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2025-05-21 - 01:27

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 May 20, 2025 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
100282335314,4sleep20-21swapper/207:09:102
98052319310,6sleep10-21swapper/107:06:161
97922317304,10sleep30-21swapper/307:06:063
99192314306,5sleep00-21swapper/007:07:420
10360993070,306cyclictest3333-21kworker/u16:0+efi_rts_wq07:24:450
10363993060,305cyclictest25301-21kworker/u16:1+efi_rts_wq09:10:133
10361993050,304cyclictest25301-21kworker/u16:1+efi_rts_wq09:20:151
10363993030,302cyclictest3333-21kworker/u16:0+efi_rts_wq07:39:483
10362993030,302cyclictest25301-21kworker/u16:1+efi_rts_wq10:50:152
10360993020,301cyclictest23200-21kworker/u16:3+efi_rts_wq08:55:010
10362993010,300cyclictest27340-21kworker/u16:1+efi_rts_wq12:05:142
10361993010,300cyclictest29386-21kworker/u16:2+efi_rts_wq07:15:011
10361993010,300cyclictest25301-21kworker/u16:1+efi_rts_wq07:50:141
10360993010,300cyclictest25301-21kworker/u16:1+efi_rts_wq07:59:500
10362993000,299cyclictest23200-21kworker/u16:3+efi_rts_wq09:00:142
10360993000,299cyclictest25301-21kworker/u16:1+efi_rts_wq10:55:140
10360992990,298cyclictest3333-21kworker/u16:0+efi_rts_wq07:25:120
10361992980,297cyclictest27340-21kworker/u16:1+efi_rts_wq12:05:141
10363992970,296cyclictest23200-21kworker/u16:3+efi_rts_wq09:15:143
10361992970,296cyclictest29783-21kworker/u16:2+efi_rts_wq11:50:131
10360992970,295cyclictest21006-21kworker/u16:4+efi_rts_wq11:30:130
10361992960,295cyclictest23200-21kworker/u16:3+efi_rts_wq09:25:061
10361992950,294cyclictest23200-21kworker/u16:3+efi_rts_wq10:00:151
10360992940,293cyclictest13347-21kworker/u16:0+efi_rts_wq11:35:290
10362992930,292cyclictest23200-21kworker/u16:3+efi_rts_wq09:20:052
10360992930,292cyclictest23200-21kworker/u16:3+efi_rts_wq08:20:140
10363992920,291cyclictest27340-21kworker/u16:1+efi_rts_wq12:20:143
10362992920,291cyclictest23200-21kworker/u16:3+efi_rts_wq07:45:162
10361992900,289cyclictest25301-21kworker/u16:1+efi_rts_wq09:40:161
10360992890,288cyclictest27340-21kworker/u16:1+efi_rts_wq12:10:150
10360992890,288cyclictest16170-21kworker/u16:3+efi_rts_wq11:20:140
10362992880,287cyclictest21006-21kworker/u16:4+efi_rts_wq11:20:262
10361992880,287cyclictest23200-21kworker/u16:3+efi_rts_wq09:00:141
10363992850,282cyclictest23200-21kworker/u16:3+efi_rts_wq09:45:153
10362992850,284cyclictest23200-21kworker/u16:3+efi_rts_wq08:50:142
10362992830,282cyclictest29386-21kworker/u16:2+efi_rts_wq07:10:142
10362992830,282cyclictest27340-21kworker/u16:1+efi_rts_wq12:30:132
10362992820,281cyclictest23200-21kworker/u16:3+efi_rts_wq10:30:142
10362992800,279cyclictest23200-21kworker/u16:3+efi_rts_wq09:55:092
10361992800,279cyclictest25301-21kworker/u16:1+efi_rts_wq10:45:141
10361992800,279cyclictest25301-21kworker/u16:1+efi_rts_wq10:45:131
10361992800,279cyclictest25301-21kworker/u16:1+efi_rts_wq10:40:121
10363992790,278cyclictest29386-21kworker/u16:2+efi_rts_wq07:30:143
10363992790,278cyclictest21006-21kworker/u16:4+efi_rts_wq11:35:133
10361992780,277cyclictest3333-21kworker/u16:0+efi_rts_wq07:25:131
10360992770,276cyclictest23200-21kworker/u16:3+efi_rts_wq10:05:120
10363992760,275cyclictest27340-21kworker/u16:1+efi_rts_wq11:40:303
10363992760,275cyclictest25301-21kworker/u16:1+efi_rts_wq08:05:163
10361992740,273cyclictest29783-21kworker/u16:2+efi_rts_wq12:35:131
10363992730,272cyclictest25301-21kworker/u16:1+efi_rts_wq09:20:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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