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2025-07-01 - 05:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 20 highest latencies:
System rack9slot4s (updated Tue Jul 01, 2025 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
317049910831054,19cyclictest0-21swapper/019:27:220
299362591544,32sleep00-21swapper/019:20:070
315412561478,41sleep10-21swapper/119:23:511
3170599109101,5cyclictest0-21swapper/119:27:221
3136521020,5sleep041ktimersoftd/023:40:000
53832620,8sleep13170599cyclictest22:30:181
120132580,7sleep10-21swapper/119:55:191
206182470,8sleep03170499cyclictest23:10:180
247452381,33sleep124881-21df20:30:161
3170499364,7cyclictest81rcu_preempt23:53:290
152512361,30sleep114490-21/usr/sbin/munin22:55:271
148912360,8sleep10-21swapper/120:03:371
80502351,4sleep130944-21snmpd00:02:051
3170499351,11cyclictest81rcu_preempt20:53:460
284602351,30sleep128486-21ntp_states23:30:251
250552351,29sleep125074-21ntp_states21:55:281
31705993410,13cyclictest40950irq/93-i91521:30:191
3170499342,14cyclictest7638-21/usr/sbin/munin00:00:280
283022341,27sleep128310-21df_inode22:05:171
59652330,9sleep03170499cyclictest22:30:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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