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2026-09-17 - 04:25

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 Sep 17, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22292980,3sleep00-21swapper/000:09:360
22292980,3sleep00-21swapper/000:09:360
14102870,3chrt0-21swapper/100:05:141
22412860,3sleep00-21swapper/019:49:340
22412860,3sleep00-21swapper/019:49:340
62212790,2sleep06222-21grep21:24:410
240742690,3sleep013656-21apache223:39:410
240742690,3sleep013656-21apache223:39:410
276312660,2chrt0-21swapper/219:29:382
21622996256,4cyclictest32402-21wc00:04:240
21622996256,4cyclictest32402-21wc00:04:240
196532590,2sleep019652-21swap20:34:400
112452580,2sleep20-21swapper/200:34:222
112452580,2sleep20-21swapper/200:34:222
72012560,3sleep20-21swapper/220:04:192
72012560,3sleep20-21swapper/220:04:192
184822560,3chrt0-21swapper/320:34:193
184822560,3chrt0-21swapper/320:34:193
13582530,2chrt1357-21entropy21:14:320
13582530,2chrt1357-21entropy21:14:320
23702510,3chrt0-21swapper/022:44:210
23702510,3chrt0-21swapper/022:44:210
323232440,1sleep132481-21/usr/sbin/munin22:34:421
311602430,3sleep30-21swapper/319:39:363
276262430,6sleep027629-21fschecks_count22:24:310
276262430,6sleep027629-21fschecks_count22:24:310
223652430,2sleep20-21swapper/223:34:402
242332420,3sleep00-21swapper/020:49:240
28202410,2sleep20-21swapper/222:44:312
28202410,2sleep20-21swapper/222:44:312
2162299403,30cyclictest32642-21/usr/sbin/munin00:04:320
140212390,3sleep20-21swapper/223:14:352
21625993729,6cyclictest14938-21sendmail00:44:191
21625993729,6cyclictest14938-21sendmail00:44:191
21622993729,6cyclictest11698-21cron23:09:190
21622993729,6cyclictest11698-21cron23:09:190
21625993630,4cyclictest32700-21mailstats21:09:421
21625993630,4cyclictest32700-21mailstats21:09:421
21622993629,5cyclictest1001-21latency_hist21:14:190
21622993629,5cyclictest1001-21latency_hist21:14:190
21622993627,7cyclictest6426-21fschecks_count22:54:310
21622993627,7cyclictest6426-21fschecks_count22:54:310
21622993625,9cyclictest15057-21needreboot21:49:350
21622993625,9cyclictest15057-21needreboot21:49:350
292982350,3chrt0-21swapper/219:34:362
292982350,3chrt0-21swapper/219:34:362
21625993526,7cyclictest31296-21needreboot23:59:361
21625993526,7cyclictest31296-21needreboot23:59:361
16752350,2sleep20-21swapper/221:14:342
16752350,2sleep20-21swapper/221:14:342
275322330,1sleep127630-21/usr/sbin/munin19:29:381
21625993325,6cyclictest24553-21cut20:49:331
2162299339,4cyclictest171ktimers/020:28:010
2162299339,4cyclictest171ktimers/020:28:010
2162299337,5cyclictest171ktimers/000:26:370
21622993325,6cyclictest201rcuc/020:55:310
21622993324,7cyclictest26105-21kernelversion22:19:380
21622993324,7cyclictest26105-21kernelversion22:19:380
94162320,3sleep30-21swapper/322:59:443
94162320,3sleep30-21swapper/322:59:443
94162320,3sleep30-21swapper/322:59:443
21625993225,5cyclictest550-21cron23:04:301
21625993225,5cyclictest550-21cron23:04:301
21625993224,6cyclictest2711-21fschecks_count22:44:301
21625993224,6cyclictest2711-21fschecks_count22:44:301
21625993223,6cyclictest27874-21latency_hist20:59:201
21622993228,3cyclictest13787-21kernelversion00:39:340
21622993228,3cyclictest13787-21kernelversion00:39:340
21622993226,5cyclictest572-21cups-browsed21:59:400
21622993226,5cyclictest572-21cups-browsed21:59:400
21622993226,4cyclictest7735-21gltestperf20:04:320
21622993224,2cyclictest181rcu_preempt21:31:390
21622993220,3cyclictest201rcuc/022:45:340
21622993220,3cyclictest201rcuc/022:45:340
21625993125,4cyclictest21620-21cyclictest21:34:361
21625993125,4cyclictest21620-21cyclictest21:34:361
21625993122,7cyclictest8519-21gltestperf22:59:341
21625993122,7cyclictest8519-21gltestperf22:59:341
21625993122,7cyclictest8519-21gltestperf22:59:341
21625993122,7cyclictest19608-21fschecks_count23:29:321
21625993122,7cyclictest19608-21fschecks_count23:29:321
21622993125,4cyclictest22162-21sshd20:43:440
21622993124,2cyclictest181rcu_preempt20:20:250
21622993124,2cyclictest181rcu_preempt20:20:250
21622993116,2cyclictest181rcu_preempt19:39:320
21622993110,11cyclictest16-21ksoftirqd/021:00:250
21622993110,11cyclictest16-21ksoftirqd/021:00:250
2162899301,22cyclictest32394-21chrt00:04:243
2162899301,22cyclictest32394-21chrt00:04:243
21625993024,4cyclictest12280-21sendmail21:44:191
21625993024,4cyclictest12280-21sendmail21:44:191
21622993024,5cyclictest24470-21fschecks_count20:49:320
21622993014,6cyclictest12588-21strings23:09:370
21622993014,6cyclictest12588-21strings23:09:370
2162799291,23cyclictest32384-21chrt00:04:232
2162799291,23cyclictest32384-21chrt00:04:232
21625992924,3cyclictest0-21swapper/122:34:191
21622992925,3cyclictest21620-21cyclictest23:34:390
21622992923,5cyclictest26633-21sshd23:48:450
21622992922,6cyclictest9027-21fschecks_time21:34:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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