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2026-04-20 - 22:08

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 the 100 highest latencies:
System rack5slot7s.osadl.org (updated Mon Apr 20, 2026 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15237224562200,97sleep00-21swapper07:06:470
156419916319,24cyclictest20643-21irqstats07:40:400
156419916116,52cyclictest12420-21apt-get10:10:240
156419915915,121cyclictest29981-21munin-run08:40:040
156419915714,100cyclictest16654-21grep10:31:070
156419915641,24cyclictest30817-21ntp_states12:00:500
156419915619,28cyclictest26579-21diskstats11:35:330
156419915618,25cyclictest3241-21apt-get09:15:150
156419915616,23cyclictest16432-21/usr/sbin/munin07:15:090
156419915527,18cyclictest0-21swapper09:56:010
156419915521,31cyclictest15081-21apt-get10:25:330
156419915516,117cyclictest1956-21apt-get12:26:170
156419915515,117cyclictest28000-21ntp_states08:25:510
156419915515,110cyclictest22563-21df_inode11:10:310
156419915439,93cyclictest23352-21df11:15:280
156419915431,100cyclictest3158-21apt-get12:30:220
156419915420,107cyclictest22058-21apt-get07:50:210
156419915418,49cyclictest14909-21munin-run10:25:000
156419915414,116cyclictest2685-21memory09:10:460
156419915414,100cyclictest27394-21df11:40:270
156419915412,40cyclictest5840-21wc09:30:050
156419915412,117cyclictest1141-21munin-run12:20:020
15641991539,120cyclictest8775-21fgrep09:45:580
156419915315,26cyclictest21261-21/usr/sbin/munin07:46:050
156419915314,115cyclictest17526-21apt10:40:020
156419915314,100cyclictest9508-21grep09:50:550
15641991529,101cyclictest6416-21cat09:31:000
156419915226,19cyclictest0-21swapper12:25:080
156419915216,23cyclictest6999-21grep09:35:510
156419915213,24cyclictest20738-21munin-run11:00:010
156419915210,118cyclictest32667-21uname08:55:400
156419915120,25cyclictest24472-21apt-get08:05:180
156419915118,105cyclictest32091-21apt-get12:10:210
156419915113,97cyclictest14095-21munin-run10:20:010
156419915112,25cyclictest16885-21cat07:15:360
156419915112,117cyclictest23657-21wc08:00:060
156419915111,114cyclictest19363-21grep07:31:010
156419915110,41cyclictest272-21snmpd11:51:010
156419915020,100cyclictest24876-21apt-get11:25:200
156419915016,25cyclictest4588-21grep09:21:310
156419915015,28cyclictest31294-21/usr/sbin/munin12:05:540
156419915015,107cyclictest26887-21/usr/sbin/munin08:20:340
156419915012,23cyclictest30361-21cron12:00:010
156419915011,115cyclictest30388-21ntp_kernel_err08:40:480
156419915010,26cyclictest1021-21awk09:00:360
156419914927,101cyclictest0-21swapper07:25:000
156419914917,27cyclictest24186-21df_inode11:20:290
156419914915,111cyclictest7510-21apt-get09:40:270
156419914913,110cyclictest1641-21/usr/sbin/munin09:05:470
156419914840,89cyclictest32455-21latency_hist08:55:050
156419914823,99cyclictest11672-21diskstats10:05:350
156419914818,100cyclictest10873-21diskstats10:00:320
156419914817,47cyclictest25775-21df11:30:260
156419914816,22cyclictest17752-21df10:40:270
156419914816,20cyclictest0-21swapper08:30:520
156419914816,110cyclictest25439-21irqstats08:10:400
156419914816,109cyclictest272-21snmpd10:47:170
156419914815,26cyclictest28589-21/usr/sbin/munin11:46:010
156419914814,24cyclictest23672-21/usr/sbin/munin08:00:350
156419914814,111cyclictest30894-21/usr/sbin/munin08:45:350
156419914718,27cyclictest19353-21diskstats10:50:350
156419914718,25cyclictest4187-21df_inode12:35:360
156419914715,23cyclictest19646-21apt-get07:35:190
156419914535,90cyclictest26485-21fgrep08:15:580
156419914519,26cyclictest21654-21apt-get11:05:220
156419914519,25cyclictest18715-21users07:26:070
156419914515,22cyclictest20958-21df11:00:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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