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2026-04-20 - 16:59

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 100 highest latencies:
System rack2slot7s.osadl.org (updated Mon Apr 20, 2026 12:43:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1678507995345,5cyclictest1-21systemd11:20:012
1678505995332,14cyclictest12350irq/32-eth010:30:370
1678505995332,14cyclictest12350irq/32-eth010:30:370
1678506995143,5cyclictest1752024-21needreboot09:55:371
1678505995142,6cyclictest12350irq/32-eth007:40:430
1678505994922,20cyclictest12350irq/32-eth009:20:420
1678507994738,6cyclictest1-21systemd09:35:482
1678507994738,6cyclictest1-21systemd09:35:482
1678507994640,3cyclictest0-21swapper/209:45:502
1678507994635,8cyclictest1807696-21munin-plugin-st11:05:012
1678506994622,4cyclictest0-21swapper/112:05:371
167850599461,35cyclictest659-21snmpd11:15:450
167850599452,31cyclictest1752191-21ssh09:55:420
1678506994436,5cyclictest1718566-21munin-plugin-st09:15:011
1678506994433,7cyclictest548-21gdbus11:45:581
1678505994432,9cyclictest0-21swapper/012:40:010
1678505994427,9cyclictest0-21swapper/011:25:510
1678507994335,5cyclictest1787436-21munin-run10:40:002
1678506994334,6cyclictest1735306-21aten_r2power_en09:35:301
1678506994334,6cyclictest1735306-21aten_r2power_en09:35:301
1678505994326,12cyclictest12350irq/32-eth012:00:400
167850599431,34cyclictest1841236-21ssh11:45:420
1678507994234,5cyclictest1868324-21systemd-run12:20:012
1678507994233,6cyclictest1849914-21head11:55:532
167850699423,30cyclictest1739998-21ssh09:40:441
167850699423,30cyclictest1739998-21ssh09:40:441
1678505994233,7cyclictest1807712-21sh11:05:010
1678505994227,12cyclictest1698050-21latency_hist08:15:020
1678505994210,20cyclictest428-21mta-sts-daemon08:40:460
1678506994117,4cyclictest0-21swapper/107:55:411
1678507994031,5cyclictest1771264-21sh10:20:012
1678507994026,7cyclictest1711503-21sh09:00:012
1678506994031,6cyclictest856451-21cupsd11:20:481
1678506994029,8cyclictest1711470-21/usr/sbin/munin09:00:021
1678507993931,5cyclictest1884550-21latency_hist12:40:022
1678507993931,5cyclictest1709578-21mailstats08:50:482
1678506993931,5cyclictest1720356-21unixbench-2d09:15:521
1678506993931,5cyclictest1703996-21systemd-run08:35:011
1678506993931,5cyclictest1703996-21systemd-run08:35:011
1678506993931,5cyclictest1699523-21systemd-run08:20:011
1678506993930,6cyclictest420-21avahi-daemon07:45:011
1678505993932,5cyclictest421-21dbus-daemon10:10:010
1678505993932,5cyclictest1823888-21ssh11:25:010
1678505993922,10cyclictest12350irq/32-eth011:40:480
1678507993829,6cyclictest1694995-21cut08:05:012
1678506993831,4cyclictest1803682-21latency_hist11:00:021
1678506993827,8cyclictest1853755-21/usr/sbin/munin12:00:511
1678506993827,8cyclictest1731705-21latency09:30:361
1678506993824,10cyclictest1763946-21sort10:10:331
1678505993831,4cyclictest151ktimers/010:00:450
1678505993829,6cyclictest151ktimers/009:45:500
167850599381,33cyclictest1857389-21ssh12:05:390
1678507993729,5cyclictest1724528-21head09:20:532
1678507993728,7cyclictest695-21cron11:55:012
1678507993728,6cyclictest1771851-21aten_r2power_po10:20:292
1678507993728,5cyclictest1055-21mta-sts-daemon10:31:462
1678507993728,5cyclictest1055-21mta-sts-daemon10:31:462
1678507993727,6cyclictest1828995-21needreboot11:30:362
1678506993728,6cyclictest1811765-21ssh11:10:021
167850699372,28cyclictest1788717-21ssh10:40:411
167850599378,25cyclictest1776568-21ssh10:25:420
1678505993729,5cyclictest1811937-21latency_hist11:10:030
1678505993727,7cyclictest420-21avahi-daemon12:10:330
1678505993727,5cyclictest0-21swapper/009:35:440
1678505993727,5cyclictest0-21swapper/009:35:440
1678505993726,8cyclictest1833392-21mailstats11:35:510
167850599371,30cyclictest1796864-21ssh10:50:430
1678507993628,5cyclictest1877151-21rm12:30:322
1678507993628,5cyclictest1839986-21ssh11:45:012
1678507993628,5cyclictest1823914-21wc11:25:022
1678507993628,5cyclictest1815773-21ls11:15:012
1678507993628,5cyclictest1815773-21ls11:15:012
1678507993628,5cyclictest1681488-21ls07:20:012
1678507993623,10cyclictest1714508-21unin-run09:10:012
1678506993628,5cyclictest1837745-21grep11:40:531
1678506993628,5cyclictest1054-21mta-sts-daemon11:14:451
1678506993628,5cyclictest1054-21mta-sts-daemon11:14:451
1678506993627,6cyclictest420-21avahi-daemon07:25:481
1678506993627,6cyclictest1705516-21systemd-run08:40:011
1678506993627,6cyclictest1705516-21systemd-run08:40:011
1678506993626,7cyclictest261-21systemd-journal11:31:321
1678505993629,4cyclictest1722693-21latency_hist09:20:020
1678505993617,14cyclictest624-21lldpd11:31:290
167850799353,28cyclictest1861433-21ssh12:10:412
1678507993527,5cyclictest1779361-21munin-plugin-st10:30:012
1678506993528,4cyclictest0-21swapper/112:20:011
1678506993527,5cyclictest1701326-21aten_r2power_fr08:25:291
1678506993526,6cyclictest1833289-21sh11:35:501
167850699352,25cyclictest1873596-21ssh12:25:411
1678505993529,3cyclictest0-21swapper/009:25:450
1678505993529,3cyclictest0-21swapper/009:10:010
1678505993528,4cyclictest1852111-21awk12:00:000
1678505993521,5cyclictest151ktimers/010:45:430
1678507993427,4cyclictest0-21swapper/212:10:002
1678507993427,3cyclictest0-21swapper/209:35:012
1678507993426,5cyclictest1841023-21cat11:45:362
1678507993426,5cyclictest1791514-21cron10:45:002
1678507993425,6cyclictest420-21avahi-daemon10:47:232
1678507993425,5cyclictest1-21systemd09:10:482
167850699343,23cyclictest1784628-21ssh10:35:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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