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2026-09-05 - 00:25

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 Fri Sep 04, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
380008027839,33sleep10-21swapper/107:08:551
379936727853,16sleep30-21swapper/307:05:223
379987126344,14sleep00-21swapper/007:06:120
379929726343,14sleep20-21swapper/207:05:212
38585902550,4sleep30-21swapper/309:55:013
38850932510,4sleep00-21swapper/011:10:160
38031012500,1sleep30-21swapper/307:15:143
38483182330,2sleep33842834-21kworker/u8:109:25:023
3800304993210,6cyclictest3853466-21ls09:40:002
380030499313,8cyclictest3914604-21apt12:35:102
380030499311,11cyclictest3822133-21apt08:10:122
3800304993110,6cyclictest3855033-21sshd09:44:412
380030499308,7cyclictest883-21dbus-daemon09:35:002
380030499299,4cyclictest3860469-21latency_hist10:00:012
380030499298,6cyclictest3847416-21ntp_states09:20:182
380030499292,6cyclictest3884208-21python311:05:192
3800304992910,4cyclictest3866465-21ntp_kernel_pll_10:15:202
3800306992823,3cyclictest42-21ksoftirqd/311:20:003
380030499289,3cyclictest978-21snmpd07:38:362
380030499288,6cyclictest3849267-21sensors_temp09:25:192
380030499288,5cyclictest3843096-21date09:10:012
380030499287,6cyclictest3820623-21expr08:05:122
380030499287,5cyclictest3806188-21cat07:25:122
380030499287,4cyclictest3911269-21grep12:25:132
380030499287,4cyclictest3911269-21grep12:25:132
380030499287,4cyclictest0-21swapper/209:10:212
380030499286,6cyclictest3856230-21expr09:45:202
380030499286,5cyclictest3885448-21df11:10:172
380030499282,5cyclictest0-21swapper/210:05:102
380030499282,4cyclictest0-21swapper/209:00:112
380030499282,4cyclictest0-21swapper/207:15:112
380030499278,4cyclictest3864661-21needreboot10:10:222
380030499277,6cyclictest3829238-21cpuspeed_turbos08:30:122
380030499271,9cyclictest3890278-21apt11:25:112
380030499271,9cyclictest3816663-21apt07:55:092
380030499268,3cyclictest3820251-21latency_hist08:05:012
380030499266,5cyclictest3838327-21expr08:55:112
380030499261,8cyclictest82332-21update-manager07:33:372
3800304992611,2cyclictest3832556-21cpu08:40:122
3800304992611,2cyclictest3832556-21cpu08:40:112
380030499260,10cyclictest3877798-21cat10:50:012
380030499259,4cyclictest978-21snmpd10:39:032
380030499257,4cyclictest3812940-21munin-plugin-st07:45:002
380030499252,6cyclictest2156-21gnome-shell08:35:092
380030499251,9cyclictest3857942-21python309:50:222
380030499250,8cyclictest3868964-21idleruntime-cro10:25:002
380030499250,8cyclictest3815411-21irqstats07:50:162
380030499250,19cyclictest0-21swapper/212:10:472
380030499249,2cyclictest3895217-21munin-plugin-st11:40:002
380030499243,7cyclictest3890016-21munin-run11:25:002
380030499243,7cyclictest3890016-21munin-run11:25:002
380030499241,9cyclictest3892594-21/usr/sbin/munin11:30:212
380030499241,8cyclictest3905003-21python312:05:202
380030499241,8cyclictest3828193-21python308:25:202
380030499241,5cyclictest3901536-21python311:55:222
380030499240,7cyclictest3860705-21tr10:00:122
139099240,20rtkit-daemon1788620-21WebKitWebProces07:22:370
380030499238,4cyclictest34-21ksoftirqd/208:25:012
380030499231,7cyclictest3870690-21dump-pmu-power10:30:002
380030499231,7cyclictest3801971-21perf07:15:002
380030499231,6cyclictest3907658-21apt12:15:112
380030499231,6cyclictest3877621-21apt-get10:50:042
380030499230,8cyclictest3874425-21apt10:40:112
139099230,3rtkit-daemon1389-21rtkit-daemon10:48:300
38488062220,4chrt0-21swapper/009:25:140
380030699227,13cyclictest3816596-21ls07:55:003
3800306992220,1cyclictest0-21swapper/308:40:073
3800306992220,1cyclictest0-21swapper/308:40:073
3800306992219,2cyclictest3056-21PK-Backend11:43:053
3800306992218,3cyclictest42-21ksoftirqd/310:20:003
3800306992218,3cyclictest0-21swapper/308:25:133
3800306992216,4cyclictest42-21ksoftirqd/309:50:003
3800306992214,6cyclictest3849351-21/usr/sbin/munin09:25:203
380030699220,21cyclictest3056-21PK-Backend08:14:183
380030499224,6cyclictest0-21swapper/208:50:112
3800304992219,2cyclictest0-21swapper/208:17:212
380030499220,21cyclictest0-21swapper/212:02:432
3800300992220,1cyclictest0-21swapper/112:01:521
3800300992219,2cyclictest3905984-21cpuspeed_turbos12:10:111
3800300992212,8cyclictest3872413-21cron10:35:001
3800300992210,11cyclictest3835784-21unin-run08:50:001
3800297992220,1cyclictest0-21swapper/012:12:420
3800297992220,1cyclictest0-21swapper/011:58:230
3800297992220,1cyclictest0-21swapper/010:13:320
3800297992220,1cyclictest0-21swapper/009:48:310
3800297992220,1cyclictest0-21swapper/008:31:330
3800297992219,2cyclictest3056-21PK-Backend09:20:460
3800297992216,4cyclictest2156-21gnome-shell07:31:090
3800297992214,5cyclictest3819529-21python308:00:200
380029799220,21cyclictest0-21swapper/010:04:330
139099220,4rtkit-daemon1389-21rtkit-daemon11:07:510
139099220,4rtkit-daemon1389-21rtkit-daemon09:53:060
139099220,4rtkit-daemon1389-21rtkit-daemon09:37:250
139099220,4rtkit-daemon1389-21rtkit-daemon08:16:580
3800306992119,1cyclictest3056-21PK-Backend11:27:583
3800306992119,1cyclictest3056-21PK-Backend11:00:263
3800306992119,1cyclictest3056-21PK-Backend10:42:353
3800306992119,1cyclictest3056-21PK-Backend10:39:043
3800306992119,1cyclictest3056-21PK-Backend10:27:553
3800306992119,1cyclictest3056-21PK-Backend08:52:373
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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