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2026-03-19 - 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 highest latencies:
System rack5slot7s.osadl.org (updated Wed Mar 18, 2026 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17330224412186,96sleep00-21swapper07:09:260
174419916512,125cyclictest31752-21/usr/sbin/munin08:35:330
174419916413,108cyclictest3726-21grep12:16:490
174419916116,24cyclictest23310-21apt-get11:00:160
174419916113,123cyclictest19205-21uname10:35:390
174419916111,125cyclictest17006-21grep10:20:540
174419916027,50cyclictest0-21swapper07:30:220
174419916019,113cyclictest2284-21apt-get12:10:180
174419916018,25cyclictest14685-21apt-get10:07:000
174419915817,21cyclictest24417-21df_inode11:05:330
174419915814,119cyclictest22590-21munin-run07:40:020
174419915812,122cyclictest1507-21cat08:46:030
174419915811,122cyclictest10445-21cut09:41:060
174419915716,116cyclictest27049-21df_inode08:05:260
174419915517,97cyclictest21343-21munin-run10:50:020
174419915516,23cyclictest26836-21df11:20:250
174419915515,115cyclictest25218-21diskstats11:10:340
174419915514,42cyclictest17646-21diskstats07:10:340
174419915512,26cyclictest6420-21cat09:20:000
174419915512,118cyclictest21341-21apt-get10:51:480
174419915510,25cyclictest29366-21/usr/sbin/munin08:20:340
174419915417,113cyclictest803-21diskstats12:00:330
174419915413,24cyclictest17865-21find10:25:550
17441991539,27cyclictest5343-21sendmail_mailqu09:10:560
174419915379,51cyclictest7231-21munin-run12:40:030
174419915335,21cyclictest23737-21apt-get07:45:120
174419915317,24cyclictest19611-21diskstats07:20:340
174419915317,109cyclictest30844-21diskstats11:45:330
174419915314,115cyclictest13882-21apt10:05:010
174419915272,56cyclictest20978-21cron07:30:010
174419915221,27cyclictest25903-21apt-get11:15:190
174419915215,113cyclictest4221-21df09:05:260
174419915213,25cyclictest3553-21sort09:00:410
174419915213,115cyclictest2001-21sort12:05:580
174419915212,116cyclictest28321-21/usr/sbin/munin11:30:100
174419915210,98cyclictest572-21munin-run12:00:040
174419915175,53cyclictest9084-21apt-config09:35:250
174419915117,23cyclictest16521-21munin-run10:20:010
174419915113,26cyclictest4555-21/usr/sbin/munin12:21:030
174419915112,25cyclictest32045-21switchtime11:50:590
17441991509,26cyclictest5877-21if_eth012:30:370
174419915028,101cyclictest26076-21latency_hist08:00:060
174419915018,24cyclictest2504-21apt-get08:55:170
174419915015,108cyclictest11078-21ntpq09:45:500
174419915010,115cyclictest28205-21/usr/sbin/munin08:10:580
17441991499,115cyclictest22676-21grep10:55:480
174419914921,102cyclictest15257-21memory10:10:530
174419914919,108cyclictest6719-21irqstats09:20:420
174419914916,107cyclictest29219-21df11:35:260
174419914915,110cyclictest12368-21apt-get09:55:200
174419914912,39cyclictest8827-21munin-run09:35:010
174419914911,117cyclictest22585-21apt-get07:41:140
174419914818,27cyclictest29942-21apt-get11:40:160
174419914818,26cyclictest18909-21memory07:16:000
174419914815,41cyclictest29242-21apt08:20:020
174419914814,35cyclictest7449-21diskstats09:25:340
174419914811,37cyclictest32750-21awk08:40:360
174419914811,29cyclictest20533-21sshd10:44:330
174419914811,26cyclictest4933-21/usr/sbin/munin12:25:520
174419914729,20cyclictest0-21swapper11:26:010
174419914714,109cyclictest24638-21diskstats07:50:330
174419914711,109cyclictest26689-21timerandwakeup08:01:010
174419914616,27cyclictest18409-21irqstats10:30:370
174419914613,22cyclictest30958-21/usr/sbin/munin08:30:460
174419914437,87cyclictest30237-21cstates08:25:220
174419914410,107cyclictest11569-21/usr/sbin/munin09:50:340
174419914316,25cyclictest1808-21df08:50:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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