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2026-05-07 - 23:36

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 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 highest latencies:
System rack5slot7s.osadl.org (updated Thu May 07, 2026 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10315224232188,87sleep00-21swapper07:07:520
106029916025,113cyclictest17211-21wc11:05:530
106029916016,120cyclictest25436-21munin-run08:40:020
106029915921,28cyclictest7762-21apt-get10:10:200
106029915918,114cyclictest23142-21apt-get08:25:170
106029915915,122cyclictest27043-21apt-get08:51:380
106029915621,108cyclictest17747-21diskstats11:10:320
106029915616,38cyclictest13692-21grep10:45:460
106029915515,116cyclictest11408-21munin-node07:15:070
106029915514,99cyclictest28725-21users12:16:050
106029915418,109cyclictest21515-21apt-get08:15:160
106029915416,26cyclictest20061-21apt-get11:25:120
106029915415,116cyclictest446-21apt09:25:010
106029915412,24cyclictest6050-21munin-run10:00:030
106029915412,117cyclictest10645-21cut10:25:590
106029915410,119cyclictest12567-21cat10:40:060
106029915321,29cyclictest9392-21apt-get10:20:200
106029915315,25cyclictest24766-21wc11:55:030
106029915315,114cyclictest24040-21df_inode08:30:270
106029915314,26cyclictest15795-21apt07:40:010
106029915312,36cyclictest12784-21systemd-journal10:59:070
106029915216,97cyclictest19007-21munin-run08:00:020
106029915216,21cyclictest20042-21snmpd12:28:000
106029915216,113cyclictest27377-21df_inode12:10:280
106029915214,24cyclictest32073-21sshd09:20:030
10602991519,118cyclictest9318-21wc10:20:050
106029915118,41cyclictest3616-21users09:41:070
106029915117,96cyclictest12072-21memory07:16:010
106029915117,24cyclictest864-21ntp_states09:25:490
106029915116,111cyclictest2310-21irqstats09:35:370
106029915113,97cyclictest19549-21tr11:20:480
106029915112,29cyclictest31968-21cron12:40:000
106029915013,113cyclictest12784-21systemd-journal07:44:010
106029915012,29cyclictest29928-21if_err_eth009:05:370
106029915012,24cyclictest31187-21munin-plugin-st12:35:000
106029915012,114cyclictest20042-21snmpd08:45:390
106029914916,110cyclictest23919-21users11:46:060
106029914913,41cyclictest2038-21munin-run09:35:010
106029914913,114cyclictest22345-21apt11:40:010
106029914910,28cyclictest13869-21grep07:25:530
106029914910,115cyclictest4410-21users09:46:050
10602991489,22cyclictest20385-21cut08:05:590
106029914825,103cyclictest0-21swapper08:55:340
106029914818,25cyclictest22472-21apt-get11:40:160
106029914818,24cyclictest11224-21memory10:30:430
106029914817,25cyclictest26213-21users08:41:040
106029914812,38cyclictest19130-21kworker/u2:508:00:120
106029914810,38cyclictest27171-21munin-plugin-st12:10:010
106029914810,25cyclictest19121-21cron11:20:010
106029914810,115cyclictest7392-21wc10:05:560
10602991479,25cyclictest22637-21grep08:20:470
106029914717,27cyclictest29652-21users09:01:040
106029914717,21cyclictest0-21swapper09:13:010
106029914716,107cyclictest12605-21apt-get10:40:170
106029914716,104cyclictest28901-21/usr/sbin/munin12:21:000
106029914713,30cyclictest17017-21ntpq07:45:470
106029914712,26cyclictest25854-21uname12:00:390
106029914710,39cyclictest6462-21ntpq10:00:450
106029914710,38cyclictest4980-21wc09:50:560
106029914616,27cyclictest13021-21ntp_offset07:20:500
106029914616,20cyclictest21548-21munin-run11:35:010
106029914529,19cyclictest0-21swapper07:30:230
106029914519,101cyclictest14293-21df10:50:240
106029914510,98cyclictest16659-21grep11:01:090
106029914418,101cyclictest20720-21apt-get08:10:130
106029914414,102cyclictest24855-21/usr/sbin/munin11:55:210
106029914413,105cyclictest17509-21/usr/sbin/munin07:50:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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