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2026-03-12 - 11:36

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 Thu Mar 12, 2026 00:44:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2446121400,2chrt24464-21cron20:31:261
2446121400,2chrt24464-21cron20:31:261
67642830,2sleep05915-40mandb00:01:420
67642830,2sleep05915-40mandb00:01:420
41982820,2sleep30-21swapper/322:26:493
41982820,2sleep30-21swapper/322:26:493
180612760,1chrt18059-21ntpq00:31:440
300242650,2chrt595-21sshd20:45:440
300242650,2chrt595-21sshd20:45:440
193192640,3sleep30-21swapper/320:16:403
193192640,3sleep30-21swapper/320:16:403
109802640,3sleep30-21swapper/319:51:483
136052540,2sleep20-21swapper/221:26:422
136052540,2sleep20-21swapper/221:26:422
257902510,1sleep125805-21latency_hist22:01:271
257902510,1sleep125805-21latency_hist22:01:271
257902510,1sleep125805-21latency_hist22:01:271
104222510,2sleep20-21swapper/221:16:492
104222510,2sleep20-21swapper/221:16:492
34532500,2sleep03469-21grep21:01:330
34532500,2sleep03469-21grep21:01:330
3562480,2chrt0-21swapper/322:16:483
3562480,2chrt0-21swapper/322:16:483
174082480,1sleep00-21swapper/020:11:390
207252470,2sleep20-21swapper/200:40:182
207252470,2sleep20-21swapper/200:40:182
11882470,3sleep20-21swapper/222:21:372
191172460,4sleep20-21swapper/200:36:322
11102450,3sleep30-21swapper/319:26:443
120492430,3sleep00-21swapper/022:51:140
5102420,3sleep20-21swapper/219:26:392
179502420,3sleep20-21swapper/220:11:452
99182390,2sleep20-21swapper/222:42:442
99182390,2sleep20-21swapper/222:42:442
17552390,3sleep30-21swapper/322:21:423
17552390,3sleep30-21swapper/322:21:423
4572380,2sleep132168-21/usr/sbin/munin20:51:451
293762380,2sleep20-21swapper/223:36:382
293762380,2sleep20-21swapper/223:36:382
106452380,2sleep10-21swapper/119:51:461
27435993732,3cyclictest547-21rs:main0
27435993732,3cyclictest547-21rs:main0
27435993730,5cyclictest547-21rs:main0
27435993730,5cyclictest547-21rs:main0
205172370,2sleep020617-21awk23:11:450
139482370,4chrt0-21swapper/320:01:413
139482370,4chrt0-21swapper/320:01:413
27435993629,5cyclictest32276-21netstat22:16:430
27435993629,5cyclictest32276-21netstat22:16:430
197982360,3sleep00-21swapper/020:16:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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