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2025-07-15 - 22:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #3

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackcslot3s.osadl.org (updated Tue Jul 15, 2025 12:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30492324317,5sleep20-21swapper/207:08:052
13642319303,5sleep10-21swapper/107:05:071
29762317310,5sleep30-21swapper/307:07:113
30002316308,5sleep00-21swapper/007:07:270
3462992960,295cyclictest6016-21kworker/u16:1+efi_rts_wq09:50:120
3462992960,295cyclictest14712-21kworker/u16:2+efi_rts_wq08:00:140
3464992950,294cyclictest14712-21kworker/u16:2+efi_rts_wq08:17:272
3462992940,293cyclictest21418-21kworker/u16:0+efi_rts_wq11:40:130
3465992920,290cyclictest23717-21kworker/u16:3+efi_rts_wq12:00:123
3464992920,291cyclictest10167-21kworker/u16:3+efi_rts_wq09:25:132
3462992920,291cyclictest10167-21kworker/u16:3+efi_rts_wq09:12:380
3465992890,288cyclictest10167-21kworker/u16:3+efi_rts_wq10:20:133
3465992880,287cyclictest10167-21kworker/u16:3+efi_rts_wq08:40:153
3464992880,287cyclictest23952-21kworker/u16:0+efi_rts_wq10:35:162
3463992880,287cyclictest14712-21kworker/u16:2+efi_rts_wq07:55:151
3463992880,287cyclictest13584-21kworker/u16:0+efi_rts_wq07:45:151
3465992860,285cyclictest13584-21kworker/u16:0+efi_rts_wq08:07:253
3463992860,285cyclictest23952-21kworker/u16:0+efi_rts_wq10:35:141
3462992840,283cyclictest14712-21kworker/u16:2+efi_rts_wq08:25:160
3463992830,282cyclictest10167-21kworker/u16:3+efi_rts_wq09:40:131
3465992820,279cyclictest6016-21kworker/u16:1+efi_rts_wq10:05:143
3464992820,281cyclictest21418-21kworker/u16:0+efi_rts_wq12:05:122
3462992820,281cyclictest13584-21kworker/u16:0+efi_rts_wq08:35:120
3465992810,280cyclictest6016-21kworker/u16:1+efi_rts_wq09:05:143
3465992800,279cyclictest14712-21kworker/u16:2+efi_rts_wq07:15:013
3464992800,279cyclictest18114-21kworker/u16:2+efi_rts_wq11:30:132
3463992800,279cyclictest11343-21kworker/u16:1+efi_rts_wq11:53:081
3465992780,277cyclictest18114-21kworker/u16:2+efi_rts_wq10:40:153
3463992770,276cyclictest11343-21kworker/u16:1+efi_rts_wq11:15:121
3464992760,274cyclictest11343-21kworker/u16:1+efi_rts_wq11:25:132
3463992760,275cyclictest10167-21kworker/u16:3+efi_rts_wq09:32:421
3465992750,274cyclictest13584-21kworker/u16:0+efi_rts_wq08:37:313
3465992750,274cyclictest11343-21kworker/u16:1+efi_rts_wq11:55:133
3465992750,274cyclictest10167-21kworker/u16:3+efi_rts_wq08:52:353
3462992750,274cyclictest11343-21kworker/u16:1+efi_rts_wq11:18:020
3464992740,273cyclictest18114-21kworker/u16:2+efi_rts_wq10:57:592
3463992740,273cyclictest23717-21kworker/u16:3+efi_rts_wq12:20:131
3465992730,272cyclictest13584-21kworker/u16:0+efi_rts_wq07:45:143
3465992720,271cyclictest13584-21kworker/u16:0+efi_rts_wq07:35:133
3463992720,271cyclictest13584-21kworker/u16:0+efi_rts_wq08:35:111
3462992720,271cyclictest14712-21kworker/u16:2+efi_rts_wq07:17:170
3464992710,270cyclictest6016-21kworker/u16:1+efi_rts_wq10:05:152
3464992690,268cyclictest23717-21kworker/u16:3+efi_rts_wq12:20:132
3464992690,267cyclictest18114-21kworker/u16:2+efi_rts_wq10:50:142
3465992680,267cyclictest21418-21kworker/u16:0+efi_rts_wq11:33:043
3462992680,267cyclictest13584-21kworker/u16:0+efi_rts_wq07:20:140
3463992670,266cyclictest13584-21kworker/u16:0+efi_rts_wq08:20:151
3462992670,266cyclictest23717-21kworker/u16:3+efi_rts_wq11:50:190
3462992650,264cyclictest21418-21kworker/u16:0+efi_rts_wq12:25:130
3465992620,261cyclictest23717-21kworker/u16:3+efi_rts_wq12:10:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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