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2025-09-17 - 15:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6s.osadl.org (updated Wed Sep 17, 2025 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
327447999653,44cyclictest22-21rcuc/107:45:001
3274480996311,21cyclictest3289154-21kworker/u8:3-ext4-rsv-conversion09:50:012
327447699624,3cyclictest0-21swapper/011:50:010
327448099611,40cyclictest0-21swapper/211:20:012
327448099611,40cyclictest0-21swapper/211:20:012
327447999614,23cyclictest931-21dropbear10:45:011
327447999596,21cyclictest22-21rcuc/112:00:011
327448099572,28cyclictest0-21swapper/212:10:012
327448099572,28cyclictest0-21swapper/212:10:012
327448099571,25cyclictest0-21swapper/210:10:012
327448099571,25cyclictest0-21swapper/210:10:012
3274479995750,5cyclictest22-21rcuc/112:20:011
327448099541,29cyclictest0-21swapper/209:40:012
3274480995337,11cyclictest0-21swapper/212:30:012
3274479995335,16cyclictest231ktimers/111:45:011
3274479995334,13cyclictest0-21swapper/108:15:001
327448099521,33cyclictest0-21swapper/209:35:012
327447699521,43cyclictest0-21swapper/009:15:120
3274480995139,6cyclictest3313861-21munin-plugin-st11:00:002
3274476995143,5cyclictest0-21swapper/007:45:160
327448099501,27cyclictest0-21swapper/211:45:012
3274476995040,6cyclictest293-21systemd-journal08:45:010
327447699501,39cyclictest0-21swapper/007:20:200
3274480994943,3cyclictest3301102-21munin-plugin-st09:45:012
3274479994940,6cyclictest3282326-21munin-plugin-st07:55:011
327447699499,15cyclictest3329342-21cat12:30:000
3274480994833,10cyclictest0-21swapper/211:05:322
3274479994834,9cyclictest3299292-21unixbench_multi09:30:301
327447699484,6cyclictest3318088-21apt-get11:25:010
3274479994741,3cyclictest231ktimers/109:05:011
3274476994739,6cyclictest3319022-21munin-plugin-st11:30:000
3274476994739,4cyclictest3298562-21munin-plugin-st09:30:010
3274476994724,20cyclictest20750irq/251-8000000.ethernet08:35:200
3274479994641,3cyclictest0-21swapper/108:55:011
3274479994631,9cyclictest0-21swapper/108:45:281
3274479994624,12cyclictest0-21swapper/109:45:291
3274479994615,6cyclictest231ktimers/112:10:181
3274476994639,4cyclictest20750irq/251-8000000.ethernet12:15:230
3274476994634,9cyclictest0-21swapper/009:10:000
327447699461,10cyclictest0-21swapper/007:35:010
327448099452,40cyclictest0-21swapper/211:50:012
327448099451,6cyclictest3274472-21cyclictest09:20:012
3274479994530,10cyclictest0-21swapper/110:35:311
3274479994526,9cyclictest0-21swapper/112:25:191
327447999451,9cyclictest0-21swapper/109:20:011
3274476994536,5cyclictest20950irq/209-8000000.ethernet12:00:290
3274480994436,5cyclictest1232-21in:imuxsock10:35:002
3274480994433,8cyclictest3324224-21gpgv12:00:012
3274479994432,6cyclictest3312970-21grep10:50:291
3274479994432,6cyclictest231ktimers/107:55:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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