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2026-05-17 - 18:23

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 May 17, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1873121360,3sleep30-21swapper/312:17:433
1873121360,3sleep30-21swapper/312:17:433
2061721270,3sleep30-21swapper/309:27:503
2061721270,3sleep30-21swapper/309:27:503
2061721270,3sleep30-21swapper/309:27:503
11552880,2sleep30-21swapper/310:02:523
11552880,2sleep30-21swapper/310:02:523
11552880,2sleep30-21swapper/310:02:523
179582830,3sleep00-21swapper/009:22:400
179582830,3sleep00-21swapper/009:22:400
179582830,3sleep00-21swapper/009:22:400
163122670,2sleep016311-21vmstat10:42:530
163122670,2sleep016311-21vmstat10:42:530
163122670,2sleep016311-21vmstat10:42:530
188392660,2sleep10-21swapper/110:52:391
188392660,2sleep10-21swapper/110:52:391
66462630,8sleep0201rcuc/007:27:310
320192610,2chrt0-21swapper/010:00:230
49062560,2sleep10-21swapper/108:47:441
49062560,2sleep10-21swapper/108:47:441
49062560,2sleep10-21swapper/108:47:441
307862540,2sleep30-21swapper/309:57:413
299292540,4sleep029932-21grep09:52:520
299292540,4sleep029932-21grep09:52:520
299292540,4sleep029932-21grep09:52:520
16382540,8sleep01639-21gltestperf11:32:410
16382540,8sleep01639-21gltestperf11:32:410
194452530,2sleep30-21swapper/310:52:443
194452530,2sleep30-21swapper/310:52:443
202112510,1sleep3431rcuc/308:02:443
202112510,1sleep3431rcuc/308:02:443
202112510,1sleep3431rcuc/308:02:443
103892470,1sleep110393-21wc10:27:501
103892470,1sleep110393-21wc10:27:501
140552420,3sleep20-21swapper/210:37:482
140552420,3sleep20-21swapper/210:37:482
1138994033,5cyclictest550-21cron10:52:280
1138994033,5cyclictest550-21cron10:52:280
1138994033,5cyclictest550-21cron10:52:280
1138993629,5cyclictest20056-21netstat09:27:450
1138993629,5cyclictest20056-21netstat09:27:450
1138993629,5cyclictest20056-21netstat09:27:450
1138993427,6cyclictest545-21in:imuxsock11:27:490
1138993427,6cyclictest545-21in:imuxsock11:27:490
1138993423,9cyclictest17688-21sshd12:13:240
1138993423,9cyclictest17688-21sshd12:13:240
241782330,1sleep2351rcuc/209:37:502
241782330,1sleep2351rcuc/209:37:502
1139993328,3cyclictest2218-21latency_hist08:42:271
1139993328,3cyclictest2218-21latency_hist08:42:271
1139993326,5cyclictest31684-21latency_hist11:27:281
1139993326,5cyclictest31684-21latency_hist11:27:281
1139993326,5cyclictest31684-21latency_hist11:27:281
1139993324,7cyclictest26733-21kernelversion11:12:451
1139993324,7cyclictest26733-21kernelversion11:12:451
1139993324,7cyclictest26733-21kernelversion11:12:451
1138993327,4cyclictest1137-21cyclictest08:57:510
1138993327,4cyclictest1137-21cyclictest08:57:510
93822320,2sleep129-21ksoftirqd/110:27:391
1139993228,3cyclictest29051-21gltestperf09:52:421
1139993228,3cyclictest29051-21gltestperf09:52:421
1139993228,3cyclictest29051-21gltestperf09:52:421
1139993224,6cyclictest11974-21fschecks_count09:07:401
1139993224,6cyclictest11974-21fschecks_count09:07:401
1138993227,4cyclictest572-21cups-browsed07:47:500
1138993227,4cyclictest572-21cups-browsed07:47:500
1138993227,3cyclictest28843-21fschecks_count09:52:410
1138993227,3cyclictest28843-21fschecks_count09:52:410
1138993224,6cyclictest12035-21cut09:07:400
1138993224,6cyclictest12035-21cut09:07:400
1139993125,4cyclictest22120-21gltestperf08:07:421
1138993126,3cyclictest1137-21cyclictest09:41:470
1138993126,3cyclictest1137-21cyclictest09:41:470
214862300,1sleep121569-21/usr/sbin/munin10:57:501
214862300,1sleep121569-21/usr/sbin/munin10:57:501
173402300,2sleep20-21swapper/207:52:502
149902300,2sleep30-21swapper/312:07:423
149902300,2sleep30-21swapper/312:07:423
1139993025,4cyclictest26020-21latency_hist11:12:271
1139993025,4cyclictest26020-21latency_hist11:12:271
1139993025,3cyclictest10320-21gltestperf09:02:431
1139993025,3cyclictest10320-21gltestperf09:02:431
1139993024,4cyclictest19693-21latency_hist08:02:281
1139993024,4cyclictest19693-21latency_hist08:02:281
1139993022,6cyclictest24075-21fschecks_time12:32:401
1138993023,5cyclictest9191-21latency_hist10:27:280
1138993023,5cyclictest9191-21latency_hist10:27:280
1138993023,5cyclictest9191-21latency_hist10:27:280
1138993023,5cyclictest26127-21latency_hist11:12:330
1138993023,5cyclictest26127-21latency_hist11:12:330
1138993016,12cyclictest0-21swapper/011:17:420
1138993016,12cyclictest0-21swapper/011:17:420
1139992924,4cyclictest20660-21ntp_kernel_pll_08:02:491
1139992924,4cyclictest20660-21ntp_kernel_pll_08:02:491
1139992924,4cyclictest20660-21ntp_kernel_pll_08:02:491
1139992924,4cyclictest19100-21sendmail_mailqu12:17:481
1139992924,4cyclictest19100-21sendmail_mailqu12:17:481
1139992923,5cyclictest29054-21switchtime11:17:501
1139992923,5cyclictest29054-21switchtime11:17:501
1139992923,4cyclictest29596-21gltestperf08:27:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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