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2025-04-11 - 23:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rack4slot6s.osadl.org (updated Fri Apr 11, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2923322490,3sleep029234-21cat08:00:260
1200822450,2sleep012007-21grep11:20:110
205422430,2sleep02053-21ls10:35:310
3118721390,4chrt31189-21latency_hist08:10:020
2532121350,2sleep025320-21threads09:55:250
272021300,3sleep02719-21grep08:25:110
2736721280,2sleep027369-21latency_hist10:05:020
799821240,2sleep07997-21interrupts08:45:180
2183721230,3chrt21838-21modprobe12:01:010
2763321210,2sleep027636-21basename12:30:000
308752990,4sleep030901-21/usr/sbin/munin10:20:170
276692960,3sleep027696-21ntpq07:55:220
282592950,3sleep028328-21uptime12:30:230
199372950,3sleep019975-21if_eth011:55:170
98802940,4sleep09942-21/usr/sbin/munin11:10:310
50362925,9sleep05078-21/usr/sbin/munin10:50:170
105672900,3sleep010601-21cat08:55:170
250522880,3sleep025113-21/usr/sbin/munin07:45:200
169712889,63sleep016977-21df_inode09:20:130
269192870,2sleep026920-21idleruntime-cro12:25:000
1505328021,32sleep015116-21users07:05:260
282962775,59sleep028297-21memory10:10:140
235682735,57sleep023574-21df09:50:090
276412603,5sleep00-21swapper10:07:100
1573099609,17cyclictest14320-21/usr/sbin/munin09:10:250
1573099608,16cyclictest18423-21/usr/sbin/munin07:20:180
15730996034,16cyclictest5465-21/usr/sbin/munin08:35:190
15730996031,21cyclictest14318-21/usr/sbin/munin11:30:240
15730996016,14cyclictest22997-21sshd07:36:310
15730996010,19cyclictest17749-21idleruntime-cro11:45:000
1573099599,16cyclictest32631-21df08:15:130
1573099599,16cyclictest11131-21awk11:15:280
1573099598,19cyclictest4003-21/usr/sbin/munin08:30:240
1573099598,17cyclictest29399-21/usr/sbin/munin10:15:170
15730995935,15cyclictest19976-21/usr/sbin/munin07:25:200
15730995933,18cyclictest32508-21latency_hist08:15:010
15730995932,15cyclictest23870-21/usr/sbin/munin07:40:230
15730995913,13cyclictest32694-21/usr/sbin/munin10:30:160
1573099588,16cyclictest26146-21/usr/sbin/munin07:50:200
15730995810,17cyclictest9739-21users08:50:320
171902570,2sleep017189-21forks07:15:150
1573099579,17cyclictest24442-21/usr/sbin/munin12:15:120
1573099579,14cyclictest6585-21/usr/sbin/munin08:40:290
1573099578,16cyclictest16777-21run-parts09:20:010
1573099577,16cyclictest29037-21/usr/sbin/munin12:35:190
15730995734,14cyclictest3395-21/usr/sbin/munin10:40:290
15730995730,16cyclictest19047-21/usr/sbin/munin09:30:160
15730995728,20cyclictest7634-21/usr/sbin/munin11:00:210
15730995711,16cyclictest18731-21sort11:50:140
15730995711,15cyclictest6457-21/usr/sbin/munin10:55:260
15730995710,15cyclictest16526-21date11:40:020
1573099569,17cyclictest22770-21latency_hist09:45:020
1573099568,16cyclictest12828-21sshd09:04:320
1573099568,15cyclictest13018-21/usr/sbin/munin09:05:140
1573099568,13cyclictest15833-21/usr/sbin/munin07:10:140
1573099567,15cyclictest20282-21df09:35:120
15730995632,16cyclictest13648-21runrttasks11:28:160
15730995629,20cyclictest18258-21runrttasks11:48:280
15730995612,16cyclictest4700-21munin-run10:50:000
1573099558,18cyclictest8701-21seq11:05:150
1573099558,18cyclictest23408-21munin-run09:50:000
1573099558,17cyclictest32391-21sshd10:28:330
1573099557,14cyclictest1436-21/usr/sbin/munin08:20:270
15730995530,16cyclictest20996-21/usr/sbin/munin07:30:160
15730995410,15cyclictest23178-21/usr/sbin/munin12:10:390
1573099539,17cyclictest18237-21sshd09:25:320
1573099538,17cyclictest22856-21seq12:08:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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