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2026-07-17 - 14:31

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 Fri Jul 17, 2026 12:43:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1956005996224,12cyclictest12650irq/32-eth010:30:410
1956007995746,7cyclictest2038363-21kernelversion10:25:412
1956006995638,15cyclictest2082924-21grep11:40:011
1956006995633,20cyclictest2092690-21fschecks_count11:55:361
1956007995445,6cyclictest1002-21mta-sts-daemon12:25:412
1956007995442,7cyclictest2089642-21fschecks_count11:50:342
1956007995442,7cyclictest2089642-21fschecks_count11:50:342
1956007995242,5cyclictest0-21swapper/208:40:012
1956006995024,5cyclictest0-21swapper/109:15:021
1956006995023,3cyclictest0-21swapper/112:00:481
1956005995013,32cyclictest2081056-21ssh11:35:450
1956007994938,6cyclictest0-21swapper/211:10:492
195600699497,5cyclictest171rcu_preempt10:30:431
1956007994840,4cyclictest0-21swapper/212:30:402
1956007994734,10cyclictest1-21systemd09:25:512
1956006994728,15cyclictest0-21swapper/112:35:431
1956006994726,17cyclictest567-21gdbus09:15:141
1956006994725,2cyclictest0-21swapper/108:35:011
1956007994635,7cyclictest2001164-21cron09:25:012
195600699468,15cyclictest441-21thd10:05:461
1956006994626,16cyclictest0-21swapper/109:35:531
1956006994622,4cyclictest0-21swapper/111:45:011
1956005994635,6cyclictest151ktimers/010:50:430
1956005994633,6cyclictest151ktimers/008:05:510
1956005994633,6cyclictest151ktimers/008:05:510
1956007994432,7cyclictest420-21avahi-daemon12:21:082
1956005994437,4cyclictest1995085-21latency_hist09:15:020
1956005994433,5cyclictest151ktimers/008:45:460
1956007994333,7cyclictest2024054-21unixbench_multi10:00:552
1956006994335,5cyclictest1963514-21systemd-run07:35:021
1956005994329,11cyclictest2007248-21systemd-run09:35:020
1956007994232,6cyclictest2050702-21ntp_kernel_pll_10:45:422
195600799422,32cyclictest2080940-21ssh11:35:402
1956005994234,5cyclictest439-21systemd-logind10:00:010
1956006994134,4cyclictest0-21swapper/110:10:511
1956005994131,7cyclictest1998118-21idleruntime-cro09:20:010
195600799409,20cyclictest421-21dbus-daemon07:20:452
1956007994033,3cyclictest2092104-21kworker/u8:9-xprtiod11:57:502
1956007994032,5cyclictest1000-21mta-sts-daemon11:16:002
1956007994031,4cyclictest0-21swapper/210:40:012
1956007994030,6cyclictest1002-21mta-sts-daemon11:00:122
195600799400,33cyclictest2096155-21ssh12:00:432
1956006994031,6cyclictest0-21swapper/112:05:441
1956005994031,4cyclictest0-21swapper/010:25:520
1956007993931,4cyclictest2031479-21kworker/u8:4-xprtiod10:55:572
1956007993930,6cyclictest1987699-21latency_hist08:55:032
195600699395,28cyclictest2005465-21grep09:30:501
1956006993930,6cyclictest2108809-21unixbench_singl12:20:541
1956005993932,4cyclictest2098438-21/usr/sbin/munin12:05:410
1956005993928,8cyclictest2085934-21cron11:45:010
1956007993828,5cyclictest0-21swapper/210:15:472
1956007993827,8cyclictest1991306-21needreboot09:05:402
195600799381,29cyclictest2105226-21ssh12:15:472
1956006993830,5cyclictest2087632-21unixbench_singl11:45:541
1956006993830,5cyclictest2087632-21unixbench_singl11:45:541
1956006993830,5cyclictest2060357-21unixbench_multi11:00:551
1956006993829,3cyclictest0-21swapper/110:40:421
1956006993828,7cyclictest1969472-21cron07:55:011
1956006993828,4cyclictest0-21swapper/110:20:461
1956005993832,3cyclictest0-21swapper/010:55:370
1956005993831,4cyclictest2010266-21grep09:40:010
1956005993829,5cyclictest151ktimers/008:15:470
1956005993829,5cyclictest151ktimers/008:15:470
195600799373,25cyclictest2035686-21ssh10:20:482
1956007993729,5cyclictest1976002-21fschecks_count08:15:372
1956007993729,5cyclictest1976002-21fschecks_count08:15:372
1956007993728,6cyclictest1973030-21fschecks_time08:05:392
1956007993728,6cyclictest1973030-21fschecks_time08:05:392
1956007993728,5cyclictest1003-21mta-sts-daemon11:48:192
1956007993728,5cyclictest1003-21mta-sts-daemon11:48:192
1956007993722,10cyclictest1149763-21cups-browsed10:14:192
1956006993730,4cyclictest2113133-21ssh12:30:011
1956006993729,5cyclictest2016896-21aten_r2power_vo09:50:321
1956006993729,5cyclictest1992150-21latency_hist09:10:021
1956006993727,7cyclictest2114010-21latency12:30:371
1956006993727,6cyclictest420-21avahi-daemon11:05:541
1956006993726,8cyclictest2058669-21sendmail11:00:011
195600599374,27cyclictest665-21snmpd07:10:420
1956005993730,4cyclictest2102732-21unixbench_multi12:10:550
1956005993730,4cyclictest2050674-21ntpq10:45:420
1956005993730,3cyclictest0-21swapper/012:20:430
1956005993728,7cyclictest1981459-21kworker/u8:0-nfsiod08:35:010
1956005993726,8cyclictest1964296-21needreboot07:35:400
1956005993722,11cyclictest420-21avahi-daemon12:25:430
1956005993719,13cyclictest2043789-21kworker/u8:10+rpciod10:40:420
195600599371,33cyclictest1991994-21diskmemload11:25:430
1956007993628,5cyclictest2071517-21sort11:20:362
1956007993628,5cyclictest2014701-21mailstats09:45:532
1956006993628,5cyclictest1975489-21grep08:15:001
1956005993630,4cyclictest2013778-21aten_r2power_en09:45:340
1956005993628,6cyclictest2034479-21grep10:20:010
195600799353,23cyclictest2084126-21rm11:40:492
1956007993527,4cyclictest1002-21mta-sts-daemon09:12:172
1956007993527,4cyclictest0-21swapper/211:35:032
1956007993526,6cyclictest1986010-21systemd-run08:50:012
1956007993526,6cyclictest1003-21mta-sts-daemon11:06:082
1956007993526,5cyclictest1001-21mta-sts-daemon12:09:432
195600799352,23cyclictest2020461-21ssh09:55:442
195600699354,23cyclictest2068909-21ssh11:15:451
1956006993528,4cyclictest2105471-21mailstats12:15:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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