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2025-03-17 - 02:02

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 Sun Mar 16, 2025 12:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
169121280,3chrt32334-21sendmail-msp08:03:300
1424821220,2chrt12292-21sendmail-msp11:44:050
2813521210,3chrt28133-21df08:55:310
2971121180,2sleep029766-21ls11:10:330
2462521130,3chrt24623-21grep12:05:210
2182521120,3chrt20126-21sendmail-msp08:43:040
1803821120,2chrt18039-21sleep11:52:000
71921110,1sleep0716-21kernelversion11:16:080
669221110,2chrt6694-21if_err_can010:22:170
3048121100,2chrt30482-21sh10:04:400
520021080,3chrt5201-21modprobe11:25:540
512421060,2chrt5123-21ssh09:12:490
2737321020,2chrt27374-21sleep07:50:110
2482321020,2chrt24824-21sh07:45:080
265222930,1sleep026524-21irqrtprio11:02:320
264812880,3chrt26441-21ntp_states08:51:180
50082870,2sleep05009-21ls11:25:190
318372870,3chrt43-21kswapd009:02:460
701990777,60cyclictest10739-21ntpq09:24:210
7019907611,55cyclictest4539-21grep12:30:510
7019907514,53cyclictest25446-21snmpd12:03:480
7019907513,52cyclictest22215-21sendmail-msp07:40:120
160422750,2sleep016044-21cut08:30:500
701990746,56cyclictest1990-21ntpq09:07:130
701990745,48cyclictest14190-21seq09:31:270
701990744,49cyclictest29130-21apt-get12:16:230
7019907414,50cyclictest3017-21diskmemload10:45:560
7019907413,53cyclictest2520-21ntpq12:26:150
7019907412,54cyclictest32093-21apt-get12:23:090
7019907411,54cyclictest12607-21cpu07:20:540
272542740,2sleep027253-21perl12:11:260
701990736,47cyclictest2823-21diskstats08:05:320
701990734,60cyclictest11405-21ntpq08:22:110
701990726,55cyclictest22582-21apt-get09:50:300
701990725,47cyclictest228-21usb-storage09:42:300
701990724,57cyclictest32628-21/usr/sbin/munin10:10:570
701990724,48cyclictest16234-21/usr/sbin/munin10:41:570
7019907211,53cyclictest8825-21latency_hist09:20:110
7019907211,53cyclictest7014-21cyclictest10:55:300
701990717,53cyclictest25697-21apt-get09:55:200
701990717,43cyclictest9509-21munin-run12:40:070
701990716,56cyclictest22591-21modprobe09:50:010
701990716,56cyclictest10300-21ps07:15:430
701990715,53cyclictest22756-21apt-get08:45:180
7019907114,47cyclictest20384-21ssh10:51:070
701990709,51cyclictest7131-21apt-get07:10:120
701990706,53cyclictest12640-21apt-get08:25:180
701990706,47cyclictest18404-21munin-run09:40:030
701990705,55cyclictest17703-21/usr/sbin/munin08:35:370
701990704,57cyclictest3017-21diskmemload11:55:530
701990704,56cyclictest21024-21sleep07:36:250
701990704,56cyclictest15768-21ntpq07:26:000
7019907014,48cyclictest10699-21/usr/sbin/munin11:36:140
7019907011,49cyclictest7808-21irqstats11:31:070
701990696,54cyclictest15952-21sh11:48:290
701990695,55cyclictest25446-21snmpd11:08:220
701990694,56cyclictest4625-21runrttasks10:17:210
7019906914,45cyclictest31940-21seq10:08:160
701990684,55cyclictest18644-21python307:31:280
701990684,54cyclictest30754-21irqstats07:55:460
701990676,51cyclictest7893-21df_inode08:15:310
701990675,54cyclictest13127-21df10:35:450
701990675,52cyclictest10322-21df_inode10:30:390
701990674,53cyclictest8161-21ps10:25:180
701990674,45cyclictest11380-21swap09:25:390
7019906710,50cyclictest6389-21mailstats08:11:250
701990614,49cyclictest7047-21latency_hist07:10:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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