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2026-06-07 - 23:08

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 all highest latencies:
System rackfslot4s.osadl.org (updated Sun Jun 07, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
882321240,3chrt8824-21chrt11:46:560
791921230,3chrt7920-21ssh10:08:340
1282421170,2chrt12825-21/usr/sbin/munin07:45:400
912421160,2chrt9111-21ntpq09:21:340
2586121160,4chrt25860-21ld09:46:360
3043521150,2sleep030438-21chrt12:19:580
2290421150,3chrt22902-21python312:08:050
172921140,3chrt1728-21/usr/sbin/munin11:36:100
1677921140,2chrt16778-21seq11:59:280
1000821140,2chrt10009-21seq12:37:150
2334821130,3chrt23349-21chrt09:42:500
645321120,2sleep06454-21seq10:55:070
1297321110,2chrt12975-21sh10:16:230
591721100,2sleep05918-21sh09:16:510
2704321100,2sleep027040-21tune2fs11:25:510
1422321100,2chrt14222-21seq09:29:590
872421090,2chrt8725-21sleep10:10:110
608021090,1sleep06082-21irqrtprio08:25:430
186621070,2chrt1867-21sleep07:27:360
536521060,4chrt5366-21seq07:33:440
2424121050,2chrt24242-21aten2.4_rfpower12:10:330
2368821040,2chrt23687-21mailstats08:02:010
1142021040,3chrt11421-21sh07:43:150
3080221020,2chrt30803-21sh09:54:400
26182950,1sleep02615-21fschecks_count08:20:350
78752910,2sleep07876-21chrt12:34:480
27152900,2sleep02716-21chrt12:26:120
37562890,2sleep03757-21chrt10:02:130
224802870,2sleep022481-21seq11:19:020
243442850,3sleep024346-21tail08:55:250
168162830,1sleep016817-21chrt09:33:140
148562820,2sleep014857-21seq08:40:130
315382800,2sleep031539-21seq10:43:370
103902770,1sleep010391-21fschecks_time11:00:500
250902760,2sleep025091-21chrt08:05:070
10482700,1sleep01046-21nfs4_client10:46:150
213742690,2sleep021375-21seq10:28:080
57862670,2sleep05784-21ssh11:42:140
246062660,2sleep024607-21seq10:32:570
14642660,2sleep01465-21seq09:59:100
310372640,2sleep031032-21if_eth209:05:420
185382570,2sleep018537-21ld12:01:270
4472520,1sleep0415-21pluginstate11:35:030
157702520,1sleep015776-21chrt11:08:510
22796905127,16cyclictest15369-21apt-get10:21:000
22796905124,17cyclictest1032-21apt-get09:10:200
22796905119,22cyclictest412-21snmpd08:46:090
22796905119,22cyclictest0-21swapper11:23:260
22796905024,16cyclictest30685-21apt-get12:20:250
22796904925,16cyclictest11698-21apt-get08:35:280
22796904925,15cyclictest18667-21apt-get07:55:510
22796904921,19cyclictest281-21in:imuxsock10:39:370
22796904920,19cyclictest8508-21basename08:30:220
22796904918,23cyclictest0-21swapper11:53:080
22796904918,22cyclictest18268-21munin-run07:55:040
300322480,3chrt30029-21cat08:11:300
22796904824,16cyclictest17772-21apt-get09:35:250
22796904816,22cyclictest22929-21/usr/sbin/munin07:10:420
22796904816,14cyclictest21039-21apt-get08:50:200
22796904816,13cyclictest3479-21telnet10:50:350
22796904721,15cyclictest26034-21apt-get07:15:150
22796904720,15cyclictest16881-21runrttasks11:10:410
22796904614,22cyclictest6013-21apt-get07:35:180
2070724611,20sleep020746-21ntpq07:05:380
22796904522,15cyclictest29171-21apt-get07:20:180
22796904517,20cyclictest28589-21sshd09:01:190
22796904420,14cyclictest2014-21munin-run08:20:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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