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2025-11-29 - 09:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Fri Nov 28, 2025 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
266806521170,0sleep1281rcuc/112:21:181
2354836995244,5cyclictest2550209-21latency_hist10:25:000
2354839995041,6cyclictest2634557-21latency_hist11:50:001
23736162490,3sleep20-21swapper/207:26:162
2354844994944,4cyclictest2381724-21kworker/u8:3+flush-8:008:36:232
2354844994735,9cyclictest282-21systemd-journal10:44:592
2354839994735,9cyclictest282-21systemd-journal10:56:331
2354836994737,8cyclictest2460079-21ntpq08:51:200
2354839994638,5cyclictest2490896-21/usr/sbin/munin09:26:181
2354836994635,8cyclictest2653486-21ntpq12:06:230
2354844994536,7cyclictest282-21systemd-journal07:55:002
2354839994528,6cyclictest282-21systemd-journal08:10:321
2354836994339,3cyclictest1519662-21kworker/u8:0+flush-8:007:16:280
2354836994336,5cyclictest2376501-21kworker/u8:2+flush-8:009:26:200
2354836994334,6cyclictest2669133-21latency_hist12:25:010
2354839994234,5cyclictest2579868-21latency_hist10:55:011
2354844994133,5cyclictest2679025-21apt-get12:35:002
2354844994133,5cyclictest2679025-21apt-get12:35:002
2354839994132,6cyclictest2678268-21ntpq12:31:281
2354839994132,6cyclictest2678268-21ntpq12:31:281
2354839994111,15cyclictest0-21swapper/108:51:071
235483699411,37cyclictest2684231-21true12:40:000
2354836994031,7cyclictest2405579-21ntpq07:56:180
2354839993931,6cyclictest2505446-21latency_hist09:40:011
2354839993928,8cyclictest2603915-21ntpq11:16:191
2354836993930,6cyclictest1519662-21kworker/u8:0+flush-8:007:31:110
2354836993928,8cyclictest2669712-21diskstats12:26:090
2354836993928,8cyclictest2669712-21diskstats12:26:090
2354844993833,4cyclictest2520488-21kworker/u8:0+flush-8:010:06:252
2354839993831,5cyclictest2396906-21apt-get07:51:081
2354836993833,4cyclictest2630505-21kworker/u8:0+events_unbound11:51:160
2354836993830,6cyclictest2395744-21ntpq07:46:220
2354836993827,9cyclictest2509535-21ntpq09:41:200
23500032383,9sleep20-21swapper/207:05:092
2354844993731,4cyclictest2359726-21turbostat.cron07:14:592
2354839993726,8cyclictest282-21systemd-journal07:23:331
2354836993730,5cyclictest2623754-21ntpq11:36:230
2354836993730,5cyclictest2386430-21apt-get07:40:010
2354839993627,6cyclictest282-21systemd-journal09:48:341
235483999357,9cyclictest0-21swapper/112:26:061
235483999357,9cyclictest0-21swapper/112:26:061
2354839993524,8cyclictest2480696-21latency_hist09:15:011
2354839993524,8cyclictest2480696-21latency_hist09:15:011
2354836993525,7cyclictest2629530-21latency_hist11:45:010
2354839993429,3cyclictest2531098-21irqcore10:06:151
2354839993425,7cyclictest2609746-21latency_hist11:25:011
2354836993428,4cyclictest2376501-21kworker/u8:2+flush-8:009:51:120
23543812343,9sleep10-21swapper/107:06:451
2354844993327,4cyclictest2376501-21kworker/u8:2+events_unbound10:01:212
2354839993325,5cyclictest2684201-21latency_hist12:40:011
2354836993326,5cyclictest2381724-21kworker/u8:3+flush-8:008:56:150
2354836993323,8cyclictest2381724-21kworker/u8:3+events_unbound09:01:280
235483699332,26cyclictest2340027-21kworker/0:1+events08:05:400
2354839993228,2cyclictest2443657-21kthreadcore08:36:141
2354839993223,7cyclictest2471132-21/usr/sbin/munin09:06:201
2354839993223,7cyclictest2471132-21/usr/sbin/munin09:06:201
235483699322,25cyclictest2490606-21kworker/0:0+events09:30:190
235483999313,15cyclictest2618734-21ntpq11:31:201
2354839993126,3cyclictest2536382-21kthreadcore10:11:161
2354839993124,5cyclictest2441153-21latency_hist08:35:011
2354839993124,5cyclictest2406414-21latency_hist08:00:011
2354839993122,7cyclictest2564207-21ntpq10:36:181
2354839993116,5cyclictest2579605-21kworker/u8:3+flush-8:011:50:041
2354836993124,5cyclictest282-21systemd-journal10:11:100
235483699312,28cyclictest2594946-21kworker/0:2+events11:59:400
2354836993119,9cyclictest2618750-21ntpq11:31:200
2354844993027,2cyclictest2381445-21cron07:35:002
2354844993025,4cyclictest2520488-21kworker/u8:0+flush-8:011:16:212
235483999309,10cyclictest0-21swapper/107:26:081
235483999306,12cyclictest2395803-21ntpq07:46:241
235483999303,16cyclictest2623799-21ntpq11:36:241
235483999303,15cyclictest2663382-21ntpq12:16:201
235483999303,15cyclictest2509603-21ntpq09:41:221
235483999302,17cyclictest2545372-21latency_hist10:20:011
2354839993020,8cyclictest2390759-21ntpq07:41:201
2354839993019,8cyclictest2426749-21diskstats08:21:121
2354836993022,6cyclictest2520488-21kworker/u8:0+events_unbound10:35:010
2354836993021,7cyclictest2504560-21ntpq09:36:210
235483699300,25cyclictest2490606-21kworker/0:0+events09:55:520
235483699300,25cyclictest2490606-21kworker/0:0+events09:45:160
2354844992924,4cyclictest2579605-21kworker/u8:3+flush-8:011:01:292
2354844992924,4cyclictest2376501-21kworker/u8:2+events_unbound10:51:212
235483999298,3cyclictest0-21swapper/109:51:151
235483999296,10cyclictest2590277-21sshd11:05:341
235483999293,15cyclictest2653460-21ntpq12:06:221
235483999293,14cyclictest2574109-21ntpq10:46:221
2354839992925,2cyclictest2481752-21irqrtprio09:16:161
2354839992925,2cyclictest2481752-21irqrtprio09:16:151
2354839992924,3cyclictest2362210-21cpuspeed_turbos07:16:111
2354839992923,4cyclictest2520596-21apt-get09:56:081
235483999292,15cyclictest2489721-21ntpq09:21:191
235483999292,15cyclictest0-21swapper/111:11:071
235483999292,10cyclictest2416445-21latency_hist08:10:011
235483999291,18cyclictest2381412-21runrttasks07:34:361
235483699293,25cyclictest2340027-21kworker/0:1+events07:11:400
2354836992925,2cyclictest2654927-21fschecks_count12:11:110
2354836992924,3cyclictest2578957-21needreboot10:51:200
2354836992923,4cyclictest2520488-21kworker/u8:0+flush-8:010:36:170
2354836992922,5cyclictest2583915-21journal-offline10:56:190
235483699292,22cyclictest2451061-21kworker/0:1+events08:45:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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