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2026-03-10 - 23:29

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 Tue Mar 10, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
43021920,2chrt432-21cut07:05:190
929721260,2chrt8595-21apt-get08:11:040
2085021250,3chrt20851-21chrt10:56:500
614921200,2chrt6148-21/usr/sbin/munin09:46:180
2351421200,2chrt23516-21wc11:50:050
2800721170,4chrt28008-21runrttasks08:40:310
2279421170,3chrt22795-21fschecks_count07:40:340
2984621160,1sleep029910-21cpuspeed11:10:370
2928521160,2sleep029286-21seq11:09:550
634421150,2chrt6343-21/usr/sbin/munin08:05:440
2170621150,2chrt21707-21sleep10:10:140
1382421150,2sleep013826-21sed09:10:090
1718821140,1sleep017239-21aten2.4_rfpower11:40:320
1348121140,2chrt13477-21ps08:16:230
369821130,2chrt3695-21ntpq08:01:000
215521130,2chrt2156-21runrttasks10:29:220
369221120,3chrt3693-21/usr/sbin/munin09:42:290
1883921120,2chrt18830-21ntpq09:16:510
1681521110,2chrt16814-21seq07:30:430
2096921100,2chrt20970-21sleep10:08:470
2378621090,2chrt23787-21sleep08:33:290
898221080,2chrt8983-21sleep10:39:430
3236321080,1sleep032362-21seq12:02:270
2697721080,3chrt26978-21chrt09:29:320
3016221070,1sleep030164-21timerandwakeup07:51:280
40121060,2chrt402-21sh08:47:500
334721060,1sleep03348-21chrt11:19:370
592621050,2chrt5927-21sleep07:13:380
473921050,2sleep04740-21seq10:32:350
2179421050,2sleep021796-21cut12:35:520
2475821020,2sleep024759-21chrt11:02:300
1499721010,1sleep014999-21runrttasks10:48:060
89182980,3sleep08919-21ssh11:27:180
256812930,2sleep025682-21chrt07:45:260
124272920,2sleep012428-21seq10:44:540
154262810,2sleep015429-21cut09:12:020
146532810,2sleep014654-21seq09:59:420
88192790,1sleep08821-21cut12:16:070
77032790,2sleep07704-21chrt09:00:220
186962780,2sleep018699-21grep12:31:240
188982760,2sleep018899-21chrt10:54:260
296712720,2sleep029672-21chrt11:59:010
107382720,2sleep010739-21seq11:30:360
318902690,2sleep031894-21base6407:55:110
165892650,2sleep016587-21open_files08:21:240
96092620,2sleep09610-21apt-get07:20:040
194562620,1sleep019464-21seq08:26:030
200152610,1sleep020019-21sed07:35:450
143172560,1sleep014318-21chrt12:25:030
257302524,41sleep025726-21ntpq08:36:090
95742512,41sleep09572-21ntpq09:51:230
3378905117,24cyclictest0-21swapper11:52:340
274732516,36sleep027374-21apt-get09:30:260
20932510,3chrt2095-21irqrtprio08:50:440
324142508,35sleep032409-21ssh09:37:140
58622490,1sleep05863-21/usr/sbin/munin12:11:350
3378904920,22cyclictest0-21swapper11:38:190
3378904919,22cyclictest0-21swapper12:07:550
63432480,2sleep06347-21chrt08:57:040
163422470,2sleep016343-21runrttasks12:27:190
3378904616,22cyclictest0-21swapper11:23:000
3378904516,21cyclictest0-21swapper09:22:490
3378904417,9cyclictest412-21snmpd07:20:080
285382441,4sleep00-21swapper10:20:320
255552440,3chrt25559-21fschecks_count10:15:500
337890435,18cyclictest16475-21ntpq10:01:470
337890404,10cyclictest14149-21/usr/sbin/munin07:25:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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