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2026-07-18 - 15:48

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 18, 2026 12:43:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
383187299566,38cyclictest3965737-21ssh11:50:432
3831870995326,20cyclictest12650irq/32-eth010:10:470
3831870994940,7cyclictest3858810-21kworker/u8:0+xprtiod09:00:010
3831870994637,5cyclictest3886273-21latency_hist09:40:020
3831870994637,5cyclictest3886273-21latency_hist09:40:020
383187099452,34cyclictest3962861-21grep11:45:500
3831870994523,15cyclictest151ktimers/007:25:460
3831871994436,5cyclictest3872566-21grep09:15:591
3831871994434,7cyclictest3921045-21grep10:35:581
3831871994434,7cyclictest3898141-21sh10:00:011
3831870994419,16cyclictest151ktimers/009:25:460
3831872994334,6cyclictest3913671-21/usr/sbin/munin10:25:372
3831872994334,6cyclictest3913671-21/usr/sbin/munin10:25:372
3831872994333,7cyclictest421-21dbus-daemon09:31:402
3831872994233,5cyclictest3941722-21grep11:10:512
3831872994233,5cyclictest3875539-21unixbench-2d09:20:562
3831872994231,7cyclictest1001-21mta-sts-daemon12:34:432
3831872994231,7cyclictest1001-21mta-sts-daemon12:34:432
3831870994220,15cyclictest12650irq/32-eth011:35:420
3831870994220,15cyclictest12650irq/32-eth011:35:420
3831872994134,4cyclictest3864817-21sh09:00:012
3831872994133,5cyclictest3946469-21munin-plugin-st11:20:012
3831872994132,6cyclictest420-21avahi-daemon09:30:012
3831871994134,3cyclictest0-21swapper/112:20:011
3831871994132,6cyclictest1003-21mta-sts-daemon12:01:301
383187099414,30cyclictest3983908-21ssh12:20:440
3831870994132,6cyclictest3959288-21gltestperf11:40:370
3831872994034,3cyclictest0-21swapper/212:05:012
3831872994032,5cyclictest3033423-21cups-browsed12:10:022
3831872994030,7cyclictest420-21avahi-daemon09:19:222
3831870994032,5cyclictest427-21polkitd12:00:010
3831870994032,5cyclictest3946471-21awk11:20:010
3831870994032,5cyclictest0-21swapper/008:50:440
3831870994031,6cyclictest3860363-21systemd-run08:45:010
3831872993931,5cyclictest3887757-21tail09:40:572
3831872993926,10cyclictest3983718-21latency12:20:392
3831871993931,5cyclictest3874613-21fschecks_time09:20:361
3831871993930,6cyclictest420-21avahi-daemon10:06:221
3831871993929,6cyclictest421-21dbus-daemon11:20:011
3831871993925,8cyclictest3935576-21sh11:00:461
3831870993927,8cyclictest3033423-21cups-browsed12:00:300
3831870993920,15cyclictest12650irq/32-eth010:50:510
3831872993830,5cyclictest3982835-21systemd-run12:20:012
3831871993830,5cyclictest3988842-21cron12:30:011
3831871993829,5cyclictest3990116-21processes12:30:491
3831871993829,5cyclictest3990116-21processes12:30:491
383187199382,28cyclictest3905283-21ssh10:10:431
3831870993827,5cyclictest0-21swapper/010:05:430
3831872993730,4cyclictest0-21swapper/210:10:012
3831872993727,7cyclictest3033423-21cups-browsed09:10:342
383187299371,31cyclictest3911348-21sh10:20:422
383187299371,31cyclictest3911348-21sh10:20:422
3831871993728,5cyclictest3961609-21systemd-run11:45:011
3831871993727,6cyclictest3033419-21cupsd10:55:121
3831870993729,5cyclictest485-21in:imuxsock08:00:010
3831870993724,10cyclictest3991859-21cron12:35:010
3831870993724,10cyclictest3991859-21cron12:35:010
3831870993710,21cyclictest665-21snmpd08:20:440
3831872993629,4cyclictest3934408-21sendmail11:00:012
3831872993629,4cyclictest3845340-21sh07:55:012
3831872993628,5cyclictest3910254-21grep10:20:012
3831872993627,6cyclictest265-21systemd-journal07:20:002
3831872993626,7cyclictest3033423-21cups-browsed10:48:572
3831871993629,4cyclictest3929068-21fschecks_count10:50:371
3831871993626,6cyclictest1-21systemd12:20:511
3831871993624,9cyclictest3968690-21needreboot11:55:401
3831870993626,7cyclictest3873933-21systemd-run09:20:010
3831870993623,9cyclictest0-21swapper/010:55:450
3831870993620,11cyclictest151ktimers/007:15:400
3831872993527,5cyclictest3865174-21aten_r2power_fr09:00:342
3831872993527,5cyclictest3852860-21sendmail08:20:002
3831872993527,5cyclictest3852860-21sendmail08:20:002
3831872993527,4cyclictest1000-21mta-sts-daemon08:05:482
3831872993527,4cyclictest1000-21mta-sts-daemon08:05:482
3831872993526,7cyclictest3988852-21grep12:30:012
3831872993526,5cyclictest0-21swapper/210:35:482
383187199353,24cyclictest3923630-21ssh10:40:501
3831871993528,4cyclictest3936198-21kworker/u8:2-rpciod11:10:331
3831871993527,5cyclictest3895120-21ssh09:55:011
3831871993526,7cyclictest3846835-21/usr/sbin/munin08:00:021
3831871993526,6cyclictest3965148-21aten_r2power_fr11:50:321
383187099353,27cyclictest3992953-21sh12:35:430
3831870993528,4cyclictest3840976-21latency_hist07:40:020
3831870993516,17cyclictest14-21ksoftirqd/011:30:490
3831870993516,17cyclictest14-21ksoftirqd/011:30:490
3831871993428,3cyclictest0-21swapper/108:40:011
3831871993427,3cyclictest0-21swapper/111:30:441
3831871993427,3cyclictest0-21swapper/111:30:441
3831871993426,5cyclictest3964817-21latency_hist11:50:021
3831871993426,5cyclictest1002-21mta-sts-daemon09:31:511
383187099346,22cyclictest3887178-21sshd09:40:440
383187099343,12cyclictest3893204-21ssh09:50:420
3831870993425,6cyclictest0-21swapper/008:10:460
3831870993425,6cyclictest0-21swapper/008:10:460
3831870993425,5cyclictest0-21swapper/009:50:010
3831870993425,4cyclictest0-21swapper/011:51:310
383187099342,26cyclictest3896250-21ssh09:55:450
383187099342,26cyclictest12650irq/32-eth012:25:480
383187099342,24cyclictest265-21systemd-journal10:35:440
3831872993328,2cyclictest0-21swapper/210:05:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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