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2026-05-03 - 02:49

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Sun May 03, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1464922530,3sleep014646-21grep23:35:250
2576521530,2sleep025766-21basename00:20:010
9936213721,92sleep010000-21users19:05:250
580121280,3chrt5799-21users23:00:270
3124721280,3sleep031248-21sh20:30:000
106159911810,92cyclictest6726-21df21:00:130
106159911630,75cyclictest27220-21/usr/sbin/munin00:25:110
106159911530,75cyclictest32704-21/usr/sbin/munin20:35:110
3259121140,4chrt32592-21/usr/sbin/munin22:40:130
106159911432,72cyclictest20962-21/usr/sbin/munin21:55:140
10615991137,89cyclictest22178-21/usr/sbin/munin22:00:130
106159911331,73cyclictest26166-21/usr/sbin/munin22:15:160
10615991128,92cyclictest30908-21munin-run00:40:020
10615991127,90cyclictest19705-21wc19:45:010
10615991118,90cyclictest25889-21/usr/sbin/munin00:20:250
10615991118,90cyclictest17275-21mailstats23:45:250
10615991118,89cyclictest9579-21threads23:15:260
10615991116,92cyclictest29647-21ls00:35:010
106159911122,80cyclictest276-21runrttasks22:20:180
10615991109,87cyclictest31488-21ntp_states22:35:210
10615991107,90cyclictest1621-21ntp_states22:45:210
10615991107,88cyclictest3126-21/usr/sbin/munin20:45:250
106159911033,67cyclictest32537-21munin-plugin-st20:35:000
10615991098,89cyclictest3322-21chrt22:51:170
10615991098,89cyclictest25975-21date22:15:020
10615991098,87cyclictest11631-21cut23:25:010
10615991097,88cyclictest29372-21runrttasks22:26:330
10615991097,88cyclictest1802-21seq20:40:220
10615991097,88cyclictest16904-21seq19:33:570
10615991087,89cyclictest10826-21ntp_states21:15:210
10615991086,88cyclictest13038-21fw_packets23:30:130
3008521070,5sleep030108-21/usr/sbin/munin22:30:190
2760021070,2sleep027599-21/usr/sbin/munin20:15:130
10615991078,87cyclictest6295-21chrt20:58:130
10615991078,87cyclictest5145-21latency_hist23:00:020
10615991078,87cyclictest13506-21memory19:20:170
10615991077,86cyclictest14590-21seq19:25:050
10615991077,85cyclictest6691-21memory23:05:180
10615991076,89cyclictest15856-21irqstats21:35:180
106159910727,68cyclictest17905-21runrttasks21:42:490
106159910724,72cyclictest27066-21runrttasks20:12:350
10615991069,85cyclictest25325-21find20:05:250
10615991069,84cyclictest12931-21sed23:30:010
10615991068,87cyclictest211-21in:imuxsock21:10:050
10615991068,85cyclictest23581-21ls20:00:020
10615991067,86cyclictest24070-21mailstats20:00:250
106159910630,65cyclictest19480-21/usr/sbin/munin23:55:140
106159910610,81cyclictest18745-21cat21:45:250
10615991059,84cyclictest12104-21awk21:20:170
10615991058,86cyclictest13821-21seq21:26:060
10615991058,84cyclictest20742-21latency_hist21:55:010
10615991057,86cyclictest4515-21sendmail_mailtr20:50:260
10615991056,85cyclictest21702-21runrttasks19:50:570
10615991056,84cyclictest7961-21/usr/sbin/munin21:05:290
106159910524,60cyclictest24416-21runrttasks22:08:190
10615991047,85cyclictest23907-21runrttasks00:10:380
10615991046,86cyclictest17580-21awk19:35:250
10615991046,85cyclictest11176-21seq19:10:260
106159910410,82cyclictest28914-21/usr/sbin/munin20:20:130
10615991038,85cyclictest276-21runrttasks19:45:490
10615991038,71cyclictest14718-21ntp_states21:30:230
10615991036,87cyclictest7845-21df_inode23:10:130
10615991036,84cyclictest15760-21missed_timers23:40:170
10615991027,84cyclictest18779-21chrt23:50:580
10615991027,83cyclictest22002-21/usr/sbin/munin00:05:170
106159910129,62cyclictest20688-21latency_hist00:00:030
10615991008,79cyclictest12000-21/usr/sbin/munin19:15:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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