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2025-09-19 - 01:10

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 100 highest latencies:
System rackfslot4s.osadl.org (updated Thu Sep 18, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1468521170,3chrt14686-21fschecks_count10:50:490
915421150,3chrt9153-21/usr/sbin/munin07:36:260
1537921150,2chrt15380-21sh08:54:160
563521090,2chrt5637-21cat09:36:010
2704121070,2chrt27043-21cut09:16:100
2520821030,3chrt25209-21sh10:11:010
1950721000,2chrt19508-21sleep07:57:140
22942840,2sleep02289-21awk07:25:010
14862800,2sleep01488-21rm09:28:420
257182768,18sleep025730-21ntpq07:05:460
52862690,2sleep05290-21cut11:31:550
301202680,2sleep030121-21sh07:15:290
131552670,1sleep013156-21cat10:47:160
203042610,2sleep020305-21rm11:59:250
32762573,44sleep02835-21apt-get10:30:260
81692553,9sleep08176-21sleep09:40:430
65982534,7sleep06604-21ntpq08:35:550
275032534,41sleep027510-21df_inode10:15:400
26142533,42sleep02617-21sleep10:29:220
38112510,2sleep03815-21wc12:27:190
27175905119,24cyclictest0-21swapper10:07:530
223572510,1sleep022358-21cat12:02:160
187062510,2sleep018707-21sh10:00:010
35522501,4sleep00-21swapper08:30:370
27175905020,22cyclictest0-21swapper11:18:260
253522500,3sleep025353-21sleep09:13:060
109892503,8sleep010993-21df_inode08:45:290
289972490,5sleep028998-21sleep09:20:190
276642490,4chrt27662-21/usr/sbin/munin07:10:350
223052493,8sleep0886-21sh08:03:160
139942493,6sleep013939-21ssh09:51:010
122432490,3chrt12242-21sshd11:45:020
319942483,36sleep031997-21ntpq11:21:260
2717590485,14cyclictest8590-21hddtemp_smartct12:36:500
27175904819,22cyclictest0-21swapper09:48:140
246412480,4chrt24639-21ld12:06:300
150582480,2sleep015059-21ls11:50:050
27175904718,22cyclictest0-21swapper11:08:260
27175904616,21cyclictest0-21swapper12:18:370
27175904614,16cyclictest17354-21df10:55:420
214712464,34sleep021458-21munin-run10:05:020
128212463,34sleep012835-21aten2.4_rfpower07:45:230
27175904515,23cyclictest0-21swapper11:39:060
27175904515,23cyclictest0-21swapper11:13:270
198012453,34sleep019768-21apt-get11:00:190
38732443,34sleep03857-21ssh09:32:460
2717590444,19cyclictest5208-21diskstats12:30:430
27175904421,16cyclictest0-21swapper12:20:140
27175904415,22cyclictest0-21swapper11:29:350
27175904415,21cyclictest0-21swapper10:37:250
27175904316,10cyclictest547-21/usr/sbin/munin08:25:370
27175904315,9cyclictest22898-21/usr/sbin/munin08:05:580
27175904315,21cyclictest0-21swapper11:53:020
2717590426,10cyclictest30972-21hddtemp_smartct08:20:380
2717590425,18cyclictest30325-21df_inode10:20:460
2717590425,10cyclictest22292-21users09:06:300
27175904217,16cyclictest2677-21/usr/sbin/munin07:27:160
27175904212,21cyclictest0-21swapper12:14:510
2717590415,17cyclictest9203-21ntpq08:41:010
2717590415,17cyclictest6268-21ntpq07:31:030
2717590415,10cyclictest25503-21aten2.4_rfpower08:10:240
2717590414,17cyclictest19437-21ntp_states09:01:130
2717590414,12cyclictest28884-21ntpq08:15:490
27175904118,16cyclictest0-21swapper10:42:360
2717590394,27cyclictest16205-21memory07:50:480
2717590393,11cyclictest16027-21df08:55:290
2717590376,11cyclictest10569-21diskstats07:40:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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