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2026-03-16 - 19:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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 here to display the system's profile data or here to proceed to next system.
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: 50.5 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rack5slot7s.osadl.org (updated Mon Mar 16, 2026 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14749224492212,89sleep00-21swapper07:09:150
148789916315,43cyclictest16741-21memory07:20:530
148789916018,25cyclictest26227-21munin-run08:20:030
148789915920,108cyclictest531-21apt-get09:00:200
148789915918,23cyclictest23818-21df_inode11:20:360
148789915822,31cyclictest24036-21diskstats08:05:320
148789915816,101cyclictest15681-21munin-node07:15:130
148789915811,37cyclictest27868-21/usr/sbin/munin11:45:370
148789915810,25cyclictest28577-21cstates11:50:220
148789915717,113cyclictest21522-21apt-get07:50:240
148789915715,118cyclictest22409-21df07:55:240
148789915712,122cyclictest7210-21apt-get09:40:380
148789915620,27cyclictest26458-21diskstats08:20:340
148789915613,28cyclictest23216-21grep11:16:350
148789915516,26cyclictest5463-21if_err_eth009:30:350
148789915420,31cyclictest32502-21apt-get12:15:210
148789915415,118cyclictest11222-21head10:01:020
148789915415,115cyclictest19299-21munin-run10:55:010
148789915413,99cyclictest20103-21munin-run11:00:020
148789915412,120cyclictest16382-21munin-run07:20:020
148789915412,101cyclictest18953-21cstates07:35:240
148789915411,120cyclictest21183-21cut07:47:010
148789915323,28cyclictest19703-21apt-get07:40:220
148789915319,107cyclictest14844-21memory10:25:440
148789915317,24cyclictest31468-21df08:50:260
148789915315,114cyclictest25126-21grep11:26:040
148789915314,115cyclictest2484-21apt-get12:30:240
14878991529,119cyclictest410-21munin-run09:00:020
148789915215,114cyclictest28763-21apt08:35:110
148789915214,114cyclictest15812-21awk10:30:540
148789915213,39cyclictest4192-21munin-run12:40:010
148789915213,115cyclictest9653-21sshd09:53:350
148789915212,116cyclictest8186-21apt-get09:45:250
148789915212,116cyclictest29581-21grep11:55:470
148789915212,115cyclictest25145-21find08:10:580
148789915211,25cyclictest2743-21grep09:11:020
148789915210,28cyclictest1594-21ls09:05:460
148789915210,118cyclictest10409-21sed09:56:030
148789915123,23cyclictest0-21swapper07:30:060
148789915122,101cyclictest1779-21diskstats12:25:300
148789915114,113cyclictest27188-21/usr/sbin/munin11:40:470
148789915112,99cyclictest21060-21/usr/sbin/munin11:05:540
148789915111,113cyclictest6197-21apt-get09:35:120
148789915017,94cyclictest16368-21irqstats10:35:380
148789915015,25cyclictest4442-21/usr/sbin/munin09:25:030
148789915015,106cyclictest30120-21apt-get12:00:170
148789915014,27cyclictest28629-21munin-run08:35:040
148789915013,113cyclictest20975-21ls11:05:020
148789914933,24cyclictest12109-21latency_hist10:10:040
148789914917,21cyclictest27247-21df_inode08:25:310
148789914915,25cyclictest29897-21diskstats08:40:420
148789914915,24cyclictest12289-21diskstats10:10:320
148789914914,112cyclictest17471-21tr10:40:570
148789914815,25cyclictest26094-21apt-get11:35:170
148789914812,23cyclictest31003-21wc08:45:560
148789914720,27cyclictest25298-21apt-get11:30:200
148789914720,27cyclictest18326-21memory07:30:450
148789914715,107cyclictest872-21/usr/sbin/munin12:20:340
148789914713,24cyclictest2965-21cpu09:15:200
148789914627,98cyclictest0-21swapper10:16:000
148789914614,21cyclictest14102-21/usr/sbin/munin10:20:490
148789914613,23cyclictest31606-21munin-run12:10:010
148789914611,24cyclictest18280-21cat10:45:570
148789914611,113cyclictest22486-21head11:11:030
148789914525,21cyclictest0-21swapper09:25:580
148789914520,101cyclictest23135-21apt-get08:00:170
148789914515,25cyclictest31703-21/usr/sbin/munin12:10:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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