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2026-04-15 - 02:30

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 376 highest latencies:
System rack4slot6s.osadl.org (updated Wed Apr 15, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2632122100,2sleep026320-21wc23:10:160
2482221280,3chrt24758-21latency_hist23:05:010
2157021270,2sleep021572-21grep22:50:270
28950991229,15cyclictest15651-21/usr/sbin/munin00:35:180
28950991228,17cyclictest22281-21/usr/sbin/munin22:55:260
28950991209,14cyclictest17250-21/usr/sbin/munin20:30:260
28950991208,14cyclictest11252-21uptime22:10:260
28950991189,18cyclictest8161-21df_inode22:00:130
28950991188,15cyclictest26910-21/usr/sbin/munin21:05:290
28950991179,14cyclictest4032-21/usr/sbin/munin23:50:180
28950991177,14cyclictest20310-21users22:45:290
1461221170,4chrt14610-21df22:25:120
28950991167,14cyclictest17122-21/usr/sbin/munin22:35:130
289509911611,16cyclictest16265-21ntp_states20:25:240
28950991159,14cyclictest28987-21sed19:10:010
28950991158,17cyclictest607-21seq21:30:210
28950991158,16cyclictest10258-21chrt00:14:140
28950991158,14cyclictest15101-21/usr/sbin/munin20:20:250
28950991149,17cyclictest4414-21df_inode19:40:130
28950991149,15cyclictest4286-21ls19:40:010
28950991149,13cyclictest27502-21df23:15:140
28950991149,13cyclictest1515-21seq19:29:050
28950991147,15cyclictest5605-21/usr/sbin/munin23:55:210
28950991147,15cyclictest31182-21chrt23:29:500
28950991147,14cyclictest12016-21df_inode22:15:130
289509911430,73cyclictest14700-21/usr/sbin/munin00:30:240
289509911410,14cyclictest9576-21seq20:00:130
28950991139,16cyclictest6633-21/usr/sbin/munin00:00:120
28950991139,15cyclictest25645-21/usr/sbin/munin21:00:300
28950991138,15cyclictest3852-21seq21:43:010
289509911332,70cyclictest28105-21/usr/sbin/munin21:10:270
289509911331,71cyclictest209-21dbus-daemon21:00:000
28950991129,16cyclictest31808-21ntp_states21:25:220
28950991128,14cyclictest18434-21/usr/sbin/munin22:40:260
28950991128,12cyclictest12400-21users00:20:300
28950991127,16cyclictest12834-21chrt20:11:370
28950991127,15cyclictest29135-21basename19:10:140
28950991127,15cyclictest21319-21irqstats20:45:170
28950991127,15cyclictest10595-21cat22:10:010
289509911211,14cyclictest29059-21ntp_states23:20:220
289509911210,18cyclictest13517-21irqstats20:15:170
289509911210,14cyclictest8272-21entropy19:55:140
28950991118,14cyclictest10911-21mailstats00:15:250
28950991118,13cyclictest399-21latency_hist19:25:020
28950991118,13cyclictest17064-21latency_hist22:35:020
28950991117,15cyclictest32701-21fw_packets23:35:140
28950991117,15cyclictest30106-21munin-run21:20:020
28950991117,13cyclictest7123-21sed19:50:170
28950991117,12cyclictest20486-21users20:40:300
289509911132,70cyclictest1882-21/usr/sbin/munin23:40:260
28950991108,13cyclictest31622-21ntp_states23:30:210
28950991108,13cyclictest1949-21memory19:30:170
28950991108,13cyclictest13149-21df_inode00:25:140
28950991107,14cyclictest7924-21/usr/sbin/munin00:05:210
28950991106,14cyclictest5507-21/usr/sbin/munin21:50:250
28950991105,14cyclictest8001-21sed22:00:020
289509911010,16cyclictest4273-21df21:45:130
2529921100,4chrt25296-21awk23:05:260
28950991099,17cyclictest3041-21ntp_states23:45:230
28950991097,16cyclictest30242-21/usr/sbin/munin21:20:190
289509910910,18cyclictest216-21rs:main0
28950991089,18cyclictest1714-21/usr/sbin/munin21:35:150
28950991089,14cyclictest18932-21wc20:35:250
28950991089,13cyclictest11089-21ntp_states20:05:220
28950991087,16cyclictest13417-21irqstats22:20:170
28950991067,12cyclictest30465-21/usr/sbin/munin19:15:160
28950991066,13cyclictest22743-21ntp_states20:50:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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