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2025-04-22 - 21:58

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 Apr 22, 2025 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
244821260,3chrt2447-21/usr/sbin/munin09:35:350
3274821180,2chrt32739-21ps09:31:420
3165221140,2sleep031650-21switchtime11:37:140
2238021110,2sleep022382-21irqrtprio09:11:370
2885921090,2chrt28857-21aten2.4_rfpower08:20:270
1965221090,2chrt19653-21ssh11:14:460
1272521090,3chrt12726-21sh09:56:030
2450721060,2sleep024510-21missed_timers08:10:530
1342621040,2chrt13427-21ssh12:05:490
185321030,2sleep01854-21ld07:25:540
1131321010,2chrt11314-21sh08:50:070
311892840,2sleep031191-21cut07:20:340
14832820,2sleep01475-21ps11:41:440
48832790,2sleep04886-21wc07:31:310
133612750,2sleep013362-21/usr/sbin/munin11:00:580
157812720,1sleep015782-21ssh12:11:010
85692700,1sleep08572-21cut11:56:020
278912540,2sleep027893-21ls07:15:010
25407905422,21cyclictest27253-21apt11:30:080
25407905321,22cyclictest4452-21ntpq10:42:490
25407905319,14cyclictest28147-21perl12:35:530
202242530,1sleep020225-21if_eth010:10:550
25407905222,20cyclictest5471-21ssh11:50:530
25407905216,16cyclictest20275-21df11:15:410
25407905124,18cyclictest11900-21munin-run09:55:050
25407905120,22cyclictest28187-21ssh10:26:100
25407905119,22cyclictest12454-21ssh12:03:010
25407905117,23cyclictest29591-21sleep10:30:220
25407905020,21cyclictest0-21swapper12:27:200
25407905019,22cyclictest26897-21apt-get09:20:490
25407905019,22cyclictest0-21swapper12:19:440
25407905018,21cyclictest16131-21sh10:01:460
25407905017,24cyclictest0-21swapper12:34:540
25407905017,13cyclictest25532-21ntpq09:16:500
25407904918,21cyclictest7337-21telnet10:50:280
25407904912,19cyclictest24555-21ssh11:22:550
327092480,3chrt32707-21/usr/sbin/munin10:35:470
25407904824,14cyclictest3799-21sh08:35:210
25407904818,22cyclictest0-21swapper09:47:470
25407904817,22cyclictest17802-21xargs09:01:260
25407904816,23cyclictest23651-21ssh10:16:440
25407904816,23cyclictest0-21swapper11:45:290
25407904816,22cyclictest19110-21/usr/sbin/munin08:00:460
25407904816,12cyclictest11923-21ntpq07:45:510
25407904815,23cyclictest6728-21perl08:40:330
25407904814,14cyclictest11579-21python310:57:150
25407904724,15cyclictest17183-21ntp_states07:56:160
25407904722,16cyclictest26306-21ntpq10:21:260
25407904717,23cyclictest11182-21ls08:50:000
25407904717,22cyclictest5264-21df09:40:410
25407904716,22cyclictest16898-21ssh11:09:470
25407904716,13cyclictest5919-21/usr/sbin/munin07:36:230
25407904714,14cyclictest21005-21ssh12:20:570
25407904621,16cyclictest28372-21chrt07:15:370
25407904617,20cyclictest0-21swapper09:25:270
25407904616,22cyclictest2309-21ntpq08:31:060
25407904616,21cyclictest9426-21grep07:40:520
25407904616,21cyclictest21262-21sleep08:05:280
25407904614,13cyclictest14868-21ntpq08:55:570
25407904613,14cyclictest26469-21diskstats08:15:410
25407904521,15cyclictest0-21swapper10:48:540
25407904520,16cyclictest13516-21apt-get07:50:220
25407904515,22cyclictest666-21runrttasks11:28:390
25407904515,22cyclictest666-21runrttasks10:08:000
2359324511,19sleep023772-21irqstats07:05:380
25407904422,14cyclictest32426-21grep08:26:210
25407904413,13cyclictest18909-21munin-node09:05:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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