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2025-09-17 - 19:53

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 Sep 17, 2025 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
884244129,4333sleep029653-21kworker/u8:112:07:580
190222178817,1756sleep219023-21ntp_states07:57:582
1156028138,792sleep011550-21apt-get09:17:500
1156028138,792sleep011550-21apt-get09:17:500
5743259511,569sleep15753-21ntpq08:57:561
2838722807,196sleep028450-21cpuspeed11:52:440
29585225718,218sleep029740-21unixbench_multi10:13:010
14357225569,62sleep014440-21awk11:08:070
18185225010,226sleep2362-21snmpd11:21:462
3872224352,22sleep00-21swapper/007:12:300
27446223775,143sleep027553-21fschecks_time10:07:480
23740221519,183sleep023796-21latency08:13:020
23740221519,183sleep023796-21latency08:13:020
17457220419,160sleep017461-21cron09:37:280
2310422008,64sleep00-21swapper/011:37:100
2310422008,64sleep00-21swapper/011:37:100
2045421918,18sleep00-21swapper/011:27:530
10593217615,42sleep010675-21fschecks_time10:57:500
29782217322,125sleep229875-21fschecks_time08:32:502
24926217211,146sleep025055-21unixbench_multi09:58:070
2615621689,147sleep026167-21apt.systemd.dai11:46:100
15201216810,17sleep00-21swapper/011:12:310
2707821668,135sleep00-21swapper/008:22:590
32430216511,140sleep032443-21awk08:38:170
10446216411,22sleep00-21swapper/009:12:570
15438216320,41sleep00-21swapper/007:47:460
15438216320,41sleep00-21swapper/007:47:460
699121619,26sleep00-21swapper/009:02:520
5925215915,124sleep00-21swapper/012:22:520
3072215911,21sleep00-21swapper/010:32:550
2998215915,55sleep33073-21grep12:12:583
1089621569,11sleep30-21swapper/307:32:513
737721548,134sleep07425-21latency12:27:520
506921548,18sleep05138-21cat07:13:020
31793215310,125sleep031847-21latency_hist10:22:290
3064021515,12sleep00-21swapper/008:33:290
30052215123,107sleep130146-21fschecks_time11:57:501
22951215111,119sleep00-21swapper/008:12:290
1979121497,12sleep00-21swapper/008:02:030
23712214670,64sleep023730-21kernelversion11:37:500
9395214518,107sleep00-21swapper/012:33:010
2246214416,111sleep32308-21/usr/sbin/munin08:47:493
4977214225,97sleep15015-21munin-run08:57:281
71221416,11sleep00-21swapper/010:25:480
8418214019,27sleep00-21swapper/009:07:440
1519721409,22sleep00-21swapper/007:47:300
1519721409,22sleep00-21swapper/007:47:300
1002121406,11sleep00-21swapper/010:55:240
829213923,96sleep1351-21apt-get12:07:391
21474213723,88sleep10-21swapper/111:32:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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