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2026-05-20 - 04:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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 here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Note that this system runs a non-RT kernel.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Wed May 20, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41322405413,4028sleep31647-21kworker/3:021:03:033
243462265810,2636sleep222591-21kworker/2:023:49:122
23439267319,616sleep123520-21cat23:44:391
23439267319,616sleep123520-21cat23:44:391
11400262618,585sleep211420-21cron23:09:062
3443259319,553sleep13478-21cron19:19:061
3408257712,550sleep03415-21ntp_states20:59:330
14827247212,445sleep014820-21apt-get23:19:220
20388239887,213sleep120532-21tail23:34:381
18556238633,297sleep118597-21ntpq23:29:451
1013238611,358sleep21139-21/usr/sbin/munin19:09:422
27341233033,282sleep127432-21sed22:14:371
29352307107,92sleep12973-21fschecks_count00:24:251
20718229698,184sleep120756-21ls21:54:261
32678225965,157sleep132714-21ntpq20:49:331
32678225965,157sleep132714-21ntpq20:49:331
36212241109,116sleep13632-21modprobe22:44:051
36212241109,116sleep13632-21modprobe22:44:051
12525224013,214sleep212534-21unin-run21:29:072
20246223638,179sleep120256-21modprobe21:54:061
17702223138,171sleep117729-21munin-run23:29:081
12513222791,30sleep10-21swapper/119:44:381
10867222545,162sleep111057-21apt-config21:24:091
26008222413,199sleep326014-21cat23:54:223
30715222359,121sleep130823-21fschecks_time00:09:271
31944221981,27sleep10-21swapper/122:29:281
17204221618,22sleep10-21swapper/121:44:081
2645220650,114sleep12795-21latency_hist00:24:091
32431220390,21sleep10-21swapper/119:09:091
10718219831,24sleep10-21swapper/119:39:581
10718219831,24sleep10-21swapper/119:39:581
1358217924,105sleep11432-21switchtime22:34:361
1358217924,105sleep11432-21switchtime22:34:361
12072217742,89sleep112114-21ntpq23:09:301
25825217411,149sleep125925-21timerandwakeup22:09:371
25825217411,149sleep125925-21timerandwakeup22:09:371
345217113,114sleep10-21swapper/100:14:361
29606217134,124sleep129646-21http22:24:061
883217012,19sleep10-21swapper/119:09:411
14506216811,103sleep10-21swapper/123:19:071
25702216612,141sleep125846-21latency_hist23:54:081
1816421656,13sleep00-21swapper/023:29:240
15195216542,109sleep115243-21ntp_kernel_pll_23:19:311
2629021636,121sleep00-21swapper/023:54:280
32033215312,107sleep132087-21cat20:49:081
15454214915,86sleep10-21swapper/119:54:361
21491214714,16sleep10-21swapper/120:14:471
21491214714,16sleep10-21swapper/120:14:471
15983214723,100sleep316023-21fschecks_count21:39:263
693021457,12sleep00-21swapper/019:29:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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