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2026-09-29 - 00:36

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 Mon Sep 28, 2026 12:42:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3418586996860,5cyclictest3535053-21ssh11:21:200
3418586996756,8cyclictest3540470-21aten_r2power_en11:31:100
3418586996454,7cyclictest3503004-40mandb10:29:140
341858799534,8cyclictest171rcu_preempt10:49:461
3418586995244,5cyclictest3529346-21awk11:11:330
3418586995033,14cyclictest3445610-21latency_hist08:40:010
3418588994840,5cyclictest3530672-21ssh11:15:012
341858699482,33cyclictest3458908-21sh09:16:240
3418587994738,5cyclictest3421581-21idleruntime-cro07:20:011
3418586994742,3cyclictest0-21swapper/009:31:160
3418586994738,6cyclictest2633219-21cups-browsed09:51:090
3418588994635,8cyclictest3549021-21latency_hist11:45:022
3418587994639,4cyclictest3524679-21systemd-run11:05:011
3418587994637,6cyclictest3456337-21timerwakeupswit09:11:311
3418588994537,5cyclictest3503004-40mandb10:29:062
3418587994514,26cyclictest271ktimers/110:21:221
3418586994537,5cyclictest3424690-21latency_hist07:30:020
341858899442,31cyclictest3553220-21ssh11:51:162
3418587994436,5cyclictest3509388-21cron10:40:011
3418586994435,6cyclictest420-21avahi-daemon09:36:260
3418586994435,6cyclictest420-21avahi-daemon09:10:580
3418586994432,9cyclictest3516656-21missed_timers10:51:140
3418586994432,9cyclictest3516656-21missed_timers10:51:140
3418586994431,8cyclictest12650irq/32-eth009:21:210
3418586994429,4cyclictest0-21swapper/010:56:120
3418588994335,5cyclictest3472891-21munin-run09:40:012
3418588994335,5cyclictest3448589-21systemd-run08:50:022
3418586994325,14cyclictest3582380-21cron12:40:010
3418586994324,14cyclictest3483286-21ssh09:56:180
3418588994234,5cyclictest3491165-21systemd-run10:10:012
3418587994233,6cyclictest3471760-21vmstat09:36:321
3418587994233,6cyclictest3438087-21systemd-run08:15:011
3418587994232,6cyclictest3555034-21grep11:55:011
3418586994235,4cyclictest1001-21mta-sts-daemon12:16:190
3418586994235,4cyclictest1001-21mta-sts-daemon12:16:190
3418586994235,3cyclictest0-21swapper/012:21:220
3418586994217,3cyclictest171rcu_preempt10:01:210
3418588994133,5cyclictest3465592-21head09:26:312
3418586994134,3cyclictest0-21swapper/012:00:010
3418586994123,10cyclictest12650irq/32-eth010:31:180
341858699411,20cyclictest428-21mta-sts-daemon12:06:230
3418588994032,5cyclictest421-21dbus-daemon12:15:022
3418588994032,5cyclictest421-21dbus-daemon12:15:022
3418587994033,4cyclictest3545894-21sendmail11:40:011
3418587994030,6cyclictest3567822-21aten_r2power_cu12:16:081
3418587994030,6cyclictest3567822-21aten_r2power_cu12:16:081
3418586994033,4cyclictest3533861-21latency_hist11:20:020
3418586994032,5cyclictest3544778-21vmstat11:36:310
3418588993927,8cyclictest0-21swapper/210:05:012
3418587993930,6cyclictest3572175-21unixbench_singl12:21:321
3418586993933,4cyclictest3439567-21grep08:20:010
3418586993931,5cyclictest3522233-21aten_r2power_cu11:01:070
3418586993928,8cyclictest3451685-21latency_hist09:00:020
3418586993922,9cyclictest3577555-21sh12:31:180
3418587993830,4cyclictest0-21swapper/111:21:201
3418587993829,7cyclictest3538058-21ntp_kernel_pll_11:26:201
3418587993829,7cyclictest3538058-21ntp_kernel_pll_11:26:201
3418588993730,4cyclictest3494184-21cron10:15:012
3418588993729,5cyclictest3427592-21sendmail07:40:012
3418587993729,5cyclictest3581231-21head12:36:321
3418586993729,6cyclictest3511285-21grep10:41:310
3418586993722,8cyclictest4192055-21systemd-journal08:41:180
3418588993628,5cyclictest3545893-21sh11:40:002
3418588993626,7cyclictest3558976-21fschecks_time12:01:122
3418588993625,8cyclictest3524677-21idleruntime-cro11:05:012
3418587993629,4cyclictest3497233-21grep10:20:011
3418587993628,5cyclictest3531951-21sshd11:16:181
3418587993628,5cyclictest3530710-21systemd-run11:15:011
341858799361,5cyclictest171rcu_preempt07:31:231
3418586993628,6cyclictest3442585-21sh08:30:010
3418586993628,4cyclictest0-21swapper/011:06:240
341858699362,25cyclictest3513752-21ssh10:46:200
3418588993530,2cyclictest0-21swapper/211:20:012
3418588993527,5cyclictest3574195-21fschecks_count12:26:162
3418588993527,5cyclictest3558067-21sendmail12:00:012
3418588993527,5cyclictest3507546-21needreboot10:36:172
3418587993530,2cyclictest0-21swapper/111:35:001
3418587993528,4cyclictest3448269-21switchtime08:46:301
3418587993527,5cyclictest3441443-21aten_r2power_po08:26:081
3418587993526,5cyclictest3525552-21rm11:06:151
3418587993524,8cyclictest3459108-21processes09:16:301
3418587993514,9cyclictest2633219-21cups-browsed10:59:301
3418586993529,4cyclictest3497232-21munin-run10:20:010
3418586993529,4cyclictest3464589-21fschecks_count09:26:110
3418586993529,3cyclictest3419427-21sshd07:11:180
3418586993528,4cyclictest0-21swapper/010:21:180
3418586993522,6cyclictest0-21swapper/007:46:170
3418588993429,2cyclictest0-21swapper/208:40:002
3418588993428,3cyclictest0-21swapper/209:35:022
3418588993427,4cyclictest1001-21mta-sts-daemon09:23:592
3418588993425,6cyclictest2633219-21cups-browsed08:21:102
3418588993425,4cyclictest0-21swapper/209:46:292
3418588993424,7cyclictest3572190-21uptime12:21:322
3418587993428,4cyclictest3418585-21cyclictest10:31:191
3418587993428,3cyclictest0-21swapper/109:45:021
3418587993428,3cyclictest0-21swapper/109:10:011
3418587993427,3cyclictest0-21swapper/110:41:221
3418587993426,5cyclictest3427571-21munin-plugin-st07:40:011
3418587993425,6cyclictest1003-21mta-sts-daemon09:25:011
3418587993424,7cyclictest3501346-21latency10:26:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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