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2024-02-24 - 16:11

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 20 highest latencies:
System rack4slot6s.osadl.org (updated Sat Feb 24, 2024 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
688922770,2sleep06888-21/usr/sbin/munin09:35:370
3251522430,2sleep032516-21date09:10:010
1234822150,2sleep012349-21systemctl07:50:390
2394521380,5chrt23943-21users10:40:390
2759821290,3chrt27596-21grep10:55:320
3022121280,4chrt30224-21tr11:05:380
2130121260,3chrt21304-21grep10:30:390
1572121160,3sleep015722-21cat08:05:020
2908521120,3sleep029088-21sort11:00:390
114221050,3sleep01143-21sshd07:07:540
101522970,2sleep010153-21cut11:55:010
197302915,11sleep019755-21idleruntime08:20:250
29972865,9sleep02998-21ntp_states09:20:330
260402866,66sleep026056-21/usr/sbin/munin10:50:220
221862867,65sleep022191-21irqstats10:35:290
208802865,63sleep020923-21cut12:35:350
200782840,2sleep020076-21users10:25:430
51502776,59sleep05186-21if_eth011:35:230
204242730,3sleep020426-21latency_hist12:35:010
1452996310,19cyclictest4626-21sshd09:25:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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