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2025-02-06 - 14:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 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: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot6s.osadl.org (updated Thu Feb 06, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1657722710,3sleep016579-21awk12:15:260
126421350,3chrt1267-21sort11:10:130
1516221240,3chrt15164-21latency_hist09:50:020
124621210,2sleep01248-21mailstats08:50:320
6995211718,75sleep07043-21ps07:05:230
79039911287,14cyclictest26113-21/usr/sbin/munin08:20:290
79039911286,15cyclictest32308-21chrt08:45:250
79039911083,16cyclictest21058-21ntp_states12:35:250
79039911081,17cyclictest8813-21runrttasks11:40:290
79039910983,15cyclictest22676-21chrt10:20:210
79039910978,17cyclictest13073-21sendmail-msp09:40:010
79039910880,18cyclictest12535-21date07:30:010
79039910880,16cyclictest18501-21sshd12:23:530
79039910879,17cyclictest2063-21/usr/sbin/munin08:55:170
79039910781,15cyclictest16862-21/usr/sbin/munin09:55:250
79039910682,13cyclictest15236-21df_inode09:50:090
79039910681,14cyclictest12648-21sh07:30:090
79039910680,14cyclictest18434-21seq10:00:530
79039910679,15cyclictest8119-21runrttasks07:10:170
79039910582,14cyclictest20632-21ntp_states08:00:210
79039910579,15cyclictest18932-21sshd12:26:330
79039910579,14cyclictest28605-21/usr/sbin/munin08:30:290
79039910579,13cyclictest21749-21seq10:16:090
79039910578,16cyclictest17575-21runrttasks07:49:370
79039910578,15cyclictest31676-21chrt08:43:450
79039910577,15cyclictest19717-21seq07:56:050
79039910577,15cyclictest10181-21latency_hist11:50:010
79039910573,19cyclictest4930-21awk09:05:210
79039910572,17cyclictest22654-21sshd08:08:550
79039910482,13cyclictest19534-21df12:30:090
79039910481,13cyclictest32151-21users11:00:290
79039910481,13cyclictest31421-21munin-run11:00:010
79039910479,14cyclictest19616-21runrttasks10:09:450
79039910478,16cyclictest16233-21chrt07:44:090
79039910478,15cyclictest9549-21chrt09:23:170
79039910478,15cyclictest13251-21df09:40:130
79039910477,17cyclictest19964-21chrt10:10:140
79039910477,15cyclictest9970-21chrt07:16:080
79039910477,15cyclictest11716-21seq07:24:450
79039910476,17cyclictest6582-21chrt11:32:490
79039910476,15cyclictest10772-21load09:30:130
79039910466,24cyclictest2382-21/usr/sbin/munin11:15:140
79039910378,15cyclictest10267-21chrt09:28:210
79039910374,17cyclictest888-21chrt11:09:210
79039910370,20cyclictest22922-21/usr/sbin/munin08:10:150
79039910278,14cyclictest269-21runrttasks10:29:090
79039910278,13cyclictest24429-21df_inode10:30:090
79039910278,13cyclictest10564-21ntp_states11:50:170
79039910277,12cyclictest7374-21sendmail_mailqu11:35:250
79039910276,16cyclictest29242-21ntp_states10:50:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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