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2026-01-09 - 17:04

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 50 highest latencies:
System rack4slot6s.osadl.org (updated Fri Jan 09, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1716822620,2sleep017170-21missed_timers12:05:180
3013921290,2sleep030137-21cat08:45:010
55789912011,22cyclictest357-21memory11:00:180
55789911829,17cyclictest19719-21runrttasks08:04:430
55789911728,17cyclictest31099-21runrttasks08:47:490
55789911631,74cyclictest9705-21/usr/sbin/munin09:30:250
55789911631,73cyclictest14420-21/usr/sbin/munin11:55:120
55789911623,15cyclictest9284-21/usr/sbin/munin11:35:120
55789911611,23cyclictest9562-21/usr/sbin/munin07:25:190
5578991159,17cyclictest24065-21ntpq08:20:210
5578991158,17cyclictest2821-21runrttasks11:10:140
55789911528,15cyclictest27292-21runrttasks08:33:220
55789911528,14cyclictest15637-21runrttasks07:48:040
5578991147,15cyclictest14830-21ntp_states09:50:220
55789911433,68cyclictest404-21/usr/sbin/munin08:55:140
55789911431,71cyclictest32010-21/usr/sbin/munin08:50:250
55789911428,14cyclictest13289-21sh07:39:590
55789911427,13cyclictest22029-21runrttasks10:18:580
55789911425,13cyclictest22330-21latency_hist08:15:020
55789911410,17cyclictest17340-21df07:55:130
5578991138,18cyclictest276-21runrttasks11:41:220
55789911311,18cyclictest20711-21munin-run12:20:020
55789911310,18cyclictest11941-21irqstats11:45:150
5578991129,15cyclictest13531-21ntpq09:45:180
5578991119,16cyclictest23701-21ntp_states12:30:210
5578991118,27cyclictest13364-21ntp_states11:50:200
5578991118,19cyclictest8108-21/usr/sbin/munin09:25:150
5578991118,15cyclictest20875-21latency_hist10:15:020
55789911131,70cyclictest16367-21runrttasks12:01:080
55789911128,14cyclictest11610-21runrttasks09:38:170
55789911125,10cyclictest0-21swapper07:15:250
55789911122,16cyclictest31326-21cpu10:55:110
463521110,4sleep04656-21ntp_states07:05:190
3033921110,2sleep030337-21ntp_states10:50:240
5578991108,18cyclictest25537-21sshd10:30:540
55789911020,16cyclictest17391-21ntpq10:00:180
55789911010,16cyclictest7105-21ntp_states09:20:210
55789911010,15cyclictest25343-21ntp_states08:25:220
5578991099,16cyclictest6932-21ntp_states11:25:230
5578991099,16cyclictest5056-21sshd11:18:540
5578991099,15cyclictest24695-21/usr/sbin/munin12:35:130
5578991098,16cyclictest19947-21df_inode08:05:120
5578991097,17cyclictest2921-21/usr/sbin/munin09:05:270
55789910931,68cyclictest18511-21runrttasks10:05:220
55789910923,14cyclictest19093-21runrttasks12:12:290
55789910923,13cyclictest5114-21runrttasks09:12:560
55789910922,14cyclictest285-21sshd10:41:540
55789910920,12cyclictest276-21runrttasks09:56:360
55789910915,14cyclictest24375-21runrttasks10:26:540
55789910911,20cyclictest5799-21ntpq09:15:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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