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2026-07-26 - 04:01

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 Sun Jul 26, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
864121380,3sleep08636-21timerwakeupswit21:53:550
864121380,3sleep08636-21timerwakeupswit21:53:550
246072920,3sleep30-21swapper/322:38:443
82032910,3sleep30-21swapper/323:18:563
82032910,3sleep30-21swapper/323:18:563
221052900,3sleep30-21swapper/323:58:443
221052900,3sleep30-21swapper/323:58:443
144762860,2chrt0-21swapper/222:08:562
83622780,2sleep08363-21/usr/sbin/munin20:28:440
83622780,2sleep08363-21/usr/sbin/munin20:28:440
228082700,2sleep00-21swapper/022:33:470
232722640,1chrt0-21swapper/021:08:440
232722640,1chrt0-21swapper/021:08:440
214352630,3sleep30-21swapper/321:03:453
214352630,3sleep30-21swapper/321:03:453
12696995747,6cyclictest0-21swapper/000:03:490
12696995747,6cyclictest0-21swapper/000:03:490
87162550,2chrt0-21swapper/320:28:473
87162550,2chrt0-21swapper/320:28:473
198382550,3sleep30-21swapper/320:58:463
198382550,3sleep30-21swapper/320:58:463
12696995342,7cyclictest0-21swapper/000:03:360
12696995342,7cyclictest0-21swapper/000:03:360
216362470,2chrt21635-21mailstats22:28:531
216362470,2chrt21635-21mailstats22:28:531
55552420,3sleep30-21swapper/321:48:353
55552420,3sleep30-21swapper/321:48:353
181692410,3sleep20-21swapper/223:48:382
1270199411,10cyclictest23883-21fschecks_count19:43:571
1270199411,10cyclictest23883-21fschecks_count19:43:571
69222390,3sleep30-21swapper/320:23:493
69222390,3sleep30-21swapper/320:23:493
306932390,3sleep00-21swapper/021:28:420
12701993922,15cyclictest8542-21switchtime21:53:541
12701993922,15cyclictest8542-21switchtime21:53:541
1270199391,10cyclictest17161-21sshd20:51:591
1270199391,10cyclictest17161-21sshd20:51:591
99062380,2sleep09908-21if_wlan021:58:450
99062380,2sleep09908-21if_wlan021:58:450
319062380,3chrt0-21swapper/320:03:513
319062380,3chrt0-21swapper/320:03:513
18032380,4sleep30-21swapper/323:03:443
18032380,4sleep30-21swapper/323:03:443
12701993832,4cyclictest2847-21fschecks_count00:33:451
12701993824,12cyclictest0-21swapper/100:28:311
12701993824,12cyclictest0-21swapper/100:28:311
1270199381,8cyclictest13425-21taskset20:42:271
1270199381,8cyclictest13425-21taskset20:42:271
1270199381,10cyclictest9044-21mailstats20:28:531
1270199381,10cyclictest9044-21mailstats20:28:531
1270199381,10cyclictest749-21runrttasks22:51:311
1270199381,10cyclictest749-21runrttasks22:51:311
1270199381,10cyclictest26308-21ntp_states19:48:521
1270199381,10cyclictest26308-21ntp_states19:48:521
1270199380,10cyclictest749-21runrttasks00:40:181
1270199380,10cyclictest749-21runrttasks00:40:181
31362370,3sleep00-21swapper/021:38:550
31362370,3sleep00-21swapper/021:38:550
1270199371,9cyclictest749-21runrttasks19:57:491
1270199371,9cyclictest749-21runrttasks19:57:491
1270199371,8cyclictest31917-21ntp_states20:03:511
1270199371,8cyclictest31917-21ntp_states20:03:511
1270199371,8cyclictest28995-21fschecks_time21:23:451
12701993710,25cyclictest20829-21sendmail_mailst19:33:511
12696993728,7cyclictest30470-21threads00:18:550
143692360,4chrt0-21swapper/320:43:473
143692360,4chrt0-21swapper/320:43:473
12701993631,3cyclictest28529-21/usr/sbin/munin00:13:521
12701993631,3cyclictest28529-21/usr/sbin/munin00:13:521
1270199361,9cyclictest20106-21users22:23:561
1270199361,9cyclictest20106-21users22:23:561
1270199361,7cyclictest2358-21taskset00:32:441
1270199361,7cyclictest2358-21taskset00:32:441
1270199361,6cyclictest30915-21/usr/sbin/munin22:53:531
1270199361,6cyclictest30915-21/usr/sbin/munin22:53:531
1270199361,6cyclictest23853-21sshd22:33:591
12701993616,18cyclictest0-21swapper/120:18:311
1270199361,10cyclictest7902-21mailstats23:18:541
1270199361,10cyclictest7902-21mailstats23:18:541
1270199361,10cyclictest3060-21latency_hist23:08:331
1270199361,10cyclictest3060-21latency_hist23:08:331
1270199361,10cyclictest22535-21ls23:58:471
1270199361,10cyclictest22535-21ls23:58:471
1270199360,9cyclictest6392-21sshd23:13:591
1270199360,9cyclictest6392-21sshd23:13:591
1270199360,8cyclictest15192-21sshd20:45:361
1270199360,8cyclictest15192-21sshd20:45:361
1270199360,11cyclictest2670-21ntp_states21:38:511
1270199360,11cyclictest2670-21ntp_states21:38:511
249152350,2sleep125018-21memory22:38:471
1270199356,6cyclictest4719-21cat21:43:531
1270199356,6cyclictest4719-21cat21:43:531
1270199351,9cyclictest6861-21/usr/sbin/munin21:48:551
1270199351,9cyclictest6861-21/usr/sbin/munin21:48:551
1270199351,9cyclictest23870-21/usr/sbin/munin00:03:541
1270199351,9cyclictest23870-21/usr/sbin/munin00:03:541
1270199351,8cyclictest6256-21/usr/sbin/munin20:23:551
1270199351,8cyclictest6256-21/usr/sbin/munin20:23:551
1270199351,8cyclictest17188-21grep23:43:511
1270199351,7cyclictest1117-21latency_hist23:03:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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