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2025-05-05 - 01:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackfslot4s.osadl.org (updated Sun May 04, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3155821310,2sleep031559-21cat11:05:580
538121230,3chrt5377-21ps09:22:310
2873221170,2chrt28733-21sleep11:57:300
138821170,2chrt1372-21ntpq10:12:150
194821150,2sleep01949-21df11:11:000
1492121150,3chrt14922-21sleep09:39:580
3262421080,3chrt32625-21sleep12:05:170
2900621080,2chrt29007-21sleep10:04:040
1983221060,2sleep019834-21sed07:46:120
1964721020,3chrt19648-21sh08:48:590
53602950,2sleep05361-21grep10:20:010
59132910,2sleep05914-21/usr/sbin/munin07:20:330
139292830,2sleep013928-21ls10:35:080
66492820,2sleep06651-21cut10:21:300
12922820,2sleep01293-21df09:15:590
310432810,2sleep031045-21grep09:11:150
296852800,2sleep029687-21aten2.4_rfpower10:05:490
74582790,2sleep07460-21processes12:17:240
185232740,1sleep018525-21cut12:37:080
162852720,2sleep016283-21aten2.4_rfpower07:40:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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