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2026-06-10 - 04:44

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 Wed Jun 10, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1018872996210,18cyclictest1046697-21/usr/sbin/munin21:50:181
1018868996154,4cyclictest131ktimers/021:10:020
1018868995930,26cyclictest20850irq/208-8000000.ethernet19:55:210
1018868995547,5cyclictest1047340-21munin-plugin-st21:54:590
1018868995245,4cyclictest20650irq/252-8000000.ethernet20:45:270
1018868995243,6cyclictest1029216-21grep20:05:280
1018875995139,7cyclictest1073502-21unixbench_multi00:25:292
1018872995135,11cyclictest1034490-21sendmail20:40:001
101886899514,43cyclictest15-21rcuc/023:00:010
1018868995141,7cyclictest0-21swapper/023:30:130
101886899502,12cyclictest1050600-21tail22:10:280
101886899502,12cyclictest1050600-21tail22:10:280
1018875994942,4cyclictest1071914-21sendmail00:20:002
1018875994835,8cyclictest0-21swapper/219:50:282
1018872994813,19cyclictest1047536-21/usr/sbin/munin21:55:201
101886899485,15cyclictest15-21rcuc/021:20:010
1018868994834,10cyclictest0-21swapper/023:05:010
1018868994740,4cyclictest20650irq/252-8000000.ethernet20:30:300
1018868994738,5cyclictest14-21rcu_preempt20:20:180
1018868994738,5cyclictest1026660-21unixbench_singl19:50:290
1018868994738,4cyclictest20650irq/252-8000000.ethernet20:20:000
1018868994712,10cyclictest12-21ksoftirqd/022:25:020
101887599467,34cyclictest32-21ksoftirqd/223:00:012
1018875994633,8cyclictest1057476-21munin-plugin-st22:55:002
1018872994636,6cyclictest1061462-21ptp4l23:15:291
1018872994636,6cyclictest1061462-21ptp4l23:15:291
1018872994628,12cyclictest22-21rcuc/123:10:021
1018868994639,4cyclictest1021654-21munin-plugin-st19:25:010
1018868994637,6cyclictest0-21swapper/022:45:200
1018875994534,6cyclictest0-21swapper/223:45:292
1018875994525,11cyclictest1067513-21grep23:50:292
1018875994436,5cyclictest1020684-21grep19:15:282
1018872994435,5cyclictest0-21swapper/122:30:011
1018868994437,4cyclictest167350irq/118-8000000.ethernet-tx019:40:240
1018868994435,5cyclictest1075217-21unixbench_multi00:35:280
1018868994435,5cyclictest1019618-21grep19:10:280
1018868994434,8cyclictest1020686-21unixbench_multi19:15:290
1018875994335,4cyclictest1-21systemd23:10:012
1018875994332,7cyclictest0-21swapper/221:50:012
1018875994329,10cyclictest0-21swapper/221:50:272
101887299435,30cyclictest0-21swapper/119:15:261
1018868994337,4cyclictest167350irq/118-8000000.ethernet-tx019:29:590
1018868994336,4cyclictest167350irq/118-8000000.ethernet-tx023:15:250
1018868994336,4cyclictest167350irq/118-8000000.ethernet-tx023:15:240
1018868994332,8cyclictest0-21swapper/020:55:000
101886899432,4cyclictest1032232-21df_inode20:25:180
101886899432,4cyclictest1032232-21df_inode20:25:170
101886899432,37cyclictest1045769-21/usr/sbin/munin21:45:110
1018868994311,30cyclictest12-21ksoftirqd/020:35:200
1018875994231,7cyclictest0-21swapper/220:25:012
101887299426,29cyclictest1036963-21unixbench_singl20:50:281
1018872994233,5cyclictest0-21swapper/122:05:001
1018872994230,8cyclictest0-21swapper/120:30:311
1018868994234,4cyclictest20650irq/252-8000000.ethernet22:50:250
1018868994227,9cyclictest0-21swapper/023:50:290
1018868994222,18cyclictest1060000-21kworker/u8:1+events_power_efficient23:40:320
101886899421,36cyclictest0-21swapper/022:45:010
1018875994133,4cyclictest14-21rcu_preempt23:55:302
1018875994127,10cyclictest0-21swapper/219:15:012
1018872994132,6cyclictest0-21swapper/123:00:271
101886899419,5cyclictest0-21swapper/022:00:260
1018868994135,3cyclictest0-21swapper/000:25:290
1018868994133,4cyclictest0-21swapper/000:00:300
1018868994133,4cyclictest0-21swapper/000:00:290
1018868994132,5cyclictest14-21rcu_preempt22:30:280
1018868994130,8cyclictest0-21swapper/021:05:290
1018868994130,8cyclictest0-21swapper/021:05:290
1018868994130,5cyclictest0-21swapper/021:30:340
1018868994129,9cyclictest0-21swapper/000:15:350
1018868994126,9cyclictest0-21swapper/023:10:020
1018875994028,8cyclictest0-21swapper/200:05:332
1018875994026,9cyclictest0-21swapper/223:29:592
1018875994026,9cyclictest0-21swapper/222:35:262
1018875994026,9cyclictest0-21swapper/222:35:262
1018875994024,8cyclictest0-21swapper/220:55:292
1018875994023,9cyclictest0-21swapper/222:10:262
1018875994023,9cyclictest0-21swapper/222:10:262
1018875994023,12cyclictest311ktimers/219:45:122
1018872994031,5cyclictest1032808-21munin-plugin-st20:30:011
1018872994031,5cyclictest1032808-21munin-plugin-st20:30:011
1018872994023,9cyclictest0-21swapper/120:45:261
1018868994030,5cyclictest0-21swapper/019:35:270
101886899401,36cyclictest1066395-21kernelversion23:45:240
1018875993928,7cyclictest0-21swapper/221:20:202
101887599392,30cyclictest1027772-21/usr/sbin/munin20:00:212
101887299393,15cyclictest22-21rcuc/121:50:011
1018872993927,7cyclictest0-21swapper/100:05:331
1018872993924,10cyclictest0-21swapper/119:15:021
101887299391,31cyclictest0-21swapper/119:30:201
1018868993932,4cyclictest0-21swapper/000:05:240
1018868993931,5cyclictest1062469-21grep23:20:300
1018868993929,7cyclictest1035284-21grep20:40:290
101886899392,3cyclictest1063047-21meminfo23:25:250
1018875993829,5cyclictest0-21swapper/221:15:322
1018875993827,7cyclictest1039482-21grep21:05:302
1018875993827,7cyclictest1039482-21grep21:05:302
1018875993827,7cyclictest1036151-21grep20:45:282
1018875993825,9cyclictest0-21swapper/219:20:302
101887299384,4cyclictest1022138-21kernelversion19:25:221
1018872993830,5cyclictest1025032-21munin-run19:45:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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