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2026-06-04 - 20:50

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 Thu Jun 04, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
575121240,2sleep05752-21fschecks_count08:45:330
2859821230,3chrt28597-21/usr/sbin/munin08:30:260
3115621190,2chrt31149-21ntpq11:01:380
2673421190,3chrt26735-21chrt11:43:570
1823021190,4chrt18225-21ntpq07:21:050
2975221180,2chrt29751-21/usr/sbin/munin07:40:240
258121150,2chrt2580-21/usr/sbin/munin11:56:090
1761521150,2sleep017619-21seq12:19:150
901021140,2chrt9012-21runrttasks10:28:560
2993521130,2chrt29938-21sed10:11:160
2330221130,2sleep023303-21seq10:50:360
660321110,2chrt6602-21ssh09:36:230
463921110,2sleep04638-21seq08:43:310
1937121110,2chrt19369-21timerwakeupswit11:32:200
2441821100,2chrt24419-21seq12:29:380
468321080,1sleep04684-21chrt07:51:120
1367421080,2chrt13675-21sleep07:14:560
1180521080,2chrt11806-21ssh09:44:560
2440521070,3chrt24406-21sleep09:15:130
2132821070,2chrt21330-21fschecks_time11:35:510
1828921070,2chrt18290-21sh08:13:420
2440321030,2chrt24404-21sleep10:03:060
211522990,2sleep021155-21apt-key09:10:200
144402990,3chrt14441-21sleep08:06:360
135962990,2chrt13597-21sleep08:57:320
176102960,1sleep017611-21seq10:41:210
286432940,1sleep028644-21gcc11:46:240
22432920,1sleep02241-21aten2.4_rfpower09:30:350
108312870,2sleep010832-21chrt11:20:180
76112860,1sleep07612-21aten2.4_rfpower11:15:320
122412860,1sleep012242-21aten2.4-expect09:45:330
9412810,2sleep0942-21if_err_eth207:45:410
87982810,1sleep08792-21ssh12:05:530
227842780,2sleep022789-21tr08:20:440
113642770,2sleep011365-21chrt10:32:110
207992750,1sleep020797-21vmstat09:57:330
84782720,2sleep08480-21chrt08:50:130
44542690,1sleep04452-21aten2.4_rfpower11:10:500
212062670,1sleep021207-21rm10:46:480
9692660,2sleep0972-21grep11:05:380
295472640,2sleep029544-21ps09:22:170
80272594,10sleep08013-21munin-run12:05:020
272462560,1sleep027244-21sshd12:33:280
866425513,26sleep08665-21ntpq07:05:430
8482552,7sleep0842-21ssh10:16:190
38732530,2sleep03980-21cut10:21:060
323322533,41sleep032335-21ntpq09:26:200
144982533,8sleep014495-21ntpq10:36:480
277382510,1sleep027739-21chrt10:08:060
188422515,38sleep018852-21ntpq09:05:550
307112504,8sleep030681-21apt-get11:50:150
166362494,37sleep016630-21ssh11:28:380
151452494,35sleep015147-21ntp_states07:16:110
296212473,36sleep029618-21ntp_states12:36:530
10667904718,22cyclictest0-21swapper09:53:020
101412470,3chrt10140-21seq08:00:370
266012440,2chrt26603-21aten2.4_rfpower10:55:340
10667904416,21cyclictest0-21swapper12:14:040
10667904312,23cyclictest0-21swapper07:36:240
10667904214,11cyclictest19640-21irqrtprio08:15:440
1066790415,18cyclictest21850-21ntpq07:26:590
10667904119,15cyclictest0-21swapper12:24:180
85712400,2chrt8572-21sh07:57:370
1066790405,16cyclictest25183-21sleep08:25:120
1066790394,28cyclictest16336-21users09:01:300
10667903916,17cyclictest25298-21runrttasks07:32:030
10667903813,19cyclictest32647-21ntpq08:36:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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