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2025-09-17 - 00:01

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 highest latencies:
System rackfslot4s.osadl.org (updated Tue Sep 16, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
217621210,2sleep02178-21cut10:51:020
436621140,2sleep04370-21aten2.4_rfpower11:55:350
1586621140,2chrt15858-21ntpq10:16:550
2849521130,3chrt28493-21aten2.4-expect11:40:310
2394721090,1sleep023948-21irqrtprio11:32:000
3099421080,2chrt30997-21sed09:46:090
2939121070,3chrt29392-21sh08:42:040
2211421070,3chrt22113-21ssh11:28:550
467821000,2chrt4612-21ntp_states09:57:130
23172950,2sleep02318-21irqrtprio11:51:020
158632840,2sleep015865-21grep11:17:120
128312840,2sleep012832-21ld11:11:430
96792820,2sleep09680-21if_eth111:06:440
101012810,2sleep010104-21cut10:07:010
122702800,1sleep012273-21wc09:12:300
211902750,2sleep021174-21ntpq10:26:220
134632730,1sleep013466-21wc10:12:190
8312690,2sleep0829-21sendmail_mailtr07:46:380
13620906837,22cyclictest32712-21python311:47:120
62572670,2sleep06258-21aten2.4_rfpower10:00:370
13620906737,21cyclictest10297-21diskmemload09:33:270
13620906632,24cyclictest13564-21ps08:11:230
13620906630,15cyclictest1103-21ssh10:49:340
13620906543,14cyclictest5572-21chrt07:56:350
13620906542,14cyclictest26335-21apt-get12:35:210
13620906535,21cyclictest15067-21users09:17:260
13620906533,22cyclictest24455-21/usr/sbin/munin09:35:380
13620906533,21cyclictest25327-21users12:32:210
13620906531,14cyclictest2698-21apt08:55:010
13620906433,21cyclictest1613-21ssh09:51:370
13620906432,23cyclictest28570-21sshd07:37:260
13620906432,23cyclictest10297-21diskmemload11:24:290
112412647,44sleep011182-21apt-get07:05:270
13620906339,16cyclictest28365-21apt-get10:40:260
13620906339,16cyclictest16108-21munin-run07:15:030
13620906338,16cyclictest16463-21df09:20:420
13620906335,21cyclictest26686-21users08:36:290
13620906335,18cyclictest32313-21runrttasks08:48:450
13620906333,21cyclictest9726-21/usr/sbin/munin12:07:170
13620906332,22cyclictest5062-21ssh10:58:060
13620906332,22cyclictest26739-21ntpq10:36:280
13620906331,23cyclictest12887-21diskstats12:10:480
13620906330,23cyclictest883-21runrttasks11:00:070
13620906330,13cyclictest30515-21ntpq07:41:160
13620906329,14cyclictest3158-21ntpq07:51:160
13620906239,15cyclictest17453-21munin-run08:20:000
13620906239,13cyclictest17294-21apt-get10:20:250
13620906236,16cyclictest22199-21ps07:25:420
13620906233,20cyclictest19042-21/usr/sbin/munin07:20:510
13620906233,20cyclictest18045-21/usr/sbin/munin12:20:590
13620906231,22cyclictest26116-21hddtemp_smartct11:35:560
13620906231,22cyclictest22867-21aten2.4_rfpower08:30:270
13620906231,22cyclictest20142-21/usr/sbin/munin08:25:260
13620906231,22cyclictest16503-21apt-get07:15:440
13620906229,23cyclictest7837-21latency_hist09:05:030
13620906137,15cyclictest883-21runrttasks08:20:240
13620906137,15cyclictest2852-21apt-get08:55:150
13620906137,14cyclictest8369-21chrt09:06:060
13620906137,14cyclictest10111-21diskstats08:05:320
13620906136,14cyclictest15317-21sshd12:15:280
13620906135,16cyclictest24322-21apt-get07:30:150
13620906131,22cyclictest23873-21rm10:31:130
13620906131,21cyclictest28450-21ld09:41:320
13620906130,22cyclictest8037-21ntpq12:01:170
13620906037,15cyclictest7584-21diskstats08:00:310
13620906033,19cyclictest20869-21chrt12:25:260
13620906032,8cyclictest18890-21apt-get09:25:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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