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2026-09-18 - 07:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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.

Note that this system runs a non-RT kernel.
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 50 highest latencies:
System rackbslot7s.osadl.org (updated Fri Sep 18, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16582196818,1933sleep11660-21ntp_states23:48:171
16799268114,648sleep216801-21sshd00:35:412
2448026287,609sleep024520-21ntpq19:53:100
2065425298,505sleep020861-21apt-config19:42:480
9303246021,424sleep29310-21/usr/sbin/munin19:08:022
3225624600,8sleep00-21swapper/020:17:480
842233929,294sleep0928-21fschecks_time22:03:050
30403227516,243sleep230411-21/usr/sbin/munin21:53:102
24308227053,130sleep024318-21find23:17:560
2120922538,234sleep021270-21if_eth019:43:090
16613225274,86sleep016709-21fschecks_time22:53:060
5328224729,50sleep35347-21sh22:17:463
31049224312,215sleep331056-21ntp_states20:13:243
31301221622,176sleep131311-21modprobe21:57:451
1740220620,148sleep00-21swapper/023:48:200
2166122037,186sleep0367-21snmpd21:23:330
2166122037,186sleep0367-21snmpd21:23:330
1940521999,56sleep00-21swapper/023:02:470
1212219513,119sleep01223-21modprobe20:22:450
10903219430,60sleep011061-21latency_hist20:52:480
8975219217,101sleep09119-21latency_hist19:07:480
16023217327,128sleep316037-21acpi21:07:573
973216910,96sleep01044-21latency_hist23:47:470
973216910,96sleep01044-21latency_hist23:47:470
2909521648,16sleep20-21swapper/223:33:042
19919216151,96sleep020008-21cat23:03:070
515121596,141sleep00-21swapper/022:15:290
16098215827,55sleep00-21swapper/019:27:590
16098215827,55sleep00-21swapper/019:27:590
10787215646,19sleep010852-21awk22:33:160
15026215417,111sleep015172-21grep19:23:190
13888215111,121sleep013906-21apt-get00:27:560
31808215021,35sleep20-21swapper/223:42:452
934421458,55sleep09495-21latency_hist20:47:480
3017214512,115sleep03081-21latency23:53:080
29803214535,93sleep00-21swapper/021:52:480
22650214510,116sleep022695-21ntp_kernel_pll_21:28:090
12671214514,46sleep00-21swapper/020:57:570
850621448,68sleep08477-21latency_hist22:27:470
1882721445,15sleep00-21swapper/021:17:150
1882721445,15sleep00-21swapper/021:17:150
12855213959,30sleep012898-21fschecks_count19:18:060
28869213832,87sleep00-21swapper/020:08:040
696721326,108sleep00-21swapper/020:38:150
4887213014,94sleep34954-21/usr/sbin/munin23:58:203
14619212716,88sleep00-21swapper/021:03:100
6068212422,81sleep10-21swapper/122:18:121
407321240,11sleep24046-21munin-run23:57:452
21139211614,81sleep321204-21fschecks_time19:43:083
12766211531,66sleep00-21swapper/000:23:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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