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2026-04-10 - 13:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Fri Apr 10, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28249211187,18sleep00-21swapper/019:06:000
28249211187,18sleep00-21swapper/019:05:590
28176210998,6sleep20-21swapper/219:05:222
28176210998,6sleep20-21swapper/219:05:222
28203210897,6sleep10-21swapper/119:05:371
28203210897,6sleep10-21swapper/119:05:371
28830210584,16sleep30-21swapper/319:08:233
28830210584,16sleep30-21swapper/319:08:223
59472790,1sleep212764-21diskmemload22:10:132
312072790,0sleep30-21swapper/322:36:033
293042750,0sleep10-21swapper/120:30:131
163882700,1sleep10-21swapper/121:46:231
163532690,0sleep00-21swapper/000:36:540
62652670,13sleep12898499cyclictest23:52:121
28984993716,19cyclictest0-21swapper/119:45:121
272672260,1sleep30-21swapper/323:06:023
50702240,0sleep20-21swapper/222:42:592
2898499210,19cyclictest0-21swapper/122:20:121
263412210,0sleep20-21swapper/200:13:582
2898499209,9cyclictest20458-21fschecks_time22:25:151
2898499202,3cyclictest14632-21wc00:01:001
2898499201,2cyclictest3157-21lldpd21:25:191
2898499200,3cyclictest0-21swapper/121:00:111
2898499200,18cyclictest0-21swapper/121:21:531
2898499200,12cyclictest0-21swapper/121:57:581
2898499190,3cyclictest0-21swapper/119:15:151
2898499190,13cyclictest0-21swapper/100:32:131
2898499190,12cyclictest0-21swapper/100:26:041
134362190,1sleep00-21swapper/000:34:360
2898499186,3cyclictest0-21swapper/123:28:111
2898499181,8cyclictest17901-21munin-node1
2898499181,3cyclictest25335-21modprobe22:30:161
2898499181,15cyclictest0-21swapper/121:05:151
2898499180,2cyclictest0-21swapper/122:46:351
2898499180,2cyclictest0-21swapper/122:46:341
2898499180,11cyclictest0-21swapper/100:06:261
2898699171,13cyclictest0-21swapper/321:45:053
28985991714,2cyclictest8772-21kworker/u8:223:00:042
28985991714,2cyclictest8772-21kworker/u8:222:53:052
28985991714,2cyclictest26601-21kworker/u8:222:33:052
2898499179,7cyclictest0-21swapper/122:56:411
2898499176,3cyclictest2792-21munin-node1
2898499175,3cyclictest8863-21cat19:40:001
2898499174,3cyclictest0-21swapper/100:11:051
2898499171,7cyclictest0-21swapper/122:51:031
2898499171,6cyclictest0-21swapper/121:12:201
2898499171,6cyclictest0-21swapper/100:15:131
2898499171,3cyclictest0-21swapper/123:41:531
2898499171,3cyclictest0-21swapper/123:34:201
2898499171,2cyclictest0-21swapper/121:37:501
2898499171,14cyclictest0-21swapper/122:35:161
2898499171,14cyclictest0-21swapper/122:05:131
2898499171,13cyclictest27464-21grep20:25:141
2898499170,5cyclictest0-21swapper/123:11:021
2898499170,2cyclictest0-21swapper/123:19:021
2898499170,1cyclictest0-21swapper/121:51:061
2898499170,16cyclictest0-21swapper/100:22:531
2898499170,15cyclictest23291-21timerandwakeup23:36:031
2898499170,15cyclictest0-21swapper/123:57:521
2898699161,13cyclictest0-21swapper/322:20:133
2898499167,2cyclictest0-21swapper/120:05:591
2898499164,2cyclictest0-21swapper/123:20:151
2898499163,3cyclictest5293-21df20:50:131
2898499163,3cyclictest21730-21missed_timers23:00:161
2898499163,3cyclictest1599-21ntp_kernel_err20:40:161
2898499163,3cyclictest0-21swapper/121:40:041
2898499163,3cyclictest0-21swapper/120:00:121
2898499161,6cyclictest0-21swapper/122:15:011
2898499161,5cyclictest0-21swapper/121:30:161
2898499161,3cyclictest0-21swapper/123:46:241
2898499161,2cyclictest0-21swapper/122:02:181
28984991610,5cyclictest0-21swapper/123:06:011
2898499160,7cyclictest0-21swapper/122:11:031
2898499160,3cyclictest29195-21munin-node1
2898499160,3cyclictest0-21swapper/120:45:171
2898499160,3cyclictest0-21swapper/120:20:001
2898499160,14cyclictest0-21swapper/119:20:111
28986991510,3cyclictest0-21swapper/321:36:003
2898699150,13cyclictest0-21swapper/323:55:333
2898599151,3cyclictest0-21swapper/200:05:132
2898599151,2cyclictest0-21swapper/200:25:162
2898599150,13cyclictest619-21uname21:30:192
2898499156,2cyclictest0-21swapper/120:10:161
2898499154,3cyclictest31484-21df_abs20:35:131
2898499154,3cyclictest25546-21fschecks_count20:20:141
2898499153,3cyclictest9163-21aten2.4_r3power19:40:121
2898499153,3cyclictest3703-21sshd19:32:061
2898499153,3cyclictest2001-21tr22:40:121
2898499151,5cyclictest13974-21munin-node1
2898499151,3cyclictest0-21swapper/119:55:151
2898499150,5cyclictest0-21swapper/120:55:121
2898399150,13cyclictest26604-21open_files23:05:180
82572140,3sleep08267-21ssh21:38:420
2898699140,3cyclictest2549-21sed22:06:043
2898699140,12cyclictest3649-21snmpd23:16:333
2898699140,12cyclictest29527-21ssh23:43:013
2898699140,12cyclictest22127-21ssh23:00:343
2898699140,12cyclictest12764-21diskmemload22:18:233
2898699140,12cyclictest0-21swapper/319:50:003
28985991411,2cyclictest8772-21kworker/u8:222:59:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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