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2026-07-25 - 21:14

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 Sat Jul 25, 2026 12:43:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
216373994941,5cyclictest235928-21systemd-run08:15:011
216374994637,6cyclictest421-21dbus-daemon09:45:012
216373994538,4cyclictest306902-21awk10:40:001
216372994438,4cyclictest223932-21systemd-run07:35:020
216374994334,5cyclictest216394-21latency_hist07:10:012
216373994233,5cyclictest262380-21kernelversion09:25:421
216373994233,5cyclictest237953-21fschecks_time08:20:401
216373994232,7cyclictest291834-21ssh10:15:021
216374994132,5cyclictest321990-21cron11:05:012
216373994029,7cyclictest421-21dbus-daemon10:06:141
216372994033,4cyclictest359745-21timerwakeupswit12:06:010
216372994033,4cyclictest249439-21systemd-run09:00:020
216372994031,6cyclictest235930-21systemd08:15:020
216374993932,4cyclictest694-21cron11:00:012
216374993930,6cyclictest294818-21cut10:20:012
216374993828,6cyclictest3613316-21cups-browsed11:09:472
216372993831,4cyclictest284466-21unixbench_singl10:01:010
216372993831,4cyclictest252435-21systemd-run09:10:020
216372993830,5cyclictest313050-21latency_hist10:50:020
216372993828,4cyclictest320624-21ssh11:01:010
216374993731,3cyclictest0-21swapper/209:50:012
216374993729,5cyclictest370377-21latency_hist12:25:032
216374993729,5cyclictest302583-21sed10:31:002
216374993729,5cyclictest302583-21sed10:31:002
216374993729,4cyclictest0-21swapper/212:05:572
216374993628,5cyclictest0-21swapper/210:00:012
216374993626,7cyclictest337445-21/usr/sbin/munin11:30:412
216374993626,7cyclictest337445-21/usr/sbin/munin11:30:412
216374993625,7cyclictest3613316-21cups-browsed09:12:162
216373993630,3cyclictest0-21swapper/110:20:011
216373993629,4cyclictest1001-21mta-sts-daemon12:21:271
216373993628,5cyclictest332379-21mailstats11:20:531
216373993628,5cyclictest332379-21mailstats11:20:531
216373993628,5cyclictest331185-21latency_hist11:20:031
216373993628,5cyclictest320616-21unixbench-2d11:01:011
216373993628,5cyclictest249325-21unixbench_singl08:55:581
216373993628,4cyclictest0-21swapper/111:49:521
216373993627,7cyclictest364230-21systemd12:15:021
21637399361,31cyclictest420-21avahi-daemon09:41:171
216372993627,6cyclictest421-21dbus-daemon10:37:590
216373993528,4cyclictest373271-21cron12:30:011
216373993528,4cyclictest256970-21timerandwakeup09:15:591
216373993528,4cyclictest256970-21timerandwakeup09:15:591
216373993526,6cyclictest218380-21fschecks_time07:15:381
216373993526,6cyclictest218380-21fschecks_time07:15:381
216372993530,2cyclictest0-21swapper/010:20:010
216372993529,4cyclictest247920-21systemd-run08:55:010
216372993528,4cyclictest0-21swapper/009:35:470
216372993527,5cyclictest421-21dbus-daemon08:50:010
216372993526,6cyclictest420-21avahi-daemon11:47:020
216374993427,4cyclictest344523-21swap11:40:592
216374993427,3cyclictest0-21swapper/210:10:502
216374993426,5cyclictest1-21systemd07:30:012
216374993425,4cyclictest0-21swapper/209:35:522
216374993421,9cyclictest284092-21mailstats10:00:572
216373993428,3cyclictest0-21swapper/110:30:531
216373993428,3cyclictest0-21swapper/110:30:531
216373993427,4cyclictest341749-21grep11:36:001
216373993424,7cyclictest3613316-21cups-browsed09:13:001
216373993424,7cyclictest337940-21latency11:30:431
216373993424,7cyclictest337940-21latency11:30:431
216372993428,4cyclictest371750-21threads12:25:580
216372993426,6cyclictest307625-21fschecks_count10:40:410
216372993426,5cyclictest276728-21pluginstate09:50:020
216372993425,6cyclictest421-21dbus-daemon09:53:350
216372993421,4cyclictest350797-21unixbench_multi11:51:000
216372993415,15cyclictest421-21dbus-daemon11:36:130
216374993326,4cyclictest258486-21idleruntime-cro09:20:012
216374993326,4cyclictest258486-21idleruntime-cro09:20:012
216374993325,5cyclictest355950-21if_eth012:00:402
216374993324,6cyclictest420-21avahi-daemon11:29:482
216374993324,6cyclictest420-21avahi-daemon11:29:482
216374993324,6cyclictest420-21avahi-daemon07:35:022
216374993323,7cyclictest231116-21timerandwakeup07:55:572
216373993327,3cyclictest1000-21mta-sts-daemon11:12:471
216373993323,7cyclictest244700-21timerwakeupswit08:41:041
216372993326,4cyclictest376411-21latency_hist12:35:020
216372993325,5cyclictest1002-21mta-sts-daemon11:25:510
216372993325,5cyclictest1002-21mta-sts-daemon11:25:510
216372993324,6cyclictest3613316-21cups-browsed11:16:250
21637499327,22cyclictest351ktimers/211:45:472
216374993225,4cyclictest373213-21sshd12:29:522
216374993224,5cyclictest326346-21mailstats11:10:572
216374993224,5cyclictest306918-21sendmail10:40:012
216374993224,5cyclictest235905-21munin-plugin-st08:15:012
216374993223,6cyclictest309916-21cron10:45:002
216374993223,5cyclictest242426-21fschecks_count08:35:402
216373993227,2cyclictest0-21swapper/111:00:011
216373993226,3cyclictest0-21swapper/112:30:591
216373993226,3cyclictest0-21swapper/110:51:021
216373993226,3cyclictest0-21swapper/110:25:481
216373993226,3cyclictest0-21swapper/109:56:021
216373993224,5cyclictest237409-21munin-plugin-st08:20:011
216373993223,6cyclictest420-21avahi-daemon12:38:161
216373993223,6cyclictest3613316-21cups-browsed11:27:361
216373993223,6cyclictest3613316-21cups-browsed11:27:361
216373993222,6cyclictest420-21avahi-daemon11:06:291
216372993227,3cyclictest260203-21unixbench_singl09:20:590
216372993227,3cyclictest260203-21unixbench_singl09:20:590
216372993226,4cyclictest332549-21ssh11:20:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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