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2026-06-11 - 06:53

OSADL QA Farm on Real-time of Mainline Linux

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

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 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
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackfslot4s.osadl.org (updated Thu Jun 11, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2632921260,3chrt26326-21grep00:40:010
2329821260,2chrt23300-21tr22:58:070
903621230,2chrt7330-21apt-get22:36:550
3264021230,3chrt32641-21cpu20:45:260
1148921220,3chrt11452-21ntp_states00:17:040
2132921200,1sleep021333-21seq23:43:420
2128821200,2chrt21287-21/usr/sbin/munin19:35:410
638021190,2sleep06381-21seq19:11:120
307321180,2chrt3071-21memory23:16:100
1218921180,3chrt12190-21chrt21:05:010
119121170,3chrt1190-21seq19:55:310
1009421160,4chrt10090-21aten2.4-expect21:50:350
243121150,3chrt2433-21sleep21:38:530
1960721150,3chrt19608-21runrttasks00:29:520
1755521150,2chrt17556-21ssh21:12:350
1230621150,3chrt12307-21runrttasks21:05:050
1622521140,2chrt16226-21switchtime22:47:180
2065321130,1sleep020651-21if_eth100:31:010
1434621130,2chrt14345-21seq23:33:180
2950721110,4chrt29508-21aten2.4-expect20:40:250
2853321090,3chrt28534-21sh23:54:430
250221090,2chrt2503-21sleep00:04:080
2325421080,3chrt23255-21sleep22:10:170
155421080,3chrt1555-21runrttasks22:26:030
1467121080,2sleep014674-21aten2.4_rfpower19:25:250
1312121060,2chrt13122-21sh20:14:310
2507121050,2chrt25072-21sleep23:49:430
2470721030,3chrt24708-21seq21:23:320
1552821030,3chrt15529-21runrttasks00:23:060
124421030,2chrt1245-21sh23:13:480
197752980,2sleep019779-21latency_hist22:05:050
195252980,2sleep019526-21basename21:16:040
89312960,2sleep08932-21chrt00:13:330
123192960,2sleep012320-21collect222:41:280
118752940,2sleep011872-21tune2fs19:20:380
287202840,2sleep028721-21sh21:30:030
117382830,2sleep011740-21seq23:29:590
5612820,2sleep0563-21sh22:24:530
278212820,2sleep027822-21seq23:05:190
67522770,2sleep06754-21seq21:45:350
52902730,2sleep05291-21chrt00:07:520
261762730,2sleep026177-21chrt20:35:170
305122710,1sleep030513-21chrt19:50:270
178412630,2sleep017842-21aten2.4_rfpower22:50:320
146262605,8sleep014628-21seq21:56:470
56312583,8sleep05625-21ntpq22:31:470
195742563,43sleep019548-21latency_hist20:25:020
90922550,2sleep09093-21chrt21:00:010
141792553,5sleep014311-21irqrtprio20:15:430
230622543,8sleep023068-21sleep20:30:140
41692533,8sleep04190-21irqstats21:41:120
29822538,18sleep02992-21ntpq19:05:410
254842523,10sleep025479-21irqstats23:01:070
244852520,2sleep024484-21cut19:41:150
294252503,7sleep029451-21perl23:55:520
73682480,2sleep07369-21chrt23:22:290
4982904819,22cyclictest0-21swapper22:19:210
52982450,2chrt5283-21ntpq20:01:190
4982904518,10cyclictest22294-21runrttasks20:29:030
4982904313,22cyclictest0-21swapper21:33:190
498290426,19cyclictest16572-21ntpq23:36:290
498290426,10cyclictest28233-21ntpq19:46:020
4982904215,20cyclictest22134-21runrttasks22:07:580
498290414,19cyclictest7208-21/usr/sbin/munin20:07:040
4982904118,16cyclictest17546-21/usr/sbin/munin19:30:330
4982904114,18cyclictest8217-21apt-get19:15:200
32302400,2sleep03233-21aten2.4_rfpower20:50:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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