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2025-11-28 - 11:34

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 Fri Nov 28, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3078390997324,40cyclictest3112981-21/usr/sbin/munin22:30:202
307838899688,22cyclictest0-21swapper/121:50:221
307838899663,20cyclictest3084753-21/usr/sbin/munin19:45:171
307838599652,27cyclictest21250irq/208-8000000.ethernet22:05:000
3078385996521,20cyclictest15-21rcuc/020:15:010
3078390996453,7cyclictest3111946-21munin-plugin-st22:24:592
307838899641,34cyclictest0-21swapper/119:10:001
3078390996210,46cyclictest3123119-21/usr/sbin/munin23:30:192
3078390995914,39cyclictest3089701-21apt-key20:15:012
307839099590,21cyclictest0-21swapper/200:40:002
307838599592,43cyclictest0-21swapper/022:50:120
307838899578,19cyclictest0-21swapper/119:50:211
3078388995541,10cyclictest3130597-21cron00:15:001
3078390995436,9cyclictest3094019-21munin-plugin-st20:40:002
307838599537,17cyclictest0-21swapper/023:35:010
3078385995342,6cyclictest3134000-21munin-plugin-st00:35:000
3078385995342,6cyclictest3134000-21munin-plugin-st00:35:000
3078385995239,9cyclictest0-21swapper/021:50:000
3078385995218,21cyclictest131ktimers/023:40:160
307839099516,25cyclictest0-21swapper/220:55:022
3078390995039,7cyclictest0-21swapper/200:05:012
307839099502,17cyclictest3131665-21/usr/sbin/munin00:20:202
3078388995012,10cyclictest0-21swapper/120:20:021
3078388995010,18cyclictest3078382-21cyclictest00:20:021
307838599505,15cyclictest15-21rcuc/022:10:010
3078390994933,11cyclictest0-21swapper/220:45:132
3078390994930,12cyclictest0-21swapper/221:30:122
3078385994942,5cyclictest3087932-21grep20:05:000
3078385994933,11cyclictest0-21swapper/019:35:300
3078390994730,11cyclictest0-21swapper/223:20:142
3078390994727,13cyclictest3114231-21/usr/sbin/munin22:35:282
3078390994721,16cyclictest3109094-21/usr/sbin/munin22:05:292
307839099471,25cyclictest0-21swapper/219:55:012
307839099471,16cyclictest0-21swapper/221:25:012
3078385994740,4cyclictest0-21swapper/022:25:130
3078385994740,4cyclictest0-21swapper/022:25:130
3078385994715,25cyclictest3090853-21/usr/sbin/munin20:20:210
3078390994623,14cyclictest3079094-21grep19:10:302
307838899468,32cyclictest0-21swapper/121:30:011
3078388994632,9cyclictest0-21swapper/122:05:321
3078388994626,14cyclictest0-21swapper/121:20:211
3078385994634,7cyclictest3131460-21sendmail00:20:000
3078385994633,8cyclictest0-21swapper/023:00:290
3078385994632,10cyclictest0-21swapper/022:20:290
3078390994537,4cyclictest3091496-21munin-plugin-st20:25:002
3078390994533,6cyclictest0-21swapper/222:45:132
3078390994528,9cyclictest3130037-21/usr/sbin/munin00:10:192
3078390994524,13cyclictest3104049-21/usr/sbin/munin21:35:302
3078390994523,15cyclictest3087463-21cut20:00:202
3078390994523,12cyclictest0-21swapper/222:40:122
3078390994523,12cyclictest0-21swapper/222:40:122
3078390994522,13cyclictest3127631-21/usr/sbin/munin23:55:232
3078390994522,10cyclictest0-21swapper/219:20:152
307838899459,4cyclictest0-21swapper/123:15:011
307838899459,4cyclictest0-21swapper/123:15:001
3078388994528,11cyclictest0-21swapper/120:40:231
3078388994526,14cyclictest3111845-21grep22:20:281
3078388994526,14cyclictest0-21swapper/123:50:301
3078385994532,8cyclictest0-21swapper/022:15:290
3078390994427,9cyclictest0-21swapper/220:20:012
3078390994427,12cyclictest3125655-21munin-node23:45:122
3078390994424,12cyclictest3118403-21/usr/sbin/munin23:00:252
3078390994424,11cyclictest0-21swapper/219:45:182
3078390994422,12cyclictest3117504-21/usr/sbin/munin22:55:242
307838899446,3cyclictest0-21swapper/120:35:011
307838899444,4cyclictest0-21swapper/123:45:011
3078388994430,10cyclictest0-21swapper/100:35:271
3078388994428,10cyclictest0-21swapper/100:00:301
3078385994435,5cyclictest3079373-21wc19:15:010
3078385994430,10cyclictest0-21swapper/021:45:010
3078390994337,3cyclictest3109595-21/usr/sbin/munin22:10:192
3078390994337,3cyclictest3109595-21/usr/sbin/munin22:10:182
3078390994330,9cyclictest3093121-21grep20:30:282
3078390994327,11cyclictest0-21swapper/220:25:302
3078390994326,12cyclictest0-21swapper/219:30:132
3078390994325,12cyclictest0-21swapper/220:55:152
3078390994323,10cyclictest3081440-21dropbear19:25:172
3078390994320,15cyclictest1265-21rs:main2
3078390994320,15cyclictest1265-21rs:main2
3078390994318,17cyclictest3080279-21grep19:15:292
3078388994335,5cyclictest3083700-21cut19:40:001
3078388994317,17cyclictest0-21swapper/120:00:241
3078385994327,12cyclictest0-21swapper/020:40:290
307839099427,22cyclictest20991ptp019:35:162
3078390994226,12cyclictest3101180-21/usr/sbin/munin21:20:192
3078390994226,12cyclictest0-21swapper/220:05:132
3078390994226,11cyclictest3121067-21/usr/sbin/munin23:15:282
3078390994226,11cyclictest3110439-21apt-get22:15:152
3078390994224,9cyclictest3086761-21phc2sys19:55:262
3078390994224,9cyclictest0-21swapper/222:25:292
3078390994224,9cyclictest0-21swapper/222:25:292
3078390994223,11cyclictest3119063-21cut23:05:202
3078390994223,10cyclictest3122633-21phc2sys-jitter23:25:272
3078390994223,10cyclictest3122633-21phc2sys-jitter23:25:272
3078390994213,23cyclictest2-21kthreadd21:09:262
3078388994229,8cyclictest0-21swapper/121:40:281
3078388994228,10cyclictest0-21swapper/100:05:271
3078388994223,10cyclictest0-21swapper/122:00:291
3078388994216,15cyclictest0-21swapper/121:05:231
3078385994234,4cyclictest21050irq/252-8000000.ethernet21:40:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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