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2026-07-31 - 16:06

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 all highest latencies:
System rackfslot4s.osadl.org (updated Fri Jul 31, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
843822120,1chrt8437-21aten2.4_rfpower07:05:480
2484321220,2chrt24828-21ntpq07:31:040
1583321210,4chrt15828-21ntpq11:26:230
3096021200,3chrt30962-21chrt11:50:000
270221200,4chrt2703-21sh07:47:540
766021180,2sleep07662-21processes09:37:200
2053821180,4chrt20534-21ntpq09:56:280
3093421170,3chrt30935-21runrttasks10:12:070
3104921150,3chrt31048-21perl11:00:540
2142121150,3chrt21422-21seq09:10:010
1514921150,1sleep015152-21seq10:37:020
758921140,2chrt7588-21ssh11:14:450
2318021140,2sleep023183-21chrt10:49:320
1428521130,2chrt14284-21seq12:13:070
742021120,3chrt7421-21if_eth207:55:430
109721120,1sleep01096-21seq11:53:200
667321110,3chrt6674-21modprobe10:25:000
366121110,3chrt3646-21ntpq11:57:090
2901521110,3chrt29013-21if_can009:21:020
2415721110,2chrt24158-21ssh12:27:560
1601421100,2chrt16016-21sleep09:50:280
1002021100,2chrt10018-21if_eth109:41:040
2063721090,3chrt20638-21seq11:34:110
2333921080,1sleep023340-21gcc09:12:210
1918421070,1sleep019185-21cat08:15:070
827921050,2chrt8280-21sleep08:48:460
2799721050,2chrt27998-21sleep12:34:130
1506721050,2chrt15068-21chrt09:48:310
288532940,2sleep028854-21sh10:09:300
133612870,2sleep013363-21ld08:56:210
298872860,2sleep029886-21ld12:36:340
176702850,2sleep017674-21wc08:11:320
255982830,2sleep025600-21rm08:25:060
83232800,2chrt8324-21runrttasks12:04:450
287772800,1sleep028780-21chrt08:30:000
320832780,2sleep032084-21seq08:35:160
247042770,1sleep024703-21seq11:40:360
178282730,2sleep017829-21sh12:18:400
228512720,2sleep022852-21chrt11:37:090
305072690,2sleep030508-21cat07:40:410
132262670,1sleep013229-21sort11:22:220
24402660,2sleep02441-21chrt10:17:580
111142640,2sleep011115-21chrt11:20:040
209502630,2sleep020949-21seq07:25:320
29222620,2sleep02923-21chrt11:07:070
258612610,2sleep025863-21latency_hist10:05:050
32802600,2sleep03282-21chrt09:31:050
196812583,7sleep019720-21memory12:21:090
280252575,44sleep028031-21hddtemp_smartct10:56:390
156202563,8sleep015632-21ntpq07:16:160
182412553,9sleep018235-21ntpq10:41:320
277682530,2sleep027798-21sort07:35:510
248272533,6sleep024822-21ssh10:51:220
116912530,3chrt11692-21fschecks_count07:10:360
30322520,2sleep03035-21sort08:40:280
46292503,38sleep04630-21memory07:50:500
11116905020,23cyclictest0-21swapper12:08:220
20392493,38sleep021392-21diskmemload09:29:220
11116904920,22cyclictest0-21swapper10:33:490
292602480,3chrt29257-21/usr/sbin/munin08:30:270
151572483,35sleep015210-21apt-config09:00:080
265362470,2sleep026537-21ssh09:17:010
11116904417,10cyclictest11392-21sleep08:53:480
1111690434,11cyclictest8385-21runrttasks10:26:510
1111690426,10cyclictest13356-21diskstats08:05:350
1111690404,9cyclictest104002sleep008:00:380
11116904011,21cyclictest20408-21munin-run07:25:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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