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2025-07-12 - 11:05

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 50 highest latencies:
System rack4slot1s.osadl.org (updated Sat Jul 12, 2025 00:44:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1317821660,2sleep10-21swapper/100:06:431
1317821660,2sleep10-21swapper/100:06:431
3085621260,2sleep130855-21missed_timers23:26:481
3085621260,2sleep130855-21missed_timers23:26:481
2296621260,2sleep022969-21fschecks_time23:06:450
2296621260,2sleep022969-21fschecks_time23:06:450
1037521140,8sleep0171ktimers/019:41:510
1037521140,8sleep0171ktimers/019:41:510
266321000,2sleep00-21swapper/023:37:000
266321000,2sleep00-21swapper/023:37:000
232792660,3sleep00-21swapper/020:16:450
232792660,3sleep00-21swapper/020:16:450
147652640,2sleep20-21swapper/200:11:312
147652640,2sleep20-21swapper/200:11:312
83262600,2sleep18364-21ntp_states22:26:511
210982600,2chrt21100-21sed20:11:340
210982600,2chrt21100-21sed20:11:340
20372520,2sleep11879-21latency_hist20:46:371
3091599482,42cyclictest663-21runrttasks19:51:441
238012450,2sleep20-21swapper/200:31:572
238012450,2sleep20-21swapper/200:31:572
99882440,1sleep00-21swapper/022:31:470
99882440,1sleep00-21swapper/022:31:470
210062440,3sleep20-21swapper/220:11:322
210062440,3sleep20-21swapper/220:11:322
91382430,2sleep09139-21cut23:56:370
30915994234,5cyclictest0-21swapper/120:31:411
30915994228,10cyclictest281ktimers/123:46:421
30915994228,10cyclictest281ktimers/123:46:421
257622420,4sleep0171ktimers/021:46:530
30914994134,5cyclictest25721-21netstat20:21:530
30914994134,5cyclictest25721-21netstat20:21:530
97052400,3sleep30-21swapper/323:56:483
30915993927,8cyclictest0-21swapper/122:56:431
3091499384,31cyclictest13119-21taskset00:06:410
3091499384,31cyclictest13119-21taskset00:06:410
70382370,3sleep20-21swapper/220:56:552
3091499372,4cyclictest181rcu_preempt22:01:440
3091499372,4cyclictest181rcu_preempt22:01:440
246792370,2sleep024711-21fschecks_count23:11:480
204922370,3sleep020496-21latency_hist00:26:320
204922370,3sleep020496-21latency_hist00:26:320
30915993631,4cyclictest30913-21cyclictest00:11:471
30915993631,4cyclictest30913-21cyclictest00:11:471
3091499365,27cyclictest11132-21chrt00:01:440
3091499365,27cyclictest11132-21chrt00:01:440
30914993630,4cyclictest30913-21cyclictest22:51:480
30914993630,4cyclictest30913-21cyclictest22:51:480
3091499361,6cyclictest181rcu_preempt21:41:430
3091499361,6cyclictest181rcu_preempt21:41:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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