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2026-05-09 - 22:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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: 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 100 highest latencies:
System rack4slot1s.osadl.org (updated Sat May 09, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2003821200,2sleep020040-21grep11:52:270
2003821200,2sleep020040-21grep11:52:270
2003821200,2sleep020040-21grep11:52:270
242121130,3sleep01390-21/usr/sbin/munin11:02:420
242121130,3sleep01390-21/usr/sbin/munin11:02:420
242121130,3sleep01390-21/usr/sbin/munin11:02:420
2929321090,2sleep00-21swapper/009:22:360
2929321090,2sleep00-21swapper/009:22:360
2929321090,2sleep00-21swapper/009:22:360
78472980,3chrt0-21swapper/209:52:332
111222980,2sleep011126-21head11:27:340
111222980,2sleep011126-21head11:27:340
290802780,3sleep20-21swapper/209:22:342
290802780,3sleep20-21swapper/209:22:342
290802780,3sleep20-21swapper/209:22:342
320292740,3chrt32032-21proc_pri08:02:400
320292740,3chrt32032-21proc_pri08:02:400
49092710,2sleep04912-21cut08:17:360
49092710,2sleep04912-21cut08:17:360
49092710,2sleep04912-21cut08:17:360
29802680,3sleep30-21swapper/312:32:343
29802680,3sleep30-21swapper/312:32:343
53922630,2chrt5394-21fschecks_time11:12:321
244562630,4sleep20-21swapper/209:07:472
244562630,4sleep20-21swapper/209:07:472
242382610,1sleep123763-21/usr/sbin/munin07:42:361
242382610,1sleep123763-21/usr/sbin/munin07:42:361
321762580,3sleep20-21swapper/210:57:332
321762580,3sleep20-21swapper/210:57:332
321762580,3sleep20-21swapper/210:57:332
236852570,4chrt0-21swapper/007:42:260
236852570,4chrt0-21swapper/007:42:260
281482530,4chrt0-21swapper/212:12:352
281482530,4chrt0-21swapper/212:12:352
55572520,2sleep20-21swapper/211:12:332
139722510,3sleep00-21swapper/008:42:320
139722510,3sleep00-21swapper/008:42:320
128662480,2sleep113006-21timerandwakeup08:37:441
1267599471,6cyclictest8109-21cat08:27:280
1267599471,6cyclictest8109-21cat08:27:280
1267599471,6cyclictest8109-21cat08:27:280
1267599461,4cyclictest24614-21seq09:09:500
1267599461,4cyclictest24614-21seq09:09:500
1267599440,7cyclictest25390-21chrt12:05:250
1267599440,7cyclictest25390-21chrt12:05:250
1267599430,8cyclictest749-21runrttasks12:24:140
1267599430,8cyclictest749-21runrttasks12:24:140
1267599421,8cyclictest749-21runrttasks12:31:060
1267599421,8cyclictest749-21runrttasks12:31:060
1267599421,8cyclictest749-21runrttasks12:31:060
1267599421,7cyclictest749-21runrttasks09:14:030
1267599421,7cyclictest749-21runrttasks09:14:030
1267599421,7cyclictest749-21runrttasks09:14:030
1267599421,6cyclictest19027-21taskset08:55:050
1267599401,13cyclictest5069-21/usr/sbin/munin11:12:440
1267599395,25cyclictest16313-21unixbench_multi10:12:450
1267599391,10cyclictest2714-21/usr/sbin/munin12:32:420
1267599391,10cyclictest2714-21/usr/sbin/munin12:32:420
1267599391,10cyclictest22673-21df10:32:320
1267599391,10cyclictest22673-21df10:32:320
25572380,2sleep12629-21strings09:37:371
25572380,2sleep12629-21strings09:37:371
12675993828,8cyclictest29120-21cron07:57:200
12675993828,8cyclictest29120-21cron07:57:200
1267599381,9cyclictest30253-21fschecks_count10:52:330
1267599381,9cyclictest12671-21ntp_states08:37:400
1267599381,7cyclictest16829-21basename11:42:340
1267599381,7cyclictest16829-21basename11:42:340
1267599371,8cyclictest8663-21taskset08:27:370
1267599371,8cyclictest8663-21taskset08:27:370
1267599371,7cyclictest8935-21cpu11:22:310
1267599371,7cyclictest8935-21cpu11:22:310
1267599371,7cyclictest23921-21grep07:42:330
1267599371,7cyclictest23921-21grep07:42:330
1267599371,7cyclictest15122-21date10:12:320
1267599371,7cyclictest11519-21fschecks_count10:02:310
1267599371,7cyclictest11519-21fschecks_count10:02:310
1267599371,6cyclictest26338-21/usr/sbin/munin10:42:430
1267599371,6cyclictest26338-21/usr/sbin/munin10:42:430
1267599371,6cyclictest26338-21/usr/sbin/munin10:42:430
1267599371,13cyclictest749-21runrttasks12:12:360
1267599371,13cyclictest749-21runrttasks12:12:360
1267599371,12cyclictest25734-21/usr/sbin/munin10:37:440
1267599371,12cyclictest25734-21/usr/sbin/munin10:37:440
1267599371,12cyclictest25734-21/usr/sbin/munin10:37:440
1267599371,11cyclictest31414-21ntp_states09:27:400
1267599371,11cyclictest31414-21ntp_states09:27:400
1267599371,11cyclictest31414-21ntp_states09:27:400
12676993621,8cyclictest90-1pr/ttyS011:40:191
12676993621,8cyclictest90-1pr/ttyS011:40:191
1267599366,28cyclictest23594-21ls10:32:420
1267599366,28cyclictest23594-21ls10:32:420
1267599366,26cyclictest29347-21/usr/sbin/munin07:57:320
1267599366,26cyclictest29347-21/usr/sbin/munin07:57:320
1267599361,9cyclictest19655-21tune2fs08:57:310
1267599361,8cyclictest8351-21ntp_states09:52:400
1267599361,8cyclictest25907-21gltestperf07:47:330
1267599361,8cyclictest21379-21ls09:02:310
1267599361,8cyclictest21379-21ls09:02:310
1267599361,8cyclictest14678-21systemd-journal11:42:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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