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2026-04-06 - 02:17

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 100 highest latencies:
System rackfslot4s.osadl.org (updated Sun Apr 05, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1797721280,2sleep017978-21seq08:24:590
1343921280,2chrt13440-21runrttasks08:16:240
3141821190,2sleep031416-21proc_pri11:13:000
1642521190,3chrt16426-21chrt11:39:280
741121180,2chrt7414-21ntp_offset10:36:450
2588921180,2sleep025916-21switchtime08:36:270
2137821180,3chrt21382-21sed11:46:140
2321621170,2sleep023217-21/usr/sbin/munin11:00:550
2881121160,3chrt28809-21ntp_states08:41:150
2038021160,2sleep020382-21munin-plugin-st09:20:010
2766821140,2chrt27667-21/usr/sbin/munin11:07:120
439521130,3chrt4396-21sleep08:55:170
2919521130,3chrt29193-21if_eth010:21:010
1132521130,2chrt11326-21sh08:13:490
1331521090,3chrt13317-21sleep10:45:590
1281421090,2chrt12813-21seq11:33:450
788121070,3chrt7882-21sleep08:07:520
2645321070,1sleep026454-21runrttasks11:54:360
2087621070,2chrt20877-21sh10:57:070
3033221020,2chrt30334-21awk12:00:160
2916421010,1sleep029165-21runrttasks11:58:080
94682950,2sleep09469-21seq12:17:040
12512950,2sleep01252-21uname11:16:060
69922940,2sleep06993-21seq12:13:290
69032910,2sleep06904-21chrt11:25:110
200362880,2sleep020037-21chrt11:45:030
37512850,2sleep03752-21seq11:20:310
250092850,2sleep025010-21uname09:26:130
30592830,2sleep03060-21chrt10:30:440
87912800,3chrt8741-21ntp_states09:01:160
34142800,1sleep03415-21runrttasks12:07:520
113902800,2sleep011391-21seq09:55:010
216022780,2sleep021603-21seq08:30:260
359927710,54sleep03585-21munin-run07:10:020
154752770,2sleep015476-21chrt09:12:140
118282770,1sleep011829-21chrt12:20:560
160922740,2sleep016093-21runrttasks12:26:590
125602720,2sleep012563-21irqrtprio09:56:080
45392690,2sleep04543-21irqrtprio07:10:430
164712690,2sleep016472-21chrt07:30:180
53092680,2sleep05310-21seq09:45:430
280462650,2sleep028047-21if_eth009:31:030
205842630,2sleep020585-21seq09:20:120
105662610,2sleep010567-21cat07:20:410
204022570,1sleep020403-21seq12:33:430
229972560,1sleep022998-21chrt07:40:300
286502540,2sleep028651-21seq07:49:590
118962540,2sleep011897-21/usr/sbin/munin09:06:160
3634905232,12cyclictest16720-21/usr/sbin/munin10:51:020
3634905222,20cyclictest3172-21ntp_states09:42:090
3634905221,22cyclictest32293-21ssh09:37:110
3634905220,23cyclictest436-21runrttasks12:37:070
117762520,1sleep011777-21chrt10:43:310
3634905120,22cyclictest19235-21ntpq08:25:540
3634905033,10cyclictest3577-21chrt08:53:220
3634905028,15cyclictest15465-21fschecks_count10:00:540
3634905020,22cyclictest1079-21munin-run08:50:000
3634905020,21cyclictest8153-21ntpq07:16:150
3634905020,21cyclictest31960-21/usr/sbin/munin07:56:160
3634905020,20cyclictest25059-21sshd10:15:080
3634905019,23cyclictest7315-21runrttasks10:06:110
3634905018,22cyclictest21700-21apt-config10:10:120
3634905016,13cyclictest30161-21ntp_states07:51:180
3634904923,14cyclictest2631-21apt-get08:00:190
3634904919,21cyclictest31757-21/usr/sbin/munin10:26:050
3634904718,21cyclictest20473-21grep07:35:470
3634904623,15cyclictest13104-21apt-get07:25:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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