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2026-09-02 - 14:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #8

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 rackcslot8s.osadl.org (updated Wed Sep 02, 2026 00:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391670,32ptp4l0-21swapper/019:05:160
218072630,0sleep30-21swapper/319:14:593
323852600,0sleep2311rcuc/223:12:572
282242590,0sleep20-21swapper/221:35:002
111391590,5ptp4l0-21swapper/419:05:334
1886925736,6sleep20-21swapper/219:06:512
111391570,11ptp4l0-21swapper/519:05:135
1895625646,6sleep70-21swapper/719:08:007
17662560,0sleep50-21swapper/523:15:165
1910524937,7sleep10-21swapper/119:09:541
1895524735,7sleep60-21swapper/619:07:596
1883324735,7sleep30-21swapper/319:06:283
126042460,0sleep20-21swapper/222:45:092
126042460,0sleep20-21swapper/222:45:092
111391330,0ptp4l0-21swapper/300:36:113
111391310,2ptp4l0-21swapper/300:25:113
111391310,0ptp4l0-21swapper/500:12:475
111391310,0ptp4l0-21swapper/400:31:144
111391300,0ptp4l0-21swapper/022:05:160
111391300,0ptp4l0-21swapper/019:25:140
111391290,1ptp4l9755-21irqstats22:40:155
111391290,0ptp4l0-21swapper/721:24:007
111391290,0ptp4l0-21swapper/523:51:005
111391290,0ptp4l0-21swapper/422:23:354
111391290,0ptp4l0-21swapper/200:01:232
111391290,0ptp4l0-21swapper/022:39:050
111391290,0ptp4l0-21swapper/021:36:300
111391290,0ptp4l0-21swapper/021:28:330
111391290,0ptp4l0-21swapper/000:13:270
111391280,3ptp4l0-21swapper/422:53:544
111391280,3ptp4l0-21swapper/422:07:404
111391280,2ptp4l0-21swapper/019:45:110
111391280,0ptp4l10144-21diskmemload21:15:070
111391280,0ptp4l0-21swapper/723:18:007
111391280,0ptp4l0-21swapper/722:51:507
111391280,0ptp4l0-21swapper/521:31:195
111391280,0ptp4l0-21swapper/423:37:074
111391280,0ptp4l0-21swapper/420:50:184
111391280,0ptp4l0-21swapper/023:19:150
111391280,0ptp4l0-21swapper/022:24:360
111391280,0ptp4l0-21swapper/022:10:370
111391280,0ptp4l0-21swapper/000:22:380
111391270,0ptp4l0-21swapper/721:42:497
111391270,0ptp4l0-21swapper/500:34:295
111391270,0ptp4l0-21swapper/023:24:310
111391270,0ptp4l0-21swapper/022:44:520
111391270,0ptp4l0-21swapper/000:15:220
111391260,0ptp4l0-21swapper/423:24:544
111391260,0ptp4l0-21swapper/423:03:594
111391260,0ptp4l0-21swapper/421:20:004
111391260,0ptp4l0-21swapper/421:00:204
111391260,0ptp4l0-21swapper/400:20:114
111391260,0ptp4l0-21swapper/320:21:383
111391260,0ptp4l0-21swapper/123:09:261
111391260,0ptp4l0-21swapper/023:51:420
111391260,0ptp4l0-21swapper/023:34:040
111391260,0ptp4l0-21swapper/022:26:570
111391260,0ptp4l0-21swapper/021:59:530
111391250,3ptp4l321ktimersoftd/200:14:302
111391250,1ptp4l1939099cyclictest23:43:234
111391250,0ptp4l0-21swapper/500:23:165
111391250,0ptp4l0-21swapper/500:17:035
111391250,0ptp4l0-21swapper/423:29:244
111391250,0ptp4l0-21swapper/422:30:144
111391250,0ptp4l0-21swapper/422:25:144
111391250,0ptp4l0-21swapper/422:03:384
111391250,0ptp4l0-21swapper/421:30:114
111391250,0ptp4l0-21swapper/421:26:234
111391250,0ptp4l0-21swapper/420:20:004
111391250,0ptp4l0-21swapper/419:45:164
111391250,0ptp4l0-21swapper/400:26:364
111391250,0ptp4l0-21swapper/323:42:223
111391250,0ptp4l0-21swapper/122:55:111
111391250,0ptp4l0-21swapper/121:29:331
111391250,0ptp4l0-21swapper/119:35:201
111391250,0ptp4l0-21swapper/023:47:240
111391250,0ptp4l0-21swapper/023:13:080
111391250,0ptp4l0-21swapper/022:33:050
111391250,0ptp4l0-21swapper/021:09:430
111391250,0ptp4l0-21swapper/019:40:150
111391250,0ptp4l0-21swapper/019:15:130
111391250,0ptp4l0-21swapper/000:28:070
111391250,0ptp4l0-21swapper/000:04:470
111391240,1ptp4l32270-21missed_timers20:45:185
111391240,1ptp4l28787-21fw_conntrack21:35:115
111391240,1ptp4l22229-21/usr/sbin/munin20:25:180
111391240,1ptp4l20782-21fw_conntrack00:30:130
111391240,1ptp4l18248-21timerandwakeup00:25:197
111391240,1ptp4l16571-21users23:35:205
111391240,1ptp4l11184-21irqrtprio21:10:140
111391240,0ptp4l0-21swapper/700:35:587
111391240,0ptp4l0-21swapper/523:06:365
111391240,0ptp4l0-21swapper/522:00:215
111391240,0ptp4l0-21swapper/519:20:135
111391240,0ptp4l0-21swapper/500:05:225
111391240,0ptp4l0-21swapper/423:57:394
111391240,0ptp4l0-21swapper/422:45:174
111391240,0ptp4l0-21swapper/422:45:174
111391240,0ptp4l0-21swapper/422:15:154
111391240,0ptp4l0-21swapper/422:10:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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