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2026-07-05 - 11:42

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 Sun Jul 05, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3166021210,2sleep30-21swapper/320:33:203
3166021210,2sleep30-21swapper/320:33:203
3166021210,2sleep30-21swapper/320:33:203
1796921030,2sleep3431rcuc/300:13:333
1796921030,2sleep3431rcuc/300:13:333
1796921030,2sleep3431rcuc/300:13:333
145242890,2chrt13018-40mandb00:03:431
145242890,2chrt13018-40mandb00:03:431
319262790,3chrt0-21swapper/120:33:261
319262790,3chrt0-21swapper/120:33:261
319262790,3chrt0-21swapper/120:33:261
272012590,3sleep20-21swapper/200:38:332
272012590,3sleep20-21swapper/200:38:332
151022590,1sleep114880-21/usr/sbin/munin19:48:251
151022590,1sleep114880-21/usr/sbin/munin19:48:251
151022590,1sleep114880-21/usr/sbin/munin19:48:251
46842580,3chrt0-21swapper/320:48:123
161262570,2sleep30-21swapper/300:08:353
161262570,2sleep30-21swapper/300:08:353
30842560,2sleep03087-21grep23:33:350
30842560,2sleep03087-21grep23:33:350
266602560,1sleep3431rcuc/300:38:263
266602560,1sleep3431rcuc/300:38:263
2204995548,4cyclictest0-21swapper/100:03:191
2204995548,4cyclictest0-21swapper/100:03:191
2204995548,4cyclictest0-21swapper/100:03:191
220202540,3sleep30-21swapper/322:58:323
220202540,3sleep30-21swapper/322:58:323
235462530,3sleep30-21swapper/321:38:163
172062510,3sleep30-21swapper/321:18:353
172062510,3sleep30-21swapper/321:18:353
165722470,2sleep3431rcuc/322:43:333
165722470,2sleep3431rcuc/322:43:333
165722470,2sleep3431rcuc/322:43:333
32272430,2sleep13229-21fschecks_count20:43:231
220699391,23cyclictest14555-21taskset00:04:082
220699391,23cyclictest14555-21taskset00:04:082
276252380,2sleep1601-21snmpd20:21:461
276252380,2sleep1601-21snmpd20:21:461
105772380,2sleep110578-21sshd19:33:571
105772380,2sleep110578-21sshd19:33:571
260292370,1sleep10-21swapper/120:18:191
260292370,1sleep10-21swapper/120:18:191
260292370,1sleep10-21swapper/120:18:191
2204993729,6cyclictest8080-21netstat19:28:291
2204993729,6cyclictest8080-21netstat19:28:291
2204993729,6cyclictest8080-21netstat19:28:291
2203993724,9cyclictest13168-21/usr/sbin/munin00:03:290
2203993724,9cyclictest13168-21/usr/sbin/munin00:03:290
61002360,3sleep10-21swapper/120:48:341
275382350,3sleep027543-21unixbench_singl00:38:350
275382350,3sleep027543-21unixbench_singl00:38:350
2203993427,5cyclictest3211-21netstat22:08:290
2203993427,5cyclictest3211-21netstat22:08:290
2203993426,6cyclictest7913-21sendmail22:23:120
2203993426,6cyclictest7913-21sendmail22:23:120
2203993426,6cyclictest7913-21sendmail22:23:120
2204993326,5cyclictest2286-21latency_hist22:08:231
2204993326,5cyclictest2286-21latency_hist22:08:231
2203993326,5cyclictest10821-21fschecks_time21:03:250
2203993326,5cyclictest10821-21fschecks_time21:03:250
220699321,21cyclictest13103-21chrt00:03:192
220699321,21cyclictest13103-21chrt00:03:192
220699321,21cyclictest13103-21chrt00:03:192
2204993226,3cyclictest2807-21sendmail20:43:121
2204993226,3cyclictest2807-21sendmail20:43:121
2204993225,5cyclictest26075-21latency_hist00:38:121
2204993225,5cyclictest26075-21latency_hist00:38:121
2204993224,6cyclictest547-21rs:main1
2204993224,6cyclictest547-21rs:main1
2204993224,6cyclictest22535-21cut20:08:241
2204993224,6cyclictest22535-21cut20:08:241
2204993223,7cyclictest10349-21latency_hist21:03:111
2203993224,6cyclictest7497-21netstat20:53:300
2203993224,6cyclictest7497-21netstat20:53:300
2203993224,6cyclictest17749-21fschecks_time22:48:240
2203993224,6cyclictest17749-21fschecks_time22:48:240
2203993224,6cyclictest11806-21needreboot19:38:290
2203993224,6cyclictest11806-21needreboot19:38:290
199912320,2sleep1281ktimers/122:53:281
199912320,2sleep1281ktimers/122:53:281
285932310,5sleep028596-21unixbench-2d21:48:350
285932310,5sleep028596-21unixbench-2d21:48:350
2204993125,4cyclictest9804-21latency_hist23:53:251
2204993124,5cyclictest22810-21cut00:28:251
2203993127,3cyclictest21036-21cron22:58:110
2203993127,3cyclictest21036-21cron22:58:110
2204993023,5cyclictest8855-21netstat22:23:281
2204993023,5cyclictest8855-21netstat22:23:281
2204993023,5cyclictest8855-21netstat22:23:281
2204993023,5cyclictest32703-21kworker/u9:2-writeback21:28:231
2204993023,5cyclictest32703-21kworker/u9:2-writeback21:28:231
2204993022,6cyclictest2200-21cyclictest21:54:211
2204993022,6cyclictest2200-21cyclictest21:54:211
2204993022,6cyclictest2200-21cyclictest19:58:061
2204993022,6cyclictest2200-21cyclictest19:58:061
2203993024,4cyclictest2200-21cyclictest23:03:130
2203993024,4cyclictest2200-21cyclictest23:03:130
2203993023,5cyclictest32286-21timerwakeupswit21:58:340
2203993023,5cyclictest32286-21timerwakeupswit21:58:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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