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2026-04-19 - 05:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot1s.osadl.org (updated Sun Apr 19, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
727221370,3chrt0-21swapper/200:17:172
727221370,3chrt0-21swapper/200:17:172
727221370,3chrt0-21swapper/200:17:172
1234021240,1sleep00-21swapper/000:32:140
233521070,3sleep20-21swapper/200:02:412
233521070,3sleep20-21swapper/200:02:412
67152870,3sleep05973-21/usr/sbin/munin21:22:200
67152870,3sleep05973-21/usr/sbin/munin21:22:200
67152870,3sleep05973-21/usr/sbin/munin21:22:200
310322830,3chrt0-21swapper/221:02:122
310322830,3chrt0-21swapper/221:02:122
310322830,3chrt0-21swapper/221:02:122
260552800,3sleep20-21swapper/219:22:142
172772670,3chrt0-21swapper/223:17:192
172772670,3chrt0-21swapper/223:17:192
126222670,3sleep20-21swapper/200:32:162
126222670,3sleep20-21swapper/200:32:162
216432650,2chrt21640-21ntpq22:02:211
216432650,2chrt21640-21ntpq22:02:211
216432650,2chrt21640-21ntpq22:02:211
8772630,3sleep20-21swapper/200:02:052
8772630,3sleep20-21swapper/200:02:052
16692630,2sleep10-21swapper/119:42:191
16692630,2sleep10-21swapper/119:42:191
103722630,2chrt0-21swapper/221:32:192
103722630,2chrt0-21swapper/221:32:192
272162610,1sleep0201rcuc/020:52:130
215752520,1sleep1271rcuc/120:37:141
215752520,1sleep1271rcuc/120:37:141
215752520,1sleep1271rcuc/120:37:141
303852490,4chrt0-21swapper/223:52:202
303852490,4chrt0-21swapper/223:52:202
20402470,2chrt1984-21cron21:12:041
20402470,2chrt1984-21cron21:12:041
20402470,2chrt1984-21cron21:12:041
184522460,2sleep20-21swapper/220:27:182
184522460,2sleep20-21swapper/220:27:182
184522460,2sleep20-21swapper/220:27:182
172342420,3sleep20-21swapper/221:52:132
172342420,3sleep20-21swapper/221:52:132
172342420,3sleep20-21swapper/221:52:132
2227099402,20cyclictest15162irqstats00:02:171
2227099402,20cyclictest15162irqstats00:02:171
22269994034,4cyclictest674-21gpm21:42:240
22269994034,4cyclictest674-21gpm21:42:240
124382400,2chrt142-21systemd-journal23:04:510
124382400,2chrt142-21systemd-journal23:04:510
257912360,3sleep20-21swapper/222:12:232
257912360,3sleep20-21swapper/222:12:232
22270993628,6cyclictest550-21cron22:57:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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