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2026-07-21 - 21:26

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 Tue Jul 21, 2026 12:43:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
108046099544,37cyclictest1207532-21ssh11:40:472
1080459995431,20cyclictest1221365-21munin-plugin-st12:05:001
1080459995037,7cyclictest0-21swapper/111:00:491
108046099495,33cyclictest1213561-21ssh11:50:492
1080459994939,6cyclictest1173581-21systemd-run10:45:011
1080459994922,23cyclictest1-21systemd12:35:341
1080459994622,4cyclictest1134597-21/usr/sbin/munin09:40:011
1080460994538,4cyclictest1119515-21kworker/u8:6+xprtiod10:15:422
1080460994538,4cyclictest1119515-21kworker/u8:6+xprtiod10:15:422
1080459994539,3cyclictest0-21swapper/111:50:401
1080459994521,4cyclictest1218346-21sendmail12:00:011
1080459994521,4cyclictest1218346-21sendmail12:00:011
1080459994517,5cyclictest421-21dbus-daemon08:15:021
1080459994517,5cyclictest1089481-21systemd-run07:40:011
1080458994537,5cyclictest485-21in:imuxsock09:55:010
1080460994436,5cyclictest485-21in:imuxsock08:35:402
1080460994430,10cyclictest439-21systemd-logind07:45:022
108045999441,37cyclictest1228532-21ssh12:15:491
1080458994436,5cyclictest420-21avahi-daemon09:43:250
1080460994335,5cyclictest1123581-21needreboot09:20:422
108045999435,11cyclictest1198664-21ssh11:25:531
1080459994317,6cyclictest0-21swapper/109:25:471
108045999423,28cyclictest1165784-21ssh10:30:501
1080459994221,2cyclictest0-21swapper/110:20:511
1080459994221,2cyclictest0-21swapper/110:20:511
1080458994235,5cyclictest1219135-21sshd12:00:390
1080458994233,6cyclictest1094089-21latency_hist07:55:020
108045899423,31cyclictest1147682-21ssh10:00:440
1080460994132,6cyclictest421-21dbus-daemon11:40:022
1080460994132,6cyclictest1159942-21mailstats10:20:512
1080460994132,6cyclictest1159942-21mailstats10:20:512
1080460994132,5cyclictest1147946-21mailstats10:00:522
1080459994133,5cyclictest1150785-21ssh10:05:481
1080459994123,2cyclictest0-21swapper/109:45:011
1080459994120,3cyclictest1002-21mta-sts-daemon07:40:421
1080459994120,3cyclictest1001-21mta-sts-daemon11:14:401
108045899413,32cyclictest1204655-21ssh11:35:570
1080458994131,4cyclictest1102948-21cron08:25:010
1080459994031,6cyclictest1141622-21needreboot09:50:421
1080459994031,5cyclictest1116447-21diskmemload10:00:521
108045999401,28cyclictest1201552-21ssh11:30:461
1080458994033,4cyclictest1211111-21head11:46:020
1080458994032,5cyclictest420-21avahi-daemon09:14:040
1080460993932,3cyclictest1110438-21kworker/u8:2+nfsiod08:55:012
1080460993932,3cyclictest0-21swapper/210:05:522
1080460993931,5cyclictest1-21systemd09:00:012
1080460993931,5cyclictest1081956-21systemd-run07:15:012
108045999393,29cyclictest1144797-21ssh09:55:501
1080458993933,4cyclictest1194494-21idleruntime-cro11:20:010
108045899392,16cyclictest1231428-21modprobe12:20:430
1080460993829,6cyclictest1182539-21sendmail11:00:012
1080460993828,6cyclictest485-21in:imuxsock07:55:012
108046099382,29cyclictest1231435-21ssh12:20:432
108045999381,31cyclictest665-21snmpd10:55:411
1080458993832,2cyclictest0-21swapper/007:15:010
1080458993827,8cyclictest1089432-21idleruntime-cro07:40:010
1080458993826,9cyclictest277787-21cups-browsed12:19:320
1080458993820,15cyclictest1104976-21fschecks_time08:30:390
1080460993729,5cyclictest1177812-21rm10:50:512
1080460993729,5cyclictest1132317-21gltestperf09:35:362
108046099371,29cyclictest1116447-21diskmemload10:25:442
1080458993730,4cyclictest1184266-21sed11:01:000
1080458993729,5cyclictest1003-21mta-sts-daemon12:36:530
1080458993725,9cyclictest1003-21mta-sts-daemon10:20:430
1080458993725,9cyclictest1003-21mta-sts-daemon10:20:430
1080458993725,10cyclictest12650irq/32-eth011:05:520
1080460993628,5cyclictest1095446-21basename08:00:002
1080460993628,5cyclictest1095446-21basename08:00:002
1080460993625,7cyclictest1-21systemd09:30:012
1080459993628,5cyclictest1140640-21systemd-run09:50:011
1080459993625,8cyclictest1087944-21munin-plugin-st07:35:011
1080459993618,14cyclictest441-21thd09:15:521
1080458993630,4cyclictest1113306-21tail08:55:560
1080458993627,6cyclictest421-21dbus-daemon09:46:210
108045899362,26cyclictest1216487-21ssh11:55:470
108045899362,26cyclictest1216487-21ssh11:55:470
1080458993620,11cyclictest421-21dbus-daemon09:35:430
1080458993616,14cyclictest12650irq/32-eth010:55:500
1080460993528,4cyclictest1188513-21ls11:10:012
1080460993528,4cyclictest1176546-21grep10:50:012
1080459993528,4cyclictest1095971-21fschecks_count08:00:381
1080459993526,6cyclictest1129044-21aten_r2power_en09:30:341
1080459993525,6cyclictest1207072-21/usr/sbin/munin11:40:381
1080458993529,3cyclictest0-21swapper/010:30:460
1080458993529,2cyclictest0-21swapper/012:25:520
1080458993528,5cyclictest277787-21cups-browsed09:01:030
1080458993528,5cyclictest277787-21cups-browsed09:01:030
1080458993527,5cyclictest1-21systemd10:00:020
1080460993426,5cyclictest277787-21cups-browsed08:07:162
1080460993425,7cyclictest1087251-21needreboot07:30:432
1080460993425,5cyclictest1230344-21munin-run12:20:012
1080459993424,6cyclictest1174553-21needreboot10:45:391
1080458993427,4cyclictest1200638-21latency_hist11:30:030
1080458993427,4cyclictest1122545-21cron09:20:010
1080460993328,2cyclictest0-21swapper/208:00:402
1080460993327,3cyclictest0-21swapper/212:10:012
1080460993327,3cyclictest0-21swapper/210:10:432
1080460993322,8cyclictest1138880-21/usr/sbin/munin09:45:522
1080459993326,3cyclictest1234243-21kworker/u8:7-rpciod12:30:011
1080459993324,5cyclictest1-21systemd07:15:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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