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2025-11-09 - 02:17

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 Sat Nov 08, 2025 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14065280812,778sleep214180-21/usr/sbin/munin09:19:582
2925225357,512sleep129297-21ntpq11:49:531
2310725017,51sleep00-21swapper/009:49:520
5778240416,274sleep05924-21grep10:35:020
7380240212,302sleep07527-21latency_hist12:24:280
10667238340,299sleep010435-21apt-get12:34:290
24320233228,202sleep024333-21fschecks_count11:34:460
25631227796,163sleep025593-21latency_hist09:59:280
24442226915,235sleep324519-21/usr/sbin/munin09:54:473
8757226232,183sleep08827-21ls07:20:000
30477225215,190sleep030544-21kworker/u8:110:14:260
18283224753,174sleep018328-21latency11:14:510
8517221112,121sleep08669-21latency_hist09:04:290
15212220828,58sleep00-21swapper/011:04:580
14393220617,169sleep214446-21latency_hist11:04:272
14393220617,169sleep214446-21latency_hist11:04:272
2796220515,78sleep02973-21apt-config07:04:290
5355220315,149sleep05438-21latency_hist08:54:280
130422029,17sleep00-21swapper/012:04:500
130422029,17sleep00-21swapper/012:04:500
18169220021,157sleep218188-21fschecks_count09:34:472
846821980,13sleep00-21swapper/010:44:500
2654621966,173sleep00-21swapper/011:39:590
26896219414,126sleep026897-21cpu08:19:440
29389219119,80sleep029511-21timerwakeupswit08:25:210
7015218611,63sleep00-21swapper/007:14:510
32588218512,98sleep032663-21switchtime12:00:010
28969218315,149sleep029049-21fschecks_time11:49:480
6328216810,140sleep06385-21lockfile-create07:14:270
6328216810,140sleep06385-21lockfile-create07:14:270
22838216825,125sleep322916-21sort09:49:463
7802216321,131sleep00-21swapper/010:43:340
30769215931,113sleep030772-21acpi10:14:390
20893215336,104sleep020927-21awk09:44:260
1446215311,128sleep01536-21systemd-run10:24:280
5058215021,96sleep35111-21ls07:09:413
5058215021,96sleep35111-21ls07:09:413
21184215028,92sleep00-21swapper/009:44:430
1348421430,10sleep10-21swapper/109:19:441
1536121429,25sleep015409-21ntp_offset09:24:520
10271213711,106sleep00-21swapper/009:09:420
27571213513,107sleep00-21swapper/011:44:510
17886213320,92sleep317712-21latency_hist11:14:303
16989213321,98sleep00-21swapper/011:10:110
4633213220,92sleep14715-21grep08:50:011
11382213114,103sleep111394-21fschecks_count07:29:461
3695213011,40sleep00-21swapper/010:29:490
3695213011,40sleep00-21swapper/010:29:490
19343213022,91sleep00-21swapper/009:39:260
32018212818,93sleep131993-21/usr/sbin/munin11:59:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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