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2025-05-16 - 00:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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: 100 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 50 highest latencies:
System rack2slot7s.osadl.org (updated Thu May 15, 2025 12:41:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1475889995238,9cyclictest686983-21cups-browsed08:07:270
1475891994941,5cyclictest1595497-21systemd-run11:25:022
1475889994943,4cyclictest1554645-21aten_r2power_en10:22:190
1475891994637,6cyclictest1597095-21needreboot11:27:302
147589099463,38cyclictest1537403-21ssh09:52:321
1475891994537,5cyclictest1628873-21/usr/sbin/munin12:17:412
1475891994436,5cyclictest1579473-21latency_hist11:00:012
1475891994334,6cyclictest453-21systemd-logind07:45:022
1475890994335,5cyclictest1645880-21latency_hist12:40:051
1475890994335,5cyclictest1584289-21if_wlan011:07:241
1475890994334,6cyclictest686978-21cupsd12:00:021
1475890994334,6cyclictest686978-21cupsd12:00:021
1475890994232,6cyclictest422-21dbus-daemon11:02:351
1475890994133,5cyclictest1572946-21latency_hist10:50:021
1475889994137,2cyclictest0-21swapper/012:15:010
1475890994031,5cyclictest1626163-21proc_pri12:12:351
1475891993931,5cyclictest422-21dbus-daemon11:50:012
1475891993930,5cyclictest1529860-21munin-plugin-st09:40:012
1475890993932,4cyclictest1634863-21latency_hist12:25:011
1475889993926,10cyclictest1542457-21needreboot10:02:290
1475889993926,10cyclictest1511821-21unin-run09:10:020
1475891993831,4cyclictest0-21swapper/211:02:412
1475889993828,7cyclictest1641862-21idleruntime-cro12:35:010
1475889993819,13cyclictest151ktimers/011:12:330
1475889993819,13cyclictest151ktimers/011:12:330
1475891993729,5cyclictest1587676-21latency11:12:272
1475891993729,5cyclictest1587676-21latency11:12:272
1475891993729,5cyclictest0-21swapper/210:20:012
1475891993729,5cyclictest0-21swapper/210:20:012
1475891993726,6cyclictest686983-21cups-browsed11:37:422
1475890993730,4cyclictest1562973-21cron10:35:001
1475890993730,4cyclictest1562973-21cron10:35:001
147588999375,27cyclictest422-21dbus-daemon09:02:300
1475889993729,5cyclictest1597043-21missed_timers11:27:290
147588999371,19cyclictest1537424-21ssh09:52:330
1475891993628,5cyclictest1634863-21munin-plugin-st12:25:012
1475891993628,5cyclictest1614361-21latency_hist11:55:022
1475891993628,5cyclictest1541017-21munin-run10:00:012
1475891993627,5cyclictest957-21mta-sts-daemon11:19:402
1475890993629,4cyclictest1550320-21cron10:15:011
1475890993628,5cyclictest1622520-21proc_pri12:07:371
1475890993627,5cyclictest955-21mta-sts-daemon10:52:421
1475890993624,9cyclictest266-21systemd-journal11:13:461
1475890993624,9cyclictest266-21systemd-journal11:13:461
1475889993629,4cyclictest1511793-21diskmemload11:45:020
1475889993624,3cyclictest0-21swapper/010:10:010
1475891993527,5cyclictest1567524-21tail10:42:182
1475891993522,10cyclictest1541893-21basename10:02:202
1475890993527,5cyclictest1518240-21cron09:20:011
1475890993527,5cyclictest1518240-21cron09:20:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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