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2025-04-11 - 22:59

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 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 792 highest latencies:
System rackfslot4s.osadl.org (updated Fri Apr 11, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1856621300,2sleep018565-21/usr/sbin/munin10:22:150
304021180,4chrt3041-21if_eth210:56:020
1104521150,4chrt11028-21ntpq11:11:480
2697421130,2sleep026975-21collect211:42:370
779721080,2chrt7796-21basename07:55:240
2860221080,3chrt28603-21sh10:41:500
1566021060,2chrt15659-21ssh12:25:240
3137121050,2chrt31370-21mailstats07:36:220
1301321050,2chrt13014-21/usr/sbin/munin12:20:350
3086221040,2chrt30863-21sleep10:47:210
1780321030,3chrt17804-21ls12:30:530
3238521020,2chrt32386-21sleep09:46:080
132402840,2sleep013242-21grep08:05:250
88002820,1sleep08802-21aten2.4_rfpower09:00:390
205362780,1sleep020537-21cut12:35:530
76362760,1sleep07637-21/usr/sbin/munin12:10:420
16653907542,12cyclictest30328-21smartctl11:50:510
16653907443,22cyclictest25970-21sshd10:37:260
16653907341,23cyclictest5210-21ntpq09:56:170
16653907242,20cyclictest13416-21diskmemload09:53:530
16653907238,13cyclictest27799-21ntpq09:36:490
16653907140,22cyclictest13416-21diskmemload11:49:580
16653907139,12cyclictest19835-21if_can009:21:030
16653907138,24cyclictest20228-21perl11:30:550
16653907039,22cyclictest765-21sleep08:45:210
16653907039,22cyclictest29109-21python307:32:180
16653907038,13cyclictest7342-21seq10:00:450
16653907038,13cyclictest11037-21hddtemp_smartct08:01:060
16653907037,24cyclictest4629-21users12:02:200
16653907037,23cyclictest31687-21apt-get10:51:030
16653907037,13cyclictest7698-21cron11:05:000
16653906942,19cyclictest11574-21telnet10:10:310
16653906938,22cyclictest21881-21df10:30:370
16653906938,21cyclictest20570-21/usr/sbin/munin08:20:340
16653906938,21cyclictest13641-21ntpq11:16:280
16653906937,21cyclictest7707-21apt-get11:05:300
16653906840,14cyclictest467-21diskstats07:40:330
16653906838,20cyclictest28745-21if_eth108:35:510
16653906838,20cyclictest13416-21diskmemload11:36:160
16653906837,23cyclictest17869-21munin-run08:15:000
16653906837,22cyclictest15444-21chrt09:12:390
16653906837,21cyclictest15175-21ssh10:16:140
16653906836,23cyclictest31571-21memory08:40:490
16653906835,24cyclictest27321-21sleep08:32:220
16653906745,14cyclictest10605-21ssh12:15:540
16653906739,13cyclictest3256-21/usr/sbin/munin07:45:470
16653906738,22cyclictest20275-21/usr/sbin/munin07:16:250
16653906738,21cyclictest6743-21kworker/u2:111:22:000
16653906738,21cyclictest666-21runrttasks11:59:030
16653906738,20cyclictest13395-21kworker/u2:209:30:290
16653906737,20cyclictest29317-21rm09:40:140
16653906736,23cyclictest666-21runrttasks07:51:170
16653906736,22cyclictest9969-21ssh10:05:570
16653906735,13cyclictest19047-21munin-run09:20:030
16653906644,13cyclictest13416-21diskmemload11:26:220
16653906643,14cyclictest3575-21diskstats08:50:340
16653906637,20cyclictest18288-21chrt07:11:570
16653906636,21cyclictest23089-21/usr/sbin/munin08:25:120
16653906541,15cyclictest25966-21ntp_states07:26:140
16653906540,16cyclictest19909-21sshd10:25:250
16653906536,20cyclictest23357-21ssh09:29:300
16653906535,11cyclictest22274-21apt-get07:20:150
16653906534,22cyclictest6573-21irqstats08:55:440
16653906434,21cyclictest5826-21ssh12:05:490
16653906342,13cyclictest11159-21aten2.4_rfpower09:05:230
16653906334,21cyclictest20124-21seq08:18:580
16653906139,13cyclictest16674-21apt-config07:10:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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