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2026-07-23 - 13:15

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 Thu Jul 23, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2444621650,2sleep3431rcuc/320:33:483
2444621650,2sleep3431rcuc/320:33:483
2785021210,1chrt0-21swapper/023:43:430
2785021210,1chrt0-21swapper/023:43:430
2785021210,1chrt0-21swapper/023:43:430
310552860,2chrt31057-21sh23:53:280
310552860,2chrt31057-21sh23:53:280
197362800,3sleep019741-21latency_hist20:23:280
197362800,3sleep019741-21latency_hist20:23:280
169792760,2chrt16978-21ntpq20:13:481
169792760,2chrt16978-21ntpq20:13:481
140482670,3sleep00-21swapper/021:33:430
140482670,3sleep00-21swapper/021:33:430
140482670,3sleep00-21swapper/021:33:430
26594994935,12cyclictest700-21192.168.115.40-manager21:33:251
26594994935,12cyclictest700-21192.168.115.40-manager21:33:251
26594994935,12cyclictest700-21192.168.115.40-manager21:33:251
133402490,3chrt0-21swapper/300:33:473
133402490,3chrt0-21swapper/300:33:473
133402490,3chrt0-21swapper/300:33:473
2659399443,19cyclictest2503-21cat00:03:360
2659399443,19cyclictest2503-21cat00:03:360
2659399443,19cyclictest2503-21cat00:03:360
26593994422,20cyclictest32095-21gltestperf19:28:410
26593994422,19cyclictest23746-21latency_hist23:33:360
26593994422,19cyclictest23746-21latency_hist23:33:360
26593994318,23cyclictest3390-21gltestperf19:38:420
26593994318,23cyclictest3390-21gltestperf19:38:420
26594994213,12cyclictest4451-21sed00:08:401
26594994213,12cyclictest4451-21sed00:08:401
26593994118,20cyclictest0-21swapper/021:03:390
26594994031,6cyclictest700-21192.168.115.40-manager20:01:231
26594994031,6cyclictest700-21192.168.115.40-manager20:01:231
26594994014,11cyclictest28702-21cat22:13:381
26594994014,11cyclictest28702-21cat22:13:381
26594994014,11cyclictest28702-21cat22:13:381
2659399401,13cyclictest5508-21sort19:43:440
2659399401,13cyclictest5508-21sort19:43:440
2659399401,13cyclictest5508-21sort19:43:440
26593994010,3cyclictest0-21swapper/022:27:210
26593994010,3cyclictest0-21swapper/022:27:210
26594993914,8cyclictest19530-21chrt20:20:561
26594993914,8cyclictest19530-21chrt20:20:561
26594993913,11cyclictest7750-21runrttasks21:16:261
26594993913,11cyclictest7750-21runrttasks21:16:261
2659499390,34cyclictest3272-21strings00:03:451
2659399398,5cyclictest749-21runrttasks21:23:290
2659399398,5cyclictest749-21runrttasks21:23:290
26593993919,18cyclictest0-21swapper/023:33:490
26593993919,18cyclictest0-21swapper/023:33:490
26593993917,20cyclictest8746-21cat00:23:360
26593993917,20cyclictest8746-21cat00:23:360
26594993824,9cyclictest700-21192.168.115.40-manager23:25:581
26594993824,9cyclictest700-21192.168.115.40-manager23:25:581
26594993813,9cyclictest31041-21cat20:53:321
26594993813,9cyclictest31041-21cat20:53:321
26594993813,8cyclictest8184-21taskset22:49:031
26594993813,8cyclictest8184-21taskset22:49:031
26594993813,8cyclictest8184-21taskset22:49:031
26594993813,12cyclictest4260-21latency_hist21:08:351
26594993813,12cyclictest4260-21latency_hist21:08:351
26594993813,12cyclictest1479-21taskset22:25:311
26594993813,12cyclictest1479-21taskset22:25:311
26594993812,10cyclictest32185-21taskset22:22:351
26594993812,10cyclictest17177-21mailstats23:13:501
26594993812,10cyclictest17177-21mailstats23:13:501
26594993812,10cyclictest17177-21mailstats23:13:501
26593993832,4cyclictest17336-21ls21:43:280
26593993832,4cyclictest17336-21ls21:43:280
26593993815,21cyclictest0-21swapper/021:53:490
26593993815,21cyclictest0-21swapper/021:53:490
26593993815,21cyclictest0-21swapper/021:53:490
26593993813,2cyclictest0-21swapper/023:23:500
26593993813,2cyclictest0-21swapper/023:23:500
26593993811,4cyclictest16431-21latency_hist23:13:410
26593993811,4cyclictest16431-21latency_hist23:13:410
2659399381,12cyclictest1189-21/usr/sbin/munin19:33:410
2659399381,12cyclictest1189-21/usr/sbin/munin19:33:410
2659399381,11cyclictest747-21ls23:58:410
2659399381,11cyclictest747-21ls23:58:410
2659399381,11cyclictest345-21latency_hist20:58:280
2659399381,11cyclictest345-21latency_hist20:58:280
2659399381,10cyclictest21981-21fschecks_count20:28:420
127532380,1chrt0-21swapper/320:03:413
127532380,1chrt0-21swapper/320:03:413
127532380,1chrt0-21swapper/320:03:413
26594993728,7cyclictest700-21192.168.115.40-manager23:02:281
26594993728,7cyclictest700-21192.168.115.40-manager23:02:281
26594993728,7cyclictest700-21192.168.115.40-manager23:02:281
26594993727,9cyclictest700-21192.168.115.40-manager00:31:301
26594993727,9cyclictest700-21192.168.115.40-manager00:31:301
26594993726,9cyclictest700-21192.168.115.40-manager22:16:561
26594993726,9cyclictest700-21192.168.115.40-manager22:16:561
26594993726,9cyclictest700-21192.168.115.40-manager22:16:561
26594993711,9cyclictest32551-21seq20:55:081
26594993711,9cyclictest32551-21seq20:55:081
2659399379,5cyclictest27621-21kworker/u9:4+rpciod20:14:230
2659399379,5cyclictest27621-21kworker/u9:4+rpciod20:14:230
2659399378,7cyclictest14678-21systemd-journal22:03:280
2659399378,7cyclictest14678-21systemd-journal22:03:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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