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2026-07-27 - 06:51

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 highest latencies:
System rackfslot4s.osadl.org (updated Mon Jul 27, 2026 00:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
875021340,2sleep08751-21seq21:51:540
3056321300,2sleep030561-21entropy00:01:250
2189221170,4chrt21893-21sleep21:23:030
635721150,3chrt6355-21/usr/sbin/munin19:15:390
348021150,1sleep03481-21seq00:09:150
2429821150,2sleep024299-21seq23:03:160
1896821130,3chrt18969-21sleep22:07:130
1065221130,2chrt10650-21sshd21:55:270
283421120,3chrt2833-21sshd19:10:270
900721100,1sleep09006-21seq00:17:110
670521100,2chrt6706-21sleep21:00:220
683321090,3chrt6834-21sleep20:08:300
1115821050,2chrt11159-21sh00:20:480
1946121040,3chrt19462-21runrttasks23:44:570
200721020,2chrt2008-21sh23:18:240
402421000,2sleep04026-21rm22:33:150
2400721000,2chrt24008-21sleep19:44:120
1599121000,2chrt15992-21sh21:14:580
1152321000,2chrt11524-21sh19:24:010
82962970,2sleep08297-21vmstat23:27:290
179372960,2sleep017938-21chrt22:54:210
210022930,1sleep021003-21irqrtprio20:30:450
199422930,2sleep019940-21kernelversion22:56:550
263022900,2sleep026304-21uname23:06:120
208102870,2sleep020811-21apt-key00:35:170
69032860,2sleep06905-21seq21:49:460
324592860,2sleep032460-21ld22:27:090
157842850,2sleep015785-21chrt23:39:310
68392790,1sleep06840-21swap22:37:200
33232770,2sleep03324-21df23:20:380
105102760,2sleep010513-21cut23:31:100
229162750,2sleep022917-21date23:50:040
75812740,2sleep07580-21apt-get20:10:140
2390907341,23cyclictest26671-21df21:30:400
2390907142,21cyclictest25249-21ssh23:52:580
2390907141,21cyclictest17087-21ssh21:16:110
34982700,2sleep03499-21chrt21:44:370
2390907038,12cyclictest31524-21ssh23:14:190
2390906938,22cyclictest21009-21df22:10:390
2390906937,22cyclictest20844-21sleep19:39:060
2390906937,22cyclictest14328-21df22:00:380
267652680,2sleep026766-21chrt22:18:540
2390906844,13cyclictest27460-21apt-get22:20:250
2390906843,16cyclictest29630-21apt-get21:35:230
2390906843,14cyclictest23781-21ps21:26:080
2390906836,23cyclictest15470-21ntpq00:26:470
2390906836,21cyclictest12067-21diskstats22:45:440
2390906742,15cyclictest17315-21apt-get00:30:260
2390906736,12cyclictest16325-21ntpq19:31:030
2390906735,23cyclictest7173-21ssh00:15:040
2390906735,23cyclictest25685-21ntpq19:46:070
2390906735,23cyclictest1884-21hddtemp_smartct20:00:390
2390906735,22cyclictest32652-21apt-get20:50:120
2390906644,15cyclictest27608-21sshd23:56:270
2390906642,16cyclictest8312-21apt-get22:40:200
2390906640,16cyclictest30684-21/usr/sbin/munin19:56:070
2390906635,13cyclictest13224-21runrttasks19:26:030
2390906633,17cyclictest10835-21awk20:15:100
2390906541,14cyclictest17118-21apt-get20:25:130
2390906540,16cyclictest29536-21apt-get20:45:120
2390906540,12cyclictest28772-21chrt19:51:050
2390906538,12cyclictest24085-21runrttasks20:35:450
2390906533,22cyclictest3295-21apt-get20:55:110
2390906440,15cyclictest9745-21apt-get21:05:170
2390906434,22cyclictest26444-21seq20:40:120
2390906239,12cyclictest14018-21apt-get20:20:190
2390906041,13cyclictest2413-21sed19:10:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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