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2026-06-29 - 04:39

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 Mon Jun 29, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7090224392208,87sleep00-21swapper19:09:230
72049916415,124cyclictest25884-21apt21:00:010
72049916214,122cyclictest26226-21/usr/sbin/munin00:16:000
72049916116,25cyclictest15791-21munin-run20:00:030
72049916018,114cyclictest21896-21apt-get23:51:190
72049916015,121cyclictest1091-21ntp_states21:45:520
72049915945,23cyclictest8920-21mailstats22:30:590
72049915817,39cyclictest3069-21munin-run22:00:020
72049915816,25cyclictest11879-21/usr/sbin/munin19:35:510
72049915816,101cyclictest15810-21apt-get23:12:000
72049915813,121cyclictest28635-21memory21:15:440
72049915812,46cyclictest21643-21latency_hist20:35:010
72049915716,99cyclictest27957-21df00:25:250
72049915715,120cyclictest19475-21diskstats20:20:340
72049915713,26cyclictest6495-21grep22:16:580
72049915713,123cyclictest19243-21kworker/u2:1623:35:010
72049915617,113cyclictest10077-21apt-get22:40:170
72049915530,90cyclictest3750-21kworker/u2:1222:01:390
72049915519,107cyclictest16942-21apt-get20:05:240
72049915515,27cyclictest28652-21/usr/sbin/munin00:30:230
72049915515,25cyclictest27160-21df00:20:240
72049915512,119cyclictest4909-21munin-run22:10:010
72049915438,93cyclictest18124-21proc_pri23:25:530
72049915420,112cyclictest15786-21apt-get20:01:060
72049915414,97cyclictest14416-21df23:05:250
72049915414,24cyclictest18958-21find20:15:590
72049915411,26cyclictest26881-21wc21:05:250
72049915316,114cyclictest17661-21apt23:25:020
72049915314,26cyclictest11647-21/usr/sbin/munin22:47:030
72049915314,115cyclictest23036-21mailstats20:40:570
72049915311,117cyclictest23407-21/usr/sbin/munin20:45:510
72049915311,117cyclictest21883-21sshd23:49:250
72049915218,111cyclictest13618-21df23:00:250
72049915217,37cyclictest30125-21df21:25:270
72049915216,113cyclictest7181-21apt-get19:11:330
72049915215,38cyclictest32317-21munin-run21:40:020
72049915215,114cyclictest14194-21munin-run19:50:020
72049915213,97cyclictest24394-21apt-get20:50:280
72049915120,37cyclictest27700-21df21:10:260
72049915114,95cyclictest12794-21df22:55:250
72049915114,113cyclictest23954-21diskstats00:00:330
72049915114,112cyclictest20291-21munin-run23:40:020
72049915017,46cyclictest1674-21df_inode21:50:280
72049915017,26cyclictest16140-21apt-get23:15:270
72049915016,95cyclictest17831-21df20:10:270
72049915016,47cyclictest26183-21irqstats21:00:400
72049915016,25cyclictest29691-21memory00:35:460
72049915016,25cyclictest20252-21df20:25:250
72049915015,113cyclictest7763-21df22:25:250
72049915015,110cyclictest8247-21munin-node19:15:080
72049915013,23cyclictest29327-21df21:20:270
72049915013,113cyclictest22449-21munin-run20:40:030
72049915012,113cyclictest9429-21irqstats22:35:410
72049914913,113cyclictest23718-21apt00:00:010
72049914912,114cyclictest14928-21unixbench_singl19:51:040
72049914910,22cyclictest12997-21ntpq19:40:480
72049914830,18cyclictest0-21swapper19:25:510
72049914817,24cyclictest25433-21apt-get00:10:180
72049914816,23cyclictest25294-21users00:06:060
72049914813,21cyclictest9498-21apt-get19:20:190
72049914719,29cyclictest12004-21df_inode22:50:350
72049914710,118cyclictest19886-21kworker/u2:823:40:120
72049914619,101cyclictest32437-21apt-get21:40:140
72049914616,25cyclictest5009-21apt-get22:10:120
72049914614,110cyclictest7241-21wc22:21:010
72049914512,111cyclictest30027-1kworker/u3:321:30:140
72049914413,26cyclictest11200-21diskstats19:30:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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