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2026-05-26 - 21:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack9slot4s (updated Tue May 26, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210889912401213,21cyclictest32084-21strings07:50:211
210889912401213,21cyclictest32084-21strings07:50:211
208382672626,30sleep10-21swapper/107:22:591
206992532451,65sleep00-21swapper/007:21:270
2108799179157,6cyclictest0-21swapper/007:50:210
2108799179157,6cyclictest0-21swapper/007:50:210
2108799145122,4cyclictest21254-21aten_r4power_cu07:25:100
210642640,3sleep10-21swapper/108:45:281
170822471,28sleep017133-21swap08:35:290
193842460,5sleep021085-21cyclictest10:10:000
2108899383,18cyclictest29461-21/usr/sbin/munin07:45:321
2108799371,12cyclictest180432cut11:30:220
21087993711,13cyclictest19651-21hddtemp_smartct11:35:170
148402361,31sleep114920-21memory08:30:211
2108799351,15cyclictest0-21swapper/010:39:580
2108799349,6cyclictest21247-21awk10:15:000
2108799341,9cyclictest12298-21/usr/sbin/munin09:50:130
2108899335,4cyclictest81rcu_preempt09:09:331
2108799339,12cyclictest25411-21iostat_ios11:50:210
21088993215,14cyclictest26243-21cat07:35:191
2108799323,26cyclictest6376-21kworker/0:309:45:390
21087993224,5cyclictest24676-21switchtime08:55:260
2108799321,8cyclictest0-21swapper/010:56:340
2108799321,12cyclictest28307-21missed_timers07:40:210
197782321,5sleep119845-21memory11:35:221
171352321,5sleep10-21swapper/108:35:291
49072311,4sleep15029-21users12:20:301
232742311,5sleep10-21swapper/108:53:001
2108899316,7cyclictest81rcu_preempt12:35:011
21088993116,11cyclictest22-21ksoftirqd/111:40:131
21088993111,6cyclictest26764-21aten_r4power_po11:55:111
2108799316,12cyclictest0-21swapper/008:00:150
2108799315,13cyclictest2347-21munin-run09:25:010
2108799312,14cyclictest26018-21perl09:00:170
2108799311,4cyclictest81rcu_preempt12:11:560
160422310,2chrt16043-21mailstats12:50:260
92442301,5sleep10-21swapper/111:06:251
78712301,5sleep10-21swapper/109:38:041
316602301,5sleep10-21swapper/110:40:271
289172301,5sleep10-21swapper/107:41:051
2108899302,7cyclictest6607-21iostat_ios11:00:201
21088993020,6cyclictest17493-21basename10:05:001
2108899301,5cyclictest81rcu_preempt12:25:081
2108899301,4cyclictest81rcu_preempt12:05:291
2108799309,6cyclictest18277-21taskset08:40:120
2108799308,7cyclictest28421-21munin-run12:00:000
2108799303,4cyclictest81rcu_preempt10:28:380
2108799302,15cyclictest0-21swapper/011:17:540
2108799302,15cyclictest0-21swapper/011:17:540
2108799302,14cyclictest29274-21memory12:00:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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