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2026-04-11 - 03:29

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 Apr 11, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3384638995851,3cyclictest0-21swapper/123:00:381
3384638995545,6cyclictest3563570-21ssh00:05:011
3384638995444,6cyclictest3387633-21systemctl19:20:011
338463999513,39cyclictest3466890-21ssh22:05:352
3384638995039,7cyclictest1461217-21cups-browsed22:31:471
3384637995020,8cyclictest3548413-21ntpq23:45:340
3384637994942,4cyclictest151ktimers/019:20:310
3384639994738,6cyclictest3559463-21cups-browsed00:34:292
3384638994739,5cyclictest1055-21mta-sts-daemon20:55:341
338463799472,38cyclictest659-21snmpd19:55:380
3384639994635,8cyclictest3531977-21latency23:25:302
338463899465,7cyclictest3420616-21diskmemload23:30:401
3384638994637,6cyclictest421-21dbus-daemon22:45:011
3384637994634,7cyclictest12350irq/32-eth021:55:340
3384637994621,7cyclictest3453180-21ssh21:49:390
3384639994536,3cyclictest0-21swapper/223:30:432
3384639994535,8cyclictest3519839-21missed_timers23:10:302
338463999453,35cyclictest3495599-21sh22:40:392
3384637994536,5cyclictest151ktimers/021:40:330
3384637994533,9cyclictest3571702-21cron00:15:010
3384637994530,10cyclictest3495497-21ssh22:40:350
3384639994431,9cyclictest3506561-21cron22:55:012
3384638994438,3cyclictest0-21swapper/122:25:001
3384638994430,10cyclictest3466626-21latency22:05:291
3384637994437,4cyclictest3504230-21tail22:50:450
3384637994419,7cyclictest3590155-21sh00:36:250
3384639994335,5cyclictest3571745-21ssh00:15:022
3384639994335,5cyclictest3559455-40systemctl00:00:002
3384639994335,5cyclictest3436992-21systemd-run21:30:012
3384639994335,5cyclictest3436992-21systemd-run21:30:012
338463899431,35cyclictest3520107-21rm23:10:401
3384637994332,8cyclictest0-21swapper/000:20:470
3384637994319,8cyclictest3472475-21ssh22:12:210
3384639994234,5cyclictest3567644-21ls00:10:012
3384637994227,10cyclictest3417014-21ntpq20:55:350
3384637994221,18cyclictest3456993-21sh21:54:080
3384637994218,7cyclictest3516559-21/usr/sbin/munin23:05:460
3384637994217,10cyclictest3492889-21sh22:37:240
3384637994216,10cyclictest3425080-21sh21:15:200
3384639994135,3cyclictest0-21swapper/223:45:462
3384639994133,5cyclictest3428791-21systemctl21:20:012
3384639994132,5cyclictest3457465-21cron21:55:002
3384639994131,7cyclictest261-21systemd-journal22:37:522
3384638994132,6cyclictest3441556-21aten_r2power_en21:35:231
3384638994132,6cyclictest3441080-21systemd-run21:35:011
3384638994132,6cyclictest3441080-21systemd-run21:35:011
3384638994131,6cyclictest3510651-21sendmail23:00:001
3384638994131,6cyclictest3510651-21sendmail23:00:001
3384637994134,5cyclictest421-21dbus-daemon21:15:010
3384637994134,4cyclictest3445206-21systemd-run21:40:010
3384637994120,18cyclictest3506876-21sh22:55:120
3384637994120,18cyclictest3506876-21sh22:55:120
3384637994117,7cyclictest3420616-21diskmemload00:10:000
3384637994112,21cyclictest3524083-21ssh23:15:360
3384639994030,7cyclictest420-21avahi-daemon00:19:262
3384638994031,5cyclictest3412151-21fschecks_time20:40:271
3384637994028,7cyclictest3560734-21ntpq00:00:380
3384637994026,8cyclictest3393080-21ntpq19:35:380
3384637994026,8cyclictest3393080-21ntpq19:35:380
3384637994021,8cyclictest3553235-21ssh23:50:540
3384637994020,4cyclictest3385602-21ntpq19:10:390
3384637994019,7cyclictest3420616-21diskmemload00:30:300
3384637994017,9cyclictest3468033-21diskmemload22:06:420
3384637994017,15cyclictest0-21swapper/019:50:350
3384637994015,7cyclictest3420616-21diskmemload21:22:120
3384637994015,7cyclictest3420616-21diskmemload21:22:120
3384637994014,9cyclictest3390041-21ntpq19:25:360
3384639993933,3cyclictest0-21swapper/200:40:012
3384639993930,6cyclictest1461217-21cups-browsed23:09:482
3384639993925,10cyclictest3540030-21kernelversion23:35:292
3384638993931,4cyclictest3410127-21kworker/u8:1-nfsiod22:20:021
3384638993931,4cyclictest3410127-21kworker/u8:1-nfsiod22:20:021
3384638993930,4cyclictest0-21swapper/121:45:421
3384638993928,6cyclictest3398135-21systemd-run19:55:011
3384637993930,6cyclictest3544455-21ntpq23:40:370
3384637993928,7cyclictest3420077-21ntpq21:05:380
3384637993928,7cyclictest3418556-21ntpq21:00:370
3384637993927,8cyclictest3407971-21ntpq20:25:330
3384637993926,8cyclictest3556588-21ntpq23:55:350
3384637993925,10cyclictest3520064-21ntpq23:10:380
3384637993924,13cyclictest3533384-21ssh23:26:460
3384637993923,6cyclictest3477080-21ssh22:18:210
3384637993923,6cyclictest3477080-21ssh22:18:210
3384637993923,13cyclictest3485782-21ssh22:29:210
3384637993920,16cyclictest3488362-21sh22:31:310
3384637993919,6cyclictest3572960-21ntpq00:15:370
3384637993917,11cyclictest3538473-21sh23:33:480
3384637993916,7cyclictest3502074-21sh22:49:150
3384637993915,7cyclictest3420616-21diskmemload23:36:080
3384639993831,3cyclictest0-21swapper/222:10:452
3384639993830,5cyclictest3405535-21sed20:15:452
3384639993827,7cyclictest3486133-21cron22:30:002
3384639993824,10cyclictest421-21dbus-daemon23:50:092
3384638993830,5cyclictest3535097-21ssh23:30:011
3384638993828,7cyclictest3585717-21unixbench_singl00:30:441
3384638993827,7cyclictest261-21systemd-journal22:02:521
338463899381,30cyclictest3540239-21ssh23:35:321
3384637993828,7cyclictest3401142-21sh20:05:010
3384637993826,8cyclictest3410958-21ntpq20:35:310
3384637993825,8cyclictest3479274-21ntpq22:20:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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