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2026-09-02 - 07:43

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 Wed Sep 02, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1315421200,2chrt0-21swapper/319:44:283
3019821130,3sleep20-21swapper/221:59:182
3019821130,3sleep20-21swapper/221:59:182
873121120,2chrt0-21swapper/223:54:192
873121120,2chrt0-21swapper/223:54:192
1276421120,2chrt0-21swapper/000:04:220
1276421120,2chrt0-21swapper/000:04:220
1291121010,3sleep30-21swapper/300:04:253
1291121010,3sleep30-21swapper/300:04:253
7742810,2chrt29-21ksoftirqd/123:34:121
7742810,2chrt29-21ksoftirqd/123:34:121
164302790,3chrt0-21swapper/219:54:242
170292670,3chrt0-21swapper/121:24:161
170292670,3chrt0-21swapper/121:24:161
16202660,3sleep10-21swapper/120:42:271
16202660,3sleep10-21swapper/120:42:271
280402640,2chrt28028-21idleruntime23:19:200
280402640,2chrt28028-21idleruntime23:19:200
247182640,3sleep20-21swapper/221:44:192
240712620,1sleep20-21swapper/200:34:242
240712620,1sleep20-21swapper/200:34:242
166432610,3sleep10-21swapper/119:54:271
829995950,4cyclictest0-21swapper/100:04:221
829995950,4cyclictest0-21swapper/100:04:221
204512570,1sleep00-21swapper/022:59:190
204512570,1sleep00-21swapper/022:59:190
174862560,2sleep10-21swapper/121:24:201
169642560,2chrt0-21swapper/319:54:293
265062540,3sleep30-21swapper/323:14:243
265062540,3sleep30-21swapper/323:14:243
40152520,3sleep20-21swapper/222:14:262
150132490,1sleep10-21swapper/121:19:091
150132490,1sleep10-21swapper/121:19:091
823994838,6cyclictest0-21swapper/000:04:100
823994838,6cyclictest0-21swapper/000:04:100
186742450,2sleep018675-21gltestperf22:54:200
114662440,3sleep10-21swapper/122:34:231
308242430,3chrt0-21swapper/220:34:202
308242430,3chrt0-21swapper/220:34:202
195782410,2sleep30-21swapper/320:04:183
84399403,27cyclictest12039-21chrt00:04:093
84399403,27cyclictest12039-21chrt00:04:093
249022390,2sleep00-21swapper/023:09:270
249022390,2sleep00-21swapper/023:09:270
829993728,7cyclictest16627-21netstat00:14:241
75772360,2sleep17578-21/usr/sbin/munin23:49:281
75772360,2sleep17578-21/usr/sbin/munin23:49:281
183542360,1sleep018451-21/usr/sbin/munin19:59:290
183542360,1sleep018451-21/usr/sbin/munin19:59:290
44042350,3sleep20-21swapper/223:44:062
44042350,3sleep20-21swapper/223:44:062
188982350,1sleep118932-21cpu21:29:151
188982350,1sleep118932-21cpu21:29:151
283832340,3sleep128386-21ntp_offset23:19:251
283832340,3sleep128386-21ntp_offset23:19:251
829993324,7cyclictest24626-21netstat23:09:231
829993324,7cyclictest24626-21netstat23:09:231
823993326,5cyclictest5429-21fschecks_time22:19:200
823993326,5cyclictest5429-21fschecks_time22:19:200
823993326,5cyclictest13333-21needreboot22:39:230
823993326,5cyclictest13333-21needreboot22:39:230
247862330,3sleep30-21swapper/323:09:263
247862330,3sleep30-21swapper/323:09:263
213412330,3sleep20-21swapper/222:59:282
213412330,3sleep20-21swapper/222:59:282
82999328,7cyclictest271rcuc/122:25:431
82999328,7cyclictest271rcuc/122:25:431
829993228,2cyclictest0-21swapper/120:54:061
829993228,2cyclictest0-21swapper/120:54:061
829993224,6cyclictest9437-21threads23:54:281
829993224,6cyclictest9437-21threads23:54:281
829993218,4cyclictest90-1pr/ttyS021:35:451
829993216,8cyclictest90-1pr/ttyS020:09:081
823993226,5cyclictest25859-21processes20:19:260
823993226,5cyclictest25859-21processes20:19:260
823993226,4cyclictest810-21cyclictest20:24:270
823993225,5cyclictest4582-21latency_hist23:44:160
310332320,2sleep031143-21timerandwakeup21:59:290
310332320,2sleep031143-21timerandwakeup21:59:290
82999315,6cyclictest281ktimers/120:29:591
829993123,6cyclictest26658-21gltestperf21:49:201
829993120,4cyclictest181rcu_preempt22:10:141
829993120,4cyclictest181rcu_preempt22:10:141
829993119,2cyclictest181rcu_preempt22:07:001
829993116,2cyclictest181rcu_preempt20:19:291
829993116,2cyclictest181rcu_preempt20:19:291
823993123,6cyclictest16292-21unixbench-2d21:19:310
823993123,6cyclictest16292-21unixbench-2d21:19:310
823993123,6cyclictest16292-21unixbench-2d21:19:310
82399311,7cyclictest0-21swapper/023:36:050
82399311,7cyclictest0-21swapper/023:36:050
179882310,1sleep018157-21cat21:24:280
829993025,3cyclictest6842-21latency_hist22:24:051
829993025,3cyclictest6842-21latency_hist22:24:051
829993024,4cyclictest27433-21latency_hist23:19:051
829993024,4cyclictest27433-21latency_hist23:19:051
829993021,7cyclictest21579-21fschecks_time20:09:181
829993019,4cyclictest181rcu_preempt23:37:051
829993019,4cyclictest181rcu_preempt23:37:051
829993018,3cyclictest181rcu_preempt23:42:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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