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2026-08-07 - 03:40

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 Fri Aug 07, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2750821060,2chrt0-21swapper/323:53:593
94342750,3sleep20-21swapper/220:13:532
94342750,3sleep20-21swapper/220:13:532
314112730,4sleep0171ktimers/019:44:040
158652720,3sleep00-21swapper/021:56:260
158652720,3sleep00-21swapper/021:56:260
161032680,3chrt16106-21unixbench-2d20:29:031
19730996147,12cyclictest0-21swapper/100:03:551
19730996147,12cyclictest0-21swapper/100:03:551
257662540,3sleep20-21swapper/223:49:002
257662540,3sleep20-21swapper/223:49:002
19730994939,4cyclictest0-21swapper/100:03:481
19730994939,4cyclictest0-21swapper/100:03:481
19730994939,4cyclictest0-21swapper/100:03:481
48712460,3sleep20-21swapper/219:59:052
48712460,3sleep20-21swapper/219:59:052
141162440,3chrt0-21swapper/320:24:033
306472420,2chrt0-21swapper/300:03:523
306472420,2chrt0-21swapper/300:03:523
1972199422,32cyclictest601-21snmpd00:04:250
1972199422,32cyclictest601-21snmpd00:04:250
77482400,3sleep07839-21cat21:34:040
19721993825,11cyclictest595-21sshd19:54:220
275342370,3chrt201rcuc/022:28:540
275342370,3chrt201rcuc/022:28:540
150782360,2sleep20-21swapper/220:28:532
19721993529,4cyclictest545-21in:imuxsock22:38:420
19721993529,4cyclictest545-21in:imuxsock22:38:420
19721993526,7cyclictest545-21in:imuxsock20:33:240
19721993429,4cyclictest1648-21ntpd21:59:060
19721993429,4cyclictest1648-21ntpd21:59:060
19721993429,4cyclictest1648-21ntpd21:59:060
118512340,2sleep20-21swapper/221:44:062
19743993326,4cyclictest76822sleep320:08:553
19743993326,4cyclictest76822sleep320:08:553
1973699331,22cyclictest30556-21chrt00:03:472
1973699331,22cyclictest30556-21chrt00:03:472
1973699331,22cyclictest30556-21chrt00:03:472
19730993326,5cyclictest9819-21kernelversion20:13:561
19730993326,5cyclictest9819-21kernelversion20:13:561
19721993328,4cyclictest19719-21cyclictest22:53:590
19721993328,4cyclictest19719-21cyclictest22:53:590
19721993325,6cyclictest20722-21netstat22:08:580
19721993325,6cyclictest20722-21netstat22:08:580
19721993224,6cyclictest19707-21threads20:39:060
19721993224,6cyclictest19707-21threads20:39:060
19721993224,6cyclictest19707-21threads20:39:060
19721993125,5cyclictest19719-21cyclictest00:03:430
19721993125,5cyclictest19719-21cyclictest00:03:430
19721993125,5cyclictest19719-21cyclictest00:03:430
19730993020,8cyclictest30171-21processes22:34:021
19730993020,8cyclictest30171-21processes22:34:021
19730993019,8cyclictest17488-21latency_hist23:28:471
19721993024,5cyclictest6064-21kernelversion20:03:580
19721993023,5cyclictest20029-21missed_timers23:33:570
19721993023,5cyclictest20029-21missed_timers23:33:570
19721993023,5cyclictest18557-21latency_hist20:38:440
19721993020,7cyclictest8282-21processes20:09:030
19721993020,7cyclictest8282-21processes20:09:030
231052290,3sleep20-21swapper/223:43:502
1974399291,20cyclictest30571-21taskset00:03:483
19730992924,3cyclictest22623-21ntp_offset22:14:001
19730992924,3cyclictest0-21swapper/120:53:421
19730992923,3cyclictest0-21swapper/122:48:411
19730992922,5cyclictest21801-21kernelversion23:38:561
19730992921,6cyclictest2135-21fschecks_count00:13:531
19730992921,6cyclictest2135-21fschecks_count00:13:531
19721992923,4cyclictest10747-21needreboot23:09:000
19721992923,4cyclictest10747-21needreboot23:09:000
24772280,1sleep12479-21grep21:19:041
24772280,1sleep12479-21grep21:19:041
24772280,1sleep12479-21grep21:19:041
19730992824,3cyclictest26818-21cpuspeed19:33:531
19730992824,3cyclictest26818-21cpuspeed19:33:531
19730992822,2cyclictest0-21swapper/120:08:421
19730992821,5cyclictest550-21cron22:33:421
19730992821,5cyclictest550-21cron22:33:421
19730992821,5cyclictest32527-21/usr/sbin/munin00:08:541
19730992821,4cyclictest0-21swapper/122:39:051
19730992821,4cyclictest0-21swapper/122:39:051
19721992824,3cyclictest19719-21cyclictest00:14:010
19721992824,3cyclictest19719-21cyclictest00:14:010
19721992823,3cyclictest0-21swapper/022:49:040
19721992822,4cyclictest15461-21cron23:23:410
19721992822,4cyclictest15461-21cron23:23:410
19721992821,6cyclictest27404-21kernelversion23:53:580
19721992821,5cyclictest3304-21cut21:23:580
138502280,8sleep0171ktimers/020:24:000
23962270,3chrt0-21swapper/022:48:440
19730992722,3cyclictest0-21swapper/100:43:421
19730992722,3cyclictest0-21swapper/100:43:421
19730992722,2cyclictest0-21swapper/123:33:421
19730992719,6cyclictest27616-21netstat23:54:011
19721992723,3cyclictest24090-21gltestperf22:18:550
19721992723,3cyclictest24090-21gltestperf22:18:550
19721992723,3cyclictest19719-21cyclictest21:04:050
19721992723,2cyclictest0-21swapper/021:43:420
19721992723,2cyclictest0-21swapper/021:43:420
19721992721,4cyclictest9689-21fschecks_count00:33:560
19721992719,6cyclictest12833-21cron20:23:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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