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2026-07-28 - 00:01

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 376 highest latencies:
System rack5slot7s.osadl.org (updated Mon Jul 27, 2026 12:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14834224732214,98sleep00-21swapper07:08:190
150679916014,121cyclictest4678-21munin-run12:40:040
150679916014,121cyclictest3690-21date12:35:060
150679915929,107cyclictest0-21swapper10:00:480
150679915814,119cyclictest24979-21memory11:25:450
150679915719,28cyclictest6800-21munin-node07:15:030
150679915715,40cyclictest17990-21munin-run10:45:010
150679915715,118cyclictest21243-21diskstats07:45:370
150679915615,116cyclictest19754-21apt-get10:55:260
150679915613,103cyclictest12190-21threads10:06:000
150679915612,102cyclictest8078-21find09:40:560
150679915531,104cyclictest19372-21mailstats10:51:000
150679915516,116cyclictest4049-21munin-run09:20:020
150679915515,116cyclictest9749-21cat09:50:570
150679915513,26cyclictest2342-21timerwakeupswit09:06:030
150679915511,118cyclictest22476-21ls07:51:000
150679915510,104cyclictest27030-21apt-get11:41:510
150679915417,24cyclictest25243-21diskstats08:10:330
150679915416,24cyclictest358-21memory08:55:460
150679915415,25cyclictest27456-21apt-get08:27:010
150679915322,110cyclictest27057-1kworker/u3:011:45:150
150679915316,25cyclictest16166-21cut10:30:590
150679915316,23cyclictest762-21memory12:15:460
150679915316,112cyclictest2779-21memory09:10:470
150679915314,115cyclictest16644-21irqstats10:35:430
150679915312,27cyclictest23761-21sed11:16:050
150679915235,93cyclictest5702-21apt-get09:31:220
150679915215,113cyclictest4839-21awk09:21:080
150679915211,26cyclictest29205-21grep08:31:110
150679915211,100cyclictest21943-21zcat11:05:550
150679915210,119cyclictest27045-21dpkg11:40:020
150679915118,23cyclictest21030-21apt07:45:010
150679915117,23cyclictest30080-21munin-run08:40:020
150679915117,109cyclictest31791-21apt-get08:50:170
150679915116,108cyclictest24187-21sshd11:20:460
150679915114,25cyclictest17152-21cpu07:20:220
150679915113,112cyclictest30197-21/usr/sbin/munin08:40:430
150679915112,115cyclictest10737-21latency_hist10:00:010
150679915111,116cyclictest26559-21sed08:16:020
150679915110,27cyclictest1528-21grep09:01:050
150679915110,118cyclictest13671-21fgrep10:15:560
15067991509,119cyclictest31219-21sed12:01:030
150679915018,25cyclictest5636-21users09:26:080
150679915017,103cyclictest32184-21apt-get12:10:180
150679915016,111cyclictest16398-21df07:15:430
150679915014,24cyclictest8871-21wc09:45:570
150679915014,23cyclictest29214-21memory11:50:460
150679915011,23cyclictest18358-21sendmail_mailqu07:25:570
150679915011,114cyclictest30466-21latency_hist12:00:010
15067991499,117cyclictest22788-21wc07:55:240
150679914916,23cyclictest31628-21memory12:05:450
15067991489,39cyclictest15019-21if_eth010:25:380
15067991488,19cyclictest2048-21latency_hist12:25:020
150679914818,28cyclictest19627-21diskstats07:35:360
150679914818,105cyclictest18087-21/usr/sbin/munin10:46:080
150679914816,23cyclictest23012-21apt11:15:010
150679914816,109cyclictest13103-21users10:11:100
150679914815,110cyclictest6927-21df09:35:310
150679914812,40cyclictest27180-21zcat08:20:560
150679914811,37cyclictest2361-21sort12:25:410
150679914811,115cyclictest25745-21sort11:30:420
150679914718,105cyclictest13436-21snmpd08:46:350
150679914717,25cyclictest24448-21diskstats08:05:320
150679914622,26cyclictest14079-21apt-get10:20:180
150679914614,111cyclictest21425-21munin-run11:05:010
150679914611,110cyclictest18851-21if_err_eth007:30:370
150679914216,23cyclictest23545-21apt-get08:00:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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