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2026-04-19 - 15:30

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 Sun Apr 19, 2026 12:43:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3890919996549,8cyclictest0-21swapper/109:15:451
3890920995738,16cyclictest421-21dbus-daemon11:40:012
3890920995346,3cyclictest0-21swapper/211:00:402
3890918995338,10cyclictest0-21swapper/011:25:010
3890920995141,6cyclictest420-21avahi-daemon08:40:312
3890920995126,22cyclictest3076692-21cups-browsed08:10:462
3890920995126,22cyclictest3076692-21cups-browsed08:10:462
3890920995023,23cyclictest3076692-21cups-browsed09:40:302
3890918994836,9cyclictest421-21dbus-daemon12:00:000
3890918994834,10cyclictest0-21swapper/009:30:460
3890918994834,10cyclictest0-21swapper/009:30:460
3890920994740,4cyclictest4093090-21munin-plugin-st12:35:012
3890920994738,5cyclictest4036396-21systemd-run11:25:012
3890920994737,7cyclictest0-21swapper/209:10:002
3890919994739,5cyclictest4003969-21systemd-run10:45:011
3890920994623,20cyclictest0-21swapper/210:05:462
3890919994638,5cyclictest3904407-21systemd-run07:55:011
3890918994637,6cyclictest3997117-21ssh10:35:430
3890920994538,3cyclictest0-21swapper/209:55:442
389092099452,7cyclictest3902392-21ntpq07:45:442
389091999454,35cyclictest4053812-21ssh11:45:391
3890919994533,8cyclictest3076692-21cups-browsed11:04:531
3890918994529,13cyclictest3076692-21cups-browsed11:35:300
3890918994529,11cyclictest0-21swapper/009:10:000
389092099442,6cyclictest3896335-21ntpq07:25:392
3890920994416,24cyclictest3911936-21systemd-run08:20:012
3890920994416,24cyclictest3911936-21systemd-run08:20:012
3890919994436,5cyclictest3951378-21munin-plugin-st09:40:001
389092099436,13cyclictest4074921-21sshd12:11:112
389092099433,6cyclictest3891781-21ntpq07:10:382
389092099432,6cyclictest3906833-21ntpq08:00:402
3890920994323,17cyclictest4072860-21latency_hist12:10:022
389092099431,15cyclictest4040431-21awk11:30:012
3890919994333,6cyclictest1054-21mta-sts-daemon12:00:391
3890919994333,5cyclictest0-21swapper/112:20:011
3890919994332,7cyclictest0-21swapper/110:10:401
3890918994333,5cyclictest0-21swapper/010:55:440
389092099428,30cyclictest3931246-21ssh09:15:082
3890920994233,6cyclictest4024198-21systemd-run11:10:022
3890920994233,6cyclictest4024198-21systemd-run11:10:022
3890920994232,6cyclictest4062486-21unixbench_multi11:55:512
3890920994224,14cyclictest0-21swapper/210:50:292
389092099422,15cyclictest4001082-21ntpq10:40:382
3890920994216,23cyclictest4044466-21latency_hist11:35:022
3890920994215,22cyclictest3988245-21/usr/sbin/munin10:25:522
3890920994215,22cyclictest3988245-21/usr/sbin/munin10:25:522
389092099421,15cyclictest4005124-21ssh10:45:382
3890919994231,6cyclictest0-21swapper/111:40:401
3890918994232,4cyclictest0-21swapper/009:25:420
389092099417,31cyclictest3930907-21ssh09:14:552
389092099413,8cyclictest3894798-21ntpq07:20:372
389092099413,6cyclictest4094263-21ntpq12:35:392
389092099412,7cyclictest3924872-21ntpq09:00:442
389092099412,5cyclictest3980902-21ntpq10:15:402
389092099412,3cyclictest3956828-21ntpq09:45:502
389092099412,17cyclictest4053858-21ssh11:45:412
389092099412,16cyclictest4013201-21ntpq10:55:362
389092099411,5cyclictest3920365-21ntpq08:45:442
389092099411,18cyclictest3977036-21ps10:10:452
389092099411,11cyclictest3938532-21ssh09:23:532
3890919994133,4cyclictest0-21swapper/110:05:381
3890919994131,7cyclictest3983753-21grep10:20:011
3890918994132,6cyclictest3076692-21cups-browsed11:15:310
3890918994127,11cyclictest4017898-21unixbench_multi11:00:510
3890918994123,12cyclictest12350irq/32-eth010:20:440
389091899412,29cyclictest4001091-21ssh10:40:380
389092099409,28cyclictest4028163-21ssh11:14:572
389092099409,28cyclictest4028163-21ssh11:14:572
389092099408,30cyclictest3999751-21ssh10:39:472
389092099404,9cyclictest421-21dbus-daemon11:40:052
389092099403,9cyclictest3076692-21cups-browsed09:25:382
3890920994031,5cyclictest3948053-21fschecks_count09:35:312
389092099402,4cyclictest3960694-21ntpq09:50:402
3890920994021,16cyclictest3076692-21cups-browsed10:00:302
389092099401,9cyclictest3899349-21ntpq07:35:442
389092099401,5cyclictest3917236-21ntpq08:35:372
389092099401,5cyclictest3897763-21ntpq07:30:362
389092099401,10cyclictest4087211-21ssh12:26:292
389092099401,10cyclictest4079921-21ssh12:18:012
389092099401,10cyclictest3993268-21ssh10:30:472
389092099401,10cyclictest3914283-21ntpq08:25:422
3890919994031,6cyclictest421-21dbus-daemon09:45:011
3890919994028,9cyclictest4062386-21timerwakeupswit11:55:511
3890919994028,8cyclictest3917886-21cut08:40:011
3890918994032,5cyclictest4028242-21latency_hist11:15:010
3890918994032,5cyclictest4028242-21latency_hist11:15:010
3890918994029,8cyclictest12350irq/32-eth010:10:370
389092099393,6cyclictest3900763-21ntpq07:40:382
389092099392,5cyclictest3912759-21ntpq08:20:372
389092099391,9cyclictest3984041-21ssh10:20:072
389092099391,9cyclictest3903772-21ntpq07:50:412
389092099391,5cyclictest4066011-21ntpq12:00:422
389092099391,5cyclictest3923359-21ntpq08:55:432
389092099391,4cyclictest3908249-21ntpq08:05:382
389092099391,3cyclictest4029535-21ntpq11:15:442
389092099391,13cyclictest4082341-21ntpq12:20:452
3890919993931,4cyclictest0-21swapper/112:30:321
389091899393,31cyclictest3952642-21ssh09:40:390
3890918993932,4cyclictest4072942-21latency_hist12:10:020
389091899392,20cyclictest659-21snmpd09:55:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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