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2026-06-08 - 23:22

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 Mon Jun 08, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1294921230,2chrt12942-21ntpq10:41:480
574921220,3chrt5746-21ntpq09:42:220
2198821200,2chrt21990-21fschecks_time10:55:530
900721180,2chrt9002-21ntpq09:47:040
3092421180,3chrt28911-21/usr/sbin/munin11:57:220
2635421160,2chrt26353-21seq10:13:160
2387221160,2chrt23873-21fschecks_count12:35:500
1197621160,2chrt11977-21if_eth208:10:410
2980821150,2chrt29809-21apt-key09:30:230
1722721140,3chrt17226-21sed10:00:030
1085221140,2chrt10854-21sleep12:16:390
1827421120,2sleep018275-21chrt11:38:510
1800621120,2sleep018008-21processes09:12:250
1232721120,2chrt12328-21chrt07:20:010
763221110,2chrt7633-21seq10:34:210
1528021110,3chrt15281-21sh07:24:410
131921100,2sleep01320-21chrt11:13:220
453421070,2chrt4535-21sh07:59:030
3250321070,2sleep032498-21swap10:22:190
1586421060,2chrt15865-21sleep09:09:460
2680021050,2sleep026801-21tune2fs09:25:520
1972321050,2sleep019724-21chrt12:30:050
82552990,2sleep08256-21ssh12:12:140
30042960,1sleep03002-21ntp_states10:26:500
176692960,2sleep017673-21aten2.4_rfpower08:20:240
126092930,1sleep012607-21timerandwakeup09:52:200
246132910,2sleep024614-21seq08:30:430
8142900,1sleep0815-21irqrtprio12:01:070
74992880,2sleep07500-21ld07:11:100
19842880,2sleep01982-21pluginstate08:46:220
85672850,1sleep08568-21seq11:24:240
161622800,2sleep016163-21sh12:24:330
211232790,1sleep021124-21chrt10:54:530
170892790,2sleep017090-21seq10:48:080
15602780,2sleep01562-21cut09:36:050
108212780,2sleep010823-21seq10:39:030
96722760,2sleep09674-21tr08:06:250
6118907614,53cyclictest28030-21apt-get11:05:160
215402760,2sleep021542-21sort09:17:260
243332750,2sleep024334-21chrt09:21:430
121632750,2sleep012164-21chrt11:30:010
54262740,1sleep05427-21chrt12:08:050
611890726,48cyclictest3812-21chrt11:17:010
611890715,56cyclictest31161-21munin-run07:50:000
611890715,47cyclictest23654-21users07:36:310
611890706,55cyclictest5243-21chrt08:51:280
611890705,54cyclictest9925-21/usr/sbin/munin09:00:330
611890704,56cyclictest21327-21rm11:43:100
611890704,55cyclictest31512-21switchtime08:41:290
611890704,55cyclictest21057-21ssh10:05:430
611890704,50cyclictest27172-21df08:35:280
611890703,57cyclictest21743-21ntpq08:25:590
611890698,51cyclictest27268-21apt-get10:15:150
611890696,54cyclictest14395-21/usr/sbin/munin08:16:290
611890695,44cyclictest7916-21sleep08:55:570
611890694,55cyclictest25168-21ssh11:00:480
611890694,47cyclictest25597-21apt-get11:50:290
611890694,45cyclictest15825-21apt-get07:26:010
611890693,55cyclictest20722-21sleep12:31:180
611890685,54cyclictest18490-21memory10:01:150
611890685,53cyclictest25487-21df_inode07:40:310
611890685,52cyclictest21830-21munin-run07:35:020
611890684,53cyclictest31685-21diskstats07:50:310
6118906813,47cyclictest23631-21ntpq11:46:310
611890675,53cyclictest13807-21runrttasks11:31:460
611890674,54cyclictest6246-21ntpq08:01:000
36652677,49sleep03720-21if_eth207:05:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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