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2026-01-09 - 01:23

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 Thu Jan 08, 2026 12:44:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2525721100,4sleep30-21swapper/311:25:443
2525721100,4sleep30-21swapper/311:25:443
310422920,1sleep00-21swapper/010:10:480
310422920,1sleep00-21swapper/010:10:480
196682890,4sleep30-21swapper/311:10:453
196682890,4sleep30-21swapper/311:10:453
125272860,3chrt0-21swapper/209:20:292
125272860,3chrt0-21swapper/209:20:292
125272860,3chrt0-21swapper/209:20:292
301972840,3sleep20-21swapper/210:10:382
301972840,3sleep20-21swapper/210:10:382
64332820,3sleep30-21swapper/307:30:513
64332820,3sleep30-21swapper/307:30:513
81842790,1sleep1271rcuc/107:35:471
81842790,1sleep1271rcuc/107:35:471
81842790,1sleep1271rcuc/107:35:471
275602680,2sleep20-21swapper/210:00:452
275602680,2sleep20-21swapper/210:00:452
19242640,2sleep30-21swapper/310:20:403
19242640,2sleep30-21swapper/310:20:403
185132640,2sleep30-21swapper/312:35:393
185132640,2sleep30-21swapper/312:35:393
185132640,2sleep30-21swapper/312:35:393
134942610,3sleep013496-21grep07:50:460
134942610,3sleep013496-21grep07:50:460
37262590,2sleep30-21swapper/307:25:403
37262590,2sleep30-21swapper/307:25:403
93982550,3sleep30-21swapper/307:40:403
93982550,3sleep30-21swapper/307:40:403
302472540,3sleep30-21swapper/310:10:393
302472540,3sleep30-21swapper/310:10:393
252092510,3chrt0-21swapper/209:51:322
252092510,3chrt0-21swapper/209:51:322
180792490,3sleep20-21swapper/211:05:492
180792490,3sleep20-21swapper/211:05:492
60552480,4sleep30-21swapper/310:30:453
60552480,4sleep30-21swapper/310:30:453
161892450,4sleep30-21swapper/311:00:443
21962440,3sleep10-21swapper/108:50:451
161772430,1sleep20-21swapper/209:30:262
255532420,3chrt0-21swapper/309:55:273
255532420,3chrt0-21swapper/309:55:273
266612400,3sleep20-21swapper/211:30:382
221072400,1sleep122134-21forks09:45:371
221072400,1sleep122134-21forks09:45:371
30161993933,4cyclictest572-21cups-browsed11:20:260
30161993933,4cyclictest572-21cups-browsed11:20:260
30161993933,4cyclictest572-21cups-browsed11:20:260
30161993829,7cyclictest18631-21latency_hist08:10:260
30161993829,7cyclictest18631-21latency_hist08:10:260
57662350,2chrt0-21swapper/210:30:402
57662350,2chrt0-21swapper/210:30:402
30163993429,3cyclictest30246-21fschecks_count08:40:381
30163993429,3cyclictest30246-21fschecks_count08:40:381
30161993426,6cyclictest16386-21/usr/sbin/munin08:00:440
30161993426,6cyclictest16386-21/usr/sbin/munin08:00:440
30163993327,4cyclictest26670-21gltestperf10:00:351
30163993327,4cyclictest26670-21gltestperf10:00:351
30163993324,7cyclictest31800-21latency_hist10:15:281
30163993324,7cyclictest31800-21latency_hist10:15:281
16912330,3sleep00-21swapper/011:50:380
30161993226,4cyclictest11270-21kernelversion07:45:410
30161993226,4cyclictest11270-21kernelversion07:45:410
71762310,1sleep17177-21df_inode10:35:371
71762310,1sleep17177-21df_inode10:35:371
30163993126,3cyclictest20517-21gltestperf09:40:401
30163993126,3cyclictest20517-21gltestperf09:40:401
30163993124,5cyclictest15592-21timerandwakeup09:25:471
30161993124,5cyclictest30160-21cyclictest07:40:440
30161993124,5cyclictest30160-21cyclictest07:40:440
30161993123,6cyclictest5347-21cut09:00:380
30161993123,6cyclictest5347-21cut09:00:380
276052310,3chrt0-21swapper/208:30:522
269342310,9sleep0171ktimers/011:30:400
257272310,2chrt0-21swapper/208:25:492
149272310,4sleep014932-21gltestperf12:25:390
320942300,3sleep20-21swapper/211:45:372
30163993022,6cyclictest15230-21tr07:55:431
30163993022,6cyclictest15230-21tr07:55:431
30161993025,4cyclictest10573-21latency_hist09:15:260
30161993025,4cyclictest10573-21latency_hist09:15:260
30161993025,3cyclictest545-21in:imuxsock08:10:340
30161993025,3cyclictest545-21in:imuxsock08:10:340
30161993023,5cyclictest2154-21needreboot10:20:430
30161993023,5cyclictest2154-21needreboot10:20:430
30161993023,5cyclictest14149-21sshd10:53:190
30161993023,5cyclictest14149-21sshd10:53:190
30161993022,6cyclictest26528-21cut10:00:350
30161993022,6cyclictest26528-21cut10:00:350
30163992923,5cyclictest8195-21unixbench-2d09:05:481
30163992923,5cyclictest8195-21unixbench-2d09:05:481
30163992923,5cyclictest20160-21sshd08:11:191
30163992923,5cyclictest20160-21sshd08:11:191
30161992925,3cyclictest22526-21kernelversion09:45:400
30161992925,3cyclictest22526-21kernelversion09:45:400
30161992923,5cyclictest1938-21kernelversion08:50:410
30161992922,6cyclictest1603-21fschecks_count10:20:380
30161992922,6cyclictest1603-21fschecks_count10:20:380
30161992922,5cyclictest30160-21cyclictest08:40:410
30161992922,5cyclictest30160-21cyclictest08:40:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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