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2025-12-09 - 13:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Tue Dec 09, 2025 00:44:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2735821280,2sleep027360-21grep23:44:150
447921090,2chrt4477-21irqstats21:19:080
201212920,3sleep30-21swapper/320:34:093
201212920,3sleep30-21swapper/320:34:093
167152920,2chrt16716-21sort23:19:001
287232900,2sleep10-21swapper/122:24:051
287232900,2sleep10-21swapper/122:24:051
213382870,3sleep30-21swapper/320:39:033
213382870,3sleep30-21swapper/320:39:033
203192790,2sleep020312-21latency_hist23:28:520
203192790,2sleep020312-21latency_hist23:28:520
188732740,2sleep118874-21latency_hist21:58:521
188732740,2sleep118874-21latency_hist21:58:521
78792730,1sleep3431rcuc/321:29:043
201992700,1sleep10-21swapper/120:34:111
201992700,1sleep10-21swapper/120:34:111
322012550,2sleep30-21swapper/322:34:003
215122440,2sleep121504-21latency22:04:071
215122440,2sleep121504-21latency22:04:071
51702410,2sleep10-21swapper/119:54:121
51702410,2sleep10-21swapper/119:54:121
145242410,2sleep014548-21ntp_states20:19:110
145242410,2sleep014548-21ntp_states20:19:110
51162400,2chrt394-21snmpd22:47:201
265202380,4sleep10-21swapper/122:18:581
265202380,4sleep10-21swapper/122:18:581
322642350,2sleep00-21swapper/023:59:070
322642350,2sleep00-21swapper/023:59:070
308722350,2sleep10-21swapper/121:04:061
308722350,2sleep10-21swapper/121:04:061
21759993530,3cyclictest22995-21latency_hist20:43:511
21759993530,3cyclictest22995-21latency_hist20:43:511
120292350,2sleep012132-21fschecks_time20:14:050
34512340,1sleep13349-21latency_hist22:43:551
34512340,1sleep13349-21latency_hist22:43:551
21759993325,6cyclictest3219-21netstat19:49:091
21759993325,6cyclictest32026-21latency_hist22:33:521
21759993325,6cyclictest26427-21cut23:44:051
21758993324,7cyclictest6089-21fschecks_count21:24:060
21758993324,7cyclictest6089-21fschecks_count21:24:060
110992320,3sleep20-21swapper/223:04:012
110992320,3sleep20-21swapper/223:04:012
21759993127,2cyclictest0-21swapper/100:23:511
21759993127,2cyclictest0-21swapper/100:23:511
21759993127,2cyclictest0-21swapper/100:23:511
21759993124,5cyclictest7578-21cut22:54:071
21759993124,5cyclictest7578-21cut22:54:071
21759993124,5cyclictest4313-21unixbench-2d00:09:161
21759993124,5cyclictest4313-21unixbench-2d00:09:161
21759993123,6cyclictest31849-21needreboot19:39:091
21759993123,6cyclictest31849-21needreboot19:39:091
21758993125,5cyclictest2615-21kernelversion21:14:090
21758993125,5cyclictest21025-21kernelversion23:29:080
21758993125,5cyclictest21025-21kernelversion23:29:080
21758993125,4cyclictest13170-21cron21:43:510
21758993125,4cyclictest13170-21cron21:43:510
21758993124,5cyclictest8399-21cut20:04:060
21758993118,11cyclictest0-21swapper/021:44:040
184022310,1sleep118451-21idleruntime-cro23:23:511
184022310,1sleep118451-21idleruntime-cro23:23:511
21759993024,5cyclictest10323-21cut20:09:071
21759993024,5cyclictest10323-21cut20:09:071
21759993023,5cyclictest21757-21cyclictest21:52:501
21759993023,5cyclictest21757-21cyclictest21:52:501
21759993018,4cyclictest181rcu_preempt23:09:061
21758993022,6cyclictest30129-21fschecks_count23:54:060
21758993022,6cyclictest30129-21fschecks_count23:54:060
21758993022,6cyclictest20593-21unixbench-2d20:34:140
21758993022,6cyclictest20593-21unixbench-2d20:34:140
21759992925,3cyclictest13241-21needreboot00:34:101
21759992925,3cyclictest13241-21needreboot00:34:101
21759992924,4cyclictest3264-21unixbench-2d21:14:171
21759992923,4cyclictest0-21swapper/121:59:101
21759992923,4cyclictest0-21swapper/121:59:101
21759992922,5cyclictest29496-21cut19:34:051
21759992922,5cyclictest29496-21cut19:34:051
21759992922,5cyclictest26316-21unixbench_multi20:49:161
21759992922,5cyclictest26316-21unixbench_multi20:49:161
21759992921,6cyclictest16406-21netstat20:24:091
21759992921,6cyclictest16406-21netstat20:24:091
21759992920,6cyclictest0-21swapper/121:33:511
21758992922,5cyclictest32741-21kernelversion22:34:080
21758992922,5cyclictest2941-21latency_hist00:08:510
21758992922,5cyclictest0-21swapper/022:04:150
21758992922,5cyclictest0-21swapper/022:04:150
21759992821,4cyclictest0-21swapper/119:44:141
21759992821,4cyclictest0-21swapper/119:44:141
21758992824,3cyclictest9964-21ntp_offset22:59:130
21758992824,3cyclictest9964-21ntp_offset22:59:130
21758992824,3cyclictest15188-21ntp_offset00:39:110
21758992822,4cyclictest7920-21latency_hist20:03:510
21758992822,4cyclictest7920-21latency_hist20:03:510
21758992822,4cyclictest21757-21cyclictest21:34:060
21758992822,4cyclictest21757-21cyclictest21:34:060
21758992821,5cyclictest31046-21needreboot22:29:100
21758992819,7cyclictest3365-21sendmail22:43:510
21758992819,7cyclictest3365-21sendmail22:43:510
21758992819,7cyclictest14232-21latency_hist00:38:510
21758992819,7cyclictest14232-21latency_hist00:38:510
21759992719,6cyclictest14785-21sort20:19:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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