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2026-03-17 - 10:29

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 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: 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 100 highest latencies:
System rack5slot7s.osadl.org (updated Tue Mar 17, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4272224322185,98sleep00-21swapper19:06:210
47289916316,123cyclictest15930-21munin-run20:15:020
47289916219,26cyclictest6035-21ntp_states22:31:320
47289916116,119cyclictest11703-21apt-get19:47:070
47289916016,119cyclictest25856-21apt-get00:35:260
47289915815,106cyclictest272-21snmpd22:28:290
47289915812,25cyclictest23287-21munin-run00:20:020
47289915718,116cyclictest5519-21munin-run19:15:030
47289915717,25cyclictest7242-21apt22:40:020
47289915712,43cyclictest31217-21apt-get21:51:490
47289915617,115cyclictest10438-21memory19:41:320
47289915617,114cyclictest24327-21/usr/sbin/munin00:25:350
47289915520,24cyclictest28118-21apt-get21:30:170
47289915517,38cyclictest30625-21df21:45:280
47289915516,25cyclictest5628-21munin-node22:40:130
47289915416,25cyclictest9873-21sendmail19:40:010
47289915416,25cyclictest23314-21/usr/sbin/munin21:00:340
47289915415,101cyclictest3193-21df22:15:260
47289915411,119cyclictest26957-21wc21:20:560
47289915339,93cyclictest2805-21/usr/sbin/munin22:10:590
47289915318,110cyclictest26410-21munin-run21:20:030
47289915317,110cyclictest21151-21irqstats00:05:350
47289915312,22cyclictest23670-21wc00:20:450
47289915219,25cyclictest18674-21df_inode23:50:290
47289915217,108cyclictest9126-21irqstats22:50:400
47289915216,24cyclictest12999-21irqstats19:55:390
47289915216,116cyclictest20360-21irqstats00:00:380
47289915216,109cyclictest16032-21apt-get20:15:190
47289915216,108cyclictest18450-21/usr/sbin/munin20:30:590
47289915130,101cyclictest16945-21latency_hist23:40:060
47289915129,20cyclictest0-21swapper20:00:590
47289915118,94cyclictest8851-21apt22:50:010
47289915114,114cyclictest21888-21diskstats00:10:320
47289915110,117cyclictest17636-21/usr/sbin/munin23:41:040
47289915037,93cyclictest5835-21munin-node19:15:210
47289915015,28cyclictest8484-21df_inode19:30:300
47289915015,25cyclictest24995-21apt-get00:30:170
47289915014,95cyclictest6935-21sshd19:20:360
47289915014,94cyclictest13658-21sendmail23:20:010
47289915014,116cyclictest12037-21apt-get19:50:160
47289915014,114cyclictest11991-21head23:06:030
47289915013,96cyclictest22024-21grep20:50:550
47289915013,23cyclictest1830-21awk22:05:510
47289915012,38cyclictest12522-21wc23:10:540
47289914917,36cyclictest29612-21munin-run21:40:020
47289914917,104cyclictest16864-21apt-get20:20:170
47289914916,27cyclictest24105-21/usr/sbin/munin21:05:220
47289914915,110cyclictest29829-21df21:40:250
47289914912,24cyclictest10561-21kworker/u2:123:00:060
47289914910,26cyclictest27326-21kworker/u2:121:55:160
47289914910,116cyclictest4070-21sshd22:20:350
47289914827,82cyclictest0-21swapper21:00:060
47289914814,36cyclictest15591-21sort23:30:420
47289914814,21cyclictest20066-21munin-run00:00:030
47289914811,96cyclictest19329-21cstates20:35:240
47289914722,28cyclictest7581-21apt-get19:25:200
47289914717,105cyclictest14541-21df20:05:230
47289914717,102cyclictest20862-21apt-get20:45:180
47289914714,109cyclictest20695-21grep20:41:030
47289914712,111cyclictest27750-21wc21:25:580
47289914711,113cyclictest25191-21tr21:10:470
47289914617,27cyclictest9743-21/usr/sbin/munin22:55:360
47289914616,106cyclictest14572-21apt-get23:25:200
47289914513,25cyclictest17655-21munin-node20:25:110
47289914418,23cyclictest14019-21memory23:20:430
47289914412,25cyclictest17773-21/usr/sbin/munin23:46:030
47289914316,25cyclictest712-21/usr/sbin/munin22:00:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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