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2024-07-27 - 03:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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: 100 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 rackeslot6s.osadl.org (updated Fri Jul 26, 2024 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
175656599108101,5cyclictest311ktimers/212:10:172
175656599841,34cyclictest30-21rcuc/208:45:192
175656499707,27cyclictest1774564-21cat08:55:011
1756561997029,35cyclictest0-21swapper/007:35:290
1756561996624,35cyclictest0-21swapper/012:30:280
175656199662,27cyclictest1765154-21unixbench_singl07:55:280
175656199651,2cyclictest0-21swapper/011:05:010
1756561996422,36cyclictest0-21swapper/008:30:010
1756561996421,35cyclictest21450irq/209-8000000.ethernet07:15:030
1756561996343,18cyclictest1805897-21munin-plugin-st12:00:000
1756561996343,18cyclictest1805897-21munin-plugin-st12:00:000
1756561996326,32cyclictest0-21swapper/010:30:270
1756565996220,9cyclictest1796757-21/usr/sbin/munin11:05:172
1756561996221,35cyclictest0-21swapper/008:05:170
175656199611,2cyclictest0-21swapper/012:15:020
175656199605,10cyclictest1775726-21cut09:00:210
1756561996028,27cyclictest0-21swapper/011:05:280
1756561996025,26cyclictest0-21swapper/008:40:170
1756561996023,32cyclictest0-21swapper/007:45:290
1756561996023,32cyclictest0-21swapper/007:45:290
1756565995813,21cyclictest32-21ksoftirqd/211:00:012
175656199583,6cyclictest1762400-21tail07:40:280
1756561995824,31cyclictest1763922-21grep07:50:230
1756561995823,31cyclictest21450irq/209-8000000.ethernet11:25:320
1756561995823,29cyclictest0-21swapper/009:55:240
1756561995818,30cyclictest0-21swapper/007:10:280
175656199581,4cyclictest1788128-21apt10:15:000
1756561995733,21cyclictest1767753-21munin-plugin-st08:15:000
1756561995723,30cyclictest0-21swapper/009:15:270
175656199571,4cyclictest1782629-21cut09:40:200
175656199571,4cyclictest1782629-21cut09:40:200
1756561995711,8cyclictest1811207-21gpg-connect-age12:30:010
175656199571,15cyclictest1779574-21grep09:20:310
1756561995625,23cyclictest0-21swapper/009:35:160
1756561995616,35cyclictest0-21swapper/011:20:260
1756561995616,10cyclictest0-21swapper/008:55:220
175656199561,14cyclictest1780414-21head09:25:280
175656199561,10cyclictest1771975-21lockfile-create08:40:010
1756561995543,7cyclictest1786436-21kworker/u8:0+events_power_efficient10:25:110
175656199551,24cyclictest0-21swapper/010:50:160
175656199548,9cyclictest1784287-21sh09:50:200
175656199545,10cyclictest1793977-21grep10:45:290
175656199543,7cyclictest1789759-21grep10:20:300
175656199542,13cyclictest1769368-21grep08:20:300
1756564995339,9cyclictest1782237-21sendmail09:40:001
175656199534,9cyclictest1804970-21grep11:50:290
1756561995332,17cyclictest0-21swapper/009:30:320
1756561995322,28cyclictest0-21swapper/011:10:270
1756561995320,4cyclictest1812812-21munin-run12:40:000
175656199531,24cyclictest0-21swapper/008:15:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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