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2026-04-27 - 14:43

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 Mon Apr 27, 2026 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12891224342192,97sleep00-21swapper07:09:510
129519916316,122cyclictest31183-21apt09:00:010
129519916211,127cyclictest1983-21sort09:20:050
129519916139,23cyclictest13290-21latency_hist10:30:050
129519916036,102cyclictest32216-21/usr/sbin/munin12:20:490
12951991599,122cyclictest25827-21grep08:25:560
129519915714,102cyclictest27981-21munin-run08:40:020
129519915614,25cyclictest15926-21diskstats07:25:350
129519915614,119cyclictest7642-21cat09:55:050
129519915613,37cyclictest23312-21sshd08:10:470
129519915610,105cyclictest27297-21apt-get11:56:500
129519915517,23cyclictest18238-21munin-run11:00:020
129519915515,101cyclictest26764-21awk08:31:320
129519915514,117cyclictest30114-21gpg-connect-age12:10:120
129519915514,117cyclictest15746-21sort10:41:100
129519915416,37cyclictest19199-21irqstats07:45:370
129519915415,98cyclictest28793-21apt08:45:010
129519915415,100cyclictest20518-21apt07:55:010
129519915412,121cyclictest14161-21sed10:35:120
12951991539,120cyclictest13664-21grep07:11:040
129519915317,110cyclictest17580-21irqstats07:35:380
129519915315,116cyclictest18404-21irqstats07:40:370
12951991529,118cyclictest2316-21cut12:35:580
129519915231,102cyclictest19054-21apt-get11:06:150
129519915220,25cyclictest29688-21apt-get08:50:150
129519915214,115cyclictest28565-21df_inode12:00:360
129519915211,98cyclictest10857-21wc10:15:050
129519915211,23cyclictest32001-21munin-run09:05:010
129519915210,36cyclictest17304-21apt07:35:010
129519915119,106cyclictest22052-21memory11:20:430
129519915117,27cyclictest543-21df09:10:290
129519915117,110cyclictest31176-21df_inode12:15:370
129519915115,23cyclictest408-21irqstats12:25:360
129519915112,41cyclictest272-21snmpd11:50:430
129519915037,92cyclictest12026-21sh10:20:510
129519915011,119cyclictest18362-1kworker/u3:311:10:130
129519915011,116cyclictest13998-21munin-plugin-st10:35:010
129519914920,102cyclictest10875-21apt-get10:15:200
129519914919,25cyclictest32101-21apt-get09:05:180
129519914915,38cyclictest24897-21munin-run11:40:020
129519914914,30cyclictest2067-21/usr/sbin/munin09:20:370
129519914914,22cyclictest20862-21memory07:55:450
129519914914,111cyclictest6169-21df09:45:250
129519914910,42cyclictest21811-21wc08:00:530
129519914825,21cyclictest16487-21timerandwakeup10:46:000
129519914820,27cyclictest3660-21apt-get09:30:200
129519914819,24cyclictest9384-21df10:05:280
129519914814,22cyclictest22709-21df_inode11:25:290
129519914814,111cyclictest7964-21awk09:55:480
129519914813,113cyclictest29068-21irqstats08:45:410
129519914812,26cyclictest29250-21/usr/sbin/munin12:06:080
129519914812,111cyclictest8481-21/usr/sbin/munin10:00:360
129519914811,112cyclictest22777-21threads08:06:010
129519914717,107cyclictest3521-21users09:26:060
129519914714,24cyclictest14298-21diskstats07:15:530
129519914713,33cyclictest18361-21kworker/u2:211:00:130
129519914713,110cyclictest25952-21cat11:45:360
129519914710,28cyclictest24184-21/usr/sbin/munin08:15:550
129519914620,27cyclictest15677-21users07:21:070
129519914612,109cyclictest16805-21/usr/sbin/munin10:50:220
129519914611,111cyclictest1656-21head12:31:020
129519914515,106cyclictest5385-21df_inode09:40:300
129519914514,26cyclictest4733-21/usr/sbin/munin09:35:470
129519914513,26cyclictest23708-21ntpq11:30:500
129519914512,113cyclictest24771-21sh08:20:300
129519914415,28cyclictest25014-21/usr/sbin/munin11:40:350
129519914310,111cyclictest21722-21wc11:20:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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