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2026-05-11 - 06:33

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 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 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot6s.osadl.org (updated Mon May 11, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
915022530,2sleep09152-21timerwakeupswit23:45:300
2690522500,2sleep026903-21fw_packets22:50:150
752222450,3sleep07521-21latency_hist19:30:010
493621200,3chrt4934-21df21:25:100
1051021180,3chrt10512-21mailstats21:45:260
2863921150,4chrt28640-21timerandwakeup22:55:270
2480921130,3chrt24806-21grep22:40:250
1929921100,3chrt19296-21cat22:20:200
2134921050,3sleep021364-21munin-run00:35:010
1829221050,4sleep018365-21/usr/sbin/munin22:15:280
99242930,3sleep09964-21latency_hist21:45:020
157128019,33sleep01647-21/usr/sbin/munin19:05:240
204302780,3sleep020428-21df22:25:120
2358997738,23cyclictest7299-21/usr/sbin/munin23:40:320
2358997648,15cyclictest15608-21ps22:05:250
2358997450,14cyclictest19104-21/usr/sbin/munin00:25:180
2358997344,16cyclictest1508-21awk21:10:250
2358997149,13cyclictest2294-21/usr/sbin/munin23:20:180
2358997147,14cyclictest7690-21seq19:30:130
2358997147,13cyclictest1636-21seq23:17:130
2358997146,16cyclictest11798-21runrttasks19:45:230
2358997146,14cyclictest32460-21ntp_states21:05:260
2358997145,16cyclictest4603-21seq21:23:450
2358997144,15cyclictest13007-21/usr/sbin/munin19:50:170
2358997048,14cyclictest15328-21latency_hist20:00:020
2358997044,14cyclictest26125-21which20:40:250
2358997042,15cyclictest26299-21runrttasks22:46:460
2358997042,14cyclictest22102-21ntpq20:25:210
2358996947,12cyclictest19740-21cat20:15:270
2358996946,14cyclictest3710-21runrttasks23:25:200
2358996944,15cyclictest15380-21/usr/sbin/munin20:00:190
2358996944,14cyclictest13817-21/usr/sbin/munin00:05:150
2358996943,16cyclictest7431-21modprobe21:35:010
2358996942,18cyclictest32275-21ntp_states23:10:220
2358996942,17cyclictest17925-21ntp_states00:20:210
2358996928,16cyclictest16993-21sshd22:10:260
2358996845,14cyclictest5778-21runrttasks19:21:250
2358996845,14cyclictest30835-21latency_hist21:00:010
2358996845,14cyclictest16733-21df_inode20:05:130
2358996845,14cyclictest13581-21runrttasks00:04:440
2358996844,15cyclictest22103-21/usr/sbin/munin22:30:260
2358996843,14cyclictest12134-21seq21:52:100
2358996842,15cyclictest6944-21sshd23:38:250
2358996842,15cyclictest21772-21ls20:25:020
2358996841,14cyclictest2560-21ntpq21:15:220
2358996840,16cyclictest288-21snmpd00:16:100
2358996840,15cyclictest10633-21mailstats19:40:250
2358996839,16cyclictest21926-21cat00:35:250
2358996834,21cyclictest25577-21munin-run20:40:000
2358996832,24cyclictest12904-21ntp_states21:55:230
2358996744,14cyclictest6166-21seq21:30:090
2358996744,13cyclictest28228-21latency_hist20:50:010
2358996743,13cyclictest4923-21/usr/sbin/munin19:20:010
2358996739,16cyclictest2645-21memory19:10:170
2358996735,19cyclictest15030-21/usr/sbin/munin00:10:300
2358996644,13cyclictest14601-21runrttasks22:01:020
2358996643,13cyclictest24117-21munin-run22:40:020
2358996642,13cyclictest30934-21df_inode21:00:130
2358996639,16cyclictest9073-21/usr/sbin/munin19:35:180
2358996638,17cyclictest30302-21sshd23:02:450
2358996633,21cyclictest12187-21seq23:59:080
2358996621,15cyclictest18035-21/usr/sbin/munin20:10:140
2358996619,20cyclictest23121-21/usr/sbin/munin20:30:110
2358996543,12cyclictest4830-21if_eth023:30:160
2358996542,14cyclictest10851-21runrttasks23:53:400
2358996542,13cyclictest29439-21latency_hist20:55:010
2358996136,15cyclictest30837-21interrupts23:05:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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