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2024-07-27 - 03:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Fri Jul 26, 2024 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
260941199507500,4cyclictest2667309-21turbostat09:50:003
260941199507497,7cyclictest2654677-21turbostat09:15:003
260940799507498,6cyclictest2700029-21turbostat11:24:552
260940799483456,24cyclictest2642088-21turbostat08:44:552
260940799475448,24cyclictest2685386-21turbostat10:44:562
260940799475448,24cyclictest2685386-21turbostat10:44:552
260941199474453,17cyclictest2642088-21turbostat08:40:003
260941199474449,22cyclictest2633185-21turbostat08:19:553
260941199470431,20cyclictest2625942-21turbostat07:59:553
260941199466457,5cyclictest2724421-21turbostat12:34:563
260941199464457,4cyclictest2624123-21turbostat07:54:553
260941199464455,6cyclictest2681694-21turbostat10:30:003
260941199463456,4cyclictest2688944-21turbostat10:54:553
260941199460453,4cyclictest2720952-21turbostat12:24:553
260941199460451,6cyclictest2618726-21turbostat07:39:553
260941199460451,6cyclictest2618726-21turbostat07:39:553
260941199460436,21cyclictest2620562-21turbostat07:44:553
260941199459452,4cyclictest2706992-21turbostat11:44:543
260941199459452,4cyclictest2705254-21turbostat11:39:563
260941199459452,4cyclictest2705254-21turbostat11:39:553
260941199458451,4cyclictest2690741-21turbostat10:59:553
260941199455448,4cyclictest2703534-21turbostat11:30:003
260941199454447,4cyclictest2663752-21turbostat09:40:013
260941199452444,5cyclictest2622339-21turbostat07:49:553
260941199449441,5cyclictest2629638-21turbostat08:05:003
260941199445436,6cyclictest2631418-21turbostat08:14:553
260941199442434,5cyclictest2719225-21turbostat12:19:553
260941199439431,5cyclictest2652899-21turbostat09:10:013
260941199439415,20cyclictest2656452-21turbostat09:20:003
260941199437429,5cyclictest2613376-21turbostat07:20:003
260941199435428,4cyclictest2679909-21turbostat10:24:593
260940799435428,4cyclictest2694293-21turbostat11:09:552
260941199434423,8cyclictest2636748-21turbostat08:29:553
260941199433426,4cyclictest2674577-21turbostat10:10:013
260941199430423,4cyclictest2715636-21turbostat12:05:013
260941199430423,4cyclictest2715636-21turbostat12:05:003
260941199430421,6cyclictest2683605-21turbostat10:35:003
260941199429422,4cyclictest2667309-21turbostat09:54:553
260941199429422,4cyclictest2667309-21turbostat09:54:553
260941199426419,4cyclictest2687177-21turbostat10:49:553
260941199426401,22cyclictest2724421-21turbostat12:30:003
260941199425417,5cyclictest2651116-21turbostat09:05:003
260941199424416,5cyclictest2678127-21turbostat10:20:003
260941199423403,17cyclictest2672791-21turbostat10:05:013
260939799423416,4cyclictest2713894-21turbostat12:04:560
260939799423416,4cyclictest2713894-21turbostat12:04:550
260941199422415,4cyclictest2717491-21turbostat12:14:553
260941199420413,4cyclictest2658236-21turbostat09:29:553
260941199420412,5cyclictest2645790-21turbostat08:54:553
260941199419397,19cyclictest2698292-21turbostat11:14:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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