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2026-06-28 - 06:50

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 Jun 28, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134072155821,1521sleep213408-21ntp_states20:20:292
155072111517,1082sleep315513-21diskstats22:10:013
1501254744,471sleep0364-21snmpd23:08:200
1501254744,471sleep0364-21snmpd23:08:200
10847254130,489sleep010937-21fschecks_time21:55:040
10847254130,489sleep010937-21fschecks_time21:55:040
805425279,502sleep28092-21ntpq21:45:092
22158249624,456sleep222231-21/usr/sbin/munin22:30:112
22158249624,456sleep222231-21/usr/sbin/munin22:30:112
19758240415,371sleep019819-21sendmail_mailqu00:05:140
21944235025,306sleep322071-21/usr/sbin/munin19:05:153
10305233326,295sleep010340-21ntpq23:35:100
26433231624,205sleep026580-21grep00:25:170
1421323167,255sleep00-21swapper/023:48:470
24437229613,199sleep0225-21systemd-journal22:39:180
18442229320,118sleep018590-21unixbench_singl00:00:180
14287229014,258sleep114336-21unin-run23:49:451
165142274102,82sleep00-21swapper/023:55:090
5226226544,197sleep05383-21tail21:35:220
9885225950,191sleep010015-21grep21:50:160
9885225950,191sleep010015-21grep21:50:160
20473225410,207sleep020485-21needreboot22:25:090
7744225070,95sleep00-21swapper/021:45:030
11743223250,107sleep011790-21ntpq20:15:140
7412222763,89sleep07553-21unixbench_singl20:00:200
195192211115,76sleep00-21swapper/020:40:140
28365220431,138sleep028420-21tune2fs19:25:110
30623220112,75sleep00-21swapper/021:16:000
3014218811,100sleep03047-21latency21:30:050
2967521858,17sleep00-21swapper/022:55:000
18058217815,107sleep018121-21mailstats20:35:170
18058217815,107sleep018121-21mailstats20:35:170
12023217517,140sleep212184-21awk20:15:202
6634217235,43sleep10-21swapper/119:59:561
3006021727,153sleep030100-21latency19:30:110
9660216589,17sleep00-21swapper/023:34:450
1856321599,95sleep018564-21cpu22:20:000
611321588,35sleep00-21swapper/021:39:580
2291821545,97sleep00-21swapper/022:34:370
2291821545,97sleep00-21swapper/022:34:370
16125215419,122sleep316140-21grep23:54:593
2106215318,120sleep11622-21apt-get23:09:551
17516215044,13sleep00-21swapper/020:34:570
17516215044,13sleep00-21swapper/020:34:570
2679121457,14sleep00-21swapper/022:45:110
2539421445,28sleep00-21swapper/000:23:520
2416214317,110sleep32510-21memory23:10:133
2778221428,83sleep027846-21mailstats00:30:140
2325321415,28sleep00-21swapper/020:51:280
28557214017,62sleep228605-21unin-run00:34:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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