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2026-06-04 - 20:16

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 792 highest latencies:
System rack5slot7s.osadl.org (updated Thu Jun 04, 2026 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21691224272184,99sleep00-21swapper07:07:580
219659917118,127cyclictest5518-21munin-run12:00:020
219659916417,122cyclictest11584-21apt-get09:20:350
219659916218,119cyclictest7304-21apt-get12:10:240
219659916017,117cyclictest30162-21df_inode07:55:290
21965991599,130cyclictest2079-21munin-run11:40:050
219659915919,116cyclictest28162-21apt-get07:46:450
219659915917,25cyclictest27111-21apt-get07:41:300
219659915916,122cyclictest22610-21wc07:11:020
219659915741,24cyclictest8758-21missed_timers09:00:450
219659915714,120cyclictest23280-21df_inode10:30:280
219659915711,123cyclictest9699-21awk09:05:540
21965991569,31cyclictest24719-21cat10:40:050
219659915617,23cyclictest5702-21apt-get08:45:250
219659915613,21cyclictest25497-21sshd07:26:280
219659915518,27cyclictest2243-21apt-get11:40:320
219659915514,117cyclictest6738-21apt-get08:50:330
219659915514,101cyclictest6544-21df_inode12:05:310
219659915513,118cyclictest29110-21diskstats11:05:580
219659915513,114cyclictest23271-21cstates07:15:410
219659915416,115cyclictest1745-21df_inode08:20:290
219659915412,118cyclictest4558-21awk11:50:590
219659915410,27cyclictest19638-21cut10:05:580
219659915410,26cyclictest17414-21sshd09:52:290
219659915328,103cyclictest0-21swapper11:45:290
219659915317,113cyclictest12178-21munin-run12:40:030
219659915312,25cyclictest5523-21sshd08:41:340
219659915311,119cyclictest24454-21find07:20:550
219659915311,118cyclictest3647-21zcat08:30:540
21965991529,44cyclictest12784-21systemd-journal09:26:290
219659915216,24cyclictest26524-21diskstats07:35:290
219659915216,23cyclictest26623-21memory10:50:450
219659915215,26cyclictest8372-21munin-plugin-st09:00:010
219659915215,22cyclictest14328-21apt-get09:35:200
219659915215,115cyclictest878-21awk11:30:490
219659915213,113cyclictest21941-21wc10:20:510
219659915212,113cyclictest589-21grep08:11:020
219659915211,36cyclictest2849-21awk08:25:550
21965991519,23cyclictest15366-21latency09:40:420
219659915124,107cyclictest10307-21sendmail_mailqu12:25:540
219659915122,29cyclictest13644-21diskstats09:30:330
219659915117,27cyclictest22065-21kworker/u2:107:50:150
219659915114,25cyclictest25616-21/usr/sbin/munin07:31:000
219659915110,119cyclictest20042-21snmpd08:01:060
21965991509,26cyclictest10785-21df_inode12:30:280
219659915015,22cyclictest25690-21df_inode10:45:280
219659915015,112cyclictest30723-21df_inode11:15:290
219659914922,27cyclictest29825-21apt-get11:10:260
219659914920,29cyclictest4131-21df_inode08:35:300
219659914915,21cyclictest28001-21apt-get11:00:110
219659914914,112cyclictest23072-21apt10:30:010
219659914913,113cyclictest441-21users11:26:050
219659914912,24cyclictest27881-21munin-run11:00:020
219659914911,37cyclictest5886-21grep12:00:440
219659914911,36cyclictest1230-21grep08:15:550
219659914911,114cyclictest11582-21sh09:20:010
219659914910,116cyclictest20950-21wc10:15:410
219659914820,101cyclictest20118-21irqstats10:10:380
219659914816,108cyclictest18357-21apt-get10:00:130
219659914815,24cyclictest31550-21df11:20:260
219659914814,29cyclictest22868-21munin-node09:45:110
219659914716,26cyclictest25328-21/usr/sbin/munin10:40:590
219659914715,25cyclictest8258-21/usr/sbin/munin12:15:420
219659914713,37cyclictest31672-21/usr/sbin/munin08:05:340
219659914617,104cyclictest9089-21/usr/sbin/munin12:20:470
219659914611,25cyclictest10254-21irqstats09:10:410
219659914528,22cyclictest0-21swapper09:55:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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