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2026-05-02 - 14:37

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 May 02, 2026 12:43:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
190096996048,8cyclictest265122-21sed10:00:481
190096996048,8cyclictest265122-21sed10:00:481
190097994740,4cyclictest263879-21systemctl10:00:012
190097994535,6cyclictest3572428-21cups-browsed12:05:462
190097994535,6cyclictest3572428-21cups-browsed12:05:462
190097994436,5cyclictest311364-21munin-run11:00:012
190097994436,5cyclictest275747-21systemd-run10:15:012
190095994438,4cyclictest516-21in:imuxsock09:25:010
190095994434,7cyclictest3572428-21cups-browsed09:31:560
190095994431,4cyclictest367890-21fschecks_time12:10:390
190095994336,4cyclictest287663-21latency_hist10:30:020
190095994233,6cyclictest3572428-21cups-browsed11:57:410
190097994132,5cyclictest383137-21latency_hist12:30:022
190096994133,5cyclictest328118-21df11:20:371
190096994132,6cyclictest421-21dbus-daemon11:35:401
190096994132,6cyclictest421-21dbus-daemon11:35:401
190097994032,5cyclictest325234-21unixbench_singl11:15:582
190097994032,5cyclictest252476-21sh09:45:012
190097993931,5cyclictest203589-21systemd-run07:55:012
190097993930,6cyclictest420-21avahi-daemon12:01:222
190097993930,6cyclictest246645-21missed_timers09:35:432
190096993931,5cyclictest242024-21latency_hist09:30:021
190096993931,5cyclictest194584-21cron07:25:001
190096993931,5cyclictest194584-21cron07:25:001
190096993930,6cyclictest439-21systemd-logind11:45:011
190096993929,7cyclictest1051-21mta-sts-daemon12:30:441
190095993934,3cyclictest292387-21grep10:35:400
190095993932,5cyclictest230080-21sh09:15:010
190095993932,4cyclictest347164-21ssh11:45:010
190097993831,4cyclictest299509-21ssh10:45:012
190097993831,4cyclictest299509-21ssh10:45:012
190097993830,5cyclictest303443-21cron10:50:002
190097993830,5cyclictest231637-21mailstats09:15:572
190097993830,5cyclictest1-21systemd11:55:012
190097993827,8cyclictest343177-21grep11:40:012
190097993827,8cyclictest343177-21grep11:40:012
190096993829,5cyclictest368291-21ntp_kernel_pll_12:10:461
190096993827,7cyclictest220094-21true08:50:011
190097993729,5cyclictest1-21systemd09:05:022
190097993729,4cyclictest0-21swapper/211:00:482
190097993728,5cyclictest420-21avahi-daemon10:34:342
190097993728,5cyclictest336957-21timerwakeupswit11:30:592
190097993728,5cyclictest193083-21sendmail07:20:002
190097993629,4cyclictest223065-21munin-run09:00:012
190097993628,5cyclictest3572428-21cups-browsed10:36:462
190097993627,6cyclictest420-21avahi-daemon09:10:012
190097993627,6cyclictest351147-21systemd-run11:50:012
190096993628,5cyclictest287601-21ssh10:30:011
190096993628,5cyclictest1-21systemd11:00:021
190096993627,6cyclictest312315-21if_wlan011:00:401
190096993625,8cyclictest1-21systemd08:55:381
190095993629,4cyclictest256971-21grep09:50:380
190095993628,6cyclictest275745-21sh10:15:010
190097993527,5cyclictest316893-21mailstats11:05:542
190097993527,5cyclictest242531-21aten_r2power_vo09:30:382
190096993529,3cyclictest0-21swapper/112:10:011
190096993529,3cyclictest0-21swapper/112:10:011
190096993526,6cyclictest420-21avahi-daemon09:20:001
190096993526,6cyclictest288740-21needreboot10:30:441
190095993529,4cyclictest375010-21sendmail12:20:010
190095993528,5cyclictest1-21systemd12:25:020
190095993528,4cyclictest3572428-21cups-browsed11:10:530
190095993527,5cyclictest421-21dbus-daemon09:40:240
190095993526,7cyclictest3572428-21cups-browsed10:09:260
190095993526,7cyclictest3572428-21cups-browsed10:09:260
190095993521,11cyclictest214077-21cron08:30:000
190095993521,11cyclictest214077-21cron08:30:000
190097993428,3cyclictest0-21swapper/209:30:012
190097993427,4cyclictest226982-21fschecks_count09:10:442
190097993427,4cyclictest0-21swapper/212:20:002
190097993423,8cyclictest265655-21timerwakeupswit10:01:002
190097993423,8cyclictest265655-21timerwakeupswit10:01:002
190096993425,6cyclictest297198-21timerandwakeup10:40:551
190096993425,6cyclictest297198-21timerandwakeup10:40:551
190096993425,6cyclictest277619-21unixbench_singl10:16:001
190096993421,10cyclictest320431-21missed_timers11:10:411
190095993428,4cyclictest348862-21ssh11:45:580
190095993428,3cyclictest0-21swapper/008:30:460
190095993428,3cyclictest0-21swapper/008:30:460
190095993427,4cyclictest239214-21ntp_kernel_pll_09:25:460
190095993426,5cyclictest3572428-21cups-browsed11:34:450
190095993426,5cyclictest196102-21kworker/u8:607:30:010
190095993424,7cyclictest384868-21head12:30:590
190095993423,9cyclictest222100-21grep08:55:390
190095993423,8cyclictest0-21swapper/009:20:000
190095993422,9cyclictest0-21swapper/012:25:380
190097993327,4cyclictest190094-21cyclictest11:55:482
190097993327,3cyclictest0-21swapper/209:55:002
190097993324,6cyclictest420-21avahi-daemon08:25:542
190097993324,6cyclictest420-21avahi-daemon08:25:542
190096993325,5cyclictest372857-21unixbench_multi12:15:581
190096993325,5cyclictest1-21systemd10:00:011
190096993322,8cyclictest388427-21processes12:35:541
190096993322,8cyclictest234586-21aten_r2power_cu09:20:361
19009699331,24cyclictest246905-21ssh09:35:511
190095993328,2cyclictest0-21swapper/011:40:010
190095993328,2cyclictest0-21swapper/011:40:010
190095993326,4cyclictest263917-21systemd-run10:00:010
190095993326,4cyclictest209183-21systemctl08:10:540
190095993325,5cyclictest3572428-21cups-browsed09:46:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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