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2026-06-05 - 22:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack4slot6s.osadl.org (updated Fri Jun 05, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1070722700,3sleep010709-21latency_hist08:30:010
1484022580,3sleep014839-21wc10:50:260
67121910,2sleep0669-21ls12:00:260
962021250,4chrt9621-21/usr/sbin/munin12:35:260
3147721230,4chrt31478-21missed_timers11:55:180
1891421160,3chrt18915-21timerandwakeup11:05:280
1233721150,4chrt12338-21systemctl10:40:250
2438821140,3chrt24391-21wc07:15:270
54321110,2sleep0545-21ls07:50:160
2796421110,4sleep027580-21/usr/sbin/munin09:35:260
900821090,3sleep09023-21munin-run12:35:010
253952980,4sleep025015-21/usr/sbin/munin09:25:260
240202980,3sleep024024-21ntp_states09:20:230
72602920,3sleep07319-21awk08:15:270
15532910,3sleep01561-21latency12:05:160
123932880,3sleep012465-21/usr/sbin/munin08:35:270
22490998662,15cyclictest23308-21runrttasks07:11:250
195432860,4sleep019533-21latency_hist11:10:020
136562850,3sleep013668-21ntp_states08:40:210
22490998158,13cyclictest2937-21/usr/sbin/munin12:10:180
22490998048,21cyclictest17486-21/usr/sbin/munin08:55:180
234852790,2sleep023487-21latency_hist11:25:010
22490997854,14cyclictest3561-21/usr/sbin/munin08:00:260
22490997851,14cyclictest27734-21date07:30:010
22490997850,17cyclictest4158-21/usr/sbin/munin10:10:250
22490997850,17cyclictest19747-21sort09:05:010
22490997755,13cyclictest6007-21/usr/sbin/munin10:15:270
22490997654,14cyclictest1875-21runrttasks10:00:200
22490997649,15cyclictest28996-21ntpq11:45:220
22490997549,15cyclictest27521-21date09:35:010
22490997549,14cyclictest29182-21ntp_states09:40:210
22490997548,18cyclictest26194-21/usr/sbin/munin11:35:150
22490997548,14cyclictest8632-21sendmail_mailst08:20:250
22490997547,16cyclictest5337-21cpu12:20:100
22490997449,14cyclictest5817-21cat08:10:170
22490997449,14cyclictest27428-21wc11:40:090
22490997448,18cyclictest4468-21if_eth008:05:160
22490997447,15cyclictest29094-21df07:35:130
22490997446,19cyclictest16699-21runrttasks08:51:410
22490997352,14cyclictest11554-21runrttasks08:31:470
22490997352,13cyclictest1851-21runrttasks07:55:150
22490997349,15cyclictest17372-21ntp_states11:00:220
22490997348,16cyclictest22939-21cat09:15:290
22490997348,15cyclictest4222-21ntp_kernel_err12:15:170
22490997348,14cyclictest26319-21chrt07:24:490
22490997348,14cyclictest11208-21/usr/sbin/munin10:35:290
22490997347,15cyclictest9273-21date10:30:010
22490997344,16cyclictest946-21ntpd09:45:210
22490997343,17cyclictest14952-21ntp_states08:45:210
22490997340,20cyclictest7041-21ntpq10:20:190
22490997247,14cyclictest23838-21/usr/sbin/munin11:25:210
22490997246,15cyclictest25159-21/usr/sbin/munin11:30:250
22490997244,16cyclictest6576-21/usr/sbin/munin12:25:130
22490997232,13cyclictest20939-21/usr/sbin/munin11:15:120
22490997147,14cyclictest1244-21seq09:58:300
22490997146,15cyclictest32224-21runrttasks07:45:290
22490997144,15cyclictest31992-21timerandwakeup09:50:250
2183327119,29sleep021874-21/usr/sbin/munin07:05:250
22490997047,14cyclictest30816-21runrttasks11:52:210
22490997038,20cyclictest21366-21netstat09:10:180
22490997034,24cyclictest20419-21users09:05:280
22490997028,18cyclictest27618-21seq07:29:580
22490996945,14cyclictest13395-21memory10:45:170
22490996945,13cyclictest31609-21runrttasks07:45:020
22490996944,14cyclictest3053-21latency10:05:180
22490996845,13cyclictest10489-21latency_hist10:35:010
22490996843,15cyclictest17019-21latency_hist11:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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