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2025-11-30 - 11:01

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 Sun Nov 30, 2025 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27477271119,674sleep127590-21/usr/sbin/munin20:58:491
27477271119,674sleep127590-21/usr/sbin/munin20:58:491
21006263024,594sleep221012-21ntpq00:03:402
990826016,557sleep29935-21ntpq20:03:412
990826016,557sleep29935-21ntpq20:03:412
22111242347,340sleep222166-21tune2fs20:43:352
9132236510,295sleep29134-21cpu23:28:272
16133230212,276sleep116179-21ntpq20:23:391
16133230212,276sleep116179-21ntpq20:23:391
3091322927,274sleep25666-21snmpd21:11:132
14601225550,165sleep214640-21ntp_kernel_pll_20:18:392
43632250135,71sleep20-21swapper/219:48:142
43632250135,71sleep20-21swapper/219:48:142
1195223343,67sleep21300-21fschecks_time23:03:322
23893223131,179sleep223928-21cron22:33:112
16240222416,87sleep20-21swapper/223:48:582
16240222416,87sleep20-21swapper/223:48:582
5877222022,68sleep20-21swapper/223:18:342
24816221643,125sleep224880-21mailstats19:08:442
24816221643,125sleep224880-21mailstats19:08:442
17103220918,174sleep017177-21systemd-run23:53:120
17103220918,174sleep017177-21systemd-run23:53:120
11157220567,55sleep20-21swapper/220:08:332
21288219025,145sleep321433-21unixbench_singl00:03:453
29598217215,96sleep229741-21grep22:48:462
22614217018,133sleep122726-21timerandwakeup20:43:461
28711216643,13sleep20-21swapper/221:03:422
12653216246,55sleep20-21swapper/220:13:302
19193215785,53sleep20-21swapper/222:18:132
19193215785,53sleep20-21swapper/222:18:132
9216215612,132sleep19222-21cat23:28:301
1365121556,13sleep20-21swapper/221:58:432
1365121556,13sleep20-21swapper/221:58:432
2479421549,132sleep224888-21cat22:33:482
29046215175,18sleep20-21swapper/200:28:402
25763214323,53sleep20-21swapper/222:38:282
16833214329,104sleep216273-21/usr/sbin/munin22:08:442
29577214213,114sleep329638-21switchtime19:23:483
19790214250,77sleep219803-21awk20:33:542
2731521417,16sleep20-21swapper/222:43:292
2764821399,58sleep20-21swapper/219:18:342
18869213810,117sleep05666-21snmpd22:14:440
18869213810,117sleep05666-21snmpd22:14:440
1981721370,8sleep00-21swapper/023:58:440
3170021365,12sleep20-21swapper/219:31:342
17305213642,53sleep20-21swapper/220:28:282
29557213520,85sleep10-21swapper/121:08:141
29508213531,92sleep229576-21systemctl19:23:472
27408213515,99sleep20-21swapper/200:23:392
11235213411,109sleep211310-21munin-run21:53:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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