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2024-07-16 - 15:42

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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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: 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 Mon Jul 15, 2024 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1540721260,2chrt15398-21diskstats12:25:490
2699821240,2chrt26995-21ld09:51:510
339521220,2chrt3394-21ssh10:07:240
2545321150,3chrt25449-21aten2.4-expect11:45:330
557721130,2chrt5561-21ssh11:10:240
1356921090,2chrt13570-21ssh09:29:260
836121040,3chrt8362-21sleep08:17:460
2576321040,2chrt25764-21sleep07:49:290
1377921040,2chrt13780-21sleep08:28:110
792521030,2chrt7926-21sleep07:14:180
1763321020,2chrt17636-21cut09:36:210
628721000,3chrt6288-21sh08:14:440
310912990,2chrt31092-21sh07:59:370
8622970,2chrt863-21sleep08:03:160
203322910,2sleep020333-21sh09:41:100
198112820,3chrt19805-21diskstats08:40:340
226812790,2sleep022682-21ssh10:42:020
561590775,12cyclictest18121-21df12:30:380
5615907712,56cyclictest28811-21df_inode09:55:440
561590768,58cyclictest28190-21irqstats08:55:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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