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2025-08-21 - 21:27

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 Thu Aug 21, 2025 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1961286416,8623sleep225221-21kworker/2:011:55:152
283112633020,6298sleep319109-21kworker/3:008:11:273
7697251216,480sleep37706-21ntpq12:14:303
21480247212,445sleep021484-21ntpq07:49:320
21480247212,445sleep021484-21ntpq07:49:320
28809241411,387sleep028858-21/usr/sbin/munin08:14:230
28809241411,387sleep028858-21/usr/sbin/munin08:14:230
27959236222,319sleep028102-21sed11:34:340
16018235372,169sleep27679-21cyclictest10:59:042
3211234413,317sleep13247-21ntpq08:34:351
14469232018,126sleep214495-21modprobe10:54:032
18532230836,34sleep218626-21fschecks_time09:24:232
18532230836,34sleep218626-21fschecks_time09:24:232
22338228518,84sleep20-21swapper/211:19:062
22338228518,84sleep20-21swapper/211:19:062
19996225669,161sleep20-21swapper/209:29:202
1530225675,168sleep21594-21sendmail_mailst08:29:352
1530225675,168sleep21594-21sendmail_mailst08:29:352
15371224247,183sleep215451-21switchtime07:29:362
30735223742,20sleep20-21swapper/209:59:412
38492236125,93sleep23866-21awk12:04:032
28903222313,95sleep228949-21fschecks_count08:14:332
28903222313,95sleep228949-21fschecks_count08:14:332
23326221925,170sleep223475-21unixbench_singl11:19:432
23326221925,170sleep223475-21unixbench_singl11:19:432
17778221811,192sleep117802-21who09:19:371
9490220318,58sleep20-21swapper/207:14:102
9490220318,58sleep20-21swapper/207:14:102
30392220013,175sleep030423-21grep08:19:190
30114220014,167sleep330115-21systemd11:44:063
18410219413,166sleep018492-21grep07:39:350
24851219124,146sleep024858-21fschecks_time09:44:280
11802219111,166sleep211822-21grep07:19:392
11938218910,162sleep212059-21latency_hist12:29:062
32281217610,152sleep232325-21sed11:49:302
4090217413,96sleep24094-21cron08:39:042
30905217413,104sleep230982-21switchtime11:44:332
549121728,41sleep20-21swapper/210:24:242
17604217213,93sleep217646-21true11:04:042
946621709,103sleep2362-21snmpd08:54:312
795521676,13sleep10-21swapper/110:30:241
8825216362,53sleep20-21swapper/208:54:062
10226216054,22sleep20-21swapper/212:24:062
3308215916,125sleep33350-21idleruntime-cro10:19:043
3308215916,125sleep33350-21idleruntime-cro10:19:043
28004215713,120sleep20-21swapper/209:54:072
15061215749,73sleep215074-21latency_hist09:14:052
24799215655,52sleep20-21swapper/209:44:262
21420215610,131sleep221469-21ntpq07:49:302
21420215610,131sleep221469-21ntpq07:49:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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