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2026-05-24 - 11:42

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 May 24, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
671021250,3chrt6712-21mii-tool00:36:430
429421240,3chrt4295-21chrt23:44:460
1230421230,3chrt12306-21fschecks_time21:30:540
155821200,4chrt1557-21ssh22:02:500
2802321190,2chrt28021-21ps19:21:230
1855621190,2chrt18286-21apt-get20:50:590
2778121170,2sleep027778-21aten2.4-expect21:05:250
2580521170,2chrt25807-21cut20:10:330
2328521170,3chrt23287-21rm00:12:220
2194121170,2sleep021942-21sh22:33:290
1348321160,3chrt13484-21runrttasks23:09:480
920621150,3chrt9207-21runrttasks23:02:290
3072121150,2chrt30719-21/usr/sbin/munin23:35:350
1290621150,2chrt12765-21apt-get22:20:350
3135121140,2chrt31344-21users19:26:310
2564621140,2chrt25643-21ld21:01:010
523821120,2sleep05239-21chrt20:29:590
154721110,2chrt1546-21seq19:31:060
2725121100,2chrt27252-21ssh21:52:420
935121090,2chrt9350-21cut21:26:080
904421080,2chrt9045-21load23:51:120
557121060,2chrt5573-21sh22:09:230
2739021060,2chrt27391-21runrttasks00:19:020
485021040,2chrt4849-21/usr/sbin/munin23:45:360
3193821040,2chrt31939-21sh22:48:070
2559821040,2chrt25599-21mailstats23:27:140
272692990,2sleep027272-21cut22:41:060
325672960,2sleep032568-21chrt00:26:150
241132940,2sleep024114-21chrt22:36:500
210972940,2sleep021098-21ssh21:43:570
86172900,2sleep08621-21wc20:35:020
64782900,2sleep06476-21ntp_offset21:21:470
176692900,1sleep017671-21cut23:15:530
284812880,2chrt28482-21sh21:55:190
232642850,2sleep023265-21cat20:05:470
3772820,2sleep0378-21seq21:12:380
138712810,2sleep013872-21seq23:58:530
48052790,1sleep04808-21cut22:56:060
184372789,18sleep018450-21ntpq19:06:150
23822770,2sleep02384-21aten2.4_rfpower00:30:320
241452760,2sleep024146-21chrt21:48:160
36392740,2sleep03640-21basename19:35:250
223172740,2sleep022318-21seq23:22:190
113192640,2sleep011322-21wc22:17:260
7962593,8sleep0856-21runrttasks22:50:360
285322593,8sleep028536-21ssh23:31:440
119002570,2sleep011901-21seq20:40:180
285572560,2sleep028558-21chrt20:15:160
210202560,2sleep021019-21seq00:09:400
167592553,44sleep016773-21open_inodes21:37:180
156232554,7sleep015638-21/usr/sbin/munin00:01:110
130152550,2sleep013016-21seq19:50:140
69442543,42sleep06940-21diskstats19:40:350
102862540,1sleep010287-21timerandwakeup20:36:260
146482520,2sleep014652-21cut23:11:040
84162500,2chrt8405-21ssh22:13:130
20231905019,24cyclictest0-21swapper22:28:450
108352503,38sleep010830-21ntpq19:46:050
3162483,36sleep0326-21ntpq20:21:020
20231904818,22cyclictest0-21swapper21:18:180
20231904817,22cyclictest0-21swapper00:23:140
214442463,34sleep021454-21ntpq19:10:570
214142464,32sleep021373-21apt-get20:55:180
234732440,3sleep023472-21seq19:15:130
163422440,2chrt16343-21proc_pri20:46:240
20231903913,9cyclictest0-21swapper20:01:450
2023190387,12cyclictest19027-21munin-run20:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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