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2026-04-09 - 14:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 rackfslot4s.osadl.org (updated Thu Apr 09, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1410921650,2sleep014108-21sed19:05:310
2271121340,2sleep022712-21cat19:20:040
1632321240,2chrt16318-21irqstats20:00:440
2351221200,3chrt23508-21ps22:42:120
1027021190,2chrt10271-21irqrtprio23:11:030
1103321150,3chrt11034-21runrttasks19:51:560
510721130,2chrt5108-21chrt20:35:310
830121120,2chrt8302-21sleep23:56:350
348421120,2chrt3485-21sh21:23:530
2023721120,3chrt20238-21grep22:37:140
1504421120,4chrt15042-21/usr/sbin/munin00:06:440
1949221110,2chrt19491-21seq00:13:430
987021100,1sleep09871-21runrttasks21:32:530
232021100,2chrt2319-21grep22:10:510
1246621100,2chrt12467-21sleep22:26:000
2729721090,2chrt27298-21sleep23:36:190
2841821070,1sleep028419-21grep21:12:250
1358321070,3chrt13582-21ssh21:38:500
2578721050,2chrt25788-21runrttasks00:22:490
2333921050,2sleep023342-21latency_hist21:05:030
1047821050,3chrt10479-21sh20:44:090
122521040,2chrt1226-21runrttasks00:35:060
375421010,3chrt3755-21sh20:32:480
237552980,2sleep023756-21df21:05:290
170422970,2sleep017043-21chrt21:44:070
171022960,2sleep017103-21chrt19:10:360
97202940,2sleep09721-21chrt22:21:220
8462900,1sleep0848-21rm00:34:290
276592890,4chrt27633-21df00:26:010
48092880,1sleep04810-21seq23:02:450
230342880,3chrt22662-21apt-get23:30:470
73722870,2sleep07373-21chrt21:29:510
12602860,1sleep01261-21seq23:46:050
261302840,2sleep026131-21stty19:25:240
313532830,2sleep031354-21chrt22:54:330
326112810,1sleep032609-21open_files22:07:100
233552810,2chrt23341-21hddtemp_smartct19:20:390
296582800,1sleep029659-21hostname23:40:330
224882760,2sleep022487-21seq23:30:070
129662740,2sleep012967-21chrt00:04:000
206202730,2sleep020621-21chrt21:49:440
282152720,2sleep028251-21cut22:50:000
157242720,2sleep015725-21fschecks_time22:30:540
204432630,2sleep020445-21cut00:15:320
234942520,1sleep023495-21runrttasks21:53:410
303322500,1sleep030333-21sh22:04:050
174132500,2sleep017416-21chrt23:21:450
16451904918,23cyclictest0-21swapper22:17:570
16451904918,21cyclictest0-21swapper23:52:500
16451904717,21cyclictest0-21swapper23:19:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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