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2025-11-07 - 16:26

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 376 highest latencies:
System rackfslot4s.osadl.org (updated Fri Nov 07, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
322321190,2chrt3222-21/usr/sbin/munin07:25:440
809921180,2chrt8098-21/usr/sbin/munin07:35:350
1962021160,3chrt19619-21/usr/sbin/munin10:00:450
994621130,2chrt9938-21users09:42:240
411021130,3chrt4112-21modprobe11:30:010
3176621110,2chrt31763-21hddtemp_smartct11:20:550
204221110,3chrt2043-21sleep12:24:230
2260821090,3chrt22609-21cat10:05:590
187282890,2sleep018730-21ssh11:56:020
61992850,1sleep06201-21ssh11:32:540
50032850,2sleep05006-21idleruntime-cro12:30:000
126422830,1sleep012645-21sort10:46:090
292342790,2sleep029235-21latency_hist12:15:050
97462760,2sleep09747-21ntp_states08:41:110
58292730,1sleep05830-21cat12:31:010
2592227310,49sleep025930-21ntpq07:05:440
171232710,2sleep017124-21wc10:55:050
114102700,2sleep011411-21df08:45:250
251762650,2sleep025177-21uname09:11:590
188362603,48sleep018866-21/usr/sbin/munin10:57:200
47902553,7sleep04785-21ntp_states10:32:060
26682552,44sleep02665-21ssh09:30:220
142342553,9sleep014241-21ntpq07:46:440
133102543,41sleep013437-21irqrtprio11:46:060
222392535,8sleep022235-21ntpq09:05:570
165292533,7sleep016533-21ntpq07:50:580
11532533,8sleep01159-21ld07:20:590
105442533,7sleep010547-21df07:40:290
27389905217,9cyclictest23611-21diskmemload11:05:540
264082513,8sleep026362-21ssh12:10:030
306312493,8sleep030638-21ntpq09:21:150
2738990487,21cyclictest26831-21ntp_states11:12:020
27389904818,23cyclictest0-21swapper10:13:050
316802473,7sleep031685-21ssh10:21:570
27389904718,22cyclictest0-21swapper11:53:590
27389904616,23cyclictest0-21swapper12:02:380
27389904616,22cyclictest0-21swapper10:39:360
27389904616,22cyclictest0-21swapper10:18:430
27389904614,24cyclictest0-21swapper12:39:240
27389904614,23cyclictest0-21swapper09:35:110
2738990455,20cyclictest29336-21/usr/sbin/munin11:16:450
27389904517,21cyclictest0-21swapper09:18:090
27389904515,23cyclictest0-21swapper11:03:240
2738990445,11cyclictest13520-21munin-run09:50:020
27389904415,22cyclictest0-21swapper12:18:450
27389904413,24cyclictest0-21swapper11:44:550
27389904412,24cyclictest0-21swapper08:15:390
164532442,6sleep016449-21ssh09:55:160
2738990434,11cyclictest5515-21diskstats07:30:350
2738990434,11cyclictest1625-21users09:27:210
2738990424,11cyclictest6025-21seq08:35:060
2738990424,10cyclictest19010-21ntpq07:55:540
2738990423,18cyclictest13932-21df08:50:260
27389904212,22cyclictest0-21swapper11:39:400
2738990415,9cyclictest28516-21ntpq07:10:580
2738990415,11cyclictest16986-21irqstats08:55:450
27389904120,14cyclictest0-21swapper10:44:080
27389904111,21cyclictest0-21swapper09:53:460
2738990404,9cyclictest26629-21ntpq08:10:560
2738990404,17cyclictest19853-21ntp_states09:01:120
27389904019,13cyclictest0-21swapper10:29:090
2738990394,28cyclictest4350-21irqstats08:30:460
2738990393,10cyclictest2137-21ntpq08:26:100
27389903913,9cyclictest31202-21aten2.4_rfpower08:21:140
2738990388,11cyclictest20922-21diskstats08:00:350
2738990388,10cyclictest30313-21df07:15:270
2738990376,10cyclictest23404-21df08:05:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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