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2026-04-08 - 03:25

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 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.
Unexpectedly long latencies may be caused by SMIs
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 Wed Apr 08, 2026 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1280575995143,5cyclictest1393310-21unixbench_multi23:00:462
1280575995143,5cyclictest1393310-21unixbench_multi23:00:462
1280573995121,7cyclictest0-21swapper/022:55:330
1280575994940,6cyclictest1054-21mta-sts-daemon00:05:322
1280575994940,6cyclictest1054-21mta-sts-daemon00:05:322
1280574994930,16cyclictest547-21gmain23:00:331
1280574994930,16cyclictest547-21gmain23:00:331
1280573994922,7cyclictest1415224-21sort23:35:260
1280575994840,5cyclictest421-21dbus-daemon23:30:012
1280574994837,8cyclictest1401558-21grep23:15:001
1280573994822,4cyclictest439-21systemd-logind21:45:010
1280574994636,7cyclictest421-21dbus-daemon21:45:011
1280574994636,6cyclictest421-21dbus-daemon21:55:011
1280574994636,5cyclictest0-21swapper/121:19:541
128057499462,37cyclictest1402517-21ssh23:15:311
1280573994619,8cyclictest1441814-21unixbench_multi00:15:430
128057599446,33cyclictest1379716-21ssh22:40:362
128057599443,31cyclictest1317821-21ssh21:10:372
1280575994335,5cyclictest1-21systemd23:50:022
128057499435,9cyclictest171rcu_preempt22:40:331
1280574994335,5cyclictest1342227-21ssh21:45:421
1280573994328,11cyclictest12350irq/32-eth021:10:320
1280575994233,6cyclictest1431064-21cups-browsed00:10:222
1280575994233,6cyclictest1431064-21cups-browsed00:10:222
1280575994231,8cyclictest1389083-21fschecks_count22:55:252
1280574994230,9cyclictest1381138-21kworker/u8:4+nfsiod00:00:321
1280574994230,9cyclictest1381138-21kworker/u8:4+nfsiod00:00:321
1280575994134,4cyclictest1056-21mta-sts-daemon00:00:322
1280575994134,4cyclictest1056-21mta-sts-daemon00:00:322
1280575994132,6cyclictest1360887-21unin-run22:15:012
1280575994132,6cyclictest1360887-21unin-run22:15:012
1280575994131,6cyclictest1324173-21munin-plugin-st21:20:012
1280575994129,8cyclictest1403086-21timerwakeupswit23:15:452
1280574994134,4cyclictest0-21swapper/120:20:011
1280573994131,7cyclictest420-21avahi-daemon22:45:320
1280575994032,5cyclictest1334505-21munin-plugin-st21:35:002
1280574994028,9cyclictest421-21dbus-daemon22:07:461
1280574994028,9cyclictest421-21dbus-daemon22:07:461
128057499401,7cyclictest171rcu_preempt21:25:361
1280573994032,6cyclictest600-21gmain21:05:380
1280575993930,4cyclictest0-21swapper/222:00:312
1280575993930,4cyclictest0-21swapper/222:00:312
1280574993932,4cyclictest0-21swapper/122:40:011
1280574993922,13cyclictest1348328-21needreboot21:55:281
1280573993933,4cyclictest1295549-21munin-run20:00:010
1280573993928,5cyclictest261-21systemd-journal23:20:000
1280575993830,5cyclictest1285098-21systemd-run19:25:012
1280575993830,5cyclictest1283558-21sendmail19:20:012
1280575993829,5cyclictest1431077-21ssh00:00:012
1280574993830,5cyclictest1421378-21latency_hist23:45:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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