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2026-06-28 - 13:24

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Sun Jun 28, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
594122310,3sleep05942-21latency_hist19:45:010
1650821460,2sleep016510-21switchtime00:35:260
1597521400,3sleep015977-21latency_hist00:35:020
1163121240,4chrt11629-21users22:10:300
370521210,2sleep03702-21ps21:40:250
992221100,3sleep09921-21wc00:10:270
516321080,2sleep05166-21sort21:45:270
3110221080,4chrt31103-21cat21:20:280
293649910273,15cyclictest20081-21/usr/sbin/munin22:45:250
144821020,3sleep01447-21grep19:25:280
293649910174,16cyclictest16825-21mailstats20:25:260
293649910173,16cyclictest29432-21irqstats21:15:180
293649910173,16cyclictest26477-21cat23:10:010
293649910073,17cyclictest1899-21df_inode23:40:140
293649910071,17cyclictest6339-21ntp_states19:45:220
73272990,3sleep07334-21grep19:50:100
7032990,3sleep0753-21/usr/sbin/munin21:30:100
29364999972,17cyclictest29797-21/usr/sbin/munin19:10:260
29364999972,16cyclictest18182-21chrt22:36:130
29364999968,21cyclictest20423-21/usr/sbin/munin20:40:180
29364999772,14cyclictest14413-21chrt20:15:420
29364999673,13cyclictest2307-21irqstats19:30:140
29364999671,15cyclictest10402-21runrttasks20:00:260
29364999670,14cyclictest2281-21ntp_states21:35:220
29364999670,13cyclictest24731-21chrt20:55:380
29364999664,19cyclictest31013-21users23:25:290
29364999570,16cyclictest3712-21users23:45:290
29364999570,15cyclictest3641-21seq19:35:180
29364999569,17cyclictest9207-21users19:55:300
29364999568,15cyclictest21826-21ntp_states20:45:220
29364999567,15cyclictest15681-21seq22:26:460
29364999566,17cyclictest7341-21memory21:55:180
29364999565,18cyclictest18798-21/usr/sbin/munin22:40:290
29364999470,13cyclictest14245-21/usr/sbin/munin22:20:300
29364999468,15cyclictest27298-21seq23:11:490
29364999468,15cyclictest10909-21df00:15:130
29364999467,15cyclictest21509-21irqstats22:50:170
29364999467,14cyclictest8880-21users00:05:290
29364999456,22cyclictest27861-21df23:15:110
29364999368,15cyclictest25182-21seq23:05:010
29364999368,15cyclictest12503-21open_inodes00:20:250
29364999367,15cyclictest6464-21users21:50:300
29364999367,14cyclictest11499-21ntp_states20:05:220
29364999365,15cyclictest32139-21netstat21:25:220
29364999364,16cyclictest6843-21modprobe00:00:000
29364999363,17cyclictest28264-21awk21:10:190
29364999269,13cyclictest7282-21ntp_states00:00:210
29364999268,14cyclictest16341-21irqstats22:30:140
29364999267,14cyclictest32310-21vmstat23:30:290
29364999267,13cyclictest27898-21ls21:10:020
29364999169,14cyclictest22869-21df20:50:100
29364999168,13cyclictest32129-21df_inode19:20:140
29364999167,12cyclictest30910-21latency19:15:180
29364999166,14cyclictest845-21sshd23:35:240
29364999165,15cyclictest13731-21/usr/sbin/munin00:25:220
29364999165,14cyclictest23887-21wc23:00:020
29364999067,13cyclictest17853-21memory20:30:180
29364999066,13cyclictest9901-21irqstats22:05:180
29364999065,14cyclictest29322-21memory23:20:170
29364999063,15cyclictest12984-21wc20:10:260
29364999060,19cyclictest15397-21ntp_states20:20:240
29364998967,12cyclictest12367-21df22:15:100
29364998965,16cyclictest4686-21ntp_states23:50:210
29364998965,14cyclictest20122-21munin-run20:40:020
29364998965,12cyclictest25604-21memory21:00:180
29364998961,15cyclictest9520-21chrt22:04:100
2893828814,14sleep00-21swapper19:06:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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