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2026-06-30 - 15:08

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 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.

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 Tue Jun 30, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1816421220,2sleep018163-21seq00:28:470
1542221210,3chrt15419-21ld22:46:380
809421200,4chrt7519-21/usr/sbin/munin20:05:400
2424821200,2chrt24249-21sleep23:49:200
2327121200,2chrt23272-21aten2.4_rfpower20:30:250
1839021180,2chrt18392-21switchtime20:21:300
177221180,2chrt1771-21seq00:04:220
1020521160,3chrt10204-21modprobe21:50:410
254021140,2chrt2541-21ssh00:05:400
361521130,3chrt3616-21cat20:50:430
567521120,2chrt5676-21chrt21:43:340
3104221110,2chrt31043-21runrttasks23:59:430
2355621100,2chrt23557-21sleep21:21:190
1846921090,2chrt18470-21sh22:51:130
1661721090,2chrt16619-21sed21:11:160
566021080,3chrt5661-21runrttasks00:10:270
1230021080,3chrt12301-21sh20:11:350
2204921070,3chrt22050-21runrttasks21:19:520
1234921060,3chrt12350-21sh00:20:300
559621050,2sleep05597-21seq19:10:160
1177121030,3chrt11772-21sh21:03:550
132872980,2sleep013285-21python323:32:140
287622920,1sleep028764-21ntp_offset19:46:080
152342900,2sleep015232-21entropy23:35:480
255222870,2sleep025523-21lockfile-create00:40:010
307962790,3sleep030799-21cut22:21:090
212542790,2sleep021255-21chrt19:35:030
201752780,2sleep020176-21chrt23:42:310
25332750,2sleep02534-21chrt19:56:100
196852740,2sleep019683-21if_eth200:31:040
151232730,1sleep015124-21chrt21:57:260
61762720,2sleep06177-21chrt20:55:190
295422710,2sleep029534-21awk22:20:010
252922710,1sleep025291-21cut23:50:500
68192700,2sleep06821-21seq22:34:100
121592680,2sleep012162-21sh19:20:240
154942670,2sleep015495-21chrt19:25:330
101732670,2sleep010174-21chrt22:39:170
34322669,44sleep03503-21/usr/sbin/munin19:06:050
221592630,1sleep022160-21seq22:08:210
18772630,1sleep01878-21sshd23:15:400
315972580,2sleep031601-21sed23:11:070
64412560,4sleep06436-21ssh21:45:080
103502560,1sleep010351-21chrt00:16:460
95092513,9sleep09525-21df19:16:220
5436905119,23cyclictest0-21swapper23:29:020
5436905017,24cyclictest0-21swapper23:23:530
5436905017,22cyclictest0-21swapper23:04:540
5436904818,22cyclictest0-21swapper22:42:410
303292480,3chrt30327-21/usr/sbin/munin21:31:350
5436904716,21cyclictest0-21swapper22:27:380
543690446,19cyclictest28850-21ntpq23:06:560
543690445,10cyclictest12671-21df21:05:270
5436904411,25cyclictest20637-21apt-get22:55:290
543690435,29cyclictest409-21perl20:45:350
543690435,10cyclictest27397-21ntp_states20:36:120
5436904319,14cyclictest0-21swapper22:14:460
543690425,27cyclictest30508-21ntpq20:41:110
170542420,2sleep017055-21chrt22:01:080
543690417,15cyclictest22500-21ntpq19:36:060
543690417,14cyclictest26089-21df_inode21:25:450
543690415,27cyclictest14805-21ntpq20:15:560
543690415,16cyclictest20313-21diskstats20:25:320
543690414,11cyclictest5682-21ntpq20:01:150
5436904116,17cyclictest1233-21runrttasks21:36:410
543690405,18cyclictest26051-21python319:41:450
543690397,23cyclictest31985-21ntp_states19:51:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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