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2026-08-27 - 18:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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.

Note that this system runs a non-RT kernel.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Thu Aug 27, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
137012144519,14390sleep023891-21kworker/u8:109:34:360
238502122614,1201sleep115274-21kworker/u8:408:24:201
238372116020,1061sleep015274-21kworker/u8:408:24:150
15632109716,1066sleep314299-21kworker/u8:307:14:213
284427767,757sleep02880-21ntpq12:24:260
3252273226,687sleep13261-21/usr/sbin/munin10:44:141
5155257215,541sleep05189-21ps07:24:320
22063254516,471sleep022128-21ls08:19:190
23128246730,415sleep023216-21fschecks_time10:04:240
1598524416,423sleep016032-21ntpq07:59:280
1348124290,9sleep30-21swapper/309:34:063
1348124290,9sleep30-21swapper/309:34:063
26503239610,372sleep226552-21ntpq10:14:272
4543237215,342sleep14554-21ntpq09:04:291
319142278127,29sleep031960-21fschecks_count07:09:220
31188226827,229sleep031233-21ntpq10:29:310
3176622636,240sleep00-21swapper/012:14:170
10810226179,157sleep00-21swapper/011:09:040
10810226179,157sleep00-21swapper/011:09:040
29929222627,60sleep030079-21dpkg08:44:060
1976922220,7sleep00-21swapper/008:09:330
20105222110,197sleep120162-21awk09:54:231
32602222017,36sleep10-21swapper/108:49:361
5416221966,82sleep05498-21latency_hist09:09:050
17376221335,51sleep017450-21switchtime09:44:330
804322039,176sleep08062-21fschecks_count10:59:230
30273220212,57sleep030282-21acpi08:44:140
30273220212,57sleep030282-21acpi08:44:140
1494621965,10sleep00-21swapper/007:55:000
19038219410,172sleep2201-21jbd2/mmcblk2p2-11:34:092
13839218615,154sleep20-21swapper/209:35:192
18442218516,150sleep00-21swapper/009:49:260
135921859,97sleep00-21swapper/007:14:100
6977218216,137sleep00-21swapper/009:14:050
25374218047,38sleep025406-21tune2fs11:54:220
25374218047,38sleep025406-21tune2fs11:54:220
1011321780,7sleep00-21swapper/007:39:330
20873217511,151sleep020911-21ntp_kernel_pll_08:14:300
1334217515,23sleep10-21swapper/108:54:281
6820217211,145sleep06215-21/usr/sbin/munin07:29:320
1550821657,147sleep00-21swapper/011:21:440
9338216411,134sleep00-21swapper/009:20:310
5099216414,134sleep05127-21kernelversion10:49:260
26753216310,133sleep00-21swapper/010:14:330
9042216225,121sleep29069-21basename07:39:032
14116216118,129sleep214189-21unin-run11:19:032
16288216022,23sleep00-21swapper/009:41:100
2566321598,28sleep00-21swapper/008:29:240
281612157128,18sleep028180-21munin-run12:04:030
29990215112,13sleep00-21swapper/010:24:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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