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2025-08-21 - 21:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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.
Unexpectedly long latencies may be caused by SMIs
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 rack7slot4s.osadl.org (updated Thu Aug 21, 2025 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1318899542,44cyclictest28448-21ssh12:35:130
1318899542,44cyclictest28448-21ssh12:35:130
1318899514,39cyclictest10697-21ssh12:25:140
1318899503,40cyclictest25470-21ssh10:55:130
13216994537,5cyclictest25366irq/58-eth009:45:123
1318899451,37cyclictest30708-21ssh11:20:130
13216994424,7cyclictest25366irq/58-eth011:30:123
1318899432,32cyclictest9210-21ssh10:00:160
13216994117,15cyclictest25366irq/58-eth011:05:133
1318899410,10cyclictest24208-21apt-get07:55:120
13188993918,18cyclictest12-21ksoftirqd/009:25:120
1318899391,29cyclictest31131-21ssh12:00:160
1318899361,9cyclictest17038-21ntpq11:30:230
1318899361,8cyclictest1954-21fschecks_time12:20:170
1318899361,7cyclictest31291-21cut10:35:210
1318899361,7cyclictest31291-21cut10:35:210
1319799353,29cyclictest31293-21ssh10:15:121
1318899351,9cyclictest962-21tr07:30:200
1318899351,7cyclictest12285-21ssh09:40:170
1318899351,11cyclictest11926-21apt-get08:50:010
1318899350,9cyclictest15821-21latency_hist08:20:020
1318899350,9cyclictest15821-21latency_hist08:20:020
1318899350,8cyclictest22800-21ntp_states07:50:260
1318899341,9cyclictest3410-21kthreadcore11:00:220
1318899341,9cyclictest24766-21tr10:10:200
1318899341,9cyclictest17895-21apt-get07:15:020
1318899341,7cyclictest9629-21cut11:05:210
1318899341,7cyclictest23535-21ssh11:55:190
1318899340,10cyclictest448-21kthreadcore08:35:210
1319799331,29cyclictest29584-21ssh11:40:121
1318899339,21cyclictest31152-21diskmemload10:34:120
1318899331,9cyclictest3199966kernelversion10:15:180
1318899331,9cyclictest24319-21timerandwakeup08:25:300
1318899331,9cyclictest18223-21kthreadcore11:10:210
1318899331,6cyclictest8978-21latency_hist10:00:010
1318899331,10cyclictest17078-21kthreadcore09:20:220
1318899325,6cyclictest8354-21kthreadcore12:05:150
1318899325,5cyclictest10236-21sed07:40:190
1318899325,4cyclictest31152-21diskmemload11:50:210
1318899321,9cyclictest30478-21cut11:40:190
1318899321,9cyclictest29318-21interrupts08:00:190
1318899321,9cyclictest13685-21ssh10:25:120
1318899321,8cyclictest28641-21cut08:30:220
1318899321,8cyclictest22299-21awk10:50:260
1318899321,7cyclictest6094-21tr10:40:210
1318899321,7cyclictest5161-21apt11:45:110
1318899321,7cyclictest28400-21irqrtprio07:25:200
1318899321,7cyclictest22163-21grep09:00:180
1318899321,7cyclictest13490-21fschecks_count07:10:150
1318899321,7cyclictest10775-21ntp_192.168.11408:45:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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