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2026-09-07 - 08:45

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 Mon Sep 07, 2026 00:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1992621280,3chrt19929-21sed21:06:000
1466721280,2sleep014669-21fschecks_time20:05:370
2468921190,2chrt24043-21apt-get19:30:550
1021021180,4chrt10189-21ntpq23:17:080
1115621170,2chrt11157-21mailstats20:51:250
2059921160,1sleep020600-21cat21:56:000
411421150,2chrt4115-21seq23:08:000
1011621150,3chrt10117-21/usr/sbin/munin00:06:010
2321421140,2sleep023220-21chrt22:47:510
1800321140,3chrt18004-21runrttasks23:29:010
671621130,3chrt6717-21runrttasks22:23:300
2554521130,2chrt25546-21runrttasks00:28:530
1135921130,3chrt11096-21apt-get20:01:000
1263221120,2chrt12633-21chrt22:32:010
2405321110,2sleep024054-21irqrtprio22:01:030
1687021070,1sleep016871-21seq22:38:370
3009421050,2chrt30095-21runrttasks22:58:260
234121050,2chrt2342-21sleep23:54:270
2039521040,2chrt20396-21sleep19:23:320
1417921030,2chrt14177-21/usr/sbin/munin20:56:300
265732980,2sleep026574-21chrt22:05:180
43472970,3sleep04351-21irqrtprio20:40:490
310082920,2sleep031009-21cut22:11:150
171702920,1sleep017171-21cat00:16:100
130582920,2sleep013060-21kernelversion23:21:110
83022900,2sleep08303-21apt-get23:15:010
81282900,2sleep08130-21cut22:25:520
158702870,2sleep015869-21seq21:00:060
221562850,1sleep022158-21seq21:10:140
306702830,2sleep030672-21find21:22:190
325772810,2sleep032579-21cpu21:25:380
214412790,3chrt21431-21users00:22:260
108292780,2sleep010830-21rm20:00:070
151572760,2sleep015158-21seq00:13:190
276152740,2sleep027617-21sed20:25:490
262592740,1sleep026255-21threads22:52:230
128352740,2sleep012836-21ssh21:44:320
277662730,1sleep027767-21chrt23:43:300
196572650,2sleep019686-21ssh21:55:000
65152630,2sleep06516-21date21:35:040
203242620,2sleep020325-21chrt22:43:520
215772610,2sleep021578-21tune2fs19:25:360
148222600,2sleep014824-21chrt19:15:040
292302553,9sleep029234-21hddtemp_smartct23:45:550
297972530,2sleep029799-21chrt00:35:360
264122520,2sleep026411-21seq20:24:590
223802490,2chrt22378-21/usr/sbin/munin23:35:440
15862490,2chrt1583-21/usr/sbin/munin22:16:200
94402480,1sleep09441-21chrt21:39:240
275862473,6sleep027584-21ssh00:31:350
957124613,18sleep09572-21ntpq19:05:530
194022460,3chrt19401-21/usr/sbin/munin23:31:020
11440904515,23cyclictest0-21swapper00:04:290
132442440,3sleep013239-21ssh21:45:130
1144090446,18cyclictest6064-21ntpq19:51:510
11440904414,22cyclictest0-21swapper23:02:320
1144090426,26cyclictest705-21df_inode20:35:300
1144090425,19cyclictest28671-21munin-run21:20:040
1144090425,11cyclictest16193-21ntpq19:16:190
1144090424,10cyclictest31960-21ntpq19:41:180
1144090417,13cyclictest31354-21users20:31:310
1144090416,10cyclictest4307-21ntp_states23:56:550
1144090415,19cyclictest2597-21ntp_states19:46:160
11440904114,9cyclictest28042-21perl19:35:370
11440904018,15cyclictest0-21swapper20:15:230
1144090394,9cyclictest7811-21ntpq20:46:090
11440903918,14cyclictest0-21swapper20:10:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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