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2025-05-03 - 00:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Total number of samples: 50.5 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 highest latencies:
System rack5slot7s.osadl.org (updated Fri May 02, 2025 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5382224212184,85sleep00-21swapper07:07:050
57549916413,117cyclictest20140-21apt-get08:35:280
57549916217,121cyclictest25918-21irqstats12:25:400
57549916210,126cyclictest18909-21apt-get08:31:460
57549916115,120cyclictest20368-21apt-get11:56:260
57549916016,119cyclictest18984-21latency_hist08:30:080
57549915916,117cyclictest27336-21apt-get09:21:160
57549915913,26cyclictest23054-21latency_hist12:10:070
57549915817,116cyclictest5531-21wc10:25:020
57549915815,118cyclictest10188-21/usr/sbin/munin07:35:560
57549915814,29cyclictest23326-21kworker/u2:408:55:010
57549915811,123cyclictest2901-21cut10:06:000
57549915717,117cyclictest17344-21df11:35:420
5754991569,121cyclictest6317-21apt-get10:31:070
57549915611,122cyclictest23001-21apt-get12:11:280
57549915610,123cyclictest13529-21cut11:11:100
57549915513,118cyclictest2318-21munin-run10:05:010
57549915422,105cyclictest25950-21diskstats09:10:350
57549915414,25cyclictest1169-21grep09:55:570
57549915413,116cyclictest15250-21memory08:05:440
57549915316,24cyclictest11919-21df_inode07:45:350
57549915314,101cyclictest8610-1kworker/u3:107:50:120
57549915313,25cyclictest21056-21/usr/sbin/munin08:41:050
57549915312,27cyclictest24136-21munin-run09:00:020
57549915231,20cyclictest0-21swapper12:15:310
57549915216,112cyclictest18406-21/usr/sbin/munin11:40:590
57549915216,112cyclictest15315-21users11:21:020
57549915213,116cyclictest9682-21tr07:30:480
57549915213,115cyclictest5964-21diskstats07:10:360
57549915213,114cyclictest8055-21memory07:20:450
57549915211,115cyclictest7974-21grep10:36:110
57549915121,28cyclictest30997-21diskstats09:40:340
57549915114,99cyclictest29967-21munin-run09:35:010
57549915021,28cyclictest30178-21diskstats09:35:340
57549915021,27cyclictest8258-21apt-get10:40:250
57549915020,107cyclictest16594-21apt-get08:15:140
57549915016,111cyclictest14093-21apt08:00:020
57549915014,111cyclictest28034-21munin-run12:40:020
57549915012,24cyclictest16476-21ls11:30:440
57549915011,98cyclictest3573-21grep10:10:550
57549915010,115cyclictest16380-21sort08:11:030
57549914918,104cyclictest25191-21memory12:20:450
57549914913,28cyclictest26536-21/usr/sbin/munin12:30:300
57549914911,23cyclictest11044-21awk10:55:580
57549914836,21cyclictest9318-21latency_hist07:30:030
57549914827,23cyclictest32395-21latency_hist09:50:030
57549914819,28cyclictest6749-21diskstats07:15:170
57549914818,24cyclictest14218-21apt-get08:00:180
57549914816,19cyclictest0-21swapper09:50:150
57549914814,25cyclictest26632-21apt-get09:15:200
57549914813,98cyclictest19944-21sort11:50:460
57549914773,52cyclictest14442-21head11:16:040
57549914729,96cyclictest11880-21wc11:00:560
57549914720,100cyclictest9840-21apt-get10:50:220
57549914714,27cyclictest19231-21/usr/sbin/munin11:45:530
57549914714,109cyclictest25286-21memory09:05:440
57549914713,24cyclictest15643-21grep11:25:440
57549914711,111cyclictest24444-21kernelversion09:00:440
57549914621,100cyclictest29176-21munin-run09:30:030
57549914610,41cyclictest18036-21grep08:21:050
57549914519,21cyclictest22230-21processes08:45:540
57549914514,28cyclictest9047-21/usr/sbin/munin10:45:320
57549914419,25cyclictest4110-21diskstats10:15:350
57549914412,37cyclictest13018-21latency_hist11:10:050
57549914316,105cyclictest5734-21diskstats10:25:330
57549914314,21cyclictest21524-21apt-get12:00:240
57549914214,110cyclictest11254-21memory07:40:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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