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2026-08-27 - 02:26

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 Thu Aug 27, 2026 00:42:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2249222995443,7cyclictest2309905-21latency_hist21:50:021
2249222995344,4cyclictest0-21swapper/121:51:131
2249223995125,22cyclictest2283763-21kworker/u8:7+xprtiod21:05:012
224922399492,9cyclictest2402628-21ssh00:21:052
224922399492,25cyclictest2339107-21ssh22:36:162
2249223994840,5cyclictest2270278-21systemd-run20:20:012
2249223994737,8cyclictest2389172-21idleruntime-cro00:00:012
2249223994723,2cyclictest0-21swapper/222:41:042
2249223994721,3cyclictest0-21swapper/221:10:012
2249223994719,4cyclictest2256089-21ntp_kernel_pll_19:31:032
2249222994735,8cyclictest2360425-21grep23:11:151
224922399463,14cyclictest2396432-21ssh00:11:002
2249223994626,17cyclictest0-21swapper/221:11:132
2249223994622,2cyclictest0-21swapper/220:40:012
2249223994621,3cyclictest0-21swapper/223:25:022
224922399452,16cyclictest2381202-21awk23:46:032
2249222994436,5cyclictest421-21dbus-daemon19:20:011
2249222994433,8cyclictest2303612-21sshd21:39:481
224922399437,15cyclictest534123-21munin-node21:56:032
224922399433,30cyclictest2353744-21ssh23:01:022
2249223994320,3cyclictest0-21swapper/222:30:592
2249223994320,3cyclictest0-21swapper/222:30:592
2249222994334,6cyclictest2380629-21aten_r2power_po23:45:521
2249221994334,7cyclictest2303680-21ssh21:40:010
2249223994235,3cyclictest0-21swapper/200:01:072
2249223994234,4cyclictest0-21swapper/223:51:082
224922399422,19cyclictest2323324-21ssh22:11:062
2249223994218,5cyclictest0-21swapper/222:21:142
2249223994218,5cyclictest0-21swapper/222:21:142
2249222994234,6cyclictest1-21systemd22:50:011
2249222994233,6cyclictest2395926-21basename00:10:521
2249223994134,4cyclictest2303688-21munin-plugin-st21:40:012
2249223994134,4cyclictest2291390-21cron21:20:002
2249222994133,5cyclictest2319958-21grep22:05:571
2249222994117,15cyclictest421-21dbus-daemon20:51:061
2249222994117,15cyclictest421-21dbus-daemon20:51:061
224922299411,5cyclictest171rcu_preempt20:11:001
2249221994131,7cyclictest2366174-21mailstats23:21:110
2249222994035,3cyclictest0-21swapper/122:30:571
2249222994035,3cyclictest0-21swapper/122:30:571
2249222994032,5cyclictest1-21systemd22:05:011
2249222994031,5cyclictest2340297-21ssh22:40:001
2249222994028,9cyclictest2332607-21mailstats22:26:091
2249222994028,9cyclictest2332607-21mailstats22:26:091
2249221994027,4cyclictest2298228-21aten_r2power_vo21:30:530
2249223993933,3cyclictest2345397-21kworker/u8:4-xprtiod23:34:492
224922299393,29cyclictest2362826-21ssh23:16:031
2249222993931,5cyclictest2300635-21munin-plugin-st21:35:011
2249222993930,5cyclictest1002-21mta-sts-daemon00:06:091
2249222993927,6cyclictest0-21swapper/119:41:141
2249221993933,3cyclictest0-21swapper/019:55:010
2249221993933,3cyclictest0-21swapper/019:55:010
2249221993931,5cyclictest2288832-21aten_r2power_cu21:15:510
2249223993831,4cyclictest0-21swapper/223:06:042
2249222993833,4cyclictest2249220-21cyclictest23:41:101
2249222993831,4cyclictest2328148-21kworker/u8:9+rpciod00:35:011
2249222993828,6cyclictest420-21avahi-daemon21:41:011
224922199383,29cyclictest2356879-21ssh23:06:060
2249221993832,3cyclictest151ktimers/020:41:020
2249221993828,3cyclictest0-21swapper/022:00:010
2249221993824,11cyclictest2295059-21aten_r2power_en21:25:520
2249223993728,6cyclictest2282220-21cron21:00:002
2249223993728,6cyclictest2277750-21munin-plugin-st20:45:012
224922399372,28cyclictest2408713-21ssh00:31:012
2249222993729,5cyclictest2403167-21unixbench_multi00:21:201
2249222993728,6cyclictest420-21avahi-daemon21:59:221
2249222993728,6cyclictest2271779-21systemd-run20:25:011
2249221993729,5cyclictest420-21avahi-daemon19:45:020
2249221993727,6cyclictest12650irq/32-eth023:31:060
2249221993725,9cyclictest1-21systemd00:10:520
2249223993628,4cyclictest0-21swapper/221:26:032
224922299365,25cyclictest2353706-21cron23:01:011
2249222993627,6cyclictest2274755-21systemd-run20:35:011
2249221993622,12cyclictest2369141-21proc_pri23:26:080
2249221993620,12cyclictest12650irq/32-eth000:21:040
2249223993529,3cyclictest0-21swapper/200:40:012
2249222993528,4cyclictest2250682-21kworker/u8:0-xprtiod19:58:011
2249222993527,5cyclictest2325073-21munin-plugin-st22:15:011
2249222993527,5cyclictest2291916-21sh21:20:521
2249222993527,5cyclictest2265762-21munin-plugin-st20:05:001
2249222993526,6cyclictest421-21dbus-daemon22:55:571
2249222993525,3cyclictest0-21swapper/123:23:291
2249222993524,7cyclictest265-21systemd-journal23:26:481
2249222993521,12cyclictest2295940-21sh21:26:111
2249221993527,5cyclictest539-21wpa_supplicant23:41:080
2249221993525,7cyclictest0-21swapper/022:21:030
2249221993525,7cyclictest0-21swapper/022:21:030
2249221993524,8cyclictest2256853-21latency_hist19:35:020
2249221993512,17cyclictest2405613-21ssh00:26:010
224922399345,25cyclictest2344646-21ssh22:46:062
2249223993428,3cyclictest0-21swapper/223:36:082
2249223993428,3cyclictest0-21swapper/221:31:062
224922299344,6cyclictest171rcu_preempt23:51:061
2249222993427,4cyclictest2328110-21latency_hist22:20:031
2249222993427,4cyclictest2328110-21latency_hist22:20:031
2249222993427,4cyclictest1001-21mta-sts-daemon23:36:331
2249222993426,4cyclictest0-21swapper/122:41:041
2249222993425,4cyclictest1003-21mta-sts-daemon23:05:271
224922199345,21cyclictest428-21mta-sts-daemon19:58:030
2249221993428,3cyclictest0-21swapper/020:06:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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