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2026-09-08 - 07:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Tue Sep 08, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
294442240165,24sleep20-21swapper/219:05:072
311632234162,59sleep00-21swapper/019:06:540
311492234164,21sleep10-21swapper/119:06:431
313072205168,24sleep30-21swapper/319:08:473
2169121390,2sleep23149499cyclictest21:10:242
3100721240,3sleep10-21swapper/100:00:151
31494997673,2cyclictest0-21swapper/222:31:162
139932610,1sleep20-21swapper/220:55:112
60202500,2sleep230-21rcuc/221:50:132
88922460,1sleep10-21swapper/123:10:191
133252420,2sleep20-21swapper/222:05:232
31487993411,11cyclictest25194-21tr20:05:201
31487993411,11cyclictest25194-21tr20:05:201
3148799311,17cyclictest0-21swapper/121:01:371
3148799311,12cyclictest15182-21perf19:45:001
3148799294,12cyclictest1584-21switchtime00:05:231
31487992914,3cyclictest0-21swapper/121:40:241
3148799291,12cyclictest30353-21sed00:00:021
3148799291,10cyclictest23136-21unixbench-2d23:40:261
127412290,7sleep011-21rcuc/023:20:020
31494992810,9cyclictest0-21swapper/222:00:112
3148799280,16cyclictest24477-21chrt21:18:421
31478992815,5cyclictest0-21swapper/021:48:200
3147899281,20cyclictest0-21swapper/021:53:180
3147899280,22cyclictest20528-21kworker/u8:000:15:010
31487992710,3cyclictest12707-21latency_hist23:20:011
3147899270,21cyclictest0-21swapper/021:31:530
248282270,3sleep2311ktimersoftd/223:45:192
3149899269,14cyclictest32214-21sshd00:02:173
31478992615,3cyclictest0-21swapper/022:40:320
3147899261,19cyclictest0-21swapper/023:05:110
3147899260,20cyclictest0-21swapper/022:59:430
3147899260,20cyclictest0-21swapper/000:15:200
3147899260,19cyclictest0-21swapper/023:27:410
3147899260,19cyclictest0-21swapper/022:10:230
31498992517,2cyclictest0-21swapper/300:29:173
3149899251,22cyclictest0-21swapper/321:06:333
3149499251,3cyclictest87350irq/126-enp1s0-22:20:212
31487992518,5cyclictest21690-21swap21:10:241
3148799251,4cyclictest10954-21memory22:00:171
3148799251,21cyclictest8102-21processes00:20:241
3147899254,13cyclictest23693-21kworker/u8:221:20:500
3147899253,15cyclictest0-21swapper/021:16:420
31478992520,3cyclictest808-21snmpd19:40:130
3147899251,6cyclictest0-21swapper/022:21:040
3147899251,5cyclictest756-21kworker/u8:021:57:030
3147899251,5cyclictest0-21swapper/023:39:010
3147899251,5cyclictest0-21swapper/023:39:010
31478992515,3cyclictest0-21swapper/000:05:100
3147899251,19cyclictest0-21swapper/000:31:330
3147899251,18cyclictest0-21swapper/023:21:550
3147899251,17cyclictest0-21swapper/000:36:330
3147899250,6cyclictest0-21swapper/023:59:150
3147899250,18cyclictest0-21swapper/000:20:500
3149899249,3cyclictest14447-21/usr/sbin/munin22:10:143
3149899241,21cyclictest0-21swapper/320:45:153
3149899241,21cyclictest0-21swapper/320:25:203
3149899241,11cyclictest0-21swapper/321:47:173
3149899241,10cyclictest0-21swapper/319:40:103
3149499247,5cyclictest21780-21awk20:00:012
31494992418,4cyclictest32058-21head21:35:172
3148799241,20cyclictest6446-21taskset00:17:111
3147899245,9cyclictest23957-21cut23:45:130
3147899242,14cyclictest0-21swapper/022:32:030
3147899241,5cyclictest763-21dbus-daemon20:00:010
3147899241,5cyclictest0-21swapper/022:28:140
3147899241,5cyclictest0-21swapper/022:28:140
3147899241,17cyclictest0-21swapper/022:36:080
3147899241,11cyclictest28386-21perf20:15:010
31498992316,4cyclictest15730-21head23:25:163
31498992315,5cyclictest32486-21ntp_states21:35:233
3149899231,15cyclictest0-21swapper/320:01:033
3149899231,11cyclictest3770-21sshd22:59:173
31498992310,3cyclictest827-21runrttasks00:09:203
3149499239,3cyclictest26236-21cstates23:50:172
3149499232,11cyclictest23627-21munin-run23:45:012
3149499231,20cyclictest0-21swapper/221:19:272
3148799236,3cyclictest0-21swapper/121:28:511
3148799232,3cyclictest0-21swapper/123:46:001
3148799231,8cyclictest0-21swapper/123:20:581
31487992317,3cyclictest5887-21grep19:20:241
3148799231,19cyclictest0-21swapper/122:20:121
3148799231,19cyclictest0-21swapper/120:10:161
3147899236,3cyclictest87550irq/128-enp1s0-20:15:570
3147899233,10cyclictest0-21swapper/022:15:200
3147899232,4cyclictest1848-21grep21:40:160
31478992319,3cyclictest0-21swapper/021:07:180
3147899231,4cyclictest0-21swapper/023:00:540
3147899231,4cyclictest0-21swapper/022:04:300
31478992314,2cyclictest0-21swapper/022:49:450
31478992312,3cyclictest808-21snmpd19:50:150
3147899231,15cyclictest0-21swapper/022:53:150
3147899231,14cyclictest0-21swapper/023:41:220
3147899231,13cyclictest0-21swapper/023:51:240
3147899231,11cyclictest20192-21diskmemload23:10:200
3147899230,14cyclictest0-21swapper/021:10:260
3149899223,4cyclictest0-21swapper/321:52:353
3149899221,9cyclictest0-21swapper/319:47:163
3149899221,3cyclictest87350irq/126-enp1s0-23:20:013
3149899220,20cyclictest0-21swapper/320:40:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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