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2025-12-20 - 17:33

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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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 792 highest latencies:
System rackfslot4s.osadl.org (updated Sat Dec 20, 2025 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1228821240,2chrt12292-21sed12:36:080
2229421220,2chrt22295-21runrttasks11:14:090
1247921220,2chrt12468-21ntpq09:21:460
109921190,4chrt1100-21/usr/sbin/munin11:31:020
1109221180,2chrt11093-21chrt12:35:000
1058321180,2chrt10584-21seq11:45:350
1004621170,3chrt10047-21sleep10:55:470
2868621160,2chrt28687-21seq11:23:290
2473421160,2chrt24733-21seq11:17:170
819021150,2sleep08189-21grep09:15:530
1521221140,3chrt15211-21/usr/sbin/munin09:26:090
73821120,2sleep0741-21latency10:41:130
3075821120,2sleep030759-21runrttasks09:49:340
3070621120,2chrt30707-21sleep09:01:070
1636921100,2chrt16368-21ssh11:54:040
1587721100,2chrt15878-21seq11:04:380
326121090,2chrt3263-21latency09:56:110
371021080,2sleep03711-21seq12:23:180
2960621070,2chrt29607-21sleep08:06:060
2825621070,3chrt28257-21sleep07:12:300
2233321070,2chrt22334-21ssh12:02:180
1155321050,2chrt11552-21ssh10:09:050
649721040,1sleep06498-21runrttasks11:39:170
2942621040,1sleep029427-21idleruntime10:36:000
2824021040,2chrt28238-21/usr/sbin/munin12:11:130
598921030,2chrt5990-21runrttasks10:49:510
57252980,1sleep05723-21fschecks_count08:20:350
157002980,2sleep015701-21aten2.4_rfpower10:15:360
120682980,2chrt12069-21idleruntime08:30:430
262382970,2sleep026239-21uname08:00:480
255462950,2sleep025549-21cut12:07:130
294952940,2sleep029496-21seq11:25:100
147112940,2sleep014712-21chrt10:13:430
281902910,2sleep028191-21seq10:34:100
229522900,1sleep022954-21/usr/sbin/munin09:37:130
206652860,2sleep020667-21chrt10:22:180
110632830,2sleep011064-21chrt07:36:270
223622820,2sleep022363-21seq10:25:360
53762790,2sleep05377-21cat12:26:040
325982790,2sleep032600-21cut09:51:540
220912780,2sleep022092-21seq07:55:030
246142770,2sleep024615-21interrupts08:50:450
70672740,1sleep07068-21if_eth110:51:040
2610790744,59cyclictest5228-21hddtemp_smartct09:11:370
26107907416,50cyclictest12753-21aten2.4_rfpower07:40:230
2610790736,8cyclictest8414-21apt-get08:25:180
2610790734,9cyclictest30975-21ssh12:15:570
26107907319,46cyclictest22339-21/usr/sbin/munin08:46:270
26107907316,49cyclictest25156-21/usr/sbin/munin09:40:560
2610790725,58cyclictest32275-21sh07:20:040
2610790725,12cyclictest16787-21apt-get11:55:520
2610790724,48cyclictest2124-21ntpq09:05:590
26107907216,46cyclictest7148-21ntpq10:02:050
26107907215,47cyclictest3147-21/usr/sbin/munin07:26:280
2610790717,55cyclictest3590-21ps08:16:230
2610790716,10cyclictest8169-21memory11:41:130
2610790714,11cyclictest18747-21ntpq08:40:500
2610790706,54cyclictest29343-21apt-get07:15:160
2610790705,55cyclictest17506-21apt-get09:31:080
2610790705,10cyclictest29960-21munin-run09:00:000
2610790696,53cyclictest16235-21apt-get11:05:320
2610790695,10cyclictest22194-21apt-get07:55:130
2610790685,9cyclictest17061-21ntpq07:46:160
2610790685,52cyclictest14619-21apt-get08:35:220
2610790685,10cyclictest6469-21apt-get07:30:270
2610790683,9cyclictest32693-21ntpq08:11:050
2610790634,11cyclictest26122-21latency_hist07:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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