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2026-07-04 - 11:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Sat Jul 04, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
149821350,3sleep20-21swapper/221:28:222
149821350,3sleep20-21swapper/221:28:222
149821350,3sleep20-21swapper/221:28:222
1810021270,2sleep20-21swapper/223:38:232
1810021270,2sleep20-21swapper/223:38:232
98852990,3sleep20-21swapper/200:43:232
98852990,3sleep20-21swapper/200:43:232
29142800,3sleep30-21swapper/300:23:263
29142800,3sleep30-21swapper/300:23:263
73192770,2chrt7317-21ntpq23:08:300
73192770,2chrt7317-21ntpq23:08:300
151132740,2sleep0171ktimers/023:28:320
151132740,2sleep0171ktimers/023:28:320
317622720,3sleep30-21swapper/322:48:233
77302620,2sleep30-21swapper/321:43:273
77302620,2sleep30-21swapper/321:43:273
77302620,2sleep30-21swapper/321:43:273
81552590,3chrt0-21swapper/020:18:250
81552590,3chrt0-21swapper/020:18:250
14222570,4chrt0-21swapper/319:58:553
14222570,4chrt0-21swapper/319:58:553
157652530,2chrt15766-21cat23:33:111
157652530,2chrt15766-21cat23:33:111
140322530,1sleep014068-21/usr/sbin/munin20:33:300
140322530,1sleep014068-21/usr/sbin/munin20:33:300
140322530,1sleep014068-21/usr/sbin/munin20:33:300
129502530,4chrt0-21swapper/221:58:252
129502530,4chrt0-21swapper/221:58:252
15851995236,8cyclictest27118-21/usr/sbin/munin00:03:370
15851995236,8cyclictest27118-21/usr/sbin/munin00:03:370
15851995236,8cyclictest27118-21/usr/sbin/munin00:03:370
272392480,4sleep30-21swapper/321:08:333
272392480,4sleep30-21swapper/321:08:333
82192470,2sleep30-21swapper/323:13:113
82192470,2sleep30-21swapper/323:13:113
238712450,2sleep30-21swapper/319:33:263
238712450,2sleep30-21swapper/319:33:263
130942450,2sleep113038-21latency_hist20:33:151
130942450,2sleep113038-21latency_hist20:33:151
309752440,3chrt0-21swapper/319:53:243
309752440,3chrt0-21swapper/319:53:243
7812430,2sleep0776-21strings19:58:270
7812430,2sleep0776-21strings19:58:270
316292430,3sleep20-21swapper/200:13:282
282322430,1sleep128426-21grep00:03:351
282322430,1sleep128426-21grep00:03:351
282322430,1sleep128426-21grep00:03:351
15854994312,6cyclictest281ktimers/122:01:471
15854994312,6cyclictest281ktimers/122:01:471
15854993931,5cyclictest0-21swapper/100:03:181
15854993931,5cyclictest0-21swapper/100:03:181
15854993931,5cyclictest0-21swapper/100:03:181
257972370,3sleep00-21swapper/022:33:200
257972370,3sleep00-21swapper/022:33:200
1585499375,5cyclictest281ktimers/121:44:501
1585499375,5cyclictest281ktimers/121:44:501
1585499375,5cyclictest281ktimers/121:44:501
282502350,2chrt0-21swapper/322:38:263
282502350,2chrt0-21swapper/322:38:263
15851993522,10cyclictest0-21swapper/000:08:320
15851993522,10cyclictest0-21swapper/000:08:320
218652340,3sleep30-21swapper/320:53:343
218652340,3sleep30-21swapper/320:53:343
218652340,3sleep30-21swapper/320:53:343
196352340,3sleep10-21swapper/120:48:291
196352340,3sleep10-21swapper/120:48:291
1585499348,6cyclictest281ktimers/120:05:251
1585499348,6cyclictest281ktimers/120:05:251
15854993428,5cyclictest24796-21gltestperf21:03:241
15854993428,5cyclictest24796-21gltestperf21:03:241
80362330,2sleep08222-21idleruntime00:38:240
185452330,2sleep018732-21timerwakeupswit19:18:330
1585699331,8cyclictest30627-21chrt00:12:213
1585699331,8cyclictest30627-21chrt00:12:213
1585499339,6cyclictest281ktimers/119:19:581
1585499339,21cyclictest281ktimers/119:57:441
1585499339,21cyclictest281ktimers/119:57:441
1585499337,5cyclictest281ktimers/120:18:041
1585499337,5cyclictest281ktimers/120:18:041
1585499337,5cyclictest281ktimers/120:18:041
1585499337,4cyclictest281ktimers/123:05:491
1585499337,4cyclictest281ktimers/123:05:491
15854993328,3cyclictest28058-21idleruntime-cro21:13:121
15854993328,3cyclictest28058-21idleruntime-cro21:13:121
15854993326,5cyclictest281ktimers/123:19:051
15854993326,5cyclictest281ktimers/123:19:051
15854993326,5cyclictest281ktimers/120:58:451
15854993326,5cyclictest281ktimers/120:58:451
15854993310,11cyclictest29-21ksoftirqd/122:39:251
15854993310,11cyclictest29-21ksoftirqd/122:39:251
34642320,2sleep13460-21strings22:58:261
34642320,2sleep13460-21strings22:58:261
34642320,2sleep13460-21strings22:58:261
1585499328,5cyclictest281ktimers/121:30:161
1585499328,5cyclictest281ktimers/121:30:161
1585499328,5cyclictest281ktimers/121:30:161
15851993225,5cyclictest30800-21unixbench-2d22:43:350
15851993225,5cyclictest30800-21unixbench-2d22:43:350
15851993225,5cyclictest30800-21unixbench-2d22:43:350
15851993225,5cyclictest12519-21tail23:23:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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