245,17cyclictest3763107-21entropy09:40:143
370945899241,21cyclictest3808326-21apt11:50:123
3709458992410,13cyclictest978-21snmpd10:28:123
370945099249,4cyclictest13-21ksoftirqd/009:11:320
370945099248,4cyclictest13-21ksoftirqd/008:32:200
370945099243,11cyclictest13-21ksoftirqd/012:10:000
370945099243,11cyclictest13-21ksoftirqd/012:10:000
370945899236,15cyclictest3726240-21cat07:55:163
370945899235,16cyclictest3784766-21sort10:40:213
370945899231,6cyclictest3728138-21sed08:00:193
370945899230,21cyclictest3766718-21cat09:50:183
370945899230,21cyclictest3733521-21ls08:15:163
3709456992315,6cyclictest436-20systemd-journal12:32:342
370945699230,4cyclictest3713012-21chrt07:15:582
370945099234,5cyclictest13-21ksoftirqd/011:45:000
3709450992312,4cyclictest13-21ksoftirqd/011:06:290
3709450992312,4cyclictest13-21ksoftirqd/010:53:110
3709450992312,4cyclictest13-21ksoftirqd/010:29:480
3709450992312,4cyclictest13-21ksoftirqd/009:58:160
3709450992312,4cyclictest13-21ksoftirqd/008:52:560
3709450992312,4cyclictest13-21ksoftirqd/008:03:150
3709450992312,4cyclictest13-21ksoftirqd/007:33:010
3709450992311,3cyclictest13-21ksoftirqd/009:55:020
3709456992220,1cyclictest0-21swapper/211:41:212
3709456992220,1cyclictest0-21swapper/210:55:392
3709456992220,1cyclictest0-21swapper/208:55:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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