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2025-11-23 - 08:32

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 Sun Nov 23, 2025 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
266742178412,20sleep00-21swapper/020:58:580
266742178412,20sleep00-21swapper/020:58:580
13196265181,517sleep013218-21idleruntime-cro23:43:350
5199250111,470sleep25192-21apt-get21:33:532
13402245825,414sleep213455-21/usr/sbin/munin21:58:562
13402245825,414sleep213455-21/usr/sbin/munin21:58:562
20708241518,377sleep220852-21/usr/sbin/munin20:39:092
27639241014,384sleep124342-21kworker/1:021:02:181
27639241014,384sleep124342-21kworker/1:021:02:181
1665234217,306sleep21688-21/usr/sbin/munin19:39:002
18631229710,229sleep018691-21cat20:33:580
9567227610,246sleep09632-21sendmail_mailst20:04:060
14742223661,128sleep014752-21find22:03:470
14742223661,128sleep014752-21find22:03:470
3329223521,199sleep23349-21idleruntime-cro21:28:362
17251222739,177sleep0362-21snmpd22:09:280
24086222316,90sleep00-21swapper/019:08:420
24086222316,90sleep00-21swapper/019:08:420
22649222042,164sleep022739-21cut22:28:580
24430220847,111sleep00-21swapper/020:53:370
24430220847,111sleep00-21swapper/020:53:370
284122075,32sleep00-21swapper/023:08:590
23748220770,116sleep023809-21latency_hist19:08:380
25426220258,28sleep00-21swapper/020:54:300
2963421959,142sleep029680-21latency_hist21:08:390
2963421959,142sleep029680-21latency_hist21:08:390
1228921930,6sleep00-21swapper/020:13:540
1228921930,6sleep00-21swapper/020:13:540
11073219316,159sleep111210-21unixbench_multi23:34:111
11073219316,159sleep111210-21unixbench_multi23:34:111
23129219119,112sleep00-21swapper/000:13:510
1603721868,164sleep016039-21sshd23:50:170
1603721868,164sleep016039-21sshd23:50:170
2231621817,161sleep022361-21date22:28:380
29258217810,107sleep00-21swapper/022:49:090
2019321787,114sleep00-21swapper/000:03:580
16055217731,47sleep016204-21unixbench_singl20:24:090
31996217010,93sleep00-21swapper/022:58:530
18208216928,127sleep018303-21latency_hist20:33:380
4570216813,100sleep00-21swapper/019:49:000
27324216840,75sleep00-21swapper/019:18:390
24773216619,47sleep024863-21fschecks_time00:18:560
22186216510,112sleep022319-21ls00:09:070
7545216224,123sleep07625-21latency23:24:130
7545216224,123sleep07625-21latency23:24:130
16924214511,24sleep00-21swapper/023:54:130
22816214422,14sleep00-21swapper/020:48:360
10307214419,74sleep00-21swapper/021:49:050
4160214332,90sleep00-21swapper/019:48:390
15163214310,120sleep215199-21ntpq22:04:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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