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2026-07-13 - 11:37

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 Jul 13, 2026 00:43:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1823165995645,8cyclictest1866881-21unixbench-2d21:20:510
1823167995341,9cyclictest1895470-21cron22:10:012
1823167994939,7cyclictest1848647-21munin-plugin-st20:35:012
1823167994937,5cyclictest0-21swapper/222:25:432
1823167994737,6cyclictest1000-21mta-sts-daemon00:35:422
1823167994737,6cyclictest0-21swapper/200:30:432
1823166994738,5cyclictest1969251-21timerwakeupswit00:10:551
1823167994639,3cyclictest0-21swapper/221:10:452
1823167994535,6cyclictest1839680-21systemd-run20:05:012
1823167994535,6cyclictest1839680-21systemd-run20:05:012
1823166994537,5cyclictest1913531-21sendmail22:40:011
1823165994537,5cyclictest1835172-21systemd-run19:50:010
1823167994436,5cyclictest1862865-21/usr/sbin/munin21:15:322
1823166994436,5cyclictest1875559-21sh21:35:441
1823167994333,6cyclictest1872167-21/usr/sbin/munin21:30:352
1823166994336,4cyclictest1003-21mta-sts-daemon23:22:021
1823166994335,5cyclictest1-21systemd22:20:011
1823166994335,5cyclictest1-21systemd22:20:011
1823167994133,5cyclictest1974259-21aten_r2power_vo00:20:312
1823167994133,5cyclictest1926083-21aten_r2power_vo23:00:312
1823167994130,7cyclictest420-21avahi-daemon22:50:022
182316799412,33cyclictest1947727-21ssh23:35:432
1823165994135,4cyclictest1913489-21cron22:40:010
1823165994135,3cyclictest1000-21mta-sts-daemon19:20:430
1823165994132,7cyclictest1982736-21ls00:35:010
182316799404,28cyclictest750-21ntpd21:20:412
1823167994033,4cyclictest1889498-21sendmail22:00:012
1823167994032,5cyclictest1979744-21systemd-run00:30:012
1823166994034,4cyclictest1823164-21cyclictest00:20:381
1823166994034,3cyclictest0-21swapper/100:00:011
1823166994029,8cyclictest1887425-21missed_timers21:55:371
182316599406,22cyclictest1926580-21ntpq23:00:380
1823165994028,4cyclictest1001-21mta-sts-daemon20:10:380
1823166993931,5cyclictest1925533-21munin-plugin-st23:00:011
1823166993930,6cyclictest421-21dbus-daemon00:15:301
1823166993930,6cyclictest421-21dbus-daemon00:15:301
1823165993933,4cyclictest1966276-21unixbench-2d00:05:520
1823165993927,9cyclictest0-21swapper/023:45:010
1823167993830,5cyclictest1886486-21sshd21:55:012
1823167993829,5cyclictest1902295-21kernelversion22:20:362
1823166993830,5cyclictest1915144-21tail22:40:541
1823166993829,6cyclictest1985772-21true00:40:011
1823166993828,6cyclictest420-21avahi-daemon22:05:401
182316699382,25cyclictest1860279-21ssh21:10:431
1823165993831,4cyclictest1970726-21sshd00:15:020
1823165993830,5cyclictest1961704-21diskmemload00:00:020
1823165993829,6cyclictest421-21dbus-daemon23:52:290
1823165993829,5cyclictest421-21dbus-daemon22:01:590
1823165993825,9cyclictest151ktimers/023:45:460
1823167993731,3cyclictest0-21swapper/221:50:002
1823167993728,6cyclictest0-21swapper/223:10:032
1823167993728,6cyclictest0-21swapper/223:10:032
1823167993728,6cyclictest0-21swapper/220:20:012
1823166993732,2cyclictest0-21swapper/120:40:011
1823166993729,5cyclictest89824-21cups-browsed23:49:441
1823165993731,3cyclictest0-21swapper/023:25:020
1823165993730,4cyclictest665-21snmpd21:30:350
1823165993725,6cyclictest1001-21mta-sts-daemon21:40:310
1823165993725,6cyclictest1001-21mta-sts-daemon21:40:310
1823167993629,4cyclictest1943629-21ssh23:30:012
1823167993629,3cyclictest0-21swapper/223:20:532
1823167993628,5cyclictest1970735-21latency_hist00:15:022
1823167993625,8cyclictest1925558-21sendmail23:00:012
1823167993624,4cyclictest0-21swapper/222:30:472
182316799362,24cyclictest1899517-21ssh22:15:392
182316799362,24cyclictest1899517-21ssh22:15:392
1823166993627,5cyclictest1941900-21mailstats23:25:481
1823165993629,4cyclictest1891244-21kworker/u8:3-rpciod22:26:010
182316799356,20cyclictest665-21snmpd00:05:442
1823167993528,4cyclictest1961871-21latency_hist00:00:032
1823167993524,8cyclictest1945291-21sed23:30:532
182316799352,25cyclictest1875423-21ssh21:35:392
182316799351,30cyclictest1962723-21ssh00:00:422
1823166993529,3cyclictest0-21swapper/122:50:391
1823166993528,5cyclictest421-21dbus-daemon20:05:011
1823166993528,5cyclictest421-21dbus-daemon20:05:011
1823166993525,7cyclictest1869540-21ntp_offset21:25:431
1823166993524,8cyclictest1951129-21timerandwakeup23:40:591
1823165993526,7cyclictest1971688-21needreboot00:15:380
1823165993526,7cyclictest1971688-21needreboot00:15:380
1823165993523,9cyclictest0-21swapper/022:40:290
182316599351,5cyclictest14-21ksoftirqd/000:01:410
1823167993427,4cyclictest1856961-21needreboot21:00:352
1823166993429,3cyclictest0-21swapper/121:15:451
1823166993429,2cyclictest0-21swapper/100:10:011
1823166993427,4cyclictest1866920-21grep21:20:511
1823166993426,5cyclictest1882130-21unixbench_singl21:45:521
1823166993426,5cyclictest1859147-21diskmemload21:50:341
1823166993426,5cyclictest1836646-21grep19:55:011
1823166993426,5cyclictest1836646-21grep19:55:011
1823166993425,6cyclictest1910520-21systemd-run22:35:011
1823166993424,8cyclictest1937576-21munin-run23:20:011
1823166993422,3cyclictest1850669-21sort20:40:341
182316599344,25cyclictest89819-21cupsd22:10:370
1823165993428,3cyclictest0-21swapper/021:10:010
1823165993425,4cyclictest0-21swapper/023:10:140
1823165993425,4cyclictest0-21swapper/023:10:140
1823165993424,7cyclictest1942162-21ls23:25:520
1823165993423,8cyclictest0-21swapper/022:15:390
1823165993423,8cyclictest0-21swapper/022:15:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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