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2025-12-24 - 23:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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.

Note that this system runs a non-RT kernel.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Wed Dec 24, 2025 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33302657918,6541sleep22822-21apt-get10:19:322
77692431818,4287sleep327549-21kworker/3:212:15:393
28407240327,3964sleep022850-21kworker/u8:111:39:340
59152207116,2040sleep320259-21kworker/3:008:44:383
242072189714,1870sleep115179-21kworker/1:109:41:391
13887217128,1689sleep124496-1kworker/1:1H09:10:041
31615216138,1447sleep031702-21/usr/sbin/munin11:49:390
72582813101,614sleep07299-21grep12:14:470
7489255711,506sleep07596-21fschecks_time08:49:400
12137243569,214sleep012202-21fschecks_time09:04:380
9147243028,390sleep09197-21if_eth008:54:450
23224241823,375sleep023225-21cron11:24:190
12377238217,350sleep112378-21sshd07:23:391
12377238217,350sleep112378-21sshd07:23:391
29852229655,125sleep030002-21latency_hist08:19:230
25078228914,259sleep125125-21ntpq09:44:461
23845227114,194sleep023989-21grep09:39:520
7040225558,181sleep07127-21xargs10:29:520
7040225558,181sleep07127-21xargs10:29:520
2938225253,177sleep03070-21cat10:19:220
11814223045,162sleep00-21swapper/009:04:220
3411222618,185sleep23429-21apt12:04:192
2754221428,174sleep02779-21kernelversion08:34:420
3159122088,25sleep07182-21cyclictest08:24:320
25131220815,176sleep025034-21/usr/sbin/munin11:29:400
2147222069,164sleep0369-21snmpd11:16:560
3215722056,163sleep00-21swapper/010:09:160
3215722056,163sleep00-21swapper/010:09:160
13299219417,165sleep113392-21cat07:24:521
13299219417,165sleep113392-21cat07:24:521
2477021879,14sleep00-21swapper/011:29:200
15097218414,156sleep015100-21cron09:14:190
11272217735,23sleep00-21swapper/007:19:420
11272217735,23sleep00-21swapper/007:19:420
29923217611,154sleep3369-21snmpd11:44:293
81272173105,52sleep18084-21/usr/sbin/munin12:19:211
19898217215,138sleep00-21swapper/011:11:390
7801216917,137sleep37733-21latency_hist10:34:233
9099216321,11sleep00-21swapper/010:37:230
28709216324,26sleep00-21swapper/009:54:580
16768216311,136sleep316915-21latency_hist09:19:233
115621638,13sleep00-21swapper/010:13:040
13606215922,117sleep113329-21apt-get09:09:241
17122215529,21sleep00-21swapper/007:39:210
951121525,111sleep00-21swapper/012:22:470
717921509,102sleep07257-21latency_hist08:49:240
1812621495,10sleep00-21swapper/009:23:080
5775214810,53sleep00-21swapper/012:09:510
2502121476,49sleep00-21swapper/008:03:080
12291214410,85sleep00-21swapper/012:30:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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