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2026-08-26 - 19:26

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 all highest latencies:
System rackfslot4s.osadl.org (updated Wed Aug 26, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1394321310,2chrt13695-21apt-get10:45:100
1483521260,2chrt14831-21ntpq08:16:540
3144121220,3chrt29734-21/usr/sbin/munin10:22:110
1464221190,2sleep014644-21cat09:56:490
877121160,2chrt8768-21aten2.4-expect11:25:470
2533921160,3chrt25334-21ntpq11:01:300
1927421160,1sleep019291-21fschecks_time09:15:530
3180921150,2chrt30436-21apt-get11:11:430
1257621150,3chrt12577-21chrt07:21:000
1345821120,2chrt11753-21/usr/sbin/munin11:32:090
173421110,4chrt1735-21sshd11:15:260
1303321090,2sleep013035-21uniq12:20:510
2794221080,3chrt27943-21sh09:28:220
1778721080,3chrt17788-21chrt11:39:010
2798221060,2sleep027981-21seq11:54:370
686821050,2chrt6869-21sleep07:11:300
418921050,3chrt4187-21/usr/sbin/munin08:51:170
738621040,2sleep07387-21basename10:35:340
339121020,2sleep03392-21seq10:29:150
298772980,2sleep029878-21seq11:56:510
293392970,2sleep029341-21seq10:19:350
222902960,2sleep022293-21sort07:36:270
170532920,2sleep017051-21idleruntime08:20:400
258482880,1sleep025847-21seq08:35:200
111382870,2sleep011136-21ntp_kernel_pll_08:10:570
94292860,1sleep09430-21seq09:49:330
63662850,1sleep06367-21chrt08:55:330
285282810,2sleep028529-21ld11:06:170
171262810,2sleep017124-21hddtemp_smartct10:00:570
225312800,1sleep022532-21seq12:35:270
104542800,2sleep010455-21chrt12:16:240
66712790,2sleep06669-21if_eth212:11:030
42362790,2sleep04238-21cut08:00:340
324892790,2sleep032491-21grep09:35:360
232362760,2sleep023234-21if_err_eth009:21:430
208932760,2sleep020894-21aten2.4-expect10:55:340
117512760,2sleep011753-21sed10:41:140
55362740,2sleep05537-21chrt12:09:430
208492720,2sleep020852-21proc_pri12:32:110
204542720,2sleep020455-21seq10:55:000
122532720,2sleep012254-21sh09:53:250
226452710,2sleep022646-21seq10:09:260
170882700,2sleep017089-21chrt12:26:220
319762670,1sleep031977-21ls08:45:060
235082660,2sleep023511-21grep11:47:150
50042650,2sleep05005-21seq11:20:130
151502590,2sleep015153-21sh09:10:010
239602580,1sleep023962-21aten2.4_rfpower07:40:230
19992589,37sleep00-21swapper07:05:030
12812550,2sleep01283-21chrt07:55:400
5089905323,19cyclictest28943-21sshd09:30:290
270302520,1sleep027031-21chrt07:45:200
83502510,1sleep08351-21chrt07:15:160
5089905118,13cyclictest20003-21ntpq11:41:590
29892510,2sleep02990-21seq09:40:070
5089905020,21cyclictest10154-21ntpq09:00:530
5089904918,22cyclictest15143-21diskmemload10:34:070
5089904918,22cyclictest15076-21hddtemp_smartct07:25:370
5089904818,12cyclictest629-21idleruntime08:46:300
5089904816,23cyclictest758-21ntp_states12:01:510
5089904816,22cyclictest15447-21sshd09:10:290
5089904815,15cyclictest30077-21/usr/sbin/munin07:50:400
5089904715,22cyclictest15143-21diskmemload10:12:020
5089904618,19cyclictest20486-21irqstats08:25:460
5089904616,11cyclictest6947-21/usr/sbin/munin08:05:490
5089904615,22cyclictest18094-21tune2fs07:30:360
5089904422,14cyclictest23060-21runrttasks08:30:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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