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2025-07-19 - 01:31

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 Fri Jul 18, 2025 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2584621340,2sleep025845-21date08:05:030
886221250,2chrt8861-21head08:35:260
2673321230,2sleep026736-21wc10:08:030
2042921210,3chrt20430-21sh09:56:520
2844921130,2sleep028447-21swap12:07:150
773321120,3chrt7734-21sh10:32:110
400921120,2chrt4008-21grep08:25:340
554821070,2chrt5551-21sed11:26:030
9682940,2sleep0969-21ls08:20:020
309652880,2sleep030966-21ld12:11:540
13452870,2sleep01347-21ntp_states12:17:040
54462850,2sleep05448-21ls07:25:060
210992830,1sleep021102-21grep07:55:270
142202810,1sleep014219-21ld11:41:330
63662780,2sleep06363-21ssh09:31:220
4702760,1sleep0472-21sh10:20:010
3020090766,51cyclictest22637-21ntpq11:56:530
3020090765,61cyclictest23127-21/usr/sbin/munin11:02:200
3020090756,59cyclictest27675-21ssh09:11:500
3020090756,58cyclictest14493-21apt-get10:45:380
286922759,54sleep028694-21ntpq07:05:410
62292740,2sleep06231-21cut12:26:060
33542740,2sleep03358-21cut09:26:060
3020090749,56cyclictest11233-21sort07:35:410
3020090747,57cyclictest9169-21ntpq09:36:280
3020090747,57cyclictest30310-21ssh09:16:230
3020090745,58cyclictest11509-21df_inode08:40:310
3020090745,11cyclictest3418-21apt-get10:25:250
3020090744,59cyclictest20763-21/usr/sbin/munin10:55:490
3020090744,12cyclictest17583-21/usr/sbin/munin10:50:120
3020090737,46cyclictest1101-21ntpq09:22:120
3020090736,56cyclictest859-21snmpd08:45:160
3020090735,10cyclictest13092-21ntpq10:41:330
3020090734,9cyclictest29534-21ntpq08:11:060
3020090734,59cyclictest9666-21hddtemp_smartct10:35:570
3020090734,58cyclictest19178-21/usr/sbin/munin07:50:520
30200907314,52cyclictest25966-21ssh12:02:470
3020090727,54cyclictest16227-21apt-get08:50:140
3020090725,56cyclictest8374-21irqstats11:31:060
3020090725,56cyclictest5703-21apt-get07:26:130
3020090725,12cyclictest441-21ntpq11:16:470
3020090725,11cyclictest27789-21/usr/sbin/munin11:08:010
3020090724,9cyclictest1926-21ssh11:20:140
30200907216,46cyclictest10587-21seq11:35:430
3020090716,56cyclictest16331-21hddtemp_smartct11:45:580
3020090716,54cyclictest2692-21apt-get12:20:200
3020090715,56cyclictest9293-21ntpq07:31:050
3020090715,56cyclictest24832-21ntpq09:05:570
3020090715,56cyclictest228-21usb-storage09:40:490
3020090715,46cyclictest932-21aten2.4-expect10:20:390
3020090714,57cyclictest19733-21ssh11:51:330
3020090714,57cyclictest13552-21/usr/sbin/munin09:45:560
3020090714,55cyclictest27885-21sshd10:10:400
3020090714,11cyclictest12267-21ntpq12:36:430
3020090714,10cyclictest14500-21ntp_states07:41:270
30200907117,45cyclictest22208-21sshd10:00:390
30200907114,47cyclictest6121-21/usr/sbin/munin08:30:490
3020090706,55cyclictest9389-21ssh12:31:280
3020090706,11cyclictest29905-21ntpq11:11:170
3020090704,9cyclictest31466-21ntpq07:11:130
3020090704,9cyclictest19945-21ntpq08:56:180
3020090704,8cyclictest883-21runrttasks07:45:340
3020090704,56cyclictest859-21snmpd09:50:410
3020090704,56cyclictest25923-21/usr/sbin/munin08:05:240
30200907016,44cyclictest21402-21/usr/sbin/munin09:00:230
3020090695,10cyclictest1562-21ntp_states07:16:180
3020090694,9cyclictest1889-21irqstats08:20:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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