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2026-05-26 - 06:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #4

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackfslot4s.osadl.org (updated Tue May 26, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
867121240,3chrt8669-21modprobe00:20:000
3191321240,3chrt31919-21modprobe21:40:000
447721220,4chrt4478-21sleep21:46:450
1192221210,2chrt11923-21sleep22:46:460
1748821190,3chrt17489-21chrt22:55:380
1900821180,2sleep019009-21irqrtprio23:46:060
711821160,2chrt7116-21ssh23:28:110
62421150,2chrt621-21sshd00:07:160
114821140,2chrt461-21/usr/sbin/munin22:31:010
157921130,3sleep01577-21gpgv23:20:230
1111121130,3chrt11109-21ld20:16:220
2609621120,2chrt26097-21seq19:48:440
2244721100,2chrt22448-21sleep21:25:440
2042721100,2chrt20429-21sort19:40:030
922021070,2chrt9221-21runrttasks21:54:280
525821060,3chrt5259-21sleep20:59:420
1713921060,2sleep017186-21sed22:06:050
3250121040,2chrt32502-21sh23:17:360
161892990,2sleep016190-21date22:05:030
100282950,2sleep010029-21seq23:32:210
144572900,2sleep014458-21chrt00:27:510
216622880,2sleep021663-21stty23:50:350
29312870,2sleep02932-21date21:45:040
220752860,2sleep022076-21chrt23:02:060
87012840,2sleep08702-21gcc22:41:560
42642840,2chrt43-21kswapd022:35:490
289582830,2sleep028959-21cat23:12:200
133282810,2chrt13319-21diskstats20:20:320
1736908013,21cyclictest10781-21runrttasks19:24:200
184832760,2sleep018484-21basename21:20:000
1736907614,17cyclictest28470-21df_inode00:00:400
173690754,26cyclictest22260-21/usr/sbin/munin20:35:500
1736907517,10cyclictest15426-21ntpq19:31:000
173690746,18cyclictest17208-21ntpq00:32:080
173690746,11cyclictest15223-21ntpq22:51:450
173690745,21cyclictest25647-21ssh21:30:300
173690745,11cyclictest24584-21seq23:06:040
173690744,20cyclictest31595-21/usr/sbin/munin20:50:250
173690744,12cyclictest19156-21/usr/sbin/munin20:30:440
173690735,25cyclictest31026-21ntpq22:26:420
173690735,20cyclictest5512-21hddtemp_smartct19:15:400
173690735,10cyclictest28322-21munin-run20:45:020
173690734,20cyclictest19132-21diskstats21:20:460
209282720,1sleep020929-21collect222:11:280
173690724,10cyclictest13244-21python323:37:150
5792710,1sleep0580-21seq20:00:220
299812710,2sleep029982-21basename20:46:250
173690716,19cyclictest28991-21ssh22:24:010
173690716,18cyclictest26116-21sendmail-msp22:20:020
173690716,18cyclictest25936-21ntpq23:56:220
173690716,10cyclictest11237-21ntpq21:57:030
173690715,18cyclictest20727-21sshd00:37:180
173690714,10cyclictest412-21snmpd00:20:180
173690706,17cyclictest8688-21/usr/sbin/munin21:06:240
173690706,10cyclictest27801-21ntpq19:50:550
173690705,19cyclictest4253-21users00:12:260
173690705,11cyclictest2895-21ntpq19:10:520
173690704,19cyclictest14800-21ssh21:14:390
173690704,18cyclictest7965-21ntp_states20:11:160
1736907016,11cyclictest17913-21ssh23:45:020
173690695,19cyclictest4925-21ntp_states20:06:170
173690685,18cyclictest7878-21sshd21:03:160
173690675,10cyclictest31175-21ntpq19:56:210
173690674,20cyclictest17497-21ntpq20:26:390
173690668,17cyclictest22823-21runrttasks19:43:150
173690655,10cyclictest11791-21perl19:25:530
3254324511,19sleep032548-21python319:06:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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