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2026-07-27 - 16:45

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 Jul 27, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
184621200,2sleep01847-21fschecks_count09:20:530
2793521180,2chrt27936-21/usr/sbin/munin11:36:170
3193621170,2chrt31935-21seq10:53:520
52021160,2chrt521-21runrttasks11:44:330
2228121160,3chrt22280-21seq08:10:260
2159921160,2sleep021640-21stty09:50:340
1442421160,3chrt14358-21apt-get12:05:220
791721140,2chrt7918-21sh11:55:370
2349321140,3chrt23495-21fschecks_time10:41:260
1345121140,2sleep013452-21chrt10:26:110
102121140,2sleep01024-21cut10:56:050
173321130,2chrt1734-21runrttasks10:09:150
874421110,2chrt8742-21/usr/sbin/munin11:07:220
2916321110,2sleep029164-21latency10:01:130
2415221110,2chrt24154-21if_err_eth011:31:020
1566821110,2sleep015669-21seq10:30:080
3190121100,2sleep031902-21irqrtprio12:31:050
1630321100,2sleep016304-21ld09:42:040
322821080,2chrt3229-21runrttasks11:48:040
2045821030,2chrt20459-21runrttasks09:48:240
2709421020,2chrt27095-21sh09:58:190
1944421020,2chrt19443-21/usr/sbin/munin08:05:410
2248121000,1sleep022482-21seq11:28:150
147202960,2sleep014721-21gcc11:16:260
327052950,2sleep032706-21ntpq08:26:060
206112950,2sleep020615-21sendmail09:00:010
62922930,1sleep06294-21vmstat11:52:290
49222890,1sleep04925-21idleruntime-cro12:40:010
65102830,2sleep06511-21seq11:04:460
174102830,2sleep017412-21grep11:20:530
177302800,2sleep017731-21chrt12:10:210
125542790,2sleep012555-21seq11:13:230
84612760,2sleep08462-21seq08:40:240
272282710,1sleep027229-21basename09:10:350
306412700,2sleep030642-21sh12:29:460
150242660,1sleep015020-21fschecks_time08:50:350
221442630,1sleep022145-21seq10:39:400
175542620,1sleep017556-21fschecks_count07:10:340
126492625,46sleep012646-21ntpq09:36:320
66612600,2sleep06662-21chrt07:45:280
28962590,2sleep02929-21grep10:10:580
103562594,45sleep010365-21sleep10:21:250
265352584,9sleep026581-21aten2.4_rfpower07:25:230
253232580,2sleep025324-21chrt08:15:170
108412584,8sleep010847-21ssh09:34:240
222022553,7sleep022253-21ps09:01:270
47232540,2sleep04727-21proc_pri07:41:240
69362510,3sleep06931-21ssh10:16:170
155372514,38sleep015575-21munin-run08:00:010
64242504,39sleep06427-21ntpq08:36:040
265832500,3sleep026574-21ssh10:45:520
131052500,3chrt11035-21/usr/sbin/munin12:02:280
107792504,37sleep0439-21sh07:51:090
226742493,37sleep022665-21ntpq12:17:120
204312490,4chrt20430-21/usr/sbin/munin07:15:260
153252497,17sleep015357-21python307:06:010
17003904618,21cyclictest0-21swapper12:22:310
160212460,2chrt16019-21/usr/sbin/munin08:00:260
322632450,4chrt32265-21mailstats09:17:220
1700390455,20cyclictest7789-21munin-run09:30:020
1700390425,10cyclictest3346-21ntpq08:31:070
17003904212,13cyclictest31051-21runrttasks08:24:140
1700390415,10cyclictest12612-21ntpq08:46:030
17003904018,15cyclictest0-21swapper07:35:270
17003904015,9cyclictest24979-21ld09:05:560
17003904014,8cyclictest30820-21ntp_states07:31:100
1700390395,20cyclictest23574-21telnet07:20:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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